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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2013	Oct. 31, 2013
Entity Registrant Name	SL GREEN REALTY CORP
Entity Central Index Key	0001040971
Document Type	10-Q
Document Period End Date	Sep. 30, 2013
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		92,260,239
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
SL Green Operating Partnership
Entity Registrant Name	SL GREEN OPERATING PARTNERSHIP, L.P.
Entity Central Index Key	0001492869
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		879,183

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Commercial real estate properties, at cost:
Land and land interests	$ 2,868,833	$ 2,886,099
Building and improvements	7,440,543	7,389,766
Building leasehold and improvements	1,353,997	1,346,748
Properties under capital lease	50,332	40,340
Total commercial real estate properties, at cost	11,713,705	11,662,953
Less: accumulated depreciation	(1,574,002)	(1,393,323)
Total commercial real estate properties, net	10,139,703	10,269,630
Assets held for sale	0	4,901
Cash and cash equivalents	209,098	189,984
Restricted cash	356,844	136,071
Investment in marketable securities	32,863	21,429
Tenant and other receivables, net of allowance of $22,383 and $21,652 in 2013 and 2012, respectively	51,354	48,544
Related party receivables	7,800	7,531
Deferred rents receivable, net of allowance of $29,508 and $29,580 in 2013 and 2012, respectively	374,615	340,747
Debt and preferred equity investments, net of discounts and deferred origination fees of $26,466 and $22,341 in 2013 and 2012, and allowance of $4,000 and $7,000 in 2013 and 2012, respectively	1,315,551	1,348,434
Investments in unconsolidated joint ventures	1,109,815	1,032,243
Deferred costs, net	247,850	261,145
Other assets	729,426	718,326
Total assets	14,574,919	14,378,985
Liabilities
Mortgages and other loans payable	4,641,758	4,615,464
Revolving credit facility	340,000	70,000
Term loan and senior unsecured notes	1,737,869	1,734,956
Accrued interest payable and other liabilities	69,359	73,769
Accounts payable and accrued expenses	167,719	159,598
Deferred revenue	293,393	312,995
Capitalized lease obligations	47,492	37,518
Deferred land leases payable	21,066	20,897
Dividend and distributions payable	34,749	37,839
Security deposits	54,824	46,253
Liabilities related to assets held for sale	0	136
Junior subordinate deferrable interest debentures held by trusts that issued trust preferred securities	100,000	100,000
Total liabilities	7,508,229	7,209,425
Commitments and contingencies	0	0
Equity
Common stock, $0.01 par value, 160,000 shares authorized and 95,780 and 94,896 issued and outstanding at September 30, 2013 and December 31, 2012, respectively (including 3,566 and 3,646 shares held in Treasury at September 30, 2013 and December 31, 2012, respectively)	959	950
Additional paid-in-capital	4,757,778	4,667,900
Treasury stock at cost	(316,989)	(322,858)
Accumulated other comprehensive loss	(19,249)	(29,587)
Retained earnings	1,636,584	1,701,092
Total SL Green stockholders' equity	6,281,015	6,419,802
Noncontrolling interests in other partnerships	488,079	487,301
Total equity	6,769,094	6,907,103
Total liabilities and equity	14,574,919	14,378,985
Series G Preferred Units
Liabilities
Preferred Units	47,550	47,550
Series H Preferred Units
Liabilities
Preferred Units	2,000	2,000
Series C Preferred Units
Equity
Preferred stock	0	180,340
Series I Preferred Units
Equity
Preferred stock	221,932	221,965
SL Green Operating Partnership
Commercial real estate properties, at cost:
Land and land interests	2,868,833	2,886,099
Building and improvements	7,440,543	7,389,766
Building leasehold and improvements	1,353,997	1,346,748
Properties under capital lease	50,332	40,340
Total commercial real estate properties, at cost	11,713,705	11,662,953
Less: accumulated depreciation	(1,574,002)	(1,393,323)
Total commercial real estate properties, net	10,139,703	10,269,630
Assets held for sale	0	4,901
Cash and cash equivalents	209,098	189,984
Restricted cash	356,844	136,071
Investment in marketable securities	32,863	21,429
Tenant and other receivables, net of allowance of $22,383 and $21,652 in 2013 and 2012, respectively	51,354	48,544
Related party receivables	7,800	7,531
Deferred rents receivable, net of allowance of $29,508 and $29,580 in 2013 and 2012, respectively	374,615	340,747
Debt and preferred equity investments, net of discounts and deferred origination fees of $26,466 and $22,341 in 2013 and 2012, and allowance of $4,000 and $7,000 in 2013 and 2012, respectively	1,315,551	1,348,434
Investments in unconsolidated joint ventures	1,109,815	1,032,243
Deferred costs, net	247,850	261,145
Other assets	729,426	718,326
Total assets	14,574,919	14,378,985
Liabilities
Mortgages and other loans payable	4,641,758	4,615,464
Revolving credit facility	340,000	70,000
Term loan and senior unsecured notes	1,737,869	1,734,956
Accrued interest payable and other liabilities	69,359	73,769
Accounts payable and accrued expenses	167,719	159,598
Deferred revenue	293,393	312,995
Capitalized lease obligations	47,492	37,518
Deferred land leases payable	21,066	20,897
Dividend and distributions payable	34,749	37,839
Security deposits	54,824	46,253
Liabilities related to assets held for sale	0	136
Junior subordinate deferrable interest debentures held by trusts that issued trust preferred securities	100,000	100,000
Total liabilities	7,508,229	7,209,425
Commitments and contingencies	0	0
Equity
Accumulated other comprehensive loss	(19,821)	(30,649)
Total liabilities and equity	14,574,919	14,378,985
SLGOP Partners' Capital
General And Limited Partners Capital Account	6,259,229	6,189,529
Limited Partners' Capital Account	67,721	71,524
Partners' Capital	6,529,061	6,632,709
Partners' Capital Attributable to Noncontrolling Interest	488,079	487,301
Total capital	7,017,140	7,120,010
SL Green Operating Partnership \| Series G Preferred Units
Liabilities
Preferred Units	47,550	47,550
SL Green Operating Partnership \| Series H Preferred Units
Liabilities
Preferred Units	2,000	2,000
SL Green Operating Partnership \| Series C Preferred Units
SLGOP Partners' Capital
Preferred Units, Preferred Partners' Capital Accounts	0	180,340
Total capital	0	180,340
SL Green Operating Partnership \| Series I Preferred Units
SLGOP Partners' Capital
Preferred Units, Preferred Partners' Capital Accounts	221,932	221,965
Total capital	$ 221,932	$ 221,965

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Tenant and other receivables, allowance (in dollars)	$ 22,383	$ 21,652
Deferred rents receivable, allowance (in dollars)	29,508	29,580
Debt and preferred equity investments, discount and deferred origination fees (in dollars)	26,466	22,341
Debt and preferred equity investments, allowance (in dollars)	$ 4,000	$ 7,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	160,000,000	160,000,000
Common stock, shares issued (in shares)	95,780,000	94,896,000
Common stock, shares outstanding (in shares)	95,780,000	94,896,000
Treasury stock, shares (in shares)	3,566,000	3,646,000
Series G Preferred Units
Preferred Units, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Preferred Units, shares issued (in shares)	1,902,000	1,902,000
Preferred Units, shares outstanding (in shares)	1,902,000	1,902,000
Series H Preferred Units
Preferred Units, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Preferred Units, shares issued (in shares)	80,000	80,000
Preferred Units, shares outstanding (in shares)	80,000	80,000
Series C Preferred Units
Preferred Units, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Preferred stock, par value (in dollars per share)	0.01	$ 0.01
Preferred stock, shares issued (in shares)		7,700,000
Preferred stock, shares outstanding (in shares)		7,700,000
Series I Preferred Units
Preferred Units, liquidation preference (in dollars per share)	25.00	$ 25.00
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)	9,200,000	9,200,000
Preferred stock, shares outstanding (in shares)	9,200,000	9,200,000
SL Green Operating Partnership
Tenant and other receivables, allowance (in dollars)	$ 22,383	$ 21,652
Deferred rents receivable, allowance (in dollars)	29,508	29,580
Debt and preferred equity investments, discount and deferred origination fees (in dollars)	26,466	22,341
Debt and preferred equity investments, allowance (in dollars)	$ 4,000	$ 7,000
SL Green partners' capital, general partner common units outstanding (in shares)	950,000	940,000
SL Green partners' capital, limited partner common units outstanding (in shares)	91,264,000	90,310,000
Limited partner interests in Operating Partnership, limited partner common units outstanding (in shares)	2,792,000	2,760,000
SL Green Operating Partnership \| Series G Preferred Units
Preferred Units, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Preferred Units, shares issued (in shares)	1,902,000	1,902,000
Preferred Units, shares outstanding (in shares)	1,902,000	1,902,000
SL Green Operating Partnership \| Series H Preferred Units
Preferred Units, liquidation preference (in dollars per share)	$ 25.00	$ 25.00
Preferred Units, shares issued (in shares)	80,000	80,000
Preferred Units, shares outstanding (in shares)	80,000	80,000
SL Green Operating Partnership \| Series C Preferred Units
Preferred stock, shares issued (in shares)		7,700,000
Preferred stock, shares outstanding (in shares)		7,700,000
SL Green Operating Partnership \| Series I Preferred Units
Preferred stock, shares issued (in shares)	9,200,000	9,200,000
Preferred stock, shares outstanding (in shares)	9,200,000	9,200,000

Consolidated Statements of Income shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013 USD ($) $ / shares $ / partnership_unit shares	Sep. 30, 2012 USD ($) $ / shares $ / partnership_unit shares	Sep. 30, 2013 USD ($) $ / shares $ / partnership_unit shares	Sep. 30, 2012 USD ($) $ / shares $ / partnership_unit shares
Revenues
Rental revenue, net	$ 264,349	$ 277,676	$ 804,104	$ 798,271
Escalation and reimbursement	45,091	42,194	125,018	124,273
Investment and preferred equity income	44,448	27,869	143,887	87,655
Other income	9,877	9,272	21,369	25,931
Total revenues	363,765	357,011	1,094,378	1,036,130
Expenses
Operating expenses, including approximately $4,876 and $13,345 (2013) and $4,670 and $12,914 (2012) paid to related parties	77,272	82,351	218,901	221,670
Real estate taxes	55,511	53,293	161,625	156,746
Ground rent	10,127	8,874	29,767	26,570
Interest expense, net of interest income	82,973	85,659	247,420	247,789
Amortization of deferred financing costs	4,331	4,493	13,034	11,626
Depreciation and amortization	87,473	81,827	248,587	233,566
Loan loss and other investment reserves, net of recoveries	0	0	0	564
Transaction related costs, net of recoveries	(2,349)	1,372	719	4,398
Marketing, general and administrative	20,869	20,551	63,450	61,469
Total expenses	336,207	338,420	983,503	964,398
Income from continuing operations before equity in net income from unconsolidated joint ventures, equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate, gain (loss) on sale of investment in marketable securities, purchase price fair value adjustment and loss on early extinguishment of debt	27,558	18,591	110,875	71,732
Equity in net income from unconsolidated joint ventures	2,939	11,658	4,251	80,988
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(354)	(4,807)	(3,937)	17,776
Gain (loss) on sale of investment in marketable securities	0	2,237	(65)	2,237
Purchase price fair value adjustment	0	0	(2,305)	0
Loss on early extinguishment of debt	0	0	(18,523)	0
Income from continuing operations	30,143	27,679	90,296	172,733
Net income from discontinued operations	1,406	951	1,725	2,883
Gain on sale of discontinued operations	13,787	0	14,900	6,627
Net income	45,336	28,630	106,921	182,243
Net income attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	(1,110)	(567)	(1,909)	(4,876)
Noncontrolling interests in other partnerships	(2,901)	(1,835)	(8,806)	(6,792)
Preferred unit distributions	(562)	(571)	(1,692)	(1,533)
Net income attributable to SL Green	40,763	25,657	94,514	169,042
Preferred stock redemption costs	0	(10,010)	(12,160)	(10,010)
Perpetual preferred stock dividends	(3,738)	(7,915)	(18,144)	(23,004)
Net income attributable to SL Green common stockholders	37,025	7,732	64,210	136,028
Amounts attributable to SL Green common stockholders:
Income from continuing operations	22,623	11,451	54,125	109,687
Purchase price fair value adjustment	0	0	(2,239)	0
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(344)	(4,636)	(3,825)	17,160
Net income from discontinued operations	1,365	917	1,676	2,783
Gain on sale of discontinued operations	13,381	0	14,473	6,398
Net income	$ 37,025	$ 7,732	$ 64,210	$ 136,028
Basic earnings per share:
Income from continuing operations before discontinued operations (in dollars per share) \| $ / shares	$ 0.25	$ 0.13	$ 0.57	$ 1.24
Gain (Loss) on Sale of Unconsolidated Joint Ventures or Real Estate, Per Basic Share \| $ / shares	0.00	(0.05)	(0.04)	0.19
Net (loss) income from discontinued operations (in dollars per share) \| $ / shares	0.00	0.01	0.01	0.03
Gain (Loss) on Sale of Discontinued Operations, Net of Noncontrolling Interest, Per Basic Share \| $ / shares	0.15	0.00	0.16	0.07
Net income attributable to SL Green common stockholders (in dollars per share) \| $ / shares	0.40	0.09	0.70	1.53
Diluted earnings per share:
Net income from continuing operations before discontinued operations (in dollars per share) \| $ / shares	0.25	0.13	0.56	1.23
Gain (Loss) on Sale of Unconsolidated Joint Ventures or Real Estate, Per Diluted Share \| $ / shares	0.00	(0.05)	(0.04)	0.19
Net (loss) income from discontinued operations (in dollars per share) \| $ / shares	0.00	0.01	0.02	0.03
Gain (Loss) on Sale of Discontinued Operations, Per Diluted Share \| $ / shares	0.15	0.00	0.16	0.07
Income attributable to SL Green common stockholders (in dollars per share) \| $ / shares	0.40	0.09	0.70	1.52
Dividends per share (in dollars per share) \| $ / shares	$ 0.33	$ 0.25	$ 0.99	$ 0.75
Basic weighted average common shares outstanding (in shares) \| shares	91,988	90,241	91,684	88,929
Diluted weighted average common shares and common share equivalents outstanding (in shares) \| shares	95,016	93,891	94,631	92,485
Amounts attributable to SLGOP common unitholders:
Purchase price fair value adjustment			$ (2,305)	$ 0
SL Green Operating Partnership
Revenues
Rental revenue, net	$ 264,349	$ 277,676	804,104	798,271
Escalation and reimbursement	45,091	42,194	125,018	124,273
Investment and preferred equity income	44,448	27,869	143,887	87,655
Other income	9,877	9,272	21,369	25,931
Total revenues	363,765	357,011	1,094,378	1,036,130
Expenses
Operating expenses, including approximately $4,876 and $13,345 (2013) and $4,670 and $12,914 (2012) paid to related parties	77,272	82,351	218,901	221,670
Real estate taxes	55,511	53,293	161,625	156,746
Ground rent	10,127	8,874	29,767	26,570
Interest expense, net of interest income	82,973	85,659	247,420	247,789
Amortization of deferred financing costs	4,331	4,493	13,034	11,626
Depreciation and amortization	87,473	81,827	248,587	233,566
Loan loss and other investment reserves, net of recoveries	0	0	0	564
Transaction related costs, net of recoveries	(2,349)	1,372	719	4,398
Marketing, general and administrative	20,869	20,551	63,450	61,469
Total expenses	336,207	338,420	983,503	964,398
Income from continuing operations before equity in net income from unconsolidated joint ventures, equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate, gain (loss) on sale of investment in marketable securities, purchase price fair value adjustment and loss on early extinguishment of debt	27,558	18,591	110,875	71,732
Equity in net income from unconsolidated joint ventures	2,939	11,658	4,251	80,988
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(354)	(4,807)	(3,937)	17,776
Gain (loss) on sale of investment in marketable securities	0	2,237	(65)	2,237
Purchase price fair value adjustment	0	0	(2,305)	0
Loss on early extinguishment of debt	0	0	(18,523)	0
Income from continuing operations	30,143	27,679	90,296	172,733
Net income from discontinued operations	1,406	951	1,725	2,883
Gain on sale of discontinued operations	13,787	0	14,900	6,627
Net income	45,336	28,630	106,921	182,243
Net income attributable to noncontrolling interests:
Noncontrolling interests in other partnerships	(2,901)	(1,835)	(8,806)	(6,792)
Net income attributable to SL Green	41,873	26,224	96,423	173,918
Amounts attributable to SL Green common stockholders:
Income from continuing operations	23,296	12,155	55,736	113,618
Gain on sale of discontinued operations	$ 13,787	$ 0	$ 14,900	$ 6,627
Basic earnings per share:
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate (in dollars per share) \| $ / partnership_unit	0.00	(0.05)	(0.04)	0.19
Gain on sale of discontinued operations (in dollars per share) \| $ / partnership_unit	0.15	0.00	0.16	0.07
Diluted earnings per share:
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate (in dollars per share) \| $ / partnership_unit	0.00	(0.05)	(0.04)	0.19
Gain on sale of discontinued operations (in dollars per share) \| $ / partnership_unit	0.15	0.00	0.16	0.07
Amounts attributable to SLGOP common unitholders:
Purchase price fair value adjustment	$ 0	$ 0	$ (2,305)	$ 0
Preferred unit distributions	(562)	(571)	(1,692)	(1,533)
Preferred unit redemption costs	0	(10,010)	(12,160)	(10,010)
Perpetual preferred unit distributions	(3,738)	(7,915)	(18,144)	(23,004)
Net income attributable to SLGOP common unitholders	38,135	8,299	66,119	140,904
Net income from discontinued operations	$ 1,406	$ 951	$ 1,725	$ 2,883
Net income from continuing operations before discontinued operations (usd per share) \| $ / partnership_unit	0.25	0.13	0.57	1.24
Net income from discontinued operations (usd per share) \| $ / partnership_unit	0.00	0.01	0.01	0.03
Net Income attributable to SLGOP common unitholders (usd per share) \| $ / partnership_unit	0.40	0.09	0.70	1.53
Net income from continuing operations before discontinued operations (usd per share) \| $ / partnership_unit	0.25	0.13	0.56	1.23
Net income from discontinued operations (usd per share) \| $ / partnership_unit	0.00	0.01	0.02	0.03
Net income attributable to SLGOP common unitholders (usd per share) \| $ / partnership_unit	0.40	0.09	0.70	1.52
Dividends per unit (usd per share) \| $ / shares	$ 0.33	$ 0.25	$ 0.99	$ 0.75
Basic weighted average common units outstanding (shares) \| shares	94,780	93,561	94,389	92,117
Diluted weighted average common units and common unit equivalents outstanding (shares) \| shares	95,016	93,891	94,631	92,485

Consolidated Statements of Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Operating expenses, paid to related parties	$ 4,876	$ 4,670	$ 13,345	$ 12,914
SL Green Operating Partnership
Operating expenses, paid to related parties	$ 4,876	$ 4,670	$ 13,345	$ 12,914

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$ 45,336	$ 28,630	$ 106,921	$ 182,243
Other comprehensive income (loss):
Net unrealized gain (loss) on derivative instruments	(1,165)	(102)	10,522	(635)
Change in unrealized gain (loss) on marketable securities	513	(825)	306	(597)
Other comprehensive (loss) income	(652)	(927)	10,828	(1,232)
Comprehensive income	44,684	27,703	117,749	181,011
Net income attributable to noncontrolling interests	(4,573)	(2,973)	(12,407)	(13,201)
Other comprehensive loss (income) attributable to noncontrolling interests in the Operating Partnership	25	59	(490)	396
Comprehensive income attributable to SL Green common stockholders	40,136	24,789	104,852	168,206
SL Green Operating Partnership
Net income	45,336	28,630	106,921	182,243
Other comprehensive income (loss):
Net unrealized gain (loss) on derivative instruments	(1,165)	(102)	10,522	(635)
Change in unrealized gain (loss) on marketable securities	513	(825)	306	(597)
Other comprehensive (loss) income	(652)	(927)	10,828	(1,232)
Comprehensive income	44,684	27,703	117,749	181,011
Net income attributable to noncontrolling interests in other partnerships	(2,901)	(1,835)	(8,806)	(6,792)
Comprehensive income attributable to SL Green common stockholders	$ 41,783	$ 25,868	$ 108,943	$ 174,219

Consolidated Statement of Equity - 9 months ended Sep. 30, 2013 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In-Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interests	Series C Preferred Units Preferred Stock	Series I Preferred Units Preferred Stock
Balance at Dec. 31, 2012	$ 6,907,103	$ 950	$ 4,667,900	$ (322,858)	$ (29,587)	$ 1,701,092	$ 487,301	$ 180,340	$ 221,965
Balance (in shares) at Dec. 31, 2012		91,250,000
Increase (Decrease) in Stockholders' Equity
Net income	103,320					94,514	8,806
Other comprehensive income	10,338				10,338
Preferred dividends	(18,144)					(18,144)
DRIP proceeds	57		57
Conversion of units	17,287	$ 2	17,285
Conversion of units of the Operating Partnership to common stock (in shares)		224,000
Reallocation of noncontrolling interest in the Operating Partnership	(38,452)					(38,452)
Deferred compensation plan (shares)		10,000
Deferred compensation plan	434		655	(221)
Amortization of deferred compensation plan	19,702		19,702
Redemption of preferred stock	(192,500)					(12,160)		(180,340)
Preferred stock issuance costs	(33)								(33)
Issuance of common stock	41,791	$ 5	41,786
Issuance of common stock (in shares)		462,000
Sale of treasury stock	6,090			6,090
Sale of treasury stock (in shares)		83,000
Proceeds from stock options exercised	10,395	$ 2	10,393
Proceeds from stock options exercised (in shares)		185,000
Contributions to consolidated joint venture	3,781						3,781
Cash distributions to noncontrolling interests	(11,809)						(11,809)
Cash distribution declared ($0.66 per common share, none of which represented a return of capital for federal income tax purposes)	(90,266)					(90,266)
Balance at Sep. 30, 2013	$ 6,769,094	$ 959	$ 4,757,778	$ (316,989)	$ (19,249)	$ 1,636,584	$ 488,079	$ 0	$ 221,932
Balance (in shares) at Sep. 30, 2013		92,214,000

Consolidated Statement of Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Stockholders' Equity [Abstract]
Cash distribution declared, per common share (in dollars per share)	$ 0.33	$ 0.25	$ 0.99	$ 0.75

Consolidated Statement of Capital Statement - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Increase (Decrease) in Stockholders' Equity
Other comprehensive income	$ (652)	$ 10,828
DRIP proceeds		57
Conversion of units		17,287
Issuance of units		14,270
Deferred compensation plan		434
Amortization of deferred compensation plan		19,702
Redemption of preferred units		(192,500)
Distributions to noncontrolling interests		(11,809)
Common Stock
Increase (Decrease) in Stockholders' Equity
Conversion of units		$ 2
Conversion of units (in units)		224,000
Deferred compensation plan (shares)		10,000
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity
Distributions to noncontrolling interests		$ (11,809)
SL Green Operating Partnership
Increase (Decrease) in Stockholders' Equity
Beginning Balance		7,120,010
Net income		105,229
Other comprehensive income	(652)	10,828
Preferred distributions		(18,144)
DRIP proceeds		57
Conversion of units		0
Issuance of units		14,270
Deferred compensation plan		434
Amortization of deferred compensation plan		19,702
Redemption of preferred units		(192,500)
Preferred units issuance costs		(33)
Partners' Capital Account, Contributions		41,791
Contributions - treasury shares		6,090
Contributions - proceeds from stock options exercised		10,395
Contributions to consolidated joint venture		3,781
Distributions to noncontrolling interests		(11,809)
Cash distribution declared ($0.99 per common unit, none of which represented a return of capital for federal income tax purposes)		(92,961)
Ending Balance	7,017,140	7,017,140
SL Green Operating Partnership \| Series C Preferred Units
Increase (Decrease) in Stockholders' Equity
Beginning Balance		180,340
Net income		6,932
Preferred distributions		(6,932)
Redemption of preferred units		(180,340)
Ending Balance	0	0
SL Green Operating Partnership \| Series I Preferred Units
Increase (Decrease) in Stockholders' Equity
Beginning Balance		221,965
Net income		11,212
Preferred distributions		(11,212)
Preferred units issuance costs		(33)
Ending Balance	221,932	221,932
SL Green Operating Partnership \| Common Stock \| General Partner [Member]
Increase (Decrease) in Stockholders' Equity
Beginning Balance		$ 6,189,529
Balance (shares)		91,250,000
Net income		$ 76,370
DRIP proceeds		57
Conversion of units		$ 17,287
Conversion of units (in units)		224,000
Deferred compensation plan (shares)		10,000
Deferred compensation plan		$ 434
Amortization of deferred compensation plan		$ 19,702
Amortization of deferred compensation plan (in units)
Redemption of preferred units		$ (12,160)
Partners' Capital Account, Contributions		$ 41,791
Partners' Capital Account, Units, Contributed (in units)		462,000
Contributions - treasury shares		$ 6,090
Contributions - treasury shares (in units)		83,000
Contributions - proceeds from stock options exercised		$ 10,395
Contributions - proceeds from stock options exercised (in units)		185,000
Cash distribution declared ($0.99 per common unit, none of which represented a return of capital for federal income tax purposes)		$ (90,266)
Ending Balance	$ 6,259,229	$ 6,259,229
Balance (shares)	92,214,000	92,214,000
SL Green Operating Partnership \| Common Stock \| Limited Partner [Member]
Increase (Decrease) in Stockholders' Equity
Beginning Balance		$ 71,524
Balance (shares)		2,760,000
Net income		$ 1,909
Conversion of units		$ (17,287)
Conversion of units (in units)		(224,000)
Issuance of units		$ 14,270
Issuance of units (in units)		256,000
Cash distribution declared ($0.99 per common unit, none of which represented a return of capital for federal income tax purposes)		$ (2,695)
Ending Balance	$ 67,721	$ 67,721
Balance (shares)	2,792,000	2,792,000
SL Green Operating Partnership \| Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity
Beginning Balance		$ (30,649)
Other comprehensive income		10,828
Ending Balance	$ (19,821)	(19,821)
SL Green Operating Partnership \| Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity
Beginning Balance		487,301
Net income		8,806
Contributions to consolidated joint venture		3,781
Distributions to noncontrolling interests		(11,809)
Ending Balance	$ 488,079	$ 488,079

Consolidated Statement of Capital Consolidated Statement of Capital (Parentheticals)	9 Months Ended
	Sep. 30, 2013 $ / shares
Statement of Partners' Capital [Abstract]
Cash distribution declared, per common unit (usd per share)	$ 0.0099
Return of capital, per common unit (usd per share)	$ 0

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating Activities
Net income	$ 106,921	$ 182,243
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	264,833	249,950
Depreciable real estate reserves	2,150	0
Equity in net income from unconsolidated joint ventures	(4,251)	(80,988)
Distributions of cumulative earnings from unconsolidated joint ventures	21,723	84,182
Purchase price fair value adjustment	2,305	0
Equity in net loss (gain) on sale of interest in unconsolidated joint venture/real estate	3,937	(17,776)
Gain on sale of discontinued operations	(14,900)	(6,627)
Loan loss and other investment reserves, net of recoveries	0	564
Gain on sale of investments in marketable securities	0	(2,237)
Loss on early extinguishment of debt	10,968	0
Deferred rents receivable	(44,021)	(50,910)
Other non-cash adjustments	(31,808)	(864)
Changes in operating assets and liabilities:
Restricted cash — operations	1,254	(12,557)
Tenant and other receivables	(3,018)	(8,500)
Related party receivables	(187)	(3,792)
Deferred lease costs	(28,502)	(37,885)
Other assets	(23,316)	(44,915)
Accounts payable, accrued expenses and other liabilities	23,635	11,309
Deferred revenue and land leases payable	22,731	8,997
Net cash provided by operating activities	310,454	270,194
Investing Activities
Acquisitions of real estate property	(58,185)	(405,318)
Additions to land, buildings and improvements	(108,849)	(107,425)
Escrowed cash — capital improvements/acquisition	(246,682)	(68,692)
Investments in unconsolidated joint ventures	(120,130)	(159,524)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	19,795	48,510
Net proceeds from disposition of real estate/joint venture interest	218,701	70,367
Other investments	(26,003)	(28,911)
Debt and preferred equity and other investments, net of repayments/participations	78,888	(172,411)
Net cash used in investing activities	(242,465)	(823,404)
Financing Activities
Proceeds from mortgages and other loans payable	980,333	1,113,500
Repayments of mortgages and other loans payable	(1,027,201)	(484,518)
Proceeds from credit facility and senior unsecured notes	844,000	813,339
Repayments of credit facility and senior unsecured notes	(578,970)	(1,065,793)
Proceeds from stock options exercised and DRIP issuance	10,452	112,447
Net proceeds from sale of common stock/preferred stock	41,758	423,544
Redemption of preferred stock	(192,500)	(200,013)
Sale or purchase of treasury stock	6,089	(11,197)
Distributions to noncontrolling interests in other partnerships	(11,809)	(15,622)
Contributions from noncontrolling interests in other partnerships	3,781	19,181
Distributions to noncontrolling interests in the Operating Partnership	(2,695)	(2,385)
Dividends paid on common and preferred stock	(113,192)	(91,272)
Deferred loan costs and capitalized lease obligations	(8,921)	(33,830)
Net cash (used in) provided by financing activities	(48,875)	577,381
Net increase in cash and cash equivalents	19,114	24,171
Cash and cash equivalents at beginning of period	189,984	138,192
Cash and cash equivalents at end of period	209,098	162,363
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Issuance of common stock as deferred compensation	434	631
Issuance of units in the Operating Partnership	14,270	40,542
Redemption of units in the Operating Partnership	17,287	17,467
Derivative instruments at fair value	494	375
Assignment of debt investment to joint venture	0	25,362
Mortgage assigned upon asset sale	0	59,099
Tenant improvements and capital expenditures payable	9,855	10,056
Assumption of mortgage loans	84,642	0
Fair value adjustment to noncontrolling interest in the Operating Partnership	38,452	44,893
Accrued acquisition liabilities	0	4,372
Deferred leasing payable	2,849	509
Capital leased asset	9,992	0
Transfer to net assets held for sale	0	86,339
Transfer to liabilities related to net assets held for sale	0	62,792
Repayment of mezzanine loan	0	3,750
Redemption of Series E units	0	31,698
Repayment of financing receivable	0	28,195
Consolidation of real estate investment	90,934	0
Investment in joint venture	0	5,135
SL Green Operating Partnership
Operating Activities
Net income	106,921	182,243
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	264,833	249,950
Depreciable real estate reserves	2,150	0
Equity in net income from unconsolidated joint ventures	(4,251)	(80,988)
Distributions of cumulative earnings from unconsolidated joint ventures	21,723	84,182
Purchase price fair value adjustment	2,305	0
Equity in net loss (gain) on sale of interest in unconsolidated joint venture/real estate	3,937	(17,776)
Gain on sale of discontinued operations	(14,900)	(6,627)
Loan loss and other investment reserves, net of recoveries	0	564
Gain on sale of investments in marketable securities	0	(2,237)
Loss on early extinguishment of debt	10,968	0
Deferred rents receivable	(44,021)	(50,910)
Other non-cash adjustments	(31,808)	(864)
Changes in operating assets and liabilities:
Restricted cash — operations	1,254	(12,557)
Tenant and other receivables	(3,018)	(8,500)
Related party receivables	(187)	(3,792)
Deferred lease costs	(28,502)	(37,885)
Other assets	(23,316)	(44,915)
Accounts payable, accrued expenses and other liabilities	23,635	11,309
Deferred revenue and land leases payable	22,731	8,997
Net cash provided by operating activities	310,454	270,194
Investing Activities
Acquisitions of real estate property	(58,185)	(405,318)
Additions to land, buildings and improvements	(108,849)	(107,425)
Escrowed cash — capital improvements/acquisition	(246,682)	(68,692)
Investments in unconsolidated joint ventures	(120,130)	(159,524)
Distributions in excess of cumulative earnings from unconsolidated joint ventures	19,795	48,510
Net proceeds from disposition of real estate/joint venture interest	218,701	70,367
Other investments	(26,003)	(28,911)
Debt and preferred equity and other investments, net of repayments/participations	78,888	(172,411)
Net cash used in investing activities	(242,465)	(823,404)
Financing Activities
Proceeds from mortgages and other loans payable	980,333	1,113,500
Repayments of mortgages and other loans payable	(1,027,201)	(484,518)
Proceeds from credit facility and senior unsecured notes	844,000	813,339
Repayments of credit facility and senior unsecured notes	(578,970)	(1,065,793)
Proceeds from stock options exercised and DRIP issuance	10,452	112,447
Net proceeds from sale of common stock/preferred stock	41,758	423,544
Redemption of preferred stock	(192,500)	(200,013)
Sale or purchase of treasury stock	6,089	(11,197)
Distributions to noncontrolling interests in other partnerships	(11,809)	(15,622)
Contributions from noncontrolling interests in other partnerships	3,781	19,181
Dividends paid on common and preferred stock	(115,887)	(93,657)
Deferred loan costs and capitalized lease obligations	(8,921)	(33,830)
Net cash (used in) provided by financing activities	(48,875)	577,381
Net increase in cash and cash equivalents	19,114	24,171
Cash and cash equivalents at beginning of period	189,984	138,192
Cash and cash equivalents at end of period	209,098	162,363
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Issuance of common stock as deferred compensation	434	631
Issuance of units in the Operating Partnership	14,270	40,542
Redemption of units in the Operating Partnership	17,287	17,467
Derivative instruments at fair value	494	375
Assignment of debt investment to joint venture	0	25,362
Mortgage assigned upon asset sale	0	59,099
Tenant improvements and capital expenditures payable	9,855	10,056
Assumption of mortgage loans	84,642	0
Accrued acquisition liabilities	0	4,372
Deferred leasing payable	2,849	509
Capital leased asset	9,992	0
Transfer to net assets held for sale	0	86,339
Transfer to liabilities related to net assets held for sale	0	62,792
Repayment of mezzanine loan	0	3,750
Redemption of Series E units	0	31,698
Repayment of financing receivable	0	28,195
Consolidation of real estate investment	90,934	0
Investment in joint venture	$ 0	$ 5,135

Organization and Basis of Presentation

9 Months Ended

Sep. 30, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization and Basis of Presentation

SL Green Realty Corp., which is referred to as the Company or SL Green, a Maryland corporation, and SL Green Operating Partnership, L.P., which is referred to as SLGOP or the Operating Partnership, a Delaware limited partnership, were formed in June 1997 for the purpose of combining the commercial real estate business of S.L. Green Properties, Inc. and its affiliated partnerships and entities. The Operating Partnership received a contribution of interest in the real estate properties, as well as 95% of the economic interest in the management, leasing and construction companies, which are referred to as the Service Corporation, a consolidated variable interest entity. All of the management, leasing and construction services with respect to the properties that are wholly-owned by us are conducted through SL Green Management LLC which is 100% owned by the Operating Partnership. The Company has qualified, and expects to qualify in the current fiscal year, as a real estate investment trust, or REIT, under the Internal Revenue Code of 1986, as amended, or the Code, and operates as a self-administered, self-managed REIT. A REIT is a legal entity that holds real estate interests and, through payments of dividends to stockholders, is permitted to minimize the payment of Federal income taxes at the corporate level. Unless the context requires otherwise, all references to “we,” “our” and “us” means the Company and all entities owned or controlled by the Company, including the Operating Partnership.

Substantially all of our assets are held by, and our operations are conducted through, the Operating Partnership. The Company is the sole managing general partner of the Operating Partnership. As of September 30, 2013, noncontrolling investors held, in the aggregate, a 2.94% limited partnership interest in the Operating Partnership. We refer to these interests as the noncontrolling interests in the Operating Partnership. See Note 11, “Noncontrolling Interests on the Company's Consolidated Financial Statements.”

Reckson Associates Realty Corp., or Reckson, and Reckson Operating Partnership, L.P., or ROP, are wholly-owned subsidiaries of the Operating Partnership.

As of September 30, 2013, we owned the following interests in commercial office properties in the New York Metropolitan area, primarily in midtown Manhattan, a borough of New York City. Our investments in the New York Metropolitan area also include investments in Brooklyn, Long Island, Westchester County, Connecticut and Northern New Jersey, which are collectively known as the Suburban assets:



Location	Ownership	Number of Properties	Square Feet	Weighted Average Occupancy(1)
Manhattan	Consolidated properties	26	18,012,945	93.8	%
	Unconsolidated properties	9	5,934,434	96.2	%

Suburban	Consolidated properties	26	4,087,400	79.1	%
	Unconsolidated properties	4	1,222,100	85.3	%
		65	29,256,879	91.9	%

_________________________________


(1)	The weighted average occupancy represents the total leased square feet divided by total available rentable square feet.

As of September 30, 2013, we also owned investments in 16 retail properties encompassing approximately 621,300 square feet, 13 development properties encompassing approximately 2,424,600 square feet, three residential properties encompassing 468 units (approximately 497,100 square feet), two land interests encompassing approximately 961,400 square feet and 28 west coast office properties encompassing approximately 3,654,300 square feet. In addition, we manage two office properties owned by third parties and affiliated companies encompassing approximately 626,400 rentable square feet. As of September 30, 2013, we also held debt and preferred equity investments with a book value of $1.3 billion.

Partnership Agreement

In accordance with the partnership agreement of the Operating Partnership, or the Operating Partnership Agreement, we allocate all distributions and profits and losses in proportion to the percentage ownership interests of the respective partners. As the managing general partner of the Operating Partnership, we are required to take such reasonable efforts, as determined by us in our sole discretion, to cause the Operating Partnership to distribute sufficient amounts to enable the payment of sufficient dividends by us to minimize any Federal income or excise tax at the Company level. Under the Operating Partnership Agreement, each limited partner has the right to redeem units of limited partnership interests for cash, or if we so elect, for shares of our common stock on a one-for-one basis.

Basis of Quarterly Presentation

The accompanying unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by accounting principles generally accepted in the United States for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for the fair presentation of the financial position of the Company and the Operating Partnership at September 30, 2013 and the results of operations for the periods presented have been included. The 2013 operating results for the period presented are not necessarily indicative of the results that may be expected for the year ending December 31, 2013. These financial statements should be read in conjunction with the financial statements and accompanying notes included in the Annual Reports on Form 10-K for the year ended December 31, 2012 of the Company and the Operating Partnership.

The balance sheets at December 31, 2012 have been derived from the audited financial statements at that date but does not include all the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References

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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Significant Accounting Policies

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Significant Accounting Policies

Principles of Consolidation

The consolidated financial statements include our accounts and those of our subsidiaries, which are wholly-owned or controlled by us. Entities which we do not control through our voting interest and entities which are variable interest entities, but where we are not the primary beneficiary, are accounted for under the equity method or as debt and preferred equity investments. See Note 5, “Debt and Preferred Equity Investments” and Note 6, “Investments in Unconsolidated Joint Ventures.” All significant intercompany balances and transactions have been eliminated.

We consolidate variable interest entities, or VIEs, in which we are considered the primary beneficiary. The primary beneficiary of a VIE is the entity that has (i) the power to direct the activities that most significantly impact the entity’s economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE. Included in commercial real estate properties on our consolidated balance sheets as of September 30, 2013 and December 31, 2012 are approximately $600.1 million and $607.4 million, respectively, related to our consolidated VIEs. Included in mortgages and other loans payable on our consolidated balance sheets as of September 30, 2013 and December 31, 2012 are approximately $373.1 million and $379.6 million, respectively, related to our consolidated VIEs.

A noncontrolling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to a parent. Noncontrolling interests are required to be presented as a separate component of equity in the consolidated balance sheet and the presentation of net income was modified to present earnings and other comprehensive income attributed to controlling and noncontrolling interests.

We assess the accounting treatment for each joint venture and debt and preferred equity investment. This assessment includes a review of each joint venture or limited liability company agreement to determine which party has what rights and whether those rights are protective or participating. For all VIE’s, we review such agreements in order to determine which party has the power to direct the activities that most significantly impact the entity’s economic performance. In situations where we and our partner approves, among other things, the annual budget, receives a detailed monthly reporting package from us, meets on a quarterly basis to review the results of the joint venture, reviews and approves the joint venture’s tax return before filing, and approves all leases that cover more than a nominal amount of space relative to the total rentable space at each property, we do not consolidate the joint venture as we consider these to be substantive participation rights that result in shared power of the activities that most significantly impact the performance of our joint venture. Our joint venture agreements typically contain certain protective rights such as the requirement of partner approval to sell, finance or refinance the property and the payment of capital expenditures and operating expenditures outside of the approved budget or operating plan.

Investment in Commercial Real Estate Properties

On a periodic basis, we assess whether there are any indications that the value of our real estate properties may be impaired or that their carrying value may not be recoverable. A property’s value is considered impaired if management’s estimate of the aggregate future cash flows (undiscounted and without interest charges for consolidated properties) to be generated by the property is less than the carrying value of the property. To the extent impairment has occurred, the loss will be measured as the excess of the carrying amount of the property over the calculated fair value of the property. We also evaluate our real estate properties for potential impairment when a real estate property has been classified as held for sale. Real estate assets held for sale are valued at the lower of their carrying value or fair value less costs to sell. In June 2013, we recorded a $2.2 million impairment charge in connection with the sale of 300 Main Street in Stamford, Connecticut.

We assess our investments in unconsolidated joint ventures for recoverability, and if it is determined that a loss in value of the investment is other than temporary, we write down the investment to its fair value. We evaluate our equity investments for impairment based on the joint venture’s projected discounted cash flows. We do not believe that the values of any of our consolidated properties or equity investments were impaired at either September 30, 2013 or December 31, 2012.

When we acquire equity interests in an existing unconsolidated joint venture and gain control over the investment, we record the consolidated investment at fair value. The difference between the book value of our equity investment on the purchase date and our share of the fair value of the investment’s purchase price is recorded as a purchase price fair value adjustment in our consolidated statements of income. In April 2013, we recognized a purchase price fair value adjustment of $(2.3) million in connection with the consolidation of 16 Court Street, which was previously accounted for as an investment in unconsolidated joint venture.

We allocate the purchase price of real estate to land and building (inclusive of tenant improvements) and, if determined to be material, intangibles, such as the value of above- and below-market leases and origination costs associated with the in-place leases. We depreciate the amount allocated to building (inclusive of tenant improvements) and other intangible assets over their estimated useful lives, which generally range from three to 40 years and from one to 14 years, respectively. The values of the above- and below-market leases are amortized and recorded as either an increase (in the case of below-market leases) or a decrease (in the case of above-market leases) to rental income over the remaining term of the associated lease, which generally range from one to 14 years. The value associated with in-place leases is amortized over the expected term of the associated lease, which generally ranges from one to 14 years. If a tenant vacates its space prior to the contractual termination of the lease and no rental payments are being made on the lease, any unamortized balance of the related intangible will be written off. The tenant improvements and origination costs are amortized as an expense over the remaining life of the lease (or charged against earnings if the lease is terminated prior to its contractual expiration date). We assess fair value of the leases based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including the historical operating results, known trends, and market/economic conditions that may affect the property. To the extent acquired leases contain fixed rate renewal options that are below market and determined to be material, we amortize such below market lease value into rental income over the renewal period.

We recognized a decrease approximately $1.5 million in rental revenue for the three months ended September 30, 2013 for the amortization of aggregate above-market leases and reductions in lease origination costs in excess of below-market leases, which included approximately $6.8 million resulting from a write-off of above-market and in-place lease balances associated with a former tenant. Excluding this non-recurring charge, we recognized an increase of approximately $5.3 million in rental revenue for the three months ended September 30, 2013 for the amortization of aggregate below-market leases in excess of above-market leases and reductions in lease origination costs. We recognized an increase of approximately $8.5 million, $2.6 million and $7.4 million in rental revenue for the nine months ended September 30, 2013 and the three and nine months ended September 30, 2012, respectively, for the amortization of aggregate below-market leases in excess of above-market leases and reductions in lease origination costs.We recognized a reduction in interest expense for the amortization of the above-market rate mortgages assumed of approximately $1.3 million, $4.0 million, $1.3 million and $0.7 million for the three and nine months ended September 30, 2013 and 2012, respectively.

The following summarizes our identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases) as of September 30, 2013 and December 31, 2012 (in thousands):



	September 30, 2013			December 31, 2012
Identified intangible assets (included in other assets):
Gross amount	$	732,160		$	725,861
Accumulated amortization	(325,224		)	(263,107		)
Net	$	406,936		$	462,754

Identified intangible liabilities (included in deferred revenue):
Gross amount	$	667,495		$	651,921
Accumulated amortization	(411,814		)	(357,225		)
Net	$	255,681		$	294,696

Investment in Marketable Securities

We invest in marketable securities. At the time of purchase, we are required to designate a security as held-to-maturity, available-for-sale, or trading depending on ability and intent. We do not have any securities designated as held-to-maturity or trading at this time. Securities available-for-sale are reported at fair value pursuant to ASC 820-10, with the net unrealized gains or losses reported as a component of accumulated other comprehensive loss.

The cost of bonds and marketable securities sold was determined using the specific identification method.

At September 30, 2013 and December 31, 2012, we held the following marketable securities (in thousands):



	September 30, 2013		December 31, 2012
Level 1 – Equity marketable securities	$	3,109	$	2,202
Level 2 – Commercial mortgage-backed securities	26,346		15,575
Level 3 – Rake bonds	3,408		3,652
Total marketable securities available-for-sale	$	32,863	$	21,429

Our equity marketable securities represent our investment in Gramercy Capital Corp., which was renamed Gramercy Property Trust Inc. (NYSE: GPT), or Gramercy, in April 2013. Marc Holliday, our chief executive officer, remains a board member of Gramercy. As we no longer have any significant influence over Gramercy, we account for our investment as available-for-sale securities.

The cost basis of the Level 3 securities was $3.6 million and $3.7 million at September 30, 2013 and December 31, 2012, respectively. There were no sales of Level 3 securities during the three and nine months ended September 30, 2013. The Level 3 securities mature at various times through 2030.

Revenue Recognition

Rental revenue is recognized on a straight-line basis over the term of the lease. Rental revenue recognition commences when the tenant takes possession or controls the physical use of the leased space. In order for the tenant to take possession, the leased space must be substantially ready for its intended use. To determine whether the leased space is substantially ready for its intended use, management evaluates whether we are or the tenant is the owner of tenant improvements for accounting purposes. When management concludes that we are the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of the finished space, which is when such tenant improvements are substantially complete. In certain instances, when management concludes that we are not the owner (the tenant is the owner) of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space. When management concludes that we are the owner of tenant improvements for accounting purposes, management records amounts funded to construct the tenant improvements as a capital asset. For these tenant improvements, management records amounts reimbursed by tenants as a reduction of the capital asset. When management concludes that the tenant is the owner of tenant improvements for accounting purposes, management records our contribution towards those improvements as a lease incentive, which is included in deferred leasing costs on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the lease. The excess of rents recognized over amounts contractually due pursuant to the underlying leases are included in deferred rents receivable on the accompanying consolidated balance sheets. We establish, on a current basis, an allowance for future potential tenant credit losses, which may occur against this account. The balance reflected on the consolidated balance sheets is net of such allowance.

In addition to base rent, our tenants also generally will pay their pro rata share of increases in real estate taxes and operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in building operating expenses, the tenant will pay additional rent based upon increases in the wage rate paid to porters over the porters’ wage rate in effect during a base year or increases in the consumer price index over the index value in effect during a base year. In addition, many of our leases contain fixed percentage increases over the base rent to cover escalations. Electricity is most often supplied by the landlord either on a sub-metered basis, or rent inclusion basis (i.e., a fixed fee is included in the rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services other than electricity (such as heat, air conditioning and freight elevator service during business hours, and base building cleaning) are typically provided at no additional cost, with the tenant paying additional rent only for services which exceed base building services or for services which are provided outside normal business hours. These escalations are based on actual expenses incurred in the prior calendar year. If the expenses in the current year are different from those in the prior year, then during the current year, the escalations will be adjusted to reflect the actual expenses for the current year.

We record a gain on sale of real estate when title is conveyed to the buyer, subject to the buyer’s financial commitment being sufficient to provide economic substance to the sale and we have no substantial economic involvement with the buyer.

Interest income on debt and preferred equity investments is recognized over the life of the investment using the effective interest method and recognized on the accrual basis. Fees received in connection with loan commitments are deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Anticipated exit fees, whose collection is expected, are also recognized over the term of the loan as an adjustment to yield. Fees on commitments that expire unused are recognized at expiration.

Income recognition is generally suspended for debt and preferred equity investments at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of interest income and principal becomes doubtful. Interest income recognition is resumed when the loan becomes contractually current and performance is demonstrated to be resumed. Interest is recorded as income on impaired loans only to the extent cash is received. Several of the debt and preferred equity investments provide for accrual of interest at specified rates, which differ from current payment terms. Interest is recognized on such loans at the accrual rate subject to management’s determination that accrued interest and outstanding principal are ultimately collectible, based on the underlying collateral and operations of the borrower. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt.

If we purchase a debt or preferred equity investment at a discount, intend to hold it until maturity and expect to recover the full value of the investment, we accrete the discount into income as an adjustment to yield over the term of the investment. If we purchase a debt or preferred equity investment at a discount with the intention of foreclosing on the collateral, we do not accrete the discount.

Reserve for Possible Credit Losses

The expense for possible credit losses in connection with debt and preferred equity investments is the charge to earnings to increase the allowance for possible credit losses to the level that we estimate to be adequate, based on Level 3 data, considering delinquencies, loss experience and collateral quality. Other factors considered relate to geographic trends and product diversification, the size of the portfolio and current economic conditions. Based upon these factors, we establish the provision for possible credit losses on each individual investment. When it is probable that we will be unable to collect all amounts contractually due, the investment is considered impaired.

Where impairment is indicated on an investment that is held to maturity, a valuation allowance is measured based upon the excess of the recorded investment amount over the net fair value of the collateral. Any deficiency between the carrying amount of an asset and the calculated value of the collateral is charged to expense. The write-off of the reserve balance is called a charge off. We continue to assess or adjust our estimates based on circumstances of a loan and the underlying collateral. If the additional information obtained reflects increased recovery of our investment, we will adjust our reserves accordingly.

We recorded no loan loss reserves during the three and nine months ended September 30, 2013. During the three and nine months ended September 30, 2012, we recorded loan loss reserves of zero and $3.0 million, respectively, on investments being held to maturity and approximately zero and $2.4 million, respectively, in recoveries in connection with the sale of our investments. This is included in loan loss and other investment reserves, net of recoveries in the accompanying consolidated statements of income.

Debt and preferred equity investments held for sale are carried at the lower of cost or fair market value using available market information obtained through consultation with dealers or other originators of such investments as well as discounted cash flow models based on Level 3 data pursuant to ASC 820-10. As circumstances change, management may conclude not to sell an investment designated as held for sale. In such situations, the investment will be reclassified at its net carrying value to debt and preferred equity investments held to maturity. For these reclassified investments, the difference between the current carrying value and the expected cash to be collected at maturity will be accreted into income over the remaining term of the investment.

Income Taxes

SL Green is taxed as a REIT under Section 856(c) of the Code. As a REIT, SL Green generally is not subject to Federal income tax. To maintain its qualification as a REIT, SL Green must distribute at least 90% of its REIT taxable income to its stockholders and meet certain other requirements. If SL Green fails to qualify as a REIT in any taxable year, we will be subject to Federal income tax on SL Green's taxable income at regular corporate rates. SL Green may also be subject to certain state, local and franchise taxes. Under certain circumstances, Federal income and excise taxes may be due on SL Green's undistributed taxable income.

The Operating Partnership is a partnership and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective income tax returns. The only provision for income taxes in the accompanying consolidated financial statements relates to the Operating Partnership’s consolidated taxable REIT subsidiaries. We may also be subject to certain state, local and franchise taxes.

Pursuant to amendments to the Code that became effective January 1, 2001, we have elected, and may elect in the future, to treat certain of our existing or newly created corporate subsidiaries as taxable REIT subsidiaries, or a TRS. In general, our TRSs may perform non-customary services for our tenants, hold assets that we cannot hold directly and generally may engage in any real estate or non-real estate related business. Our TRSs generate income, resulting in Federal and state income tax liability for these entities.

During the three and nine months ended September 30, 2013, we recorded Federal, state and local tax provisions of $2.1 million and $6.0 million, respectively. During the three and nine months ended September 30, 2012, we recorded Federal, state and local tax provisions of zero and less than $0.1 million, respectively.

We follow a two-step approach for evaluating uncertain tax positions. Recognition (step one) occurs when an enterprise concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be sustained upon examination. Measurement (step two) determines the amount of benefit that is more-likely-than-not to be realized upon settlement. Derecognition of a tax position that was previously recognized would occur when a company subsequently determines that a tax position no longer meets the more-likely-than-not threshold of being sustained. The use of a valuation allowance as a substitute for derecognition of tax positions is prohibited.

Stock-Based Employee Compensation Plans

We have a stock-based employee compensation plan, described more fully in Note 14, “Share-based Compensation.”

Our stock options are recorded at fair value at the time of issuance. Fair value of the stock options is determined using the Black-Scholes option-pricing model. The Black-Scholes model was developed for use in estimating the fair value of traded options, which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our plan has characteristics significantly different from those of traded options and because changes in the subjective input assumptions can materially affect the fair value estimate, in our opinion, the existing models do not necessarily provide a reliable single measure of the fair value of our employee stock options.

Compensation cost for stock options, if any, is recognized ratably over the vesting period of the award. Our policy is to grant options with an exercise price equal to the quoted closing market price of our common stock on the grant date. Awards of stock or restricted stock are expensed as compensation over the benefit period based on the fair value of the stock on the grant date.

For share-based awards with a performance or market measure, we recognize compensation cost over the requisite service period, using the accelerated attribution expense method. The requisite service period begins on the date the compensation committee of our board of directors authorizes the award, adopts any relevant performance measures and communicates the award to the employees. For programs with performance measures, the total estimated compensation cost is based on the fair value of the award at the applicable reporting date estimated using a binomial model. For share-based awards for which there is no pre-established performance measure, we recognize compensation cost over the service vesting period, which represents the requisite service period, on a straight-line basis. In accordance with the provisions of our share-based incentive compensation plans, we accept the return of shares of Company common stock, at the current quoted market price, from certain key employees to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period.

Awards can also be made in the form of a separate series of units of limited partnership interest in the Operating Partnership called long-term incentive plan units, or LTIP Units. LTIP Units, which can be granted either as free-standing awards or in tandem with other awards under our stock incentive plan, are valued by reference to the value of the Company's common stock at the time of grant, and are subject to such conditions and restrictions as the compensation committee of the Company's board of directors may determine, including continued employment or service, computation of financial metrics and/or achievement of pre-established performance goals and objectives.

Earnings per Share of the Company

The Company presents both basic and diluted earnings per share, or EPS. Basic EPS excludes dilution and is computed by dividing net income attributable to common stockholders by the weighted average number of common stock outstanding during the period. Basic EPS includes participating securities, consisting of unvested restricted stock that receive nonforfeitable dividends similar to shares of common stock. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount. Diluted EPS also includes units of limited partnership interest. The dilutive effect of stock options is reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method. There is no dilutive effect for the exchangeable senior debentures as the conversion premium will be paid in cash.

Earnings per Unit of the Operating Partnership

The Operating Partnership presents both basic and diluted earnings per unit, or EPU. Basic EPU excludes dilution and is computed by dividing net income attributable to common unitholders by the weighted average number of common units outstanding during the period. Basic EPU includes participating securities, consisting of unvested restricted units that receive nonforfeitable dividends similar to shares of common units. Diluted EPU reflects the potential dilution that could occur if securities or other contracts to issue common units were exercised or converted into common units, where such exercise or conversion would result in a lower EPU amount. The dilutive effect of unit options is reflected in the weighted average diluted outstanding units calculation by application of the treasury stock method. There is no dilutive effect for the exchangeable senior notes as the conversion premium will be paid in cash.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Concentrations of Credit Risk

Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash investments, debt and preferred equity investments and accounts receivable. We place our cash investments in excess of insured amounts with high quality financial institutions. The collateral securing our debt and preferred equity investments is located in the New York Metropolitan area. See Note 5, “Debt and Preferred Equity Investments.” We perform ongoing credit evaluations of our tenants and require most tenants to provide security deposits or letters of credit. Though these security deposits and letters of credit are insufficient to meet the total value of a tenant’s lease obligation, they are a measure of good faith and a source of funds to offset the economic costs associated with lost rent and the costs associated with re-tenanting the space. Although the properties in our real estate portfolio are primarily located in Manhattan, we also have Suburban properties located in Brooklyn, Long Island, Westchester County, Connecticut, Northern New Jersey and the west coast. The tenants located in our buildings operate in various industries. Other than three tenants who account for approximately 7.3%, 6.5% and 6.0% of our share of annualized cash rent, no other tenant in our portfolio accounted for more than 2.0% of our annualized cash rent, including our share of joint venture annualized cash rent for the three months ended September 30, 2013. Approximately 10%, 7% and 6% of our annualized cash rent for consolidated properties for the three months ended September 30, 2013 was attributable to 1515 Broadway, 1185 Avenue of the Americas and One Madison Avenue, respectively. In addition, one debt and preferred equity investment accounted for more than 10% of the income earned on debt and preferred equity investments during the three months ended September 30, 2013.

Reclassification

Certain prior year balances have been reclassified to conform to our current year presentation primarily in order to eliminate discontinued operations from income from continuing operations and to reclassify deferred origination fees from deferred income to debt and preferred equity investments.

Accounting Standards Updates

In February 2013, the FASB issued guidance on the presentation and disclosure of reclassification adjustments out of accumulated other comprehensive income, or AOCI. The standard requires an entity to present information about significant items reclassified out of AOCI by component either on the face of the statement where net income is presented or as a separate disclosure in the notes to financial statements. The guidance became effective for calendar year-end public companies beginning in the first quarter of 2013 and its adoption did not have a material impact on our consolidated financial statements.

Property Acquisitions

9 Months Ended

Sep. 30, 2013

Business Combinations [Abstract]

Property Acquisitions

In April 2013, we acquired interests from our joint venture partner, City Investment Fund, or CIF, in 16 Court Street for $4.0 million. We have consolidated the ownership of the 318,000 square foot building. The transaction valued the consolidated interest at $96.2 million, inclusive of the $84.7 million mortgage encumbering the property. We recognized a purchase price fair value adjustment of $(2.3) million upon the closing of this transaction. This property, which we initially acquired in July 2007, was previously accounted for as an investment in unconsolidated joint ventures. We are currently in the process of analyzing the purchase price allocation and, as such, we have not allocated any value to intangible assets such as above- and below-market lease or in-place leases.

In March 2013, we, along with Magnum Real Estate Group, acquired 84 residential apartment units, consisting of 72 apartment units and 12 townhouses, located at 248-252 Bedford Avenue, Williamsburg, Brooklyn for $54.9 million. Simultaneous with the closing, the joint venture closed on a five-year $22.0 million mortgage loan which carries a floating rate of interest of 225 basis points over LIBOR. The property is above a commercial property already owned by us. We hold a 90% controlling interest in this joint venture.

The following summarizes our allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of this acquisition (in thousands):



	248-252 Bedford Avenue
Land	$	10,865
Building and building leasehold	44,035
Above market lease value	—
Acquired in-place leases	—
Other assets, net of other liabilities	—
Assets acquired	54,900

Fair value adjustment to mortgage note payable	—
Below market lease value	—
Liabilities assumed	—

Purchase price allocation	$	54,900

Net consideration funded by us at closing, excluding consideration financed by debt	$	21,782
Equity and/or debt investment held	$	—
Debt assumed	$	—

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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Reference 16: http://www.xbrl.org/2003/role/presentationRef
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Reference 18: http://www.xbrl.org/2003/role/presentationRef
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Reference 19: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Property Dispositions

9 Months Ended

Sep. 30, 2013

Discontinued Operations and Disposal Groups [Abstract]

Property Dispositions and Assets Held for Sale

Property Dispositions

In September 2013, we sold the property located at 300 Main Street, Stamford, Connecticut for $13.5 million. We recorded a $2.2 million impairment charge in the second quarter of 2013.

In August 2013, we sold the property located at 333 West 34th, New York, New York for $220.3 million. We recognized a gain of $13.8 million on the sale. The $211.0 million net proceeds from the sale of this property are temporarily being held at a qualified intermediary, at our direction, for the purpose of facilitating a Section 1031 Like-Kind Exchange, and, as such, are included in restricted cash on the consolidated balance sheets at September 30, 2013.

In February 2013, we, along with our joint venture partner, sold our property located at 44 West 55th Street for $6.3 million. We recognized a gain of $1.1 million on the sale.

Discontinued operations included the results of operations of real estate assets under contract or sold prior to September 30, 2013. This included 300 Main Street, which was sold in September 2013, 333 West 34th Street, which was sold in August 2013, 44 West 55th Street, which was sold in February 2013 and 292 Madison Avenue, which was sold in February 2012.

The following table summarizes income from discontinued operations for the three and nine months ended September 30, 2013 and 2012, respectively (in thousands):



	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013		2012
Revenues
Rental revenue	$	1,696		$	5,446		$	10,656	$	13,872
Escalation and reimbursement revenues	683			611			1,292		1,778
Other income (loss)	1			(376		)	8		(376		)
Total revenues	2,380			5,681			11,956		15,274
Operating expenses	660			2,065			3,643		4,930
Real estate taxes	187			302			765		916
Interest expense, net of interest income	130			696			461		1,627
Depreciable real estate reserves	—			—			2,150		—
Transaction related costs	(3		)	65			—		160
Depreciation and amortization	—			1,602			3,212		4,758
Total expenses	974			4,730			10,231		12,391
Net income from discontinued operations	$	1,406		$	951		$	1,725	$	2,883

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1012-107759

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43-48
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Debt and Preferred Equity Investments

9 Months Ended

Sep. 30, 2013

Investments, Debt and Equity Securities [Abstract]

Debt and Preferred Equity Investments

During the nine months ended September 30, 2013 and 2012, our debt and preferred equity investments (net of discounts and deferred origination fees) increased approximately $497.4 million and $374.0 million, respectively, due to originations, purchases, accretion of reserves and discounts and paid-in-kind interest. We recorded repayments, participations and sales of approximately $530.2 million and $288.3 million, respectively, and loan loss reserves of zero and $3.0 million during the nine months ended September 30, 2013 and 2012, respectively, which offset the increases in debt and preferred equity investments.

Debt Investments

As of September 30, 2013 and December 31, 2012, we held the following debt investments with an aggregate weighted average current yield of approximately 11.3% at September 30, 2013 (in thousands):



Loan Type	September 30, 2013 Senior Financing		September 30, 2013 Carrying Value, Net of Discounts and Deferred Origination Fees			December 31, 2012 Carrying Value, Net of Discounts and Deferred Origination Fees			Initial Maturity Date
Other Loan	$	398,500	$	14,837		$	—		March 2015
Mezzanine Loan	205,000		67,740			66,307			February 2016
Mortgage/Mezzanine Loan	167,355		44,549			44,013			May 2016
Mezzanine Loan	177,000		15,226			15,906			May 2016
Junior Participation	133,000		49,000			49,000			June 2016
Mezzanine Loan	165,000		71,254			70,967			November 2016
Mortgage/Mezzanine Loan(1)	1,109,000		78,268			115,804			March 2017
Other Loan	15,000		3,500			3,500			September 2021
Mortgage(2)	—		—			218,068			—
Total fixed rate	$	2,369,855	$	344,374		$	583,565
Mortgage Loan	—		29,912			—			December 2013
Junior Participation(3)	57,750		10,869			10,869			February 2014
Junior Participation(4)	80,932		23,953			—			February 2014
Mortgage/Mezzanine Loan	330,000		131,595			131,231			July 2014
Mezzanine Loan(5)	62,500		37,394			37,288			July 2014
Mezzanine Loan	180,000		59,852			59,739			August 2014
Mortgage	—		14,855			14,745			September 2014
Mezzanine Loan(6)	87,374		37,365			34,444			October 2014
Mortgage/Mezzanine Loan(7)	—		53,258			47,253			February 2015
Mezzanine Loan	110,000		48,991			—			September 2015
Mezzanine Loan(8)	92,711		27,772			55,336			December 2015
Mezzanine Loan	775,000		72,585			—			March 2016
Mezzanine Loan(9)	160,000		22,515			7,624			June 2016
Mezzanine Loan	87,300		25,580			34,761			July 2016
Mortgage/Mezzanine Loan	72,000		20,558			—			July 2018
Total floating rate	$	2,095,567	$	617,054		$	433,290
Total	4,465,422		961,428			1,016,855
Loan loss reserve(10)			(4,000		)	(7,000		)
			$	957,428		$	1,009,855

_________________________________

(1)

Interest is added to the principal balance for this accrual only loan. In January 2013, we sold 50% of the mezzanine loan for $57.8 million and recognized additional income of $12.9 million, which is included in investment and preferred equity income on the consolidated statements of income. The unaccrued interest during the period in which the loan was on non-accrual status is being accreted as of January 2013.


(2)	In connection with the repayment of the loan in May 2013, we recognized additional income of $6.4 million, which is included in investment and preferred equity income on our consolidated statements of income.


(3)	In June 2013, the loan was extended to February 2014, subject to an additional four-month extension option.


(4)	As of September 30, 2013, we were committed to fund an additional $0.9 million in connection with this loan.


(5)	As a result of the transfer not meeting the conditions for sale accounting, the $5.0 million portion of the outstanding loan that was participated out has been recorded in other liabilities in the accompanying consolidated balance sheets.


(6)	As of September 30, 2013, we were committed to fund an additional $12.3 million in connection with this loan.


(7)	As of September 30, 2013, we were committed to fund an additional $5.2 million in connection with this loan.


(8)	We funded $56.3 million at origination. In June 2013, we sold 50% of our interest in the $85.0 million mezzanine loan. As of September 30, 2013, we were committed to fund an additional $13.6 million in connection with our share of this loan.

(9)

As part of the refinancing of the related senior mortgage in June 2013, we originated a $30.0 million mezzanine loan and our previous investment in the amount of $15.0 million, including the $7.4 million participated interest, was repaid in full. Following the refinancing, we entered into a loan participation agreement in the amount of $7.4 million on this $30.0 million mezzanine loan. Due to our continued involvement with the loan, the portion that was participated out has been recorded in other assets and other liabilities in the accompanying consolidated balance sheets.


(10)	Loan loss reserves are specifically allocated to investments. Our reserves reflect management's judgment of the probability and severity of losses based on Level 3 data. We cannot be certain that our judgment will prove to be correct or that reserves will be adequate over time to protect against potential future losses.

Preferred Equity Investments

As of September 30, 2013 and December 31, 2012, we held the following preferred equity investments, with an aggregate weighted average current yield of approximately 10.9% at September 30, 2013 (in thousands):



Type	September 30, 2013 Senior Financing		September 30, 2013 Carrying Value, Net of Discounts and Deferred Origination Fees		December 31, 2012 Carrying Value, Net of Discounts and Deferred Origination Fees		Initial Mandatory Redemption
Preferred equity	$	70,000	$	9,937	$	9,927	October 2014
Preferred equity(1)(2)	525,000		107,723		99,768		July 2015
Preferred equity(1)(3)	55,986		24,426		18,925		April 2016
Preferred equity(1)	926,260		216,037		209,959		July 2016
	$	1,577,246	$	358,123	$	338,579

_________________________________


(1)	The difference between the pay and accrual rates is included as an addition to the principal balance outstanding.


(2)	The reserve previously taken against this loan is being accreted up to the face amount through the maturity date. In June 2013, the redemption date was extended from July 2014 to July 2015.


(3)	As of September 30, 2013, we were committed to fund an additional $1.4 million on this loan.

The following table is a rollforward of our total loan loss reserves at September 30, 2013 and December 31, 2012 (in thousands):



	September 30, 2013			December 31, 2012
Balance at beginning of year	$	7,000		$	50,175
Expensed	—			3,000
Recoveries	—			(2,436		)
Charge-offs and reclassifications	(3,000		)	(43,739		)
Balance at end of period	$	4,000		$	7,000

At September 30, 2013 and December 31, 2012, all debt and preferred equity investments, other than as noted above, were performing in accordance with the terms of the loan agreements.

We have determined that we have one portfolio segment of financing receivables at September 30, 2013 and December 31, 2012, comprising commercial real estate, which is primarily recorded in debt and preferred equity investments. Included in other assets is an additional amount of financing receivables totaling approximately $145.8 million at September 30, 2013 and $121.3 million at December 31, 2012. No financing receivables were 90 days past due or on non-accrual status at September 30, 2013.

The following table presents impaired loans, which may include non-accrual loans, as of September 30, 2013 and December 31, 2012, respectively (in thousands):



	September 30, 2013						December 31, 2012
	Unpaid Principal Balance		Recorded Investment		Allowance Allocated		Unpaid Principal Balance		Recorded Investment		Allowance Allocated
With no related allowance recorded:
Commercial real estate	$	—	$	—	$	—	$	—	$	—	$	—
With an allowance recorded:
Commercial real estate	10,750		10,750		4,000		10,750		10,750		7,000

Total	$	10,750	$	10,750	$	4,000	$	10,750	$	10,750	$	7,000

The following table presents the average recorded investment in impaired loans, which may include non-accrual loans and the related investment and preferred equity income recognized during the three and nine months ended September 30, 2013 and 2012, respectively (in thousands):



	Three Months Ended September 30,					Nine Months Ended September 30,
	2013		2012			2013		2012
Average recorded investment in impaired loans	$	10,890	$	40,304		$	10,877	$	63,391

Investment and preferred equity income recognized	3,316		(298		)	3,804		3,480

On an ongoing basis, we monitor the credit quality of our financing receivables based on payment activity. We assess credit quality indicators based on the underlying collateral.

- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-Glossary Debt Security
-URI http://asc.fasb.org/extlink&oid=6509901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 3, 19, 20, 21, 22, 137
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Investments in Unconsolidated Joint Ventures

9 Months Ended

Sep. 30, 2013

Equity Method Investments and Joint Ventures [Abstract]

Investments in Unconsolidated Joint Ventures

We have investments in several real estate joint ventures with various partners, including SITQ Immobilier, a subsidiary of Caisse de depot et placement du Quebec, or SITQ, Canada Pension Plan Investment Board, or CPPIB, Prudential Real Estate Investors, or Prudential, Onyx Equities, or Onyx, The Witkoff Group, or Witkoff, Credit Suisse Securities (USA) LLC, or Credit Suisse, Jeff Sutton, or Sutton, Harel Insurance and Finance, or Harel, Louis Cappelli, or Cappelli, The Moinian Group, or Moinian, Vornado Realty Trust (NYSE: VNO), or Vornado, Blackstone Real Estate Partners VII, or Blackstone, Plaza Global Real Estate Partners LP, or Plaza, Angelo Gordon Real Estate Inc., or AG, as well as private investors. All the investments below are voting interest entities, except for 33 Beekman, 3 Columbus Circle and 180/182 Broadway which are VIEs in which we are not the primary beneficiary. Our net equity investment in these three VIEs was $136.7 million and $117.7 million at September 30, 2013 and December 31, 2012, respectively. As we do not control the joint ventures listed below, we account for them under the equity method of accounting.

The table below provides general information on each of our joint ventures as of September 30, 2013 (amounts in thousands):



Property	Partner	Ownership Interest		Economic Interest		Square Feet	Acquired	Acquisition Price(1)
100 Park Avenue	Prudential	49.90	%	49.90	%	834	January 2000	$	95,800
21 West 34th Street	Sutton	50.00	%	50.00	%	30	July 2005	22,400
1604-1610 Broadway(2)	Onyx	70.00	%	70.00	%	30	November 2005	4,400
27-29 West 34th Street	Sutton	50.00	%	50.00	%	41	January 2006	30,000
717 Fifth Avenue	Sutton/Private Investor	10.92	%	10.92	%	120	September 2006	251,900
800 Third Avenue	Private Investors	42.95	%	42.95	%	526	December 2006	285,000
1745 Broadway	Witkoff/SITQ/Lehman Bros.	32.26	%	32.26	%	674	April 2007	520,000
1 and 2 Jericho Plaza	Onyx/Credit Suisse	20.26	%	20.26	%	640	April 2007	210,000
The Meadows	Onyx	50.00	%	50.00	%	582	September 2007	111,500
388 and 390 Greenwich Street(3)	SITQ	50.60	%	50.60	%	2,600	December 2007	1,575,000
180/182 Broadway(4)	Harel/Sutton	25.50	%	25.50	%	71	February 2008	43,600
600 Lexington Avenue	CPPIB	55.00	%	55.00	%	304	May 2010	193,000
11 West 34th Street	Private Investor/Sutton	30.00	%	30.00	%	17	December 2010	10,800
7 Renaissance	Cappelli	50.00	%	50.00	%	37	December 2010	4,000
3 Columbus Circle(5)	Moinian	48.90	%	48.90	%	769	January 2011	500,000
280 Park Avenue	Vornado	50.00	%	49.50	%	1,237	March 2011	400,000
1552-1560 Broadway(6)	Sutton	50.00	%	50.00	%	49	August 2011	136,550
747 Madison Avenue	Harel/Sutton	33.33	%	33.33	%	10	September 2011	66,250
724 Fifth Avenue	Sutton	50.00	%	50.00	%	65	January 2012	223,000
10 East 53rd Street	CPPIB	55.00	%	55.00	%	390	February 2012	252,500
33 Beekman(7)	Harel/Private Investor	45.90	%	45.90	%	145	August 2012	31,000
West Coast office portfolio(8)	Blackstone	42.02	%	43.74	%	4,067	September 2012	880,103
521 Fifth Avenue(9)	Plaza	50.50	%	50.50	%	460	November 2012	315,000
21 East 66th Street(10)	Private Investors	32.28	%	32.28	%	17	December 2012	75,000
315 West 36th Street	Private Investors	35.50	%	35.50	%	148	December 2012	45,000
Herald Center(11)	AG	40.00	%	40.00	%	365	January 2013	50,000

_________________________________


(1)	Acquisition price represents the actual or implied gross purchase price for the joint venture.


(2)	In March 2013, Sutton conveyed his interest in this property to us.


(3)	The property is subject to a triple-net lease arrangement with a single tenant, which expires in 2020.


(4)	In June 2013, the joint venture completed its redevelopment project and has conveyed a 30-year ground lease condominium interest in the building to Pace University, or Pace, its primary tenant.

(5)

We had an obligation to fund an additional $47.5 million to the joint venture which has been fully funded as of June 30, 2013. As a result of the sale of a condominium interest in September 2012, Young & Rubicam, Inc., or Y&R, owns a portion of the property, generally floors three through eight referred to as Y&R units. As the joint venture has an option to repurchase the Y&R units, no gain was recognized on this transaction.

(6)

In connection with this acquisition, the joint venture also acquired a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway. The purchase price relates only to the purchase of the 1552 Broadway interest which comprises 13,045 square feet. In 2012, we, along with Sutton, acquired the property at 155 West 46th Street, which is adjacent to 1552 and 1560 Broadway, and sold it to the fee owner of 1560 Broadway.


(7)	The joint venture acquired the fee interest in the property and will develop an approximately 30 story building for student housing. Upon completion of the development, the joint venture will convey a long-term ground lease condominium interest in the building to Pace.

(8)

Prior to the recapitalization in September 2012, the Company held $26.7 million in mezzanine and preferred equity positions in the entity that owned the portfolio. Following the recapitalization, Blackstone became the majority owner of the joint venture, with Equity Office Properties, a Blackstone affiliate, being responsible for the portfolio’s management and leasing. In February 2013, we acquired Gramercy’s 10.73% interest in the joint venture and simultaneously sold 20.78% of the newly acquired interest to Square Mile Capital Management LLC or Square Mile. During the nine months ended September 30, 2013, we acquired Square Mile’s 6.00% interest in the joint venture and the joint venture sold three of the properties for an aggregate of $224.3 million, on which we recognized a gain of approximately $2.1 million. The proceeds from the sale of these properties were used primarily to repay $194.5 million of the mortgage and $20.5 million of the mezzanine loan.


(9)	Following the sale of our 49.5% partnership interest in 521 Fifth Avenue, we deconsolidated the entity effective November 30, 2012 and have accounted for our investment under the equity method.


(10)	We hold a 32.28% interest in three retail and two residential units at the property and a 16.14% in four residential units at the property.


(11)	The joint venture acquired a preferred equity interest in an entity that holds the interest in a mixed commercial use property located in Manhattan. The preferred equity bears interest at a rate of 8.75% per annum and matures in June 2016.

We generally finance our joint ventures with non-recourse debt. However, in certain cases we have provided guarantees or master leases for tenant space. These guarantees and master leases terminate upon the satisfaction of specified circumstances or repayment of the underlying loans. The first mortgage notes and other loans payable collateralized by the respective joint venture properties and assignment of leases at September 30, 2013 and December 31, 2012, respectively, were as follows (amounts in thousands):



Property	Maturity Date	Interest Rate(1)		September 30, 2013		December 31, 2012
100 Park Avenue	September 2014	6.64	%	$	210,427	$	212,287
7 Renaissance	February 2015	10.00	%	1,276		856
11 West 34th Street	January 2016	4.82	%	17,279		17,491
280 Park Avenue	June 2016	6.57	%	708,525		710,000
21 West 34th Street	December 2016	5.76	%	100,000		100,000
1745 Broadway	January 2017	5.68	%	340,000		340,000
1 and 2 Jericho Plaza	May 2017	5.65	%	163,750		163,750
800 Third Avenue	August 2017	6.00	%	20,910		20,910
388 and 390 Greenwich Street(2)	December 2017	3.20	%	996,082		996,082
315 West 36th Street	December 2017	3.16	%	25,000		25,000
717 Fifth Avenue	July 2022	4.45	%	300,000		300,000
21 East 66th Street(3)	April 2023	3.60	%	12,000		12,000
717 Fifth Avenue	June 2024	9.00	%	301,520		294,509
1604-1610 Broadway(4)	—	5.66	%	27,000		27,000
Total fixed rate debt				$	3,223,769	$	3,219,885
180/182 Broadway(5)	December 2013	2.94	%	89,868		71,524
West Coast office portfolio(6)	September 2014	3.93	%	526,290		745,025
747 Madison Avenue	October 2014	2.96	%	33,125		33,125
The Meadows(7)	September 2015	7.75	%	58,212		57,000
3 Columbus Circle(8)	April 2016	2.37	%	241,264		247,253
1552 Broadway(9)	April 2016	3.47	%	143,430		113,869
Other loan payable	June 2016	1.09	%	30,000		30,000
724 Fifth Avenue	January 2017	2.54	%	120,000		120,000
10 East 53rd Street	February 2017	2.69	%	125,000		125,000
33 Beekman(10)	August 2017	2.94	%	18,362		18,362
600 Lexington Avenue	October 2017	2.27	%	121,570		124,384
388 and 390 Greenwich Street(2)	December 2017	1.18	%	142,297		142,297
27-29 West 34th Street(11)	May 2018	2.09	%	53,038		53,375
521 Fifth Avenue	November 2019	2.39	%	170,000		170,000
21 East 66th Street	June 2033	2.88	%	1,978		2,033
16 Court Street(12)				—		84,916
Total floating rate debt				$	1,874,434	$	2,138,163
Total joint venture mortgages and other loans payable				$	5,098,203	$	5,358,048

_________________________________


(1)	Effective weighted average interest rate for the three months ended September 30, 2013, taking into account interest rate hedges in effect during the period.

(2)

These loans comprised of a $576.0 million mortgage and a $562.4 million mezzanine loan, both of which are fixed rate loans, except for $72.0 million of the mortgage and $70.3 million of the mezzanine loan which are floating. Up to $200.0 million of the mezzanine loan, secured indirectly by these properties, is recourse to us. We believe it is unlikely that we will be required to perform under this guarantee.


(3)	In April 2013, this loan was refinanced at par and its maturity was extended to April 2023.


(4)	This loan went into default in November 2009 due to the non-payment of debt service.


(5)	This loan has a committed amount of $90.0 million.


(6)	As a result of the sale of two of its properties, the joint venture paid down $194.5 million of its mortgage and $20.5 million of its mezzanine loan.


(7)	As of September 30, 2013, $1.8 million of the existing loan remained unfunded.

(8)

This loan has a committed amount of $260.0 million. The joint venture has the ability to increase the mortgage by $40.0 million based on meeting certain performance hurdles. In connection with this obligation, we executed a master lease agreement and our joint venture partner executed a contribution agreement to reflect its pro rata obligation under the master lease. The lien on the mortgage and the master lease excludes the condominium interest owned by Y&R. See Note 5 of prior table.


(9)	In April 2013, we refinanced the previous $119.6 million mortgage with a $200.0 million three-year loan construction financing facility comprised of a $170.0 million mortgage loan and a $30.0 million mezzanine loan. The facility has two one-year extension options. As of September 30, 2013, $44.2 million of the mortgage loan and $12.4 million of the mezzanine loan remained unfunded.


(10)	This loan has a committed amount of $75.0 million, which is recourse to us. Our partner has indemnified us for its pro rata share of the recourse guarantee. A portion of the guarantee terminates upon the joint venture reaching certain milestones. We believe it is unlikely that we will be required to perform under this guarantee.


(11)	In May 2013, this loan was refinanced and its maturity was extended to May 2018.


(12)	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest.

We act as the operating partner and day-to-day manager for all our unconsolidated joint ventures, except for 800 Third Avenue, 1 and 2 Jericho Plaza, 3 Columbus Circle, West Coast portfolio and The Meadows. We are entitled to receive fees for providing management, leasing, construction supervision and asset management services to our joint ventures. We earned approximately $3.5 million, $7.5 million, $2.5 million and $6.2 million from these services for the three and nine months ended September 30, 2013 and 2012, respectively. In addition, we have the ability to earn incentive fees based on the ultimate financial performance of certain of the joint venture properties.

The combined balance sheets for the unconsolidated joint ventures, at September 30, 2013 and December 31, 2012, are as follows (in thousands):



	September 30, 2013		December 31, 2012
Assets
Commercial real estate property, net	$	6,566,636	$	6,910,991
Other assets	937,469		728,113
Total assets	$	7,504,105	$	7,639,104

Liabilities and members’ equity
Mortgages and other loans payable	$	5,098,203	$	5,358,048
Other liabilities	378,752		406,929
Members’ equity	2,027,150		1,874,127
Total liabilities and members’ equity	$	7,504,105	$	7,639,104
Company’s net investment in unconsolidated joint ventures	$	1,109,815	$	1,032,243

The combined statements of income for the unconsolidated joint ventures for the three and nine months ended September 30, 2013 and 2012, respectively, are as follows (in thousands):



	Three Months Ended September 30,					Nine Months Ended September 30,
	2013			2012		2013			2012
Total revenues	$	156,571		$	120,121	$	462,776		$	364,587
Operating expenses	29,211			17,984		86,027			50,957
Ground rent	657			657		1,972			2,317
Real estate taxes	19,105			12,008		53,368			37,865
Interest expense, net of interest income	56,169			55,058		169,137			160,528
Amortization of deferred financing costs	2,869			2,338		12,454			7,009
Depreciation and amortization	49,402			35,242		144,552			107,749
Transaction related costs	—			934		—			1,292
Total expenses	157,413			124,221		467,510			367,717
Gain on early extinguishment of debt	—			21,421		—			21,421
Net (loss) income	$	(842	)	$	17,321	$	(4,734	)	$	18,291
Company’s equity in net income of unconsolidated joint ventures	$	2,939		$	11,658	$	4,251		$	80,988

Equity in net income of unconsolidated joint ventures for the nine months ended September 30, 2012 includes $67.9 million of additional income recognized in June 2012 as a result of the distribution of refinancing proceeds from the recapitalization of 717 Fifth Avenue and $10.8 million of additional income recognized in August 2012 as a result of the repayment of the Meadows' previous mortgage at a discount.

- Definition

The entire disclosure for equity method investments and joint ventures. Equity method investments are investments that give the investor the ability to exercise significant influence over the operating and financial policies of an investee. Joint ventures are entities owned and operated by a small group of businesses as a separate and specific business or project for the mutual benefit of the members of the group.

+ References + Details

Deferred Costs

9 Months Ended

Sep. 30, 2013

Deferred Costs [Abstract]

Deferred Costs

Deferred costs at September 30, 2013 and December 31, 2012 consisted of the following (in thousands):



	September 30, 2013			December 31, 2012
Deferred financing	$	149,888		$	152,596
Deferred leasing	304,135			285,931
	454,023			438,527
Less accumulated amortization	(206,173		)	(177,382		)
Deferred costs, net	$	247,850		$	261,145

Mortgages and Other Loans Payable

9 Months Ended

Sep. 30, 2013

Mortgages and Other Loans Payable

Mortgages and Other Loans Payable

The first mortgages and other loans payable collateralized by the respective properties and assignment of leases at September 30, 2013 and December 31, 2012, respectively, were as follows (amounts in thousands):



Property	Maturity Date	Interest Rate(1)		September 30, 2013		December 31, 2012
609 Partners, LLC(2)	July 2014	5.00	%	$	23	$	23
125 Park Avenue	October 2014	5.75	%	146,250		146,250
711 Third Avenue	June 2015	4.99	%	120,000		120,000
625 Madison Avenue	November 2015	7.27	%	122,178		125,603
500 West Putnam	January 2016	5.52	%	23,665		24,060
420 Lexington Avenue	September 2016	7.15	%	183,443		184,992
Landmark Square	December 2016	4.00	%	83,309		84,486
485 Lexington Avenue	February 2017	5.61	%	450,000		450,000
120 West 45th Street	February 2017	6.12	%	170,000		170,000
762 Madison Avenue	February 2017	3.75	%	8,252		8,371
2 Herald Square	April 2017	5.36	%	191,250		191,250
885 Third Avenue	July 2017	6.26	%	267,650		267,650
Other loan payable(3)	September 2019	8.00	%	50,000		50,000
One Madison Avenue	May 2020	5.91	%	592,560		607,678
100 Church	July 2022	4.68	%	230,000		230,000
919 Third Avenue(4)	June 2023	5.12	%	500,000		500,000
400 East 57th Street	February 2024	4.13	%	70,000		70,000
400 East 58th Street	February 2024	4.13	%	30,000		30,000
1515 Broadway(5)	March 2025	3.93	%	900,000		—
300 Main Street(6)	—	—		—		11,500
220 East 42nd Street	—	—		—		185,906
Total fixed rate debt				$	4,138,580	$	3,457,769
16 Court Street(7)	October 2013	2.69	%	84,354		—
Master repurchase(8)	November 2013	3.19	%	131,966		116,667
180 Maiden Lane(9)	November 2016	2.38	%	264,858		271,215
248-252 Bedford Avenue	March 2018	2.44	%	22,000		—
1515 Broadway(5)	—	—		—		769,813
Total floating rate debt				$	503,178	$	1,157,695
Total mortgages and other loans payable				$	4,641,758	$	4,615,464

_________________________________


(1)	Effective weighted average interest rate for the three months ended September 30, 2013, taking into account interest rate hedges in effect during the period.


(2)	As part of an acquisition, the Operating Partnership issued 63.9 million units of its 5.0% Series E preferred units, or the Series E units, with a liquidation preference of $1.00 per unit. As of September 30, 2013, 63.8 million Series E units had been redeemed.


(3)	This loan is secured by a portion of a preferred equity investment.


(4)	We own a 51.0% controlling interest in the joint venture that is the borrower on this loan. This loan is non-recourse to us.


(5)	In February 2013, we refinanced the previous $775.0 million mortgage with a new $900.0 million 12-year mortgage and realized a net loss on early extinguishment of debt of approximately $18.5 million, including a prepayment penalty of $7.6 million.


(6)	The property was sold in September 2013.


(7)	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest. In October 2013, the maturity date of the loan was extended to December 2013.

(8)

The Master Repurchase Agreement, or MRA, has a maximum facility capacity of $175.0 million, under which we agreed to sell certain debt investments in exchange for cash with a simultaneous agreement to repurchase the same debt investments at a certain date or on demand. In September 2013, the maturity of this MRA was extended to November 2013 subject to a 10 months extension option. This MRA bears interest based on 1-month LIBOR plus 300 basis points through September 2013 and a floating rate of interest of 350 basis points over 1-month LIBOR through the extended maturity date.


(9)	In connection with this consolidated joint venture obligation, we executed a master lease agreement. Our partner has executed a contribution agreement to reflect its 50.1% share of the obligation under the master lease.

At September 30, 2013 and December 31, 2012, the gross book value of the properties and debt and preferred equity investments collateralizing the mortgages and other loans payable was approximately $8.0 billion and $7.6 billion, respectively.

Corporate Indebtedness

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Corporate Indebtedness

2012 Credit Facility

In November 2012, we entered into a $1.6 billion credit facility, or the 2012 credit facility, which refinanced, extended and upsized the previous 2011 revolving credit facility. The 2012 credit facility consists of a $1.2 billion revolving credit facility, or the revolving credit facility, and a $400.0 million term loan, or the term loan facility. The revolving credit facility matures in March 2017 and includes two six-month extension options, subject to certain conditions and the payment of an extension fee of 10 basis points for each such extension. We also have an option, subject to customary conditions, without the consent of existing lenders, to increase the capacity under the revolving credit facility to $1.5 billion at any time prior to the maturity date for the revolving credit facility, by obtaining additional commitments from our current lenders and other financial institutions. The term loan facility matures on March 30, 2018.

The 2012 credit facility bears interest at a spread over LIBOR ranging from (i) 100 basis points to 175 basis points for loans under the revolving credit facility and (ii) 115 basis points to 200 basis points for loans under the term loan facility, in each case based on the credit rating assigned to the senior unsecured long term indebtedness of ROP. At September 30, 2013, the applicable spread was 145 basis points for revolving credit facility and 165 basis points for the term loan facility. At September 30, 2013, the effective interest rate was 1.64% for revolving credit facility and 2.00% for the term loan facility. We are required to pay quarterly in arrears a 15 to 35 basis point fee on the unused balance of the commitments under the revolving credit facility. As of September 30, 2013, the facility fee was 30 basis points. At September 30, 2013, we had approximately $79.1 million of outstanding letters of credit, $340.0 million borrowings under the revolving credit facility and $400.0 million outstanding under the term loan facility, with undrawn capacity of $0.9 billion under the 2012 credit facility.

The Company, ROP and the Operating Partnership are all borrowers jointly and severally obligated under the 2012 credit facility. No other subsidiary of ours is an obligor under the 2012 credit facility.

The 2012 credit facility includes certain restrictions and covenants (see Restrictive Covenants below).

Senior Unsecured Notes

The following table sets forth our senior unsecured notes and other related disclosures as of September 30, 2013 and December 31, 2012, respectively by scheduled maturity date (amounts in thousands):



Issuance	September 30, 2013 Unpaid Principal Balance		September 30, 2013 Accreted Balance		December 31, 2012 Accreted Balance		Coupon Rate(1)		Effective Rate		Term (in Years)	Maturity Date
August 13, 2004(2)(3)	$	75,898	$	75,898	$	75,898	5.88	%	5.88	%	10	August 15, 2014
March 31, 2006(2)(3)	255,308		255,194		255,165		6.00	%	6.00	%	10	March 31, 2016
October 12, 2010(4)	345,000		295,151		287,373		3.00	%	3.00	%	7	October 15, 2017
August 5, 2011(5)	250,000		249,666		249,620		5.00	%	5.00	%	7	August 15, 2018
March 16, 2010(5)	250,000		250,000		250,000		7.75	%	7.75	%	10	March 15, 2020
November 15, 2012(5)	200,000		200,000		200,000		4.50	%	4.50	%	10	December 1, 2022
June 27, 2005(2)(6)	7		7		7		4.00	%	4.00	%	20	June 15, 2025
March 26, 2007(7)	11,953		11,953		16,893		3.00	%	3.00	%	20	March 30, 2027
	$	1,388,166	$	1,337,869	$	1,334,956

_________________________________


(1)	Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.


(2)	Issued by ROP.


(3)	On December 27, 2012, we repurchased $42.4 million of aggregate principal amount of these notes, consisting of $22.7 million of the 5.875% Notes and $19.7 million of the 6.0% Notes, for a total consideration of $46.4 million and realized a net loss on early extinguishment of debt of approximately $3.8 million.

(4)

In October 2010, the Operating Partnership issued $345.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on April 15 and October 15. The notes had an initial exchange rate representing an exchange price that was set at a 30.0% premium to the last reported sale price of the Company's common stock on October 6, 2010, or $85.81. The initial exchange rate is subject to adjustment under certain circumstances. The current exchange rate is 11.7153 shares of our common stock per $1,000 principal amount of these notes. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of our common stock, if any, at our option. The notes are guaranteed by ROP. On the issuance date, $78.3 million of the debt balance was recorded in equity. As of September 30, 2013, approximately $49.8 million remained to be amortized into the debt balance.


(5)	Issued by the Company, the Operating Partnership and ROP, as co-obligors.

(6)

Exchangeable senior debentures which are currently callable at par. In addition, the debentures can be put to ROP, at the option of the holder at par plus accrued and unpaid interest, on June 15, 2015 and 2020 and upon the occurrence of certain change of control transactions. As a result of the acquisition of all outstanding shares of common stock of Reckson, or the Reckson Merger, the adjusted exchange rate for the debentures is 7.7461 shares of our common stock per $1,000 of principal amount of debentures and the adjusted reference dividend for the debentures is $1.3491. During the year ended December 31, 2012, we repurchased $650,000 of these bonds at par.

(7)

In March 2007, the Operating Partnership issued $750.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on March 30 and September 30. The notes have an initial exchange rate representing an exchange price that was set at a 25.0% premium to the last reported sale price of the Company's common stock on March 20, 2007, or $173.30. The initial exchange rate is subject to adjustment under certain circumstances. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of the Company's common stock, if any, at our option. The notes are currently redeemable at the Operating Partnership’s option. The Operating Partnership may be required to repurchase the notes on March 30, 2017 and 2022, and upon the occurrence of certain designated events. On March 30, 2012, we repurchased $102.2 million of aggregate principal amount of the exchangeable notes pursuant to a mandatory offer to repurchase the notes. On the issuance date, $66.6 million was recorded in equity and was fully amortized into the debt balance as of March 31, 2012. On January 2, 2013, we repurchased $4.9 million of aggregate principal amount of exchangeable notes at 99.6% of the principal amount.

Restrictive Covenants

The terms of the 2012 credit facility and certain of our senior unsecured notes include certain restrictions and covenants which may limit, among other things, our ability to pay dividends, make certain types of investments, incur additional indebtedness, incur liens and enter into negative pledge agreements and dispose of assets, and which require compliance with financial ratios relating to the minimum amount of tangible net worth, a maximum ratio of total indebtedness to total asset value, a minimum ratio of EBITDA to fixed charges, a maximum ratio of secured indebtedness to total asset value and a maximum ratio of unsecured indebtedness to unencumbered asset value. The dividend restriction referred to above provides that we will not during any time when a default is continuing, make distributions with respect to common stock or other equity interests, except to enable us to continue to qualify as a REIT for Federal income tax purposes. As of September 30, 2013 and December 31, 2012, we were in compliance with all such covenants.

Junior Subordinate Deferrable Interest Debentures

In June 2005, the Company and the Operating Partnership issued $100.0 million in unsecured floating rate trust preferred securities through a newly formed trust, SL Green Capital Trust I, or the Trust, which is a wholly-owned subsidiary of the Operating Partnership. The proceeds from the security offering were transferred to the Operating Partnership as a loan. The securities mature in 2035 and bear interest at a fixed rate of 5.61% for the first ten years ending July 2015. Interest payments may be deferred for a period of up to eight consecutive quarters if the Operating Partnership exercises its right to defer such payments. The Trust preferred securities are redeemable, at the option of the Operating Partnership, in whole or in part, with no prepayment premium. We do not consolidate the Trust even though it is a variable interest entity as we are not the primary beneficiary. Because the Trust is not consolidated, we have recorded the debt on our balance sheet and the related payments are classified as interest expense.

Principal Maturities

Combined aggregate principal maturities of mortgages and other loans payable, revolving credit facility, trust preferred securities, term loan and senior unsecured notes and our share of joint venture debt as of September 30, 2013, including as-of-right extension options, were as follows (in thousands):



	Scheduled Amortization		Principal Repayments		Revolving Credit Facility		Trust Preferred Securities		Term Loan and Senior Unsecured Notes		Total		Joint Venture Debt
2013	$	10,093	$	216,320	$	—	$	—	$	—	$	226,413	$	77,387
2014	43,808		146,273		—		—		75,898		265,979		324,001
2015	47,028		229,537		—		—		7		276,572		41,085
2016	55,689		515,487		—		—		255,308		826,484		597,456
2017	61,213		1,086,579		—		—		356,953		1,504,745		930,713
Thereafter	311,611		1,918,121		340,000		100,000		1,100,000		3,769,732		198,805
	$	529,442	$	4,112,317	$	340,000	$	100,000	$	1,788,166	$	6,869,925	$	2,169,447

Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands):



	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Interest expense	$	83,536		$	86,045		$	248,905		$	248,986
Interest income	(563		)	(386		)	(1,485		)	(1,197		)
Interest expense, net	$	82,973		$	85,659		$	247,420		$	247,789
Interest capitalized	$	2,828		$	3,360		$	9,191		$	8,892

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

Related Party Transactions

9 Months Ended

Sep. 30, 2013

Related Party Transactions

Cleaning/ Security/ Messenger and Restoration Services

Through Alliance Building Services, or Alliance, First Quality Maintenance, L.P., or First Quality, provides cleaning, extermination and related services, Classic Security LLC provides security services, Bright Star Couriers LLC provides messenger services and Onyx Restoration Works provides restoration services with respect to certain properties owned by us. Alliance is partially owned by Gary Green, a son of Stephen L. Green, the chairman of our board of directors. In addition, First Quality has the non-exclusive opportunity to provide cleaning and related services to individual tenants at our properties on a basis separately negotiated with any tenant seeking such additional services. The Service Corporation has entered into an arrangement with Alliance whereby it will receive a profit participation above a certain threshold for services provided by Alliance to certain tenants at certain buildings above the base services specified in their lease agreements. Alliance paid the Service Corporation approximately $0.8 million, $2.7 million, $0.8 million and $2.4 million, for the three and nine months ended September 30, 2013 and 2012, respectively. We paid Alliance approximately $4.8 million, $13.2 million, $4.7 million and $12.9 million for the three and nine months ended September 30, 2013 and 2012, respectively, for these services (excluding services provided directly to tenants).

Marketing Services

A-List Marketing, LLC, or A-List, provides marketing services to us. Ms. Deena Wolff, a sister of Mr. Marc Holliday, is the owner of A-List. The aggregate amount of fees we paid to A-List for these marketing services was approximately $50,700, $158,000, $2,400 and $58,300 for the three and nine months ended September 30, 2013 and 2012, respectively.

Leases

Nancy Peck and Company leases 1,003 square feet of space at 420 Lexington Avenue under a lease that ends in August 2015. Nancy Peck and Company is owned by Nancy Peck, the wife of Stephen L. Green. The rent due pursuant to the lease was $35,516 per annum for year one increasing to $40,000 in year seven.

Management Fees

S.L. Green Management Corp., a consolidated entity, receives property management fees from an entity in which Stephen L. Green owns an interest. The aggregate amount of fees paid to S.L. Green Management Corp. from such entity was approximately $105,000, $319,000, $93,000 and $292,000 for the three and nine months ended September 30, 2013 and 2012, respectively.

Other

Amounts due to/from related parties at September 30, 2013 and December 31, 2012 consisted of the following (in thousands):



	September 30, 2013		December 31, 2012
Due from joint ventures	$	2,128	$	511
Other	5,672		7,020
Related party receivables	$	7,800	$	7,531
Due to a joint venture (included in Accounts payable and accrued expenses)	$	—	$	(8,401	)

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39622-107864

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39678-107864

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39691-107864

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph b
-Article 3A

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph k
-Article 4

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 57
-Paragraph 1-4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Noncontrolling Interests in Operating Partnership

9 Months Ended

Sep. 30, 2013

Noncontrolling Interest [Abstract]

Noncontrolling Interests in Operating Partnership

Noncontrolling Interests on the Company's Consolidated Financial Statements

Noncontrolling interests represent the common and preferred units of limited partnership interest in the Operating Partnership not held by the Company as well as third party equity interests in our other consolidated subsidiaries. Noncontrolling interests in the Operating Partnership are shown in the mezzanine equity while the noncontrolling interests in our other consolidated subsidiaries are shown in the equity section of the Company’s consolidated financial statements.

Common Units of Limited Partnership Interest in the Operating Partnership

As of September 30, 2013 and December 31, 2012, the noncontrolling interest unit holders owned 2.94% (2,792,050 common units) and 2.94% (2,759,758 common units) of the Operating Partnership, respectively. At September 30, 2013, 2,792,050 shares of our common stock were reserved for issuance upon redemption of units of limited partnership interest of the Operating Partnership.

Noncontrolling interests in the Operating Partnership is recorded at the greater of its cost basis or fair market value based on the closing stock price of our common stock at the end of the reporting period.

Below is the rollforward analysis of the activity relating to the noncontrolling interests in the Operating Partnership (in thousands):



	Nine Months Ended September 30, 2013			Year Ended December 31, 2012
Balance at beginning of period	$	212,907		$	195,030
Distributions	(2,695		)	(3,296		)
Issuance of common units	14,270			42,239
Redemption of common units	(17,287		)	(87,513		)
Net income	1,909			5,597
Accumulated other comprehensive income (loss) allocation	490			(388		)
Fair value adjustment	38,452			61,238
Balance at end of period	$	248,046		$	212,907

Preferred Units of Limited Partnership Interest in the Operating Partnership

The Operating Partnership has 1,902,000 4.5% Series G preferred units of limited partnership interest, or the Series G preferred units, with a liquidation preference of $25.00 per unit, which was issued in January 2012 as part of an acquisition. The Series G preferred unitholders receive annual dividends of $1.125 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series G preferred units are convertible into a number of common units of limited partnership interest in the Operating Partnership equal to (i) the liquidation preference plus accumulated and unpaid distributions on the conversion date divided by (ii) $88.50. The common units of limited partnership interest in the Operating Partnership may be redeemed in exchange for our common stock on a 1-to-1 basis. The Series G preferred units also provide the holder with the right to require the Operating Partnership to repurchase the Series G preferred units for cash before January 31, 2022.

The Operating Partnership has 80,000 6.0% Series H preferred units, or the Series H preferred units, with a mandatory liquidation preference of $25.00 per unit, which was issued in November 2011 as part of an acquisition. The Series H preferred unitholders receive annual dividends of $1.50 per unit paid on a quarterly basis and dividends are cumulative, subject to certain provisions. The Series H preferred units can be redeemed at any time at par for cash at the Operating Partnership’s option or the option of the unitholder.

The Operating Partnership also has 22,658 units of its 5.00% Series E Preferred Units of limited partnership interest outstanding with a mandatory liquidation preference of $1.00 per unit which are included and further described in Note 8, “Mortgages and other loans payable.”

The Operating Partnership also has 60 units of its Series F Preferred Units outstanding with a mandatory liquidation preference of $1,000.00 per unit.

- Definition

The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock.

+ References + Details

Stockholders' Equity of the Company

9 Months Ended

Sep. 30, 2013

Stockholders' Equity Note [Abstract]

Stockholders' Equity

Stockholders’ Equity of the Company

Common Stock

Our authorized capital stock consists of 260,000,000 shares, $0.01 par value, of which we have authorized the issuance of up to 160,000,000 shares of common stock, $0.01 par value per share, 75,000,000 shares of excess stock, at $0.01 par value per share, and 25,000,000 shares of preferred stock, par value $0.01 per share. As of September 30, 2013, 92,214,396 shares of common stock and no shares of excess stock were issued and outstanding.

At-The-Market Equity Offering Program

In July 2011, the Company, along with the Operating Partnership, entered into an “at-the-market” equity offering program, or ATM Program, to sell an aggregate of $250.0 million of the Company's common stock. During the nine months ended September 30, 2013, the Company sold 462,276 shares of its common stock through the ATM Program for aggregate gross proceeds of approximately $42.5 million ($41.8 million of net proceeds after related expenses). The net proceeds from these offerings were contributed to the Operating Partnership in exchange for 462,276 common units of limited partnership interest and were used to repay debt, fund new investments and for other corporate purposes. As of September 30, 2013, we had $2.8 million available to issue under the ATM Program.

Perpetual Preferred Stock

We have 9,200,000 shares of our 6.50% Series I Cumulative Redeemable Preferred Stock, or the Series I Preferred Stock, outstanding with a mandatory liquidation preference of $25.00 per share. The Series I Preferred stockholders receive annual dividends of $1.625 per share paid on a quarterly basis and dividends are cumulative, subject to certain provisions. We are entitled to redeem the Series I Preferred Stock at par for cash at our option on or after August 10, 2017. In August 2012, we received $221.9 million in net proceeds from the issuance of the Series I Preferred Stock, which were recorded net of underwriters’ discount and issuance costs, and contributed the net proceeds to the Operating Partnership in exchange for 9,200,000 units of its 6.50% Series I Cumulative Redeemable Preferred Units of limited partnership interest, or the Series I Preferred Units.

In June 2013, we redeemed the remaining 7,700,000 outstanding shares of our 7.625% Series C Cumulative Redeemable Preferred stock, or the Series C Preferred Stock at a redemption price of $25.00 per share plus $0.3495 in accumulated and unpaid dividends on such Preferred Stock through June 21, 2013. We recognized $12.2 million of costs to redeem the remaining Series C Preferred Stock. In September 2012, we had redeemed 4,000,000 shares of our 11,700,000 shares of Series C Preferred Stock, at a redemption price of $25.00 per share plus $0.3707 in accumulated and unpaid dividends on such Preferred Stock through September 24, 2012. We recognized $6.3 million of costs to redeem partially the Series C Preferred Stock. Simultaneously with each redemption, an equal number of 7.625% Series C Cumulative Redeemable Preferred Units of limited partnership interest of the Operating Partnership, or the Series C Preferred Units, were redeemed at the redemption price paid by us to the Series C Preferred stockholders. The Series C Preferred stockholders received annual dividends of $1.90625 per share paid on a quarterly basis and dividends were cumulative, subject to certain provisions.

In July 2012, we redeemed all 4,000,000 shares of our 7.875% Series D Cumulative Redeemable Preferred stock, or Series D Preferred Stock, at a redemption price of $25.00 per share plus $0.4922 in accumulated and unpaid dividends on such Preferred Stock through July 14, 2012 and recognized $3.7 million of costs to redeem the Series D Preferred Stock. Simultaneously with that redemption, an equal number of 7.875% Series D Cumulative Redeemable Preferred Units of limited partnership interest of the Operating Partnership, or the Series D Preferred Units, were redeemed at the redemption price paid by SL Green to the Series D Preferred stockholders. The Series D Preferred stockholders received annual dividends of $1.96875 per share paid on a quarterly basis and dividends were cumulative, subject to certain provisions.

Dividend Reinvestment and Stock Purchase Plan

In March 2012, the Company filed a registration statement with the SEC for our dividend reinvestment and stock purchase plan, or DRIP, which automatically became effective upon filing. The Company registered 3,500,000 shares of its common stock under the DRIP. The DRIP commenced on September 24, 2001.

During the nine months ended September 30, 2013 and 2012, the Company issued approximately 651 shares and 1.3 million shares of its common stock and received approximately $57,000 and $99.5 million of proceeds, respectively, from dividend reinvestments and/or stock purchases under the DRIP. DRIP shares may be issued at a discount to the market price.

Earnings per Share

Earnings per share for the three and nine months ended September 30, 2013 and 2012 is computed as follows (amounts in thousands):



	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator
Basic Earnings:
Income attributable to SL Green common stockholders	$	37,025	$	7,732	$	64,210	$	136,028
Effect of Dilutive Securities:
Redemption of units to common shares	1,110		567		1,909		4,876
Stock options	—		—		—		—
Diluted Earnings:
Income attributable to SL Green common stockholders	$	38,135	$	8,299	$	66,119	$	140,904



	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Denominator
Basic Earnings:
Weighted average common stock oustanding	91,988	90,241	91,684	88,929
Effect of Dilutive Securities:
Redemption of units to common stock	2,792	3,320	2,705	3,188
3.00% exchangeable senior notes due 2017	—	—	—	—
3.00% exchangeable senior notes due 2027	—	—	—	—
4.00% exchangeable senior debentures due 2025	—	—	—	—
Stock-based compensation plans	236	330	242	368
Diluted weighted average common stock outstanding	95,016	93,891	94,631	92,485

We have excluded approximately 703,702, 922,239, 548,000 and 613,000 common stock equivalents from the diluted shares outstanding for the three and nine months ended September 30, 2013 and 2012, respectively, as they were anti-dilutive.

Partners' Capital of the Operating Partnership

The Company is the sole general partner of the Operating Partnership and at September 30, 2013 owned 92,214,396 general and limited partnership interests in the Operating Partnership and 9,200,000 Series I Preferred Units. Partnership interests in the Operating Partnership are denominated as “common units of limited partnership interest” (also referred to as “OP Units”) or “preferred units of limited partnership interest” (also referred to as “Preferred Units”). All references to OP Units and Preferred Units outstanding exclude such units held by the Company. A holder of an OP Unit may present such OP Unit to the Operating Partnership for redemption at any time (subject to restrictions agreed upon at the issuance of OP Units to particular holders that may restrict such right for a period of time, generally one year from issuance). Upon presentation of an OP Unit for redemption, the Operating Partnership must redeem such OP Unit in exchange for the cash equal to the then value of a share of common stock of the Company, except that the Company may, at its election, in lieu of cash redemption, acquire such OP Unit for one share of common stock. Because the number of shares of common stock outstanding at all times equals the number of OP Units that the Company owns, one share of common stock is generally the economic equivalent of one OP Unit, and the quarterly distribution that may be paid to the holder of an OP Unit equals the quarterly dividend that may be paid to the holder of a share of common stock. Each series of Preferred Units makes a distribution that is set in accordance with an amendment to the partnership agreement of the Operating Partnership. Preferred Units may also be convertible into OP Units at the election of the holder thereof or the Company, subject to the terms of such Preferred Units.

Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.

Limited Partner Units

As of September 30, 2013, limited partners other than SL Green owned approximately 2.94% (2,792,050 common units) of the Operating Partnership.

Preferred Units

Preferred units not owned by SL Green are further described in Note 11, “Noncontrolling Interests on the Company’s Consolidated Financial Statements - Preferred Units of Limited Partnership Interest in the Operating Partnership.”

Earnings per Unit



	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator
Basic Earnings:
Income attributable to SLGOP common unitholders	$	38,135	$	8,299	$	66,119	$	140,904
Effect of Dilutive Securities:
Stock options	—		—		—		—
Diluted Earnings:
Income attributable to SLGOP common unitholders	$	38,135	$	8,299	$	66,119	$	140,904



	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Denominator
Basic Earnings:
Weighted average common units outstanding	94,780	93,561	94,389	92,117
Effect of Dilutive Securities:
3.00% exchangeable senior notes due 2017	—	—	—	—
3.00% exchangeable senior notes due 2027	—	—	—	—
4.00% exchangeable senior debentures due 2025	—	—	—	—
Stock-based compensation plans	236	330	242	368
Diluted weighted average common units outstanding	95,016	93,891	94,631	92,485

We have excluded approximately 703,702, 922,239, 548,000 and 613,000 common unit equivalents from the diluted units outstanding for the three and nine months ended September 30, 2013 and 2012, respectively, as they were anti-dilutive.

- Definition

The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(d),(e))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 2
-Subparagraph (SAB TOPIC 4.E)
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Preferred Stock
-URI http://asc.fasb.org/extlink&oid=6521494

Reference 12: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21564-112644

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Section B
-Paragraph 7, 11A
-Chapter 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 17: http://www.xbrl.org/2003/role/presentationRef
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Reference 18: http://www.xbrl.org/2003/role/presentationRef
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Reference 19: http://www.xbrl.org/2003/role/presentationRef
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Reference 20: http://www.xbrl.org/2003/role/presentationRef
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-Number 210
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Reference 21: http://www.xbrl.org/2003/role/presentationRef
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Reference 22: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 23: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

+ Details

Partners' Capital of the Operating Partnership

9 Months Ended

Sep. 30, 2013

Equity [Abstract]

Partners' Capital of the Operating Partnership

Stockholders’ Equity of the Company

Common Stock

At-The-Market Equity Offering Program

Perpetual Preferred Stock

Dividend Reinvestment and Stock Purchase Plan

Earnings per Share

Earnings per share for the three and nine months ended September 30, 2013 and 2012 is computed as follows (amounts in thousands):



	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator
Basic Earnings:
Income attributable to SL Green common stockholders	$	37,025	$	7,732	$	64,210	$	136,028
Effect of Dilutive Securities:
Redemption of units to common shares	1,110		567		1,909		4,876
Stock options	—		—		—		—
Diluted Earnings:
Income attributable to SL Green common stockholders	$	38,135	$	8,299	$	66,119	$	140,904



	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Denominator
Basic Earnings:
Weighted average common stock oustanding	91,988	90,241	91,684	88,929
Effect of Dilutive Securities:
Redemption of units to common stock	2,792	3,320	2,705	3,188
3.00% exchangeable senior notes due 2017	—	—	—	—
3.00% exchangeable senior notes due 2027	—	—	—	—
4.00% exchangeable senior debentures due 2025	—	—	—	—
Stock-based compensation plans	236	330	242	368
Diluted weighted average common stock outstanding	95,016	93,891	94,631	92,485

Partners' Capital of the Operating Partnership

Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.

Limited Partner Units

As of September 30, 2013, limited partners other than SL Green owned approximately 2.94% (2,792,050 common units) of the Operating Partnership.

Preferred Units

Earnings per Unit



	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator
Basic Earnings:
Income attributable to SLGOP common unitholders	$	38,135	$	8,299	$	66,119	$	140,904
Effect of Dilutive Securities:
Stock options	—		—		—		—
Diluted Earnings:
Income attributable to SLGOP common unitholders	$	38,135	$	8,299	$	66,119	$	140,904



	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Denominator
Basic Earnings:
Weighted average common units outstanding	94,780	93,561	94,389	92,117
Effect of Dilutive Securities:
3.00% exchangeable senior notes due 2017	—	—	—	—
3.00% exchangeable senior notes due 2027	—	—	—	—
4.00% exchangeable senior debentures due 2025	—	—	—	—
Stock-based compensation plans	236	330	242	368
Diluted weighted average common units outstanding	95,016	93,891	94,631	92,485

- Definition

+ References

+ Details

Share-based Compensation

9 Months Ended

Sep. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based Compensation

14. Share-based Compensation

We have a stock-based employee and director compensation plans. Our employees are compensated through the Operating Partnership. Under each plan, whenever the Company issues common or preferred stock, the Operating Partnership issues an equivalent number of units of limited partnership interest of a corresponding class to the Company.

Third Amended and Restated 2005 Stock Option and Incentive Plan

The Third Amended and Restated 2005 Stock Option and Incentive Plan, or the 2005 Plan, was approved by the Company's board of directors in April 2013 and its stockholders in June 2013 at the Company's annual meeting of stockholders. The 2005 Plan authorizes the issuance of stock options, stock appreciation rights, unrestricted and restricted stock, phantom shares, dividend equivalent rights and other equity-based awards. Subject to adjustments upon certain corporate transactions or events, awards with respect to up to a maximum of 17,130,000 fungible units may be granted under the 2005 Plan. Currently, different types of awards count against the limit on the number of fungible units differently, with (1) full-value awards (i.e., those that deliver the full value of the award upon vesting, such as restricted stock) counting as 2.76 fungible units per share subject to such award (2) stock options, stock appreciation rights and other awards that do not deliver full value and expire five year from the date of grant counting as 0.77 fungible units per share subject to such awards, and (3) all other awards (e.g., ten-year stock options) counting as 1.0 fungible units per share subject to such award. Awards granted under the 2005 Plan prior to the approval of the second amendment and restatement in June 2010 and third amendment and restatement in June 2013 continue to count against the fungible unit limit based on the ratios that were in effect at the time such awards were granted, which may be different than the current ratios. As a result, depending on the types of awards issued, the 2005 Plan may result in the issuance of more or less than 17,130,000 shares. If a stock option or other award granted under the 2005 Plan expires or terminates, the common stock subject to any portion of the award that expires or terminates without having been exercised or paid, as the case may be, will again become available for the issuance of additional awards. Shares of the Company's common stock distributed under the 2005 Plan may be treasury shares or authorized but unissued shares. Currently, unless the 2005 Plan has been previously terminated by the board of directors, new awards may be granted under the 2005 Plan until June 13, 2023, which is the tenth anniversary of the date that the 2005 Plan was most recently approved by the Company's stockholders. As of September 30, 2013, 5.8 million fungible units were available for issuance under the 2005 Plan after reserving for shares underlying outstanding restricted stock units, phantom stock units granted pursuant to our Non-Employee Directors’ Deferral Program and LTIP Units, including, among others, outstanding LTIP Units issued under our 2011 Long-Term Outperformance Plan, which remain subject to performance-based vesting.

Options are granted under the plan at the fair market value on the date of grant and, subject to termination of employment, generally expire ten years from the date of grant, are not transferable other than on death, and generally vest in one to five years commencing one year from the date of grant.

The fair value of each stock option granted is estimated on the date of grant using the Black-Scholes option pricing model based on historical information with the following weighted average assumptions for grants during the nine months ended September 30, 2013 and the year ended December 31, 2012.



	September 30, 2013		December 31, 2012
Dividend yield	1.95	%	2.00	%
Expected life of option	4.7 years		3.7 years
Risk-free interest rate	0.78	%	0.46	%
Expected stock price volatility	35.59	%	37.40	%

A summary of the status of our stock options as of September 30, 2013 and December 31, 2012 and changes during the nine months ended September 30, 2013 and the year ended December 31, 2012 are presented below:



	September 30, 2013					December 31, 2012
	Options Outstanding			Weighted Average Exercise Price		Options Outstanding			Weighted Average Exercise Price
Balance at beginning of year	1,201,000			$	75.05	1,277,200			$	63.37
Granted	246,000			79.58		361,331			75.36
Exercised	(184,919		)	51.62		(382,612		)	36.65
Lapsed or canceled	(33,202		)	83.61		(54,919		)	72.99
Balance at end of period	1,228,879			$	79.25	1,201,000			$	75.05

Options exercisable at end of period	506,903			$	87.48	479,913			$	86.85
Weighted average fair value of options granted during the period	$	4,999,225				$	6,602,967

All options were granted within a price range of $20.67 to $137.18. The remaining weighted average contractual life of the options outstanding was 4.26 years years and the remaining weighted average contractual life of the options exercisable was 3.86 years.

During the three and nine months ended September 30, 2013 and 2012, we recognized approximately $2.2 million, $4.8 million, $1.0 million and $3.9 million of compensation expense, respectively, for these options. As of September 30, 2013, there was approximately $8.9 million of total unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted-average period of three years.

Stock-based Compensation

Effective January 1, 1999, we implemented a deferred compensation plan, or the Deferred Plan, covering certain of our employees, including our executives. The shares issued under the Deferred Plan were granted to certain employees, including our executives, and vesting will occur annually upon the completion of a service period or our meeting established financial performance criteria. Annual vesting occurs at rates ranging from 15% to 35% once performance criteria are reached.

A summary of our restricted stock as of September 30, 2013 and December 31, 2012 and charges during the nine months ended September 30, 2013 and the year ended December 31, 2012 is presented below:



	September 30, 2013			December 31, 2012
Balance at beginning of year	2,804,901			2,912,456
Granted	9,867			92,729
Cancelled	(3,267		)	(200,284		)
Balance at end of period	2,811,501			2,804,901
Vested during the period	6,634			408,800
Compensation expense recorded	$	4,421,551		$	6,930,381
Weighted average fair value of restricted stock granted during the period	$	882,249		$	7,023,942

The fair value of restricted stock that vested during the nine months ended September 30, 2013 and year ended December 31, 2012 was $0.4 million and $22.4 million, respectively. As of September 30, 2013, there was $8.5 million of total unrecognized compensation cost related to unvested restricted stock, which is expected to be recognized over a weighted-average period of approximately 2.0 years.

For the three and nine months ended September 30, 2013 and 2012, approximately $0.9 million , $2.9 million, $0.9 million and $2.9 million, respectively, was capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options.

2010 Notional Unit Long-Term Compensation Plan

In December 2009, the compensation committee of the Company's board of directors approved the general terms of the SL Green Realty Corp. 2010 Notional Unit Long-Term Compensation Program, or the 2010 Long-Term Compensation Plan. The 2010 Long-Term Compensation Plan is a long-term incentive compensation plan pursuant to which award recipients could earn, in the aggregate, from approximately $15.0 million up to approximately $75.0 million of LTIP Units in the Operating Partnership based on our stock price appreciation over three years beginning on December 1, 2009; provided that, if maximum performance had been achieved, approximately $25.0 million of awards could be earned at any time after the beginning of the second year and an additional approximately $25.0 million of awards could be earned at any time after the beginning of the third year. In order to achieve maximum performance under the 2010 Long-Term Compensation Plan, our aggregate stock price appreciation during the performance period had to equal or exceed 50%. The compensation committee determined that maximum performance had been achieved at or shortly after the beginning of each of the second and third years of the performance period and for the full performance period and, accordingly, 366,815 LTIP Units, 385,583 LTIP Units and 327,416 LTIP Units were earned under the 2010 Long-Term Compensation Plan in December 2010, 2011 and 2012, respectively. Substantially in accordance with the original terms of the program, 50% of these LTIP Units vested on December 17, 2012 (accelerated from the original January 1, 2013 vesting date) and the remainder is scheduled to vest ratably on January 1, 2014 and 2015 based on continued employment. In accordance with the terms of the 2010 Long-Term Compensation Plan, distributions were not paid on any LTIP Units until they were earned, at which time we paid all distributions that would have been paid on the earned LTIP Units since the beginning of the performance period.

The cost of the 2010 Long-Term Compensation Plan (approximately $31.7 million, subject to forfeitures) will be amortized into earnings through the final vesting period. We recorded compensation expense of approximately $0.9 million, $3.6 million, $3.3 million and $7.0 million during the three and nine months ended September 30, 2013 and 2012, respectively, related to the 2010 Long-Term Compensation Plan.

2011 Outperformance Plan

In August 2011, the compensation committee of the Company's board of directors approved the general terms of the SL Green Realty Corp. 2011 Outperformance Plan, or the 2011 Outperformance Plan. Participants in the 2011 Outperformance Plan may earn, in the aggregate, up to $85 million of LTIP Units in the Operating Partnership based on our total return to stockholders for the three-year period beginning September 1, 2011. Under the 2011 Outperformance Plan, participants will be entitled to share in a “performance pool” comprised of LTIP Units with a value equal to 10% of the amount, if any, by which our total return to stockholders during the three-year period exceeds a cumulative total return to stockholders of 25%, subject to the maximum of $85 million of LTIP Units; provided that if maximum performance has been achieved, approximately one-third of each award may be earned at any time after the beginning of the second year and an additional approximately one-third of each award may be earned at any time after the beginning of the third year. LTIP Units earned under the 2011 Outperformance Plan will be subject to continued vesting requirements, with 50% of any awards earned vesting on August 31, 2014 and the remaining 50% vesting on August 31, 2015, subject to continued employment with us through such dates. Participants will not be entitled to distributions with respect to LTIP Units granted under the 2011 Outperformance Plan unless and until they are earned. If LTIP Units are earned, each participant will also be entitled to the distributions that would have been paid had the number of earned LTIP Units been issued at the beginning of the performance period, with such distributions being paid in the form of additional LTIP Units. Thereafter, distributions will be paid currently with respect to all earned LTIP Units, whether vested or unvested.

The cost of the 2011 Outperformance Plan (approximately $26.3 million, subject to forfeitures) will be amortized into earnings through the final vesting period. We recorded compensation expense of approximately $1.7 million, $6.2 million, $1.4 million and $4.0 million during the three and nine months ended September 30, 2013 and 2012, respectively, related to the 2011 Outperformance Plan.

Deferred Stock Compensation Plan for Directors

Under our Independent Director’s Deferral Program, which commenced July 2004, the Company's non-employee directors may elect to defer up to 100% of their annual retainer fee, chairman fees and meeting fees. Unless otherwise elected by a participant, fees deferred under the program shall be credited in the form of phantom stock units. The phantom stock units are convertible into an equal number of shares of common stock upon such directors’ termination of service from the board of directors or a change in control by us, as defined by the program. Phantom stock units are credited to each non-employee director quarterly using the closing price of our common stock on the applicable dividend record date for the respective quarter. Each participating non-employee director’s account is also credited for an equivalent amount of phantom stock units based on the dividend rate for each quarter.

During the nine months ended September 30, 2013, 6,692 phantom stock units were earned. As of September 30, 2013, there were approximately 74,805 phantom stock units outstanding.

Employee Stock Purchase Plan

On September 18, 2007, the Company's board of directors adopted the 2008 Employee Stock Purchase Plan, or ESPP, to encourage our employees to increase their efforts to make our business more successful by providing equity-based incentives to eligible employees. The ESPP is intended to qualify as an “employee stock purchase plan” under Section 423 of the Code, and has been adopted by the board to enable our eligible employees to purchase our shares of common stock through payroll deductions. The ESPP became effective on January 1, 2008 with a maximum of 500,000 shares of the common stock available for issuance, subject to adjustment upon a merger, reorganization, stock split or other similar corporate change. The Company filed a registration statement on Form S-8 with the SEC with respect to the ESPP. The common stock is offered for purchase through a series of successive offering periods. Each offering period will be three months in duration and will begin on the first day of each calendar quarter, with the first offering period having commenced on January 1, 2008. The ESPP provides for eligible employees to purchase the common stock at a purchase price equal to 85% of the lesser of (1) the market value of the common stock on the first day of the offering period or (2) the market value of the common stock on the last day of the offering period. The ESPP was approved by the Company's stockholders at the Company's 2008 annual meeting of stockholders. As of September 30, 2013, approximately 72,026 shares of our common stock had been issued under the ESPP.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 40
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Accumulated Other Comprehensive Loss of the Company

9 Months Ended

Sep. 30, 2013

Accumulated Other Comprehensive Income (Loss) [Line Items]

Accumulated Other Comprehensive Loss of the Company

Stockholders’ Equity of the Company

Common Stock

At-The-Market Equity Offering Program

Perpetual Preferred Stock

Dividend Reinvestment and Stock Purchase Plan

Earnings per Share

Earnings per share for the three and nine months ended September 30, 2013 and 2012 is computed as follows (amounts in thousands):



	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator
Basic Earnings:
Income attributable to SL Green common stockholders	$	37,025	$	7,732	$	64,210	$	136,028
Effect of Dilutive Securities:
Redemption of units to common shares	1,110		567		1,909		4,876
Stock options	—		—		—		—
Diluted Earnings:
Income attributable to SL Green common stockholders	$	38,135	$	8,299	$	66,119	$	140,904



	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Denominator
Basic Earnings:
Weighted average common stock oustanding	91,988	90,241	91,684	88,929
Effect of Dilutive Securities:
Redemption of units to common stock	2,792	3,320	2,705	3,188
3.00% exchangeable senior notes due 2017	—	—	—	—
3.00% exchangeable senior notes due 2027	—	—	—	—
4.00% exchangeable senior debentures due 2025	—	—	—	—
Stock-based compensation plans	236	330	242	368
Diluted weighted average common stock outstanding	95,016	93,891	94,631	92,485

Partners' Capital of the Operating Partnership

Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.

Limited Partner Units

As of September 30, 2013, limited partners other than SL Green owned approximately 2.94% (2,792,050 common units) of the Operating Partnership.

Preferred Units

Earnings per Unit



	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator
Basic Earnings:
Income attributable to SLGOP common unitholders	$	38,135	$	8,299	$	66,119	$	140,904
Effect of Dilutive Securities:
Stock options	—		—		—		—
Diluted Earnings:
Income attributable to SLGOP common unitholders	$	38,135	$	8,299	$	66,119	$	140,904



	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Denominator
Basic Earnings:
Weighted average common units outstanding	94,780	93,561	94,389	92,117
Effect of Dilutive Securities:
3.00% exchangeable senior notes due 2017	—	—	—	—
3.00% exchangeable senior notes due 2027	—	—	—	—
4.00% exchangeable senior debentures due 2025	—	—	—	—
Stock-based compensation plans	236	330	242	368
Diluted weighted average common units outstanding	95,016	93,891	94,631	92,485

SL Green Realty Corporation

Accumulated Other Comprehensive Income (Loss) [Line Items]

Accumulated Other Comprehensive Loss of the Company

The following tables set forth the changes in accumulated other comprehensive income (loss) by component:



	Nine Months Ended September 30, 2013
	Net unrealized loss on derivative instruments (1)			SL Green’s share of joint venture net unrealized loss on derivative instruments (2)			Unrealized gains and loss on marketable securities		Total
Beginning balance	$	(16,834	)	$	(16,063	)	$	3,310	$	(29,587	)
Other comprehensive (loss) income before reclassifications	(121		)	5,248			317		5,444
Amounts reclassified from accumulated other comprehensive income (loss)	1,222			3,672			—		4,894
Ending balance	$	(15,733	)	$	(7,143	)	$	3,627	$	(19,249	)

___________________________

(1)

Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of income. As of September 30, 2013 and December 31, 2012, the deferred net losses from these terminated hedges, which is included in accumulated other comprehensive loss relating to net unrealized gain on derivative instrument, was approximately $14.3 million and $15.0 million, respectively.


(2)	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

- Definition

+ References

+ Details

Accumulated Other Comprehensive Loss of the Operating Partnership

9 Months Ended

Sep. 30, 2013

Accumulated Other Comprehensive Income (Loss) [Line Items]

Accumulated Other Comprehensive Loss of the Company

Stockholders’ Equity of the Company

Common Stock

At-The-Market Equity Offering Program

Perpetual Preferred Stock

Dividend Reinvestment and Stock Purchase Plan

Earnings per Share

Earnings per share for the three and nine months ended September 30, 2013 and 2012 is computed as follows (amounts in thousands):



	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator
Basic Earnings:
Income attributable to SL Green common stockholders	$	37,025	$	7,732	$	64,210	$	136,028
Effect of Dilutive Securities:
Redemption of units to common shares	1,110		567		1,909		4,876
Stock options	—		—		—		—
Diluted Earnings:
Income attributable to SL Green common stockholders	$	38,135	$	8,299	$	66,119	$	140,904



	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Denominator
Basic Earnings:
Weighted average common stock oustanding	91,988	90,241	91,684	88,929
Effect of Dilutive Securities:
Redemption of units to common stock	2,792	3,320	2,705	3,188
3.00% exchangeable senior notes due 2017	—	—	—	—
3.00% exchangeable senior notes due 2027	—	—	—	—
4.00% exchangeable senior debentures due 2025	—	—	—	—
Stock-based compensation plans	236	330	242	368
Diluted weighted average common stock outstanding	95,016	93,891	94,631	92,485

Partners' Capital of the Operating Partnership

Net income (loss) allocated to the preferred unitholders and common unitholders reflects their pro rata share of net income (loss) and distributions.

Limited Partner Units

As of September 30, 2013, limited partners other than SL Green owned approximately 2.94% (2,792,050 common units) of the Operating Partnership.

Preferred Units

Earnings per Unit



	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator
Basic Earnings:
Income attributable to SLGOP common unitholders	$	38,135	$	8,299	$	66,119	$	140,904
Effect of Dilutive Securities:
Stock options	—		—		—		—
Diluted Earnings:
Income attributable to SLGOP common unitholders	$	38,135	$	8,299	$	66,119	$	140,904



	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Denominator
Basic Earnings:
Weighted average common units outstanding	94,780	93,561	94,389	92,117
Effect of Dilutive Securities:
3.00% exchangeable senior notes due 2017	—	—	—	—
3.00% exchangeable senior notes due 2027	—	—	—	—
4.00% exchangeable senior debentures due 2025	—	—	—	—
Stock-based compensation plans	236	330	242	368
Diluted weighted average common units outstanding	95,016	93,891	94,631	92,485

SL Green Operating Partnership

Accumulated Other Comprehensive Income (Loss) [Line Items]

Accumulated Other Comprehensive Loss of the Company

Accumulated Other Comprehensive Loss of the Operating Partnership

The following tables set forth the changes in accumulated other comprehensive income (loss) by component:



	Nine Months Ended September 30, 2013
	Net unrealized loss on derivative instruments (1)			SLGOP’s share of joint venture net unrealized loss on derivative instruments (2)			Unrealized gains and loss on marketable securities		Total
Beginning balance	$	(17,438	)	$	(16,640	)	$	3,429	$	(30,649	)
Other comprehensive (loss) income before reclassifications	(20		)	5,503			306		5,789
Amounts reclassified from accumulated other comprehensive income (loss)	1,258			3,781			—		5,039
Ending balance	$	(16,200	)	$	(7,356	)	$	3,735	$	(19,821	)

___________________________

(1)


(2)	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

- Definition

+ References

+ Details

Fair Value Measurements

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

Fair Value Measurements

We are required to disclose the fair value information about our financial instruments, whether or not recognized in the consolidated balance sheets, for which it is practicable to estimate fair value. FASB guidance defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. We measure and disclose the estimated fair value of financial assets and liabilities based on a hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity and the reporting entity’s own assumptions about market participant assumptions. This hierarchy consist of three broad levels: Level 1 - quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity can access at the measurement date; Level 2 - inputs other than quoted prices included within Level 1, that are observable for the asset or liability, either directly or indirectly; and Level 3 - unobservable inputs for the asset or liability that are used when little or no market data is available. We follow this hierarchy for our assets and liabilities measured at fair value on a recurring and nonrecurring basis. In instances in which the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the level in the fair value hierarchy within which the entire fair value measurement falls is based on the lowest level of input that is significant to the fair value measurement in its entirety. The Company’s assessment of the significance of the particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

The following tables set forth the assets and liabilities that we measure at fair value on a recurring and non-recurring basis by their levels in the fair value hierarchy at September 30, 2013 and December 31, 2012 (in thousands):



	September 30, 2013
	Total		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	32,863	$	3,109	$	26,346	$	3,408
Liabilities:
Interest rate swap agreements (included in accrued interest payable and other liabilities	$	1,465	—		$	1,465	—



	December 31, 2012
	Total		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	21,429	$	2,202	$	15,575	$	3,652
Liabilities:
Interest rate swap agreements (included in accrued interest payable and other liabilities	$	1,959	—		$	1,959	—

We determine impairment in real estate investments and debt and preferred equity investments, including intangibles utilizing cash flow projections that apply estimated revenue and expense growth rates, discount rates and capitalization rates, which are classified as Level 3 inputs.

The fair value of derivative instruments is based on current market data received from financial sources that trade such instruments and are based on prevailing market data and derived from third party proprietary models based on well-recognized financial principles and reasonable estimates about relevant future market conditions, which are classified as Level 2 inputs.

The financial assets and liabilities that are not measured at fair value on our consolidated balance sheets include cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses, debt and preferred equity investments, and mortgages and other loans payable and other secured and unsecured debt. The carrying amount of cash and cash equivalents, restricted cash, accounts receivable, and accounts payable and accrued expenses reported in our consolidated balance sheets approximates fair value due to the short term nature of these instruments. The fair value of debt and preferred equity investments, which is classified as Level 3, is estimated by discounting the future cash flows using current interest rates at which similar loans with the same maturities would be made to borrowers with similar credit ratings. The fair value of borrowings, which is classified as Level 3, is estimated by discounting the contractual cash flows of each debt to their present value using adjusted market interest rates, which is provided by a third-party specialist.

The following table provides the carrying value and fair value of these financial instruments as of September 30, 2013 and December 31, 2012 (in thousands):



	September 30, 2013				December 31, 2012
	Carrying Value		Fair Value		Carrying Value		Fair Value

Debt and preferred equity investments	$	1,315,551	(1)		$	1,348,434	(1)

Fixed rate debt	$	5,606,449	$	5,979,568	$	4,922,725	$	5,334,244
Variable rate debt	1,213,178		1,235,108		1,597,695		1,557,494
	$	6,819,627	$	7,214,676	$	6,520,420	$	6,891,738

_____________________________________


(1)	Debt and preferred equity investments had an estimated fair value ranging between $1.3 billion and $1.4 billion at September 30, 2013. At December 31, 2012, the debt and preferred equity investments had an estimated fair value ranging between $1.3 billion and $1.4 billion.

Disclosure about fair value of financial instruments is based on pertinent information available to us as of September 30, 2013. Although we are not aware of any factors that would significantly affect the reasonable fair value amounts, such amounts have not been comprehensively revalued for purposes of these financial statements since that date and current estimates of fair value may differ significantly from the amounts presented herein.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13504-108611

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15B
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44A, 44B
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 17-22, 27, 28
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-Subparagraph a-d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15C, 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 157
-Paragraph 32, 33, 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 3, 10, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Financial Instruments: Derivatives and Hedging

9 Months Ended

Sep. 30, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Financial Instruments: Derivatives and Hedging

In the normal course of business, we use a variety of commonly used derivative instruments, such as interest rate swaps, caps, collar and floors, to manage, or hedge interest rate risk. We hedge our exposure to variability in future cash flows for forecasted transactions in addition to anticipated future interest payments on existing debt. We recognize all derivatives on the balance sheet at fair value. Derivatives that are not hedges are adjusted to fair value through earnings. If a derivative is a hedge, depending on the nature of the hedge, changes in the fair value of the derivative will either be offset against the change in fair value of the hedged asset, liability, or firm commitment through earnings, or recognized in other comprehensive income until the hedged item is recognized in earnings. The ineffective portion of a derivative’s change in fair value will be immediately recognized in earnings. Reported net income and equity may increase or decrease prospectively, depending on future levels of interest rates and other variables affecting the fair values of derivative instruments and hedged items, but will have no effect on cash flows. Currently, all of our designated derivative instruments are effective hedging instruments.

The following table summarizes the notional and fair value of our derivative financial instruments at September 30, 2013 based on Level 2 inputs. The notional value is an indication of the extent of our involvement in these instruments at that time, but does not represent exposure to credit, interest rate or market risks (amounts in thousands):



	Notional Value		Strike Rate		Effective Date	Expiration Date	Balance Sheet Location	Fair Value
Interest Rate Cap	$	271,912	6.000	%	November 2012	November 2013	Other Liabilities	$	—
Interest Rate Swap	$	30,000	2.295	%	July 2010	June 2016	Other Liabilities	(1,412		)
Interest Rate Swap	$	8,500	0.740	%	February 2012	February 2015	Other Liabilities	(53		)
								$	(1,465	)

Gains and losses on terminated hedges are included in the accumulated other comprehensive loss, and are recognized into earnings over the term of the related mortgage obligation. Over time, the realized and unrealized gains and losses held in accumulated other comprehensive loss will be reclassified into earnings as an adjustment to interest expense in the same periods in which the hedged interest payments affect earnings. We estimate that approximately $2.7 million of the current balance held in accumulated other comprehensive loss will be reclassified into interest expense and $5.0 million of the portion related to our share of joint venture accumulated other comprehensive loss will be reclassified into equity in net income (loss) from unconsolidated joint ventures within the next 12 months.

The following table presents the effect of our derivative financial instruments and our share of our joint ventures' derivative financial instruments that are designated and qualify as hedging instruments on the consolidated statements of income for the three months ended September 30, 2013 and 2012, respectively (in thousands):



	Amount of Gain or (Loss) Recognized in Other Comprehensive Loss (Effective Portion)						Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)				Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain or (Loss) or Recognized into Income (Ineffective Portion)
	Three Months Ended September 30,							Three Months Ended September 30,				Location of Gain (Loss) Recognized in Income on Derivative	Three Months Ended September 30,
Derivative	2013			2012				2013		2012			2013		2012
Interest Rate Swaps/Caps	$	(160	)	$	(278	)	Interest expense	$	320	$	468	Interest expense	$	2	$	(1	)
Share of unconsolidated joint ventures' derivative instruments	(2,606		)	(3,074		)	Equity in net income (loss) from unconsolidated joint ventures	1,281		2,782		Equity in net income (loss) from unconsolidated joint ventures	5		—
	$	(2,766	)	$	(3,352	)		$	1,601	$	3,250		$	7	$	(1	)

The following table presents the effect of our derivative financial instruments and our share of our joint ventures' derivative financial instruments that are designated and qualify as hedging instruments on the consolidated statements of income for the nine months ended September 30, 2013 and 2012, respectively (in thousands):



	Amount of Gain or (Loss) Recognized in Other Comprehensive Loss (Effective Portion)						Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)				Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain or (Loss) Recognized in Income (Ineffective Portion)
	Nine Months Ended September 30,							Nine Months Ended September 30,				Location of Gain (Loss) Recognized in Income on Derivative	Nine Months Ended September 30,
Derivative	2013			2012				2013		2012			2013		2012
Interest Rate Swaps/Caps	$	(20	)	$	(901	)	Interest expense	$	1,258	$	1,394	Interest expense	$	2	$	—
Share of unconsolidated joint ventures' derivative instruments	5,503			(9,404		)	Equity in net income (loss) from unconsolidated joint ventures	3,781		8,276		Equity in net income (loss) from unconsolidated joint ventures	—		—
	$	5,483		$	(10,305	)		$	5,039	$	9,670		$	2	$	—

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

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+ Details

Commitments and Contingencies

9 Months Ended

Sep. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Legal Proceedings

We and the Operating Partnership are not presently involved in any material litigation nor, to our knowledge, is any material litigation threatened against us or our properties, other than routine litigation arising in the ordinary course of business. Management believes the costs, if any, incurred by us related to this litigation will not materially affect our financial position, operating results or liquidity.

Environmental Matters

Our management believes that the properties are in compliance in all material respects with applicable federal, state and local ordinances and regulations regarding environmental issues. Management is not aware of any environmental liability that it believes would have a materially adverse impact on our financial position, results of operations or cash flows. Management is unaware of any instances in which it would incur significant environmental cost if any of our properties were sold.

Capital and Ground Leases Arrangements

The following is a schedule of future minimum lease payments under capital leases and non-cancellable operating leases with initial terms in excess of one year as of September 30, 2013 (in thousands):



	Capital leases			Non-cancellable operating leases
2013 (3 months)	$	573		$	8,914
2014	2,293			35,655
2015	2,364			35,810
2016	2,543			36,251
2017	2,653			36,474
Thereafter	356,544			1,188,301
Total minimum lease payments	366,970			$	1,341,405
Less amount representing interest	(319,478		)
Present value of net minimum lease payments	$	47,492

Real Estate Purchase Commitment

In August 2013, we entered into a contract to acquire a mixed-use residential and commercial property located at 315 West 33rd Street for $386.0 million. This transaction is expected to be completed in the fourth quarter of 2013, subject to customary closing conditions.

- Definition

The entire disclosure for commitments and contingencies.

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+ Details

Segment Information

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Segment Information

We are a REIT engaged in owning, managing, leasing, acquiring and repositioning commercial properties in the New York Metropolitan area and have two reportable segments, real estate and debt and preferred equity. We evaluate real estate performance and allocate resources based on earnings contribution to income from continuing operations.

Our real estate portfolio is primarily located in the geographical markets of the New York Metropolitan area. The primary sources of revenue are generated from tenant rents and escalations and reimbursement revenue. Real estate property operating expenses consist primarily of security, maintenance, utility costs, real estate taxes and ground rent expense (at certain applicable properties). See Note 5, “Debt and Preferred Equity Investments,” for additional details on our debt and preferred equity investments.

Selected results of operations for the three and nine months ended September 30, 2013 and 2012, and selected asset information as of September 30, 2013 and December 31, 2012, regarding our operating segments are as follows (in thousands):



	Real Estate Segment			Debt and Preferred Equity Segment		Total Company
Total revenues
Three months ended:
September 30, 2013	$	319,317		$	44,448	$	363,765
September 30, 2012	329,142			27,869		357,011

Nine months ended:
September 30, 2013	$	950,491		$	143,887	$	1,094,378
September 30, 2012	948,475			87,655		1,036,130

Income (loss) from continuing operations before purchase price fair value adjustment and equity in net (loss) gain on sale of unconsolidated joint venture/real estate
Three months ended:
September 30, 2013	$	(5,885	)	$	36,382	$	30,497
September 30, 2012	10,214			22,272		32,486

Nine months ended:
September 30, 2013	$	(21,705	)	$	118,243	$	96,538
September 30, 2012	84,757			70,200		154,957

Total assets
As of:
September 30, 2013	$	13,247,401		$	1,327,518	$	14,574,919
December 31, 2012	13,021,095			1,357,890		14,378,985

Income from continuing operations represents total revenues less total expenses for the real estate segment and total investment income less allocated interest expense for the debt and preferred equity segment. Interest costs for the debt and preferred equity segment are imputed assuming 100% leverage at our 2012 credit facility borrowing cost as well as the interest under the MRA. We also allocate loan loss reserves, net of recoveries to the debt and preferred equity segment. We do not allocate marketing, general and administrative expenses and transaction related costs (totaling approximately $18.5 million, $64.2 million, $21.9 million and $65.9 million for the three and nine months ended September 30, 2013 and 2012, respectively) to the debt and preferred equity segment since we base performance on the individual segments prior to allocating marketing, general and administrative expenses. All other expenses, except interest, relate entirely to the real estate assets.

There were no transactions between the above two segments.

The table below reconciles income from continuing operations to net income for the three and nine months ended September 30, 2013 and 2012 (in thousands):



	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Income from continuing operations before purchase price fair value adjustment and equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	$	30,497		$	32,486		$	96,538		$	154,957
Purchase price fair value adjustment	—			—			(2,305		)	—
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(354		)	(4,807		)	(3,937		)	17,776
Income from continuing operations	30,143			27,679			90,296			172,733
Net income from discontinued operations	1,406			951			1,725			2,883
Gain on sale of discontinued operations	13,787			—			14,900			6,627
Net income	$	45,336		$	28,630		$	106,921		$	182,243

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2013
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events In October 2013, we closed on a 7-year, $275.0 million mortgage financing of 220 East 42nd Street. The floating rate mortgage bears interest at 160 basis points over the 30-day LIBOR. In November 2013, the Company completed an offering of 2,600,000 shares of its common stock, par value $0.01 per share, at a price of $95.94 per share. The Company received net proceeds of approximately $249.4 million, after deducting underwriting discounts (approximately $5.7 million). The Company also granted an option to the underwriter to purchase up to 390,000 additional shares of common stock at a price of $95.94 per share within 30 days from October 28, 2013.

Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2013
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include our accounts and those of our subsidiaries, which are wholly-owned or controlled by us. Entities which we do not control through our voting interest and entities which are variable interest entities, but where we are not the primary beneficiary, are accounted for under the equity method or as debt and preferred equity investments. See Note 5, “Debt and Preferred Equity Investments” and Note 6, “Investments in Unconsolidated Joint Ventures.” All significant intercompany balances and transactions have been eliminated. We consolidate variable interest entities, or VIEs, in which we are considered the primary beneficiary. The primary beneficiary of a VIE is the entity that has (i) the power to direct the activities that most significantly impact the entity’s economic performance and (ii) the obligation to absorb losses of the VIE or the right to receive benefits from the VIE that could be significant to the VIE. Included in commercial real estate properties on our consolidated balance sheets as of September 30, 2013 and December 31, 2012 are approximately $600.1 million and $607.4 million, respectively, related to our consolidated VIEs. Included in mortgages and other loans payable on our consolidated balance sheets as of September 30, 2013 and December 31, 2012 are approximately $373.1 million and $379.6 million, respectively, related to our consolidated VIEs. A noncontrolling interest in a consolidated subsidiary is defined as the portion of the equity (net assets) in a subsidiary not attributable, directly or indirectly, to a parent. Noncontrolling interests are required to be presented as a separate component of equity in the consolidated balance sheet and the presentation of net income was modified to present earnings and other comprehensive income attributed to controlling and noncontrolling interests. We assess the accounting treatment for each joint venture and debt and preferred equity investment. This assessment includes a review of each joint venture or limited liability company agreement to determine which party has what rights and whether those rights are protective or participating. For all VIE’s, we review such agreements in order to determine which party has the power to direct the activities that most significantly impact the entity’s economic performance. In situations where we and our partner approves, among other things, the annual budget, receives a detailed monthly reporting package from us, meets on a quarterly basis to review the results of the joint venture, reviews and approves the joint venture’s tax return before filing, and approves all leases that cover more than a nominal amount of space relative to the total rentable space at each property, we do not consolidate the joint venture as we consider these to be substantive participation rights that result in shared power of the activities that most significantly impact the performance of our joint venture. Our joint venture agreements typically contain certain protective rights such as the requirement of partner approval to sell, finance or refinance the property and the payment of capital expenditures and operating expenditures outside of the approved budget or operating plan.
Investment in Commercial Real Estate Properties	Investment in Commercial Real Estate Properties On a periodic basis, we assess whether there are any indications that the value of our real estate properties may be impaired or that their carrying value may not be recoverable. A property’s value is considered impaired if management’s estimate of the aggregate future cash flows (undiscounted and without interest charges for consolidated properties) to be generated by the property is less than the carrying value of the property. To the extent impairment has occurred, the loss will be measured as the excess of the carrying amount of the property over the calculated fair value of the property. We also evaluate our real estate properties for potential impairment when a real estate property has been classified as held for sale. Real estate assets held for sale are valued at the lower of their carrying value or fair value less costs to sell. In June 2013, we recorded a $2.2 million impairment charge in connection with the sale of 300 Main Street in Stamford, Connecticut. We assess our investments in unconsolidated joint ventures for recoverability, and if it is determined that a loss in value of the investment is other than temporary, we write down the investment to its fair value. We evaluate our equity investments for impairment based on the joint venture’s projected discounted cash flows. We do not believe that the values of any of our consolidated properties or equity investments were impaired at either September 30, 2013 or December 31, 2012. When we acquire equity interests in an existing unconsolidated joint venture and gain control over the investment, we record the consolidated investment at fair value. The difference between the book value of our equity investment on the purchase date and our share of the fair value of the investment’s purchase price is recorded as a purchase price fair value adjustment in our consolidated statements of income. In April 2013, we recognized a purchase price fair value adjustment of $(2.3) million in connection with the consolidation of 16 Court Street, which was previously accounted for as an investment in unconsolidated joint venture. We allocate the purchase price of real estate to land and building (inclusive of tenant improvements) and, if determined to be material, intangibles, such as the value of above- and below-market leases and origination costs associated with the in-place leases. We depreciate the amount allocated to building (inclusive of tenant improvements) and other intangible assets over their estimated useful lives, which generally range from three to 40 years and from one to 14 years, respectively. The values of the above- and below-market leases are amortized and recorded as either an increase (in the case of below-market leases) or a decrease (in the case of above-market leases) to rental income over the remaining term of the associated lease, which generally range from one to 14 years. The value associated with in-place leases is amortized over the expected term of the associated lease, which generally ranges from one to 14 years. If a tenant vacates its space prior to the contractual termination of the lease and no rental payments are being made on the lease, any unamortized balance of the related intangible will be written off. The tenant improvements and origination costs are amortized as an expense over the remaining life of the lease (or charged against earnings if the lease is terminated prior to its contractual expiration date). We assess fair value of the leases based on estimated cash flow projections that utilize appropriate discount and capitalization rates and available market information. Estimates of future cash flows are based on a number of factors including the historical operating results, known trends, and market/economic conditions that may affect the property. To the extent acquired leases contain fixed rate renewal options that are below market and determined to be material, we amortize such below market lease value into rental income over the renewal period.
Investment in Marketable Securities	Investment in Marketable Securities We invest in marketable securities. At the time of purchase, we are required to designate a security as held-to-maturity, available-for-sale, or trading depending on ability and intent. We do not have any securities designated as held-to-maturity or trading at this time. Securities available-for-sale are reported at fair value pursuant to ASC 820-10, with the net unrealized gains or losses reported as a component of accumulated other comprehensive loss. The cost of bonds and marketable securities sold was determined using the specific identification method.
Revenue Recognition	Revenue Recognition Rental revenue is recognized on a straight-line basis over the term of the lease. Rental revenue recognition commences when the tenant takes possession or controls the physical use of the leased space. In order for the tenant to take possession, the leased space must be substantially ready for its intended use. To determine whether the leased space is substantially ready for its intended use, management evaluates whether we are or the tenant is the owner of tenant improvements for accounting purposes. When management concludes that we are the owner of tenant improvements, rental revenue recognition begins when the tenant takes possession of the finished space, which is when such tenant improvements are substantially complete. In certain instances, when management concludes that we are not the owner (the tenant is the owner) of tenant improvements, rental revenue recognition begins when the tenant takes possession of or controls the space. When management concludes that we are the owner of tenant improvements for accounting purposes, management records amounts funded to construct the tenant improvements as a capital asset. For these tenant improvements, management records amounts reimbursed by tenants as a reduction of the capital asset. When management concludes that the tenant is the owner of tenant improvements for accounting purposes, management records our contribution towards those improvements as a lease incentive, which is included in deferred leasing costs on our consolidated balance sheets and amortized as a reduction to rental revenue on a straight-line basis over the term of the lease. The excess of rents recognized over amounts contractually due pursuant to the underlying leases are included in deferred rents receivable on the accompanying consolidated balance sheets. We establish, on a current basis, an allowance for future potential tenant credit losses, which may occur against this account. The balance reflected on the consolidated balance sheets is net of such allowance. In addition to base rent, our tenants also generally will pay their pro rata share of increases in real estate taxes and operating expenses for the building over a base year. In some leases, in lieu of paying additional rent based upon increases in building operating expenses, the tenant will pay additional rent based upon increases in the wage rate paid to porters over the porters’ wage rate in effect during a base year or increases in the consumer price index over the index value in effect during a base year. In addition, many of our leases contain fixed percentage increases over the base rent to cover escalations. Electricity is most often supplied by the landlord either on a sub-metered basis, or rent inclusion basis (i.e., a fixed fee is included in the rent for electricity, which amount may increase based upon increases in electricity rates or increases in electrical usage by the tenant). Base building services other than electricity (such as heat, air conditioning and freight elevator service during business hours, and base building cleaning) are typically provided at no additional cost, with the tenant paying additional rent only for services which exceed base building services or for services which are provided outside normal business hours. These escalations are based on actual expenses incurred in the prior calendar year. If the expenses in the current year are different from those in the prior year, then during the current year, the escalations will be adjusted to reflect the actual expenses for the current year. We record a gain on sale of real estate when title is conveyed to the buyer, subject to the buyer’s financial commitment being sufficient to provide economic substance to the sale and we have no substantial economic involvement with the buyer. Interest income on debt and preferred equity investments is recognized over the life of the investment using the effective interest method and recognized on the accrual basis. Fees received in connection with loan commitments are deferred until the loan is funded and are then recognized over the term of the loan as an adjustment to yield. Anticipated exit fees, whose collection is expected, are also recognized over the term of the loan as an adjustment to yield. Fees on commitments that expire unused are recognized at expiration. Income recognition is generally suspended for debt and preferred equity investments at the earlier of the date at which payments become 90 days past due or when, in the opinion of management, a full recovery of interest income and principal becomes doubtful. Interest income recognition is resumed when the loan becomes contractually current and performance is demonstrated to be resumed. Interest is recorded as income on impaired loans only to the extent cash is received. Several of the debt and preferred equity investments provide for accrual of interest at specified rates, which differ from current payment terms. Interest is recognized on such loans at the accrual rate subject to management’s determination that accrued interest and outstanding principal are ultimately collectible, based on the underlying collateral and operations of the borrower. If management cannot make this determination, interest income above the current pay rate is recognized only upon actual receipt. If we purchase a debt or preferred equity investment at a discount, intend to hold it until maturity and expect to recover the full value of the investment, we accrete the discount into income as an adjustment to yield over the term of the investment. If we purchase a debt or preferred equity investment at a discount with the intention of foreclosing on the collateral, we do not accrete the discount.
Reserve for Possible Credit Losses	Reserve for Possible Credit Losses The expense for possible credit losses in connection with debt and preferred equity investments is the charge to earnings to increase the allowance for possible credit losses to the level that we estimate to be adequate, based on Level 3 data, considering delinquencies, loss experience and collateral quality. Other factors considered relate to geographic trends and product diversification, the size of the portfolio and current economic conditions. Based upon these factors, we establish the provision for possible credit losses on each individual investment. When it is probable that we will be unable to collect all amounts contractually due, the investment is considered impaired. Where impairment is indicated on an investment that is held to maturity, a valuation allowance is measured based upon the excess of the recorded investment amount over the net fair value of the collateral. Any deficiency between the carrying amount of an asset and the calculated value of the collateral is charged to expense. The write-off of the reserve balance is called a charge off. We continue to assess or adjust our estimates based on circumstances of a loan and the underlying collateral. If the additional information obtained reflects increased recovery of our investment, we will adjust our reserves accordingly. We recorded no loan loss reserves during the three and nine months ended September 30, 2013. During the three and nine months ended September 30, 2012, we recorded loan loss reserves of zero and $3.0 million, respectively, on investments being held to maturity and approximately zero and $2.4 million, respectively, in recoveries in connection with the sale of our investments. This is included in loan loss and other investment reserves, net of recoveries in the accompanying consolidated statements of income. Debt and preferred equity investments held for sale are carried at the lower of cost or fair market value using available market information obtained through consultation with dealers or other originators of such investments as well as discounted cash flow models based on Level 3 data pursuant to ASC 820-10. As circumstances change, management may conclude not to sell an investment designated as held for sale. In such situations, the investment will be reclassified at its net carrying value to debt and preferred equity investments held to maturity. For these reclassified investments, the difference between the current carrying value and the expected cash to be collected at maturity will be accreted into income over the remaining term of the investment.
Income Taxes	Income Taxes SL Green is taxed as a REIT under Section 856(c) of the Code. As a REIT, SL Green generally is not subject to Federal income tax. To maintain its qualification as a REIT, SL Green must distribute at least 90% of its REIT taxable income to its stockholders and meet certain other requirements. If SL Green fails to qualify as a REIT in any taxable year, we will be subject to Federal income tax on SL Green's taxable income at regular corporate rates. SL Green may also be subject to certain state, local and franchise taxes. Under certain circumstances, Federal income and excise taxes may be due on SL Green's undistributed taxable income. The Operating Partnership is a partnership and, as a result, all income and losses of the partnership are allocated to the partners for inclusion in their respective income tax returns. The only provision for income taxes in the accompanying consolidated financial statements relates to the Operating Partnership’s consolidated taxable REIT subsidiaries. We may also be subject to certain state, local and franchise taxes. Pursuant to amendments to the Code that became effective January 1, 2001, we have elected, and may elect in the future, to treat certain of our existing or newly created corporate subsidiaries as taxable REIT subsidiaries, or a TRS. In general, our TRSs may perform non-customary services for our tenants, hold assets that we cannot hold directly and generally may engage in any real estate or non-real estate related business. Our TRSs generate income, resulting in Federal and state income tax liability for these entities. During the three and nine months ended September 30, 2013, we recorded Federal, state and local tax provisions of $2.1 million and $6.0 million, respectively. During the three and nine months ended September 30, 2012, we recorded Federal, state and local tax provisions of zero and less than $0.1 million, respectively. We follow a two-step approach for evaluating uncertain tax positions. Recognition (step one) occurs when an enterprise concludes that a tax position, based solely on its technical merits, is more-likely-than-not to be sustained upon examination. Measurement (step two) determines the amount of benefit that is more-likely-than-not to be realized upon settlement. Derecognition of a tax position that was previously recognized would occur when a company subsequently determines that a tax position no longer meets the more-likely-than-not threshold of being sustained. The use of a valuation allowance as a substitute for derecognition of tax positions is prohibited.
Stock-Based Employee Compensation Plans	Stock-Based Employee Compensation Plans We have a stock-based employee compensation plan, described more fully in Note 14, “Share-based Compensation.” Our stock options are recorded at fair value at the time of issuance. Fair value of the stock options is determined using the Black-Scholes option-pricing model. The Black-Scholes model was developed for use in estimating the fair value of traded options, which have no vesting restrictions and are fully transferable. In addition, option valuation models require the input of highly subjective assumptions including the expected stock price volatility. Because our plan has characteristics significantly different from those of traded options and because changes in the subjective input assumptions can materially affect the fair value estimate, in our opinion, the existing models do not necessarily provide a reliable single measure of the fair value of our employee stock options. Compensation cost for stock options, if any, is recognized ratably over the vesting period of the award. Our policy is to grant options with an exercise price equal to the quoted closing market price of our common stock on the grant date. Awards of stock or restricted stock are expensed as compensation over the benefit period based on the fair value of the stock on the grant date. For share-based awards with a performance or market measure, we recognize compensation cost over the requisite service period, using the accelerated attribution expense method. The requisite service period begins on the date the compensation committee of our board of directors authorizes the award, adopts any relevant performance measures and communicates the award to the employees. For programs with performance measures, the total estimated compensation cost is based on the fair value of the award at the applicable reporting date estimated using a binomial model. For share-based awards for which there is no pre-established performance measure, we recognize compensation cost over the service vesting period, which represents the requisite service period, on a straight-line basis. In accordance with the provisions of our share-based incentive compensation plans, we accept the return of shares of Company common stock, at the current quoted market price, from certain key employees to satisfy minimum statutory tax-withholding requirements related to shares that vested during the period. Awards can also be made in the form of a separate series of units of limited partnership interest in the Operating Partnership called long-term incentive plan units, or LTIP Units. LTIP Units, which can be granted either as free-standing awards or in tandem with other awards under our stock incentive plan, are valued by reference to the value of the Company's common stock at the time of grant, and are subject to such conditions and restrictions as the compensation committee of the Company's board of directors may determine, including continued employment or service, computation of financial metrics and/or achievement of pre-established performance goals and objectives.
Earnings per Share	Earnings per Share of the Company The Company presents both basic and diluted earnings per share, or EPS. Basic EPS excludes dilution and is computed by dividing net income attributable to common stockholders by the weighted average number of common stock outstanding during the period. Basic EPS includes participating securities, consisting of unvested restricted stock that receive nonforfeitable dividends similar to shares of common stock. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock, where such exercise or conversion would result in a lower EPS amount. Diluted EPS also includes units of limited partnership interest. The dilutive effect of stock options is reflected in the weighted average diluted outstanding shares calculation by application of the treasury stock method. There is no dilutive effect for the exchangeable senior debentures as the conversion premium will be paid in cash.
Earnings Per Unit	Earnings per Unit of the Operating Partnership The Operating Partnership presents both basic and diluted earnings per unit, or EPU. Basic EPU excludes dilution and is computed by dividing net income attributable to common unitholders by the weighted average number of common units outstanding during the period. Basic EPU includes participating securities, consisting of unvested restricted units that receive nonforfeitable dividends similar to shares of common units. Diluted EPU reflects the potential dilution that could occur if securities or other contracts to issue common units were exercised or converted into common units, where such exercise or conversion would result in a lower EPU amount. The dilutive effect of unit options is reflected in the weighted average diluted outstanding units calculation by application of the treasury stock method. There is no dilutive effect for the exchangeable senior notes as the conversion premium will be paid in cash.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Concentration of Credit Risk	Concentrations of Credit Risk Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash investments, debt and preferred equity investments and accounts receivable. We place our cash investments in excess of insured amounts with high quality financial institutions. The collateral securing our debt and preferred equity investments is located in the New York Metropolitan area. See Note 5, “Debt and Preferred Equity Investments.” We perform ongoing credit evaluations of our tenants and require most tenants to provide security deposits or letters of credit. Though these security deposits and letters of credit are insufficient to meet the total value of a tenant’s lease obligation, they are a measure of good faith and a source of funds to offset the economic costs associated with lost rent and the costs associated with re-tenanting the space. Although the properties in our real estate portfolio are primarily located in Manhattan, we also have Suburban properties located in Brooklyn, Long Island, Westchester County, Connecticut, Northern New Jersey and the west coast. The tenants located in our buildings operate in various industries. Other than three tenants who account for approximately 7.3%, 6.5% and 6.0% of our share of annualized cash rent, no other tenant in our portfolio accounted for more than 2.0% of our annualized cash rent, including our share of joint venture annualized cash rent for the three months ended September 30, 2013. Approximately 10%, 7% and 6% of our annualized cash rent for consolidated properties for the three months ended September 30, 2013 was attributable to 1515 Broadway, 1185 Avenue of the Americas and One Madison Avenue, respectively. In addition, one debt and preferred equity investment accounted for more than 10% of the income earned on debt and preferred equity investments during the three months ended September 30, 2013.
Reclassification	Reclassification Certain prior year balances have been reclassified to conform to our current year presentation primarily in order to eliminate discontinued operations from income from continuing operations and to reclassify deferred origination fees from deferred income to debt and preferred equity investments.
Accounting Standards Update	Accounting Standards Updates In February 2013, the FASB issued guidance on the presentation and disclosure of reclassification adjustments out of accumulated other comprehensive income, or AOCI. The standard requires an entity to present information about significant items reclassified out of AOCI by component either on the face of the statement where net income is presented or as a separate disclosure in the notes to financial statements. The guidance became effective for calendar year-end public companies beginning in the first quarter of 2013 and its adoption did not have a material impact on our consolidated financial statements.

Organization and Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of commercial office properties

Our investments in the New York Metropolitan area also include investments in Brooklyn, Long Island, Westchester County, Connecticut and Northern New Jersey, which are collectively known as the Suburban assets:



Location	Ownership	Number of Properties	Square Feet	Weighted Average Occupancy(1)
Manhattan	Consolidated properties	26	18,012,945	93.8	%
	Unconsolidated properties	9	5,934,434	96.2	%

Suburban	Consolidated properties	26	4,087,400	79.1	%
	Unconsolidated properties	4	1,222,100	85.3	%
		65	29,256,879	91.9	%

_________________________________


(1)	The weighted average occupancy represents the total leased square feet divided by total available rentable square feet.

Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Summary of identified intangible assets (acquired above-market leases and in-place leases) and intangible liabilities (acquired below-market leases)



	September 30, 2013			December 31, 2012
Identified intangible assets (included in other assets):
Gross amount	$	732,160		$	725,861
Accumulated amortization	(325,224		)	(263,107		)
Net	$	406,936		$	462,754

Identified intangible liabilities (included in deferred revenue):
Gross amount	$	667,495		$	651,921
Accumulated amortization	(411,814		)	(357,225		)
Net	$	255,681		$	294,696

Schedule of marketable securities

At September 30, 2013 and December 31, 2012, we held the following marketable securities (in thousands):



	September 30, 2013		December 31, 2012
Level 1 – Equity marketable securities	$	3,109	$	2,202
Level 2 – Commercial mortgage-backed securities	26,346		15,575
Level 3 – Rake bonds	3,408		3,652
Total marketable securities available-for-sale	$	32,863	$	21,429

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27198-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 19, 20, 21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 17
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-1
-Paragraph 21
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Property Acquisitions (Tables)

9 Months Ended

Sep. 30, 2013

Business Combinations [Abstract]

Schedule of allocation of the purchase price of the assets acquired and liabilities assumed

The following summarizes our allocation of the purchase price of the assets acquired and liabilities assumed upon the closing of this acquisition (in thousands):



	248-252 Bedford Avenue
Land	$	10,865
Building and building leasehold	44,035
Above market lease value	—
Acquired in-place leases	—
Other assets, net of other liabilities	—
Assets acquired	54,900

Fair value adjustment to mortgage note payable	—
Below market lease value	—
Liabilities assumed	—

Purchase price allocation	$	54,900

Net consideration funded by us at closing, excluding consideration financed by debt	$	21,782
Equity and/or debt investment held	$	—
Debt assumed	$	—

Property Dispositions (Tables)

9 Months Ended

Sep. 30, 2013

Discontinued Operations and Disposal Groups [Abstract]

Summary of income from discontinued operations

The following table summarizes income from discontinued operations for the three and nine months ended September 30, 2013 and 2012, respectively (in thousands):



	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013		2012
Revenues
Rental revenue	$	1,696		$	5,446		$	10,656	$	13,872
Escalation and reimbursement revenues	683			611			1,292		1,778
Other income (loss)	1			(376		)	8		(376		)
Total revenues	2,380			5,681			11,956		15,274
Operating expenses	660			2,065			3,643		4,930
Real estate taxes	187			302			765		916
Interest expense, net of interest income	130			696			461		1,627
Depreciable real estate reserves	—			—			2,150		—
Transaction related costs	(3		)	65			—		160
Depreciation and amortization	—			1,602			3,212		4,758
Total expenses	974			4,730			10,231		12,391
Net income from discontinued operations	$	1,406		$	951		$	1,725	$	2,883

- Definition

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

+ References + Details

Debt and Preferred Equity Investments (Tables)

9 Months Ended

Sep. 30, 2013

Investments, Debt and Equity Securities [Abstract]

Summary of debt investments

As of September 30, 2013 and December 31, 2012, we held the following debt investments with an aggregate weighted average current yield of approximately 11.3% at September 30, 2013 (in thousands):



Loan Type	September 30, 2013 Senior Financing		September 30, 2013 Carrying Value, Net of Discounts and Deferred Origination Fees			December 31, 2012 Carrying Value, Net of Discounts and Deferred Origination Fees			Initial Maturity Date
Other Loan	$	398,500	$	14,837		$	—		March 2015
Mezzanine Loan	205,000		67,740			66,307			February 2016
Mortgage/Mezzanine Loan	167,355		44,549			44,013			May 2016
Mezzanine Loan	177,000		15,226			15,906			May 2016
Junior Participation	133,000		49,000			49,000			June 2016
Mezzanine Loan	165,000		71,254			70,967			November 2016
Mortgage/Mezzanine Loan(1)	1,109,000		78,268			115,804			March 2017
Other Loan	15,000		3,500			3,500			September 2021
Mortgage(2)	—		—			218,068			—
Total fixed rate	$	2,369,855	$	344,374		$	583,565
Mortgage Loan	—		29,912			—			December 2013
Junior Participation(3)	57,750		10,869			10,869			February 2014
Junior Participation(4)	80,932		23,953			—			February 2014
Mortgage/Mezzanine Loan	330,000		131,595			131,231			July 2014
Mezzanine Loan(5)	62,500		37,394			37,288			July 2014
Mezzanine Loan	180,000		59,852			59,739			August 2014
Mortgage	—		14,855			14,745			September 2014
Mezzanine Loan(6)	87,374		37,365			34,444			October 2014
Mortgage/Mezzanine Loan(7)	—		53,258			47,253			February 2015
Mezzanine Loan	110,000		48,991			—			September 2015
Mezzanine Loan(8)	92,711		27,772			55,336			December 2015
Mezzanine Loan	775,000		72,585			—			March 2016
Mezzanine Loan(9)	160,000		22,515			7,624			June 2016
Mezzanine Loan	87,300		25,580			34,761			July 2016
Mortgage/Mezzanine Loan	72,000		20,558			—			July 2018
Total floating rate	$	2,095,567	$	617,054		$	433,290
Total	4,465,422		961,428			1,016,855
Loan loss reserve(10)			(4,000		)	(7,000		)
			$	957,428		$	1,009,855

_________________________________

(1)


(2)	In connection with the repayment of the loan in May 2013, we recognized additional income of $6.4 million, which is included in investment and preferred equity income on our consolidated statements of income.


(3)	In June 2013, the loan was extended to February 2014, subject to an additional four-month extension option.


(4)	As of September 30, 2013, we were committed to fund an additional $0.9 million in connection with this loan.


(5)	As a result of the transfer not meeting the conditions for sale accounting, the $5.0 million portion of the outstanding loan that was participated out has been recorded in other liabilities in the accompanying consolidated balance sheets.


(6)	As of September 30, 2013, we were committed to fund an additional $12.3 million in connection with this loan.


(7)	As of September 30, 2013, we were committed to fund an additional $5.2 million in connection with this loan.


(8)	We funded $56.3 million at origination. In June 2013, we sold 50% of our interest in the $85.0 million mezzanine loan. As of September 30, 2013, we were committed to fund an additional $13.6 million in connection with our share of this loan.

(9)


(10)	Loan loss reserves are specifically allocated to investments. Our reserves reflect management's judgment of the probability and severity of losses based on Level 3 data. We cannot be certain that our judgment will prove to be correct or that reserves will be adequate over time to protect against potential future losses.

Summary of preferred equity investments



Type	September 30, 2013 Senior Financing		September 30, 2013 Carrying Value, Net of Discounts and Deferred Origination Fees		December 31, 2012 Carrying Value, Net of Discounts and Deferred Origination Fees		Initial Mandatory Redemption
Preferred equity	$	70,000	$	9,937	$	9,927	October 2014
Preferred equity(1)(2)	525,000		107,723		99,768		July 2015
Preferred equity(1)(3)	55,986		24,426		18,925		April 2016
Preferred equity(1)	926,260		216,037		209,959		July 2016
	$	1,577,246	$	358,123	$	338,579

_________________________________


(1)	The difference between the pay and accrual rates is included as an addition to the principal balance outstanding.


(2)	The reserve previously taken against this loan is being accreted up to the face amount through the maturity date. In June 2013, the redemption date was extended from July 2014 to July 2015.


(3)	As of September 30, 2013, we were committed to fund an additional $1.4 million on this loan.

Rollforward of total allowance for loan loss reserves

The following table is a rollforward of our total loan loss reserves at September 30, 2013 and December 31, 2012 (in thousands):



	September 30, 2013			December 31, 2012
Balance at beginning of year	$	7,000		$	50,175
Expensed	—			3,000
Recoveries	—			(2,436		)
Charge-offs and reclassifications	(3,000		)	(43,739		)
Balance at end of period	$	4,000		$	7,000

Summary of impaired loans, which may include non-accrual loans

The following table presents impaired loans, which may include non-accrual loans, as of September 30, 2013 and December 31, 2012, respectively (in thousands):



	September 30, 2013						December 31, 2012
	Unpaid Principal Balance		Recorded Investment		Allowance Allocated		Unpaid Principal Balance		Recorded Investment		Allowance Allocated
With no related allowance recorded:
Commercial real estate	$	—	$	—	$	—	$	—	$	—	$	—
With an allowance recorded:
Commercial real estate	10,750		10,750		4,000		10,750		10,750		7,000

Total	$	10,750	$	10,750	$	4,000	$	10,750	$	10,750	$	7,000

Summary of average recorded investment in impaired loans, including non-accrual loans and the related investment and preferred equity income recognized



	Three Months Ended September 30,					Nine Months Ended September 30,
	2013		2012			2013		2012
Average recorded investment in impaired loans	$	10,890	$	40,304		$	10,877	$	63,391

Investment and preferred equity income recognized	3,316		(298		)	3,804		3,480

Investments in Unconsolidated Joint Ventures (Tables)

9 Months Ended

Sep. 30, 2013

Equity Method Investments and Joint Ventures [Abstract]

Schedule of general information on joint ventures

The table below provides general information on each of our joint ventures as of September 30, 2013 (amounts in thousands):



Property	Partner	Ownership Interest		Economic Interest		Square Feet	Acquired	Acquisition Price(1)
100 Park Avenue	Prudential	49.90	%	49.90	%	834	January 2000	$	95,800
21 West 34th Street	Sutton	50.00	%	50.00	%	30	July 2005	22,400
1604-1610 Broadway(2)	Onyx	70.00	%	70.00	%	30	November 2005	4,400
27-29 West 34th Street	Sutton	50.00	%	50.00	%	41	January 2006	30,000
717 Fifth Avenue	Sutton/Private Investor	10.92	%	10.92	%	120	September 2006	251,900
800 Third Avenue	Private Investors	42.95	%	42.95	%	526	December 2006	285,000
1745 Broadway	Witkoff/SITQ/Lehman Bros.	32.26	%	32.26	%	674	April 2007	520,000
1 and 2 Jericho Plaza	Onyx/Credit Suisse	20.26	%	20.26	%	640	April 2007	210,000
The Meadows	Onyx	50.00	%	50.00	%	582	September 2007	111,500
388 and 390 Greenwich Street(3)	SITQ	50.60	%	50.60	%	2,600	December 2007	1,575,000
180/182 Broadway(4)	Harel/Sutton	25.50	%	25.50	%	71	February 2008	43,600
600 Lexington Avenue	CPPIB	55.00	%	55.00	%	304	May 2010	193,000
11 West 34th Street	Private Investor/Sutton	30.00	%	30.00	%	17	December 2010	10,800
7 Renaissance	Cappelli	50.00	%	50.00	%	37	December 2010	4,000
3 Columbus Circle(5)	Moinian	48.90	%	48.90	%	769	January 2011	500,000
280 Park Avenue	Vornado	50.00	%	49.50	%	1,237	March 2011	400,000
1552-1560 Broadway(6)	Sutton	50.00	%	50.00	%	49	August 2011	136,550
747 Madison Avenue	Harel/Sutton	33.33	%	33.33	%	10	September 2011	66,250
724 Fifth Avenue	Sutton	50.00	%	50.00	%	65	January 2012	223,000
10 East 53rd Street	CPPIB	55.00	%	55.00	%	390	February 2012	252,500
33 Beekman(7)	Harel/Private Investor	45.90	%	45.90	%	145	August 2012	31,000
West Coast office portfolio(8)	Blackstone	42.02	%	43.74	%	4,067	September 2012	880,103
521 Fifth Avenue(9)	Plaza	50.50	%	50.50	%	460	November 2012	315,000
21 East 66th Street(10)	Private Investors	32.28	%	32.28	%	17	December 2012	75,000
315 West 36th Street	Private Investors	35.50	%	35.50	%	148	December 2012	45,000
Herald Center(11)	AG	40.00	%	40.00	%	365	January 2013	50,000

_________________________________


(1)	Acquisition price represents the actual or implied gross purchase price for the joint venture.


(2)	In March 2013, Sutton conveyed his interest in this property to us.


(3)	The property is subject to a triple-net lease arrangement with a single tenant, which expires in 2020.


(4)	In June 2013, the joint venture completed its redevelopment project and has conveyed a 30-year ground lease condominium interest in the building to Pace University, or Pace, its primary tenant.

(5)

(6)


(7)	The joint venture acquired the fee interest in the property and will develop an approximately 30 story building for student housing. Upon completion of the development, the joint venture will convey a long-term ground lease condominium interest in the building to Pace.

(8)


(9)	Following the sale of our 49.5% partnership interest in 521 Fifth Avenue, we deconsolidated the entity effective November 30, 2012 and have accounted for our investment under the equity method.


(10)	We hold a 32.28% interest in three retail and two residential units at the property and a 16.14% in four residential units at the property.


(11)	The joint venture acquired a preferred equity interest in an entity that holds the interest in a mixed commercial use property located in Manhattan. The preferred equity bears interest at a rate of 8.75% per annum and matures in June 2016.

Schedule of first mortgage notes payable collateralized by the respective joint venture properties and assignment of leases

The first mortgage notes and other loans payable collateralized by the respective joint venture properties and assignment of leases at September 30, 2013 and December 31, 2012, respectively, were as follows (amounts in thousands):



Property	Maturity Date	Interest Rate(1)		September 30, 2013		December 31, 2012
100 Park Avenue	September 2014	6.64	%	$	210,427	$	212,287
7 Renaissance	February 2015	10.00	%	1,276		856
11 West 34th Street	January 2016	4.82	%	17,279		17,491
280 Park Avenue	June 2016	6.57	%	708,525		710,000
21 West 34th Street	December 2016	5.76	%	100,000		100,000
1745 Broadway	January 2017	5.68	%	340,000		340,000
1 and 2 Jericho Plaza	May 2017	5.65	%	163,750		163,750
800 Third Avenue	August 2017	6.00	%	20,910		20,910
388 and 390 Greenwich Street(2)	December 2017	3.20	%	996,082		996,082
315 West 36th Street	December 2017	3.16	%	25,000		25,000
717 Fifth Avenue	July 2022	4.45	%	300,000		300,000
21 East 66th Street(3)	April 2023	3.60	%	12,000		12,000
717 Fifth Avenue	June 2024	9.00	%	301,520		294,509
1604-1610 Broadway(4)	—	5.66	%	27,000		27,000
Total fixed rate debt				$	3,223,769	$	3,219,885
180/182 Broadway(5)	December 2013	2.94	%	89,868		71,524
West Coast office portfolio(6)	September 2014	3.93	%	526,290		745,025
747 Madison Avenue	October 2014	2.96	%	33,125		33,125
The Meadows(7)	September 2015	7.75	%	58,212		57,000
3 Columbus Circle(8)	April 2016	2.37	%	241,264		247,253
1552 Broadway(9)	April 2016	3.47	%	143,430		113,869
Other loan payable	June 2016	1.09	%	30,000		30,000
724 Fifth Avenue	January 2017	2.54	%	120,000		120,000
10 East 53rd Street	February 2017	2.69	%	125,000		125,000
33 Beekman(10)	August 2017	2.94	%	18,362		18,362
600 Lexington Avenue	October 2017	2.27	%	121,570		124,384
388 and 390 Greenwich Street(2)	December 2017	1.18	%	142,297		142,297
27-29 West 34th Street(11)	May 2018	2.09	%	53,038		53,375
521 Fifth Avenue	November 2019	2.39	%	170,000		170,000
21 East 66th Street	June 2033	2.88	%	1,978		2,033
16 Court Street(12)				—		84,916
Total floating rate debt				$	1,874,434	$	2,138,163
Total joint venture mortgages and other loans payable				$	5,098,203	$	5,358,048

_________________________________


(1)	Effective weighted average interest rate for the three months ended September 30, 2013, taking into account interest rate hedges in effect during the period.

(2)


(3)	In April 2013, this loan was refinanced at par and its maturity was extended to April 2023.


(4)	This loan went into default in November 2009 due to the non-payment of debt service.


(5)	This loan has a committed amount of $90.0 million.


(6)	As a result of the sale of two of its properties, the joint venture paid down $194.5 million of its mortgage and $20.5 million of its mezzanine loan.


(7)	As of September 30, 2013, $1.8 million of the existing loan remained unfunded.

(8)


(9)	In April 2013, we refinanced the previous $119.6 million mortgage with a $200.0 million three-year loan construction financing facility comprised of a $170.0 million mortgage loan and a $30.0 million mezzanine loan. The facility has two one-year extension options. As of September 30, 2013, $44.2 million of the mortgage loan and $12.4 million of the mezzanine loan remained unfunded.


(10)	This loan has a committed amount of $75.0 million, which is recourse to us. Our partner has indemnified us for its pro rata share of the recourse guarantee. A portion of the guarantee terminates upon the joint venture reaching certain milestones. We believe it is unlikely that we will be required to perform under this guarantee.


(11)	In May 2013, this loan was refinanced and its maturity was extended to May 2018.


(12)	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest.

Schedule of combined balance sheets for the unconsolidated joint ventures

The combined balance sheets for the unconsolidated joint ventures, at September 30, 2013 and December 31, 2012, are as follows (in thousands):



	September 30, 2013		December 31, 2012
Assets
Commercial real estate property, net	$	6,566,636	$	6,910,991
Other assets	937,469		728,113
Total assets	$	7,504,105	$	7,639,104

Liabilities and members’ equity
Mortgages and other loans payable	$	5,098,203	$	5,358,048
Other liabilities	378,752		406,929
Members’ equity	2,027,150		1,874,127
Total liabilities and members’ equity	$	7,504,105	$	7,639,104
Company’s net investment in unconsolidated joint ventures	$	1,109,815	$	1,032,243

Schedule of combined statements of income for the unconsolidated joint ventures

The combined statements of income for the unconsolidated joint ventures for the three and nine months ended September 30, 2013 and 2012, respectively, are as follows (in thousands):



	Three Months Ended September 30,					Nine Months Ended September 30,
	2013			2012		2013			2012
Total revenues	$	156,571		$	120,121	$	462,776		$	364,587
Operating expenses	29,211			17,984		86,027			50,957
Ground rent	657			657		1,972			2,317
Real estate taxes	19,105			12,008		53,368			37,865
Interest expense, net of interest income	56,169			55,058		169,137			160,528
Amortization of deferred financing costs	2,869			2,338		12,454			7,009
Depreciation and amortization	49,402			35,242		144,552			107,749
Transaction related costs	—			934		—			1,292
Total expenses	157,413			124,221		467,510			367,717
Gain on early extinguishment of debt	—			21,421		—			21,421
Net (loss) income	$	(842	)	$	17,321	$	(4,734	)	$	18,291
Company’s equity in net income of unconsolidated joint ventures	$	2,939		$	11,658	$	4,251		$	80,988

Deferred Costs (Tables)

9 Months Ended

Sep. 30, 2013

Deferred Costs [Abstract]

Schedule of components of deferred costs

Deferred costs at September 30, 2013 and December 31, 2012 consisted of the following (in thousands):



	September 30, 2013			December 31, 2012
Deferred financing	$	149,888		$	152,596
Deferred leasing	304,135			285,931
	454,023			438,527
Less accumulated amortization	(206,173		)	(177,382		)
Deferred costs, net	$	247,850		$	261,145

Mortgages and Other Loans Payable (Tables)

9 Months Ended

Sep. 30, 2013

Mortgages and Other Loans Payable

Schedule of first mortgages and other loans payable collateralized by the respective properties and assignment of leases



Property	Maturity Date	Interest Rate(1)		September 30, 2013		December 31, 2012
609 Partners, LLC(2)	July 2014	5.00	%	$	23	$	23
125 Park Avenue	October 2014	5.75	%	146,250		146,250
711 Third Avenue	June 2015	4.99	%	120,000		120,000
625 Madison Avenue	November 2015	7.27	%	122,178		125,603
500 West Putnam	January 2016	5.52	%	23,665		24,060
420 Lexington Avenue	September 2016	7.15	%	183,443		184,992
Landmark Square	December 2016	4.00	%	83,309		84,486
485 Lexington Avenue	February 2017	5.61	%	450,000		450,000
120 West 45th Street	February 2017	6.12	%	170,000		170,000
762 Madison Avenue	February 2017	3.75	%	8,252		8,371
2 Herald Square	April 2017	5.36	%	191,250		191,250
885 Third Avenue	July 2017	6.26	%	267,650		267,650
Other loan payable(3)	September 2019	8.00	%	50,000		50,000
One Madison Avenue	May 2020	5.91	%	592,560		607,678
100 Church	July 2022	4.68	%	230,000		230,000
919 Third Avenue(4)	June 2023	5.12	%	500,000		500,000
400 East 57th Street	February 2024	4.13	%	70,000		70,000
400 East 58th Street	February 2024	4.13	%	30,000		30,000
1515 Broadway(5)	March 2025	3.93	%	900,000		—
300 Main Street(6)	—	—		—		11,500
220 East 42nd Street	—	—		—		185,906
Total fixed rate debt				$	4,138,580	$	3,457,769
16 Court Street(7)	October 2013	2.69	%	84,354		—
Master repurchase(8)	November 2013	3.19	%	131,966		116,667
180 Maiden Lane(9)	November 2016	2.38	%	264,858		271,215
248-252 Bedford Avenue	March 2018	2.44	%	22,000		—
1515 Broadway(5)	—	—		—		769,813
Total floating rate debt				$	503,178	$	1,157,695
Total mortgages and other loans payable				$	4,641,758	$	4,615,464

_________________________________


(1)	Effective weighted average interest rate for the three months ended September 30, 2013, taking into account interest rate hedges in effect during the period.


(2)	As part of an acquisition, the Operating Partnership issued 63.9 million units of its 5.0% Series E preferred units, or the Series E units, with a liquidation preference of $1.00 per unit. As of September 30, 2013, 63.8 million Series E units had been redeemed.


(3)	This loan is secured by a portion of a preferred equity investment.


(4)	We own a 51.0% controlling interest in the joint venture that is the borrower on this loan. This loan is non-recourse to us.


(5)	In February 2013, we refinanced the previous $775.0 million mortgage with a new $900.0 million 12-year mortgage and realized a net loss on early extinguishment of debt of approximately $18.5 million, including a prepayment penalty of $7.6 million.


(6)	The property was sold in September 2013.


(7)	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest. In October 2013, the maturity date of the loan was extended to December 2013.

(8)


(9)	In connection with this consolidated joint venture obligation, we executed a master lease agreement. Our partner has executed a contribution agreement to reflect its 50.1% share of the obligation under the master lease

Corporate Indebtedness (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Schedule of senior unsecured notes and other related disclosures by scheduled maturity date

The following table sets forth our senior unsecured notes and other related disclosures as of September 30, 2013 and December 31, 2012, respectively by scheduled maturity date (amounts in thousands):



Issuance	September 30, 2013 Unpaid Principal Balance		September 30, 2013 Accreted Balance		December 31, 2012 Accreted Balance		Coupon Rate(1)		Effective Rate		Term (in Years)	Maturity Date
August 13, 2004(2)(3)	$	75,898	$	75,898	$	75,898	5.88	%	5.88	%	10	August 15, 2014
March 31, 2006(2)(3)	255,308		255,194		255,165		6.00	%	6.00	%	10	March 31, 2016
October 12, 2010(4)	345,000		295,151		287,373		3.00	%	3.00	%	7	October 15, 2017
August 5, 2011(5)	250,000		249,666		249,620		5.00	%	5.00	%	7	August 15, 2018
March 16, 2010(5)	250,000		250,000		250,000		7.75	%	7.75	%	10	March 15, 2020
November 15, 2012(5)	200,000		200,000		200,000		4.50	%	4.50	%	10	December 1, 2022
June 27, 2005(2)(6)	7		7		7		4.00	%	4.00	%	20	June 15, 2025
March 26, 2007(7)	11,953		11,953		16,893		3.00	%	3.00	%	20	March 30, 2027
	$	1,388,166	$	1,337,869	$	1,334,956

_________________________________


(1)	Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.


(2)	Issued by ROP.


(3)	On December 27, 2012, we repurchased $42.4 million of aggregate principal amount of these notes, consisting of $22.7 million of the 5.875% Notes and $19.7 million of the 6.0% Notes, for a total consideration of $46.4 million and realized a net loss on early extinguishment of debt of approximately $3.8 million.

(4)


(5)	Issued by the Company, the Operating Partnership and ROP, as co-obligors.

(6)

(7)

Schedule of combined aggregate principal maturities



	Scheduled Amortization		Principal Repayments		Revolving Credit Facility		Trust Preferred Securities		Term Loan and Senior Unsecured Notes		Total		Joint Venture Debt
2013	$	10,093	$	216,320	$	—	$	—	$	—	$	226,413	$	77,387
2014	43,808		146,273		—		—		75,898		265,979		324,001
2015	47,028		229,537		—		—		7		276,572		41,085
2016	55,689		515,487		—		—		255,308		826,484		597,456
2017	61,213		1,086,579		—		—		356,953		1,504,745		930,713
Thereafter	311,611		1,918,121		340,000		100,000		1,100,000		3,769,732		198,805
	$	529,442	$	4,112,317	$	340,000	$	100,000	$	1,788,166	$	6,869,925	$	2,169,447

Schedule of consolidated interest expense, excluding capitalized interest

Consolidated interest expense, excluding capitalized interest, was comprised of the following (in thousands):



	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Interest expense	$	83,536		$	86,045		$	248,905		$	248,986
Interest income	(563		)	(386		)	(1,485		)	(1,197		)
Interest expense, net	$	82,973		$	85,659		$	247,420		$	247,789
Interest capitalized	$	2,828		$	3,360		$	9,191		$	8,892

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

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-Publisher FASB
-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

+ Details

Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of amounts due to/from related parties

Amounts due to/from related parties at September 30, 2013 and December 31, 2012 consisted of the following (in thousands):



	September 30, 2013		December 31, 2012
Due from joint ventures	$	2,128	$	511
Other	5,672		7,020
Related party receivables	$	7,800	$	7,531
Due to a joint venture (included in Accounts payable and accrued expenses)	$	—	$	(8,401	)

Noncontrolling Interests in Operating Partnership (Tables)

9 Months Ended

Sep. 30, 2013

Noncontrolling Interest [Abstract]

Schedule of activity relating to the noncontrolling interests in the operating partnership

Below is the rollforward analysis of the activity relating to the noncontrolling interests in the Operating Partnership (in thousands):



	Nine Months Ended September 30, 2013			Year Ended December 31, 2012
Balance at beginning of period	$	212,907		$	195,030
Distributions	(2,695		)	(3,296		)
Issuance of common units	14,270			42,239
Redemption of common units	(17,287		)	(87,513		)
Net income	1,909			5,597
Accumulated other comprehensive income (loss) allocation	490			(388		)
Fair value adjustment	38,452			61,238
Balance at end of period	$	248,046		$	212,907

Stockholders' Equity of the Company (Tables)

9 Months Ended

Sep. 30, 2013

Stockholders' Equity Note [Abstract]

Schedule of earnings per share calculation

Earnings per share for the three and nine months ended September 30, 2013 and 2012 is computed as follows (amounts in thousands):



	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator
Basic Earnings:
Income attributable to SL Green common stockholders	$	37,025	$	7,732	$	64,210	$	136,028
Effect of Dilutive Securities:
Redemption of units to common shares	1,110		567		1,909		4,876
Stock options	—		—		—		—
Diluted Earnings:
Income attributable to SL Green common stockholders	$	38,135	$	8,299	$	66,119	$	140,904



	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Denominator
Basic Earnings:
Weighted average common stock oustanding	91,988	90,241	91,684	88,929
Effect of Dilutive Securities:
Redemption of units to common stock	2,792	3,320	2,705	3,188
3.00% exchangeable senior notes due 2017	—	—	—	—
3.00% exchangeable senior notes due 2027	—	—	—	—
4.00% exchangeable senior debentures due 2025	—	—	—	—
Stock-based compensation plans	236	330	242	368
Diluted weighted average common stock outstanding	95,016	93,891	94,631	92,485

Partners' Capital of the Operating Partnership (Tables)

9 Months Ended

Sep. 30, 2013

Equity [Abstract]

Schedule of earnings per unit calculation

Earnings per Unit



	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Numerator
Basic Earnings:
Income attributable to SLGOP common unitholders	$	38,135	$	8,299	$	66,119	$	140,904
Effect of Dilutive Securities:
Stock options	—		—		—		—
Diluted Earnings:
Income attributable to SLGOP common unitholders	$	38,135	$	8,299	$	66,119	$	140,904



	Three Months Ended September 30,		Nine Months Ended September 30,
	2013	2012	2013	2012
Denominator
Basic Earnings:
Weighted average common units outstanding	94,780	93,561	94,389	92,117
Effect of Dilutive Securities:
3.00% exchangeable senior notes due 2017	—	—	—	—
3.00% exchangeable senior notes due 2027	—	—	—	—
4.00% exchangeable senior debentures due 2025	—	—	—	—
Stock-based compensation plans	236	330	242	368
Diluted weighted average common units outstanding	95,016	93,891	94,631	92,485

Share-based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of weighted average assumptions used to estimate the grant date fair value of options granted



	September 30, 2013		December 31, 2012
Dividend yield	1.95	%	2.00	%
Expected life of option	4.7 years		3.7 years
Risk-free interest rate	0.78	%	0.46	%
Expected stock price volatility	35.59	%	37.40	%

Summary of the status of stock options and changes during the period



	September 30, 2013					December 31, 2012
	Options Outstanding			Weighted Average Exercise Price		Options Outstanding			Weighted Average Exercise Price
Balance at beginning of year	1,201,000			$	75.05	1,277,200			$	63.37
Granted	246,000			79.58		361,331			75.36
Exercised	(184,919		)	51.62		(382,612		)	36.65
Lapsed or canceled	(33,202		)	83.61		(54,919		)	72.99
Balance at end of period	1,228,879			$	79.25	1,201,000			$	75.05

Options exercisable at end of period	506,903			$	87.48	479,913			$	86.85
Weighted average fair value of options granted during the period	$	4,999,225				$	6,602,967

Summary of restricted and change during the period

A summary of our restricted stock as of September 30, 2013 and December 31, 2012 and charges during the nine months ended September 30, 2013 and the year ended December 31, 2012 is presented below:



	September 30, 2013			December 31, 2012
Balance at beginning of year	2,804,901			2,912,456
Granted	9,867			92,729
Cancelled	(3,267		)	(200,284		)
Balance at end of period	2,811,501			2,804,901
Vested during the period	6,634			408,800
Compensation expense recorded	$	4,421,551		$	6,930,381
Weighted average fair value of restricted stock granted during the period	$	882,249		$	7,023,942

Accumulated Other Comprehensive Loss of the Company (Tables)

9 Months Ended

Sep. 30, 2013

SL Green Realty Corporation

Accumulated Other Comprehensive Income (Loss) [Line Items]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following tables set forth the changes in accumulated other comprehensive income (loss) by component:



	Nine Months Ended September 30, 2013
	Net unrealized loss on derivative instruments (1)			SL Green’s share of joint venture net unrealized loss on derivative instruments (2)			Unrealized gains and loss on marketable securities		Total
Beginning balance	$	(16,834	)	$	(16,063	)	$	3,310	$	(29,587	)
Other comprehensive (loss) income before reclassifications	(121		)	5,248			317		5,444
Amounts reclassified from accumulated other comprehensive income (loss)	1,222			3,672			—		4,894
Ending balance	$	(15,733	)	$	(7,143	)	$	3,627	$	(19,249	)

___________________________

(1)


(2)	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

Accumulated Other Comprehensive Loss of the Operating Partnership (Tables)

9 Months Ended

Sep. 30, 2013

SL Green Operating Partnership

Accumulated Other Comprehensive Income (Loss) [Line Items]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following tables set forth the changes in accumulated other comprehensive income (loss) by component:



	Nine Months Ended September 30, 2013
	Net unrealized loss on derivative instruments (1)			SLGOP’s share of joint venture net unrealized loss on derivative instruments (2)			Unrealized gains and loss on marketable securities		Total
Beginning balance	$	(17,438	)	$	(16,640	)	$	3,429	$	(30,649	)
Other comprehensive (loss) income before reclassifications	(20		)	5,503			306		5,789
Amounts reclassified from accumulated other comprehensive income (loss)	1,258			3,781			—		5,039
Ending balance	$	(16,200	)	$	(7,356	)	$	3,735	$	(19,821	)

___________________________

(1)


(2)	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

Fair Value Measurements Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Measurements [Abstract]

Fair Value Measurements, Recurring and Nonrecurring



	September 30, 2013
	Total		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	32,863	$	3,109	$	26,346	$	3,408
Liabilities:
Interest rate swap agreements (included in accrued interest payable and other liabilities	$	1,465	—		$	1,465	—



	December 31, 2012
	Total		Level 1		Level 2		Level 3
Assets:
Marketable securities	$	21,429	$	2,202	$	15,575	$	3,652
Liabilities:
Interest rate swap agreements (included in accrued interest payable and other liabilities	$	1,959	—		$	1,959	—

Fair Value, by Balance Sheet Grouping

The following table provides the carrying value and fair value of these financial instruments as of September 30, 2013 and December 31, 2012 (in thousands):



	September 30, 2013				December 31, 2012
	Carrying Value		Fair Value		Carrying Value		Fair Value

Debt and preferred equity investments	$	1,315,551	(1)		$	1,348,434	(1)

Fixed rate debt	$	5,606,449	$	5,979,568	$	4,922,725	$	5,334,244
Variable rate debt	1,213,178		1,235,108		1,597,695		1,557,494
	$	6,819,627	$	7,214,676	$	6,520,420	$	6,891,738

_____________________________________


(1)	Debt and preferred equity investments had an estimated fair value ranging between $1.3 billion and $1.4 billion at September 30, 2013. At December 31, 2012, the debt and preferred equity investments had an estimated fair value ranging between $1.3 billion and $1.4 billion.

- Definition

Tabular disclosure related to assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a recurring and/or nonrecurring basis in periods after initial recognition. Disclosures include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3) as well as transfers between levels 1 and 2.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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-Name Statement of Financial Accounting Standard (FAS)
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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+ Details

Financial Instruments: Derivatives and Hedging (Tables)

9 Months Ended

Sep. 30, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of notional and fair value of derivative financial instruments and foreign currency hedges



	Notional Value		Strike Rate		Effective Date	Expiration Date	Balance Sheet Location	Fair Value
Interest Rate Cap	$	271,912	6.000	%	November 2012	November 2013	Other Liabilities	$	—
Interest Rate Swap	$	30,000	2.295	%	July 2010	June 2016	Other Liabilities	(1,412		)
Interest Rate Swap	$	8,500	0.740	%	February 2012	February 2015	Other Liabilities	(53		)
								$	(1,465	)

Schedule of effect of derivative financial instruments on consolidated statements of income



	Amount of Gain or (Loss) Recognized in Other Comprehensive Loss (Effective Portion)						Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)				Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain or (Loss) or Recognized into Income (Ineffective Portion)
	Three Months Ended September 30,							Three Months Ended September 30,				Location of Gain (Loss) Recognized in Income on Derivative	Three Months Ended September 30,
Derivative	2013			2012				2013		2012			2013		2012
Interest Rate Swaps/Caps	$	(160	)	$	(278	)	Interest expense	$	320	$	468	Interest expense	$	2	$	(1	)
Share of unconsolidated joint ventures' derivative instruments	(2,606		)	(3,074		)	Equity in net income (loss) from unconsolidated joint ventures	1,281		2,782		Equity in net income (loss) from unconsolidated joint ventures	5		—
	$	(2,766	)	$	(3,352	)		$	1,601	$	3,250		$	7	$	(1	)

The following table presents the effect of our derivative financial instruments and our share of our joint ventures' derivative financial instruments that are designated and qualify as hedging instruments on the consolidated statements of income for the nine months ended September 30, 2013 and 2012, respectively (in thousands):



	Amount of Gain or (Loss) Recognized in Other Comprehensive Loss (Effective Portion)						Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income	Amount of Loss Reclassified from Accumulated Other Comprehensive Loss into Income (Effective Portion)				Location of Gain (Loss) Recognized in Income on Derivative	Amount of Gain or (Loss) Recognized in Income (Ineffective Portion)
	Nine Months Ended September 30,							Nine Months Ended September 30,				Location of Gain (Loss) Recognized in Income on Derivative	Nine Months Ended September 30,
Derivative	2013			2012				2013		2012			2013		2012
Interest Rate Swaps/Caps	$	(20	)	$	(901	)	Interest expense	$	1,258	$	1,394	Interest expense	$	2	$	—
Share of unconsolidated joint ventures' derivative instruments	5,503			(9,404		)	Equity in net income (loss) from unconsolidated joint ventures	3,781		8,276		Equity in net income (loss) from unconsolidated joint ventures	—		—
	$	5,483		$	(10,305	)		$	5,039	$	9,670		$	2	$	—

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References + Details

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

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+ Details

Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum lease payments under capital lease and non-cancellable operating leases



	Capital leases			Non-cancellable operating leases
2013 (3 months)	$	573		$	8,914
2014	2,293			35,655
2015	2,364			35,810
2016	2,543			36,251
2017	2,653			36,474
Thereafter	356,544			1,188,301
Total minimum lease payments	366,970			$	1,341,405
Less amount representing interest	(319,478		)
Present value of net minimum lease payments	$	47,492

Segment Information (Tables)

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Schedule of selected results of operations and selected asset information



	Real Estate Segment			Debt and Preferred Equity Segment		Total Company
Total revenues
Three months ended:
September 30, 2013	$	319,317		$	44,448	$	363,765
September 30, 2012	329,142			27,869		357,011

Nine months ended:
September 30, 2013	$	950,491		$	143,887	$	1,094,378
September 30, 2012	948,475			87,655		1,036,130

Income (loss) from continuing operations before purchase price fair value adjustment and equity in net (loss) gain on sale of unconsolidated joint venture/real estate
Three months ended:
September 30, 2013	$	(5,885	)	$	36,382	$	30,497
September 30, 2012	10,214			22,272		32,486

Nine months ended:
September 30, 2013	$	(21,705	)	$	118,243	$	96,538
September 30, 2012	84,757			70,200		154,957

Total assets
As of:
September 30, 2013	$	13,247,401		$	1,327,518	$	14,574,919
December 31, 2012	13,021,095			1,357,890		14,378,985

Schedule of reconciliation of income from continuing operations to net income attributable to SL Green common stockholders

The table below reconciles income from continuing operations to net income for the three and nine months ended September 30, 2013 and 2012 (in thousands):



	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
Income from continuing operations before purchase price fair value adjustment and equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	$	30,497		$	32,486		$	96,538		$	154,957
Purchase price fair value adjustment	—			—			(2,305		)	—
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(354		)	(4,807		)	(3,937		)	17,776
Income from continuing operations	30,143			27,679			90,296			172,733
Net income from discontinued operations	1,406			951			1,725			2,883
Gain on sale of discontinued operations	13,787			—			14,900			6,627
Net income	$	45,336		$	28,630		$	106,921		$	182,243

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Organization and Basis of Presentation (Details) - SL Green Operating Partnership [Member]	1 Months Ended	9 Months Ended
	Jun. 30, 1997	Sep. 30, 2013	Dec. 31, 2012
Organization
Percentage of ownership in SL Green Management LLC owned by operating partnership (as a percent)		100.00%
Noncontrolling interest in the operating partnership (as a percent)		2.94%	2.94%
Service Corporation
Organization
Economic interest in variable interest entity (as a percent)	95.00%

Organization and Basis of Presentation (Details 2)
$ in Thousands

9 Months Ended

Sep. 30, 2013

USD ($)

ft²

property

Dec. 31, 2012

USD ($)

Real estate properties

Number of properties (properties)

Area of property (in square foot) | ft²

29,256,879

Weighted Average Occupancy (as a percent)

^[1]

91.90%

Debt and preferred equity investments | $

$ 1,315,551

$ 1,348,434

Number of shares to be received on redemption of one unit of limited partnership interests (shares) | shares

Stand-alone retail properties

Real estate properties

Number of properties (properties)

Area of property (in square foot) | ft²

621,300

Development

Real estate properties

Number of properties (properties)

Area of property (in square foot) | ft²

2,424,600

Residential properties

Real estate properties

Number of properties (properties)

Area of property (in square foot) | ft²

497,100

Number of units (properties)

468

Land

Real estate properties

Number of properties (properties)

Area of property (in square foot) | ft²

961,400

Managed office properties

Real estate properties

Area of property (in square foot) | ft²

626,400

Number of office properties managed (properties)

Manhattan | Consolidated properties

Real estate properties

Number of properties (properties)

Area of property (in square foot) | ft²

18,012,945

Weighted Average Occupancy (as a percent)

^[1]

93.80%

Manhattan | Unconsolidated properties

Real estate properties

Number of properties (properties)

Area of property (in square foot) | ft²

5,934,434

Weighted Average Occupancy (as a percent)

^[1]

96.20%

Suburban | Consolidated properties

Real estate properties

Number of properties (properties)

Area of property (in square foot) | ft²

4,087,400

Weighted Average Occupancy (as a percent)

^[1]

79.10%

Suburban | Unconsolidated properties

Real estate properties

Number of properties (properties)

Area of property (in square foot) | ft²

1,222,100

Weighted Average Occupancy (as a percent)

^[1]

85.30%

West Coast | Office properties

Real estate properties

Number of properties (properties)

Area of property (in square foot) | ft²

3,654,300

[1]	The weighted average occupancy represents the total leased square feet divided by total available rentable square feet.

Significant Accounting Policies (Details) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Principles of Consolidation
Commercial real estate properties	$ 10,139,703	$ 10,269,630
Mortgages and other loans payable	4,641,758	4,615,464
Consolidated VIEs
Principles of Consolidation
Commercial real estate properties	600,100	607,400
Mortgages and other loans payable	$ 373,100	$ 379,600

Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013	Dec. 31, 2012
Investment in Commercial Real Estate Properties
Rental Revenue increase (decrease) for above-market leases and reductions in lease origination costs in excess of below-market leases		$ (1,500)
Above market rate mortgage and in-place lease balance, write-offs		6,800
Rental revenue increase (decrease) for below-market leases in excess of above-market leases and reductions in lease origination costs		5,300
Increase in rental revenue from amortization of acquired leases			$ 2,600	$ 8,500	$ 7,400
Increase/(reduction) in interest expense from amortization of above-market rate mortgages		(1,300)	$ (1,300)	(4,000)	$ (700)
Identified intangible assets (included in other assets):
Gross amount		732,160		732,160			$ 725,861
Accumulated amortization		(325,224)		(325,224)			(263,107)
Net		406,936		406,936			462,754
Identified intangible liabilities (included in deferred revenue):
Gross amount		667,495		667,495			651,921
Accumulated amortization		(411,814)		(411,814)			(357,225)
Net		255,681		255,681			$ 294,696
16 Court Street
Investment in Commercial Real Estate Properties
Purchase price fair value adjustment recognized	$ (2,300)
300 Main Street
Investment in Commercial Real Estate Properties
Impairment charge for assets held for sale		$ 2,200		$ 2,200		$ 2,200
In-place leases \| Minimum
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets				1 year
In-place leases \| Maximum
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets				14 years
Other intangible assets \| Minimum
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets				3 years
Other intangible assets \| Maximum
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets				40 years
Above-market leases \| Minimum
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets				1 year
Above-market leases \| Maximum
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets				14 years
Below-market leases \| Minimum
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets				1 year
Below-market leases \| Maximum
Investment in Commercial Real Estate Properties
Estimated useful life of other intangible assets				14 years
Buildings \| Minimum
Investment in Commercial Real Estate Properties
Estimated useful life				3 years
Buildings \| Maximum
Investment in Commercial Real Estate Properties
Estimated useful life				40 years

Significant Accounting Policies (Details 3) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Investment in Marketable Securities
Total marketable securities available-for-sale	$ 32,863	$ 32,863	$ 21,429
Level 1
Investment in Marketable Securities
Total marketable securities available-for-sale	3,109	3,109	2,202
Level 2
Investment in Marketable Securities
Total marketable securities available-for-sale	26,346	26,346	15,575
Level 3
Investment in Marketable Securities
Total marketable securities available-for-sale	3,408	3,408	3,652
Cost Basis	3,600	3,600	$ 3,700
Sale of securities	$ 0	$ 0

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

+ References + Details

Significant Accounting Policies (Details 4) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Accounting Policies [Abstract]
Days past due for income recognition on debt and preferred equity investments to be suspended			90 days
Loan loss reserves or charge-offs on investments being held to maturity	$ 0	$ 0	$ 0	$ (3,000)	$ (3,000)
Recoveries recorded		$ 0	$ 0	$ 2,400	$ 2,436

- Definition

The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.

+ References + Details

Significant Accounting Policies (Details 5) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Taxes
Minimum annual taxable income distributed to stockholders to maintain REIT qualification (as a percent)			90.00%
Federal, state and local tax provision	$ 2.1	$ 0.0	$ 6.0
Maximum
Income Taxes
Federal, state and local tax provision				$ 0.1

Significant Accounting Policies (Details 6)	3 Months Ended	9 Months Ended
Significant Accounting Policies (Details 6)	Sep. 30, 2013 investment	Sep. 30, 2013 Tenant
Customer concentration
Concentration of Credit Risk
Number of tenants (tenants) \| Tenant		3
Credit concentration
Concentration of Credit Risk
Number of investments (investments) \| investment	1
Minimum revenue on debt and preferred equity investments (as a percent)	10.00%
Annualized rent \| 1515 Broadway \| Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	10.00%
Annualized rent \| 1185 Avenue of the Americas \| Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	7.00%
Annualized rent \| One Madison Avenue \| Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)	6.00%
Annualized rent \| Three tenant \| Customer concentration
Concentration of Credit Risk
Maximum percentage of annualized rent for any one tenant not individually disclosed (percent)	2.00%	2.00%
Annualized rent \| Tenant 1 \| Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)		7.30%
Annualized rent \| Tenant 2 \| Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)		6.50%
Annualized rent \| Tenant 3 \| Customer concentration
Concentration of Credit Risk
Percentage of concentration (percent)		6.00%

Property Acquisitions (Details) $ in Thousands	1 Months Ended
Property Acquisitions (Details) $ in Thousands	Apr. 30, 2013 USD ($) ft²	Mar. 31, 2013 USD ($) property unit	Sep. 30, 2013 USD ($) ft²	Dec. 31, 2012 USD ($)
Property Acquisitions
Area of property (in square foot) \| ft²			29,256,879
Floating rate debt			$ 503,178	$ 1,157,695
16 Court Street
Property Acquisitions
Purchase price allocation	$ 4,000
Area of property (in square foot) \| ft²	318,000
Consolidated interests in acquiree	$ 96,200
Debt assumed	84,700
Purchase price fair value adjustment recognized	$ (2,300)
248-252 Bedford Avenue
Property Acquisitions
Purchase price allocation		$ 54,900
Number of units (properties) \| property		84
Number of apartment units acquired (units) \| unit		72
Number of townhouses acquired (units) \| unit		12
Ownership interest in consolidated joint venture (as a percent)		90.00%
248-252 Bedford Avenue \| Mortgage loan
Property Acquisitions
Term		5 years
Floating rate debt		$ 22,000
Interest rate added to base rate (as a percent)		2.25%
Interest rate, description		LIBOR

Property Acquisitions Property Acquisitions-Table (Details) - 248-252 Bedford Avenue $ in Thousands	Mar. 31, 2013 USD ($)
Property Acquisitions
Land	$ 10,865
Building and building leasehold	44,035
Above market lease value	0
Acquired in-place leases	0
Other assets, net of other liabilities	0
Assets acquired	54,900
Fair value adjustment to mortgage note payable	0
Below market lease value	0
Liabilities assumed	0
Purchase price allocation	54,900
Net consideration funded by us at closing, excluding consideration financed by debt	21,782
Equity and/or debt investment held	0
Debt assumed	$ 0

Property Dispositions (Details) - USD ($) $ in Thousands	1 Months Ended			3 Months Ended		9 Months Ended
Property Dispositions (Details) - USD ($) $ in Thousands	Sep. 30, 2013	Aug. 30, 2013	Feb. 28, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of property				$ 13,787	$ 0	$ 14,900	$ 6,627
Revenues
Rental revenue				1,696	5,446	10,656	13,872
Escalation and reimbursement revenues				683	611	1,292	1,778
Other income				1	(376)	8	(376)
Total revenues				2,380	5,681	11,956	15,274
Operating expense				660	2,065	3,643	4,930
Real estate taxes				187	302	765	916
Interest expense, net of interest income				130	696	461	1,627
Depreciable real estate reserves				0	0	2,150	0
Transaction related costs				(3)	65	0	160
Depreciation and amortization				0	1,602	3,212	4,758
Total expenses				974	4,730	10,231	12,391
Net income (loss) from discontinued operations				1,406	$ 951	1,725	$ 2,883
West 34th Street 333 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration for sale of property		$ 220,300
Gain on sale of property		13,800
Net proceeds from the sale		$ 211,000
300 Main Street
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration for sale of property	$ 13,500
Impairment charge for assets held for sale	$ 2,200			$ 2,200		$ 2,200		$ 2,200
West 44 Street 55 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration for sale of property			$ 6,300
Gain on sale of property			$ 1,100

Debt and Preferred Equity Investments (Details) - USD ($)
$ in Thousands

1 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

Jun. 30, 2013

May 31, 2013

Jan. 31, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Dec. 31, 2011

Debt investment

Increase in debt and preferred equity investments (net of discounts and deferred origination fees), including investments classified as held-for-sale

$ 497,400

$ 374,000

Decrease in debt and preferred equity investments (net of discounts), including investments classified as held-for-sale

530,200

288,300

Loan loss reserves

$ 0

$ 3,000

Aggregate weighted average current yield (as a percent)

11.30%

Senior Financing

4,465,422

$ 4,465,422

Loan loss reserve

(4,000)

(7,000)

$ (50,175)

Debt investment

Debt investment

Carrying value, net of discounts

961,428

1,016,855

Loan loss reserve

^[1]

(4,000)

(7,000)

Total, net of reserve

957,428

1,009,855

Fixed rate debt

Debt investment

Senior Financing

2,369,855

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

344,374

583,565

Other loan with an initial maturity of March 2015

Debt investment

Senior Financing

398,500

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

14,837

Mezzanine loan with an initial maturity date of February 2016

Debt investment

Senior Financing

205,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

67,740

66,307

Mortgage/Mezzanine loan with an initial maturity date of May 2016

Debt investment

Senior Financing

167,355

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

44,549

44,013

Mezzanine loan with an initial maturity date of May 2016

Debt investment

Senior Financing

177,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

15,226

15,906

Junior participation with an initial maturity date of June 2016

Debt investment

Senior Financing

133,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

49,000

Mezzanine loan with an initial maturity date of November 2016

Debt investment

Senior Financing

165,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

71,254

70,967

Mortgage/Mezzanine loan with an initial maturity date of March 2017

Debt investment

Senior Financing

^[2]

1,109,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

^[2]

78,268

115,804

Percentage of loan sold (percent)

50.00%

Amount recovered from sale of loan

$ 57,800

Additional income recognized on sale

$ 12,900

Other loan with an initial maturity of September 2021

Debt investment

Senior Financing

15,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

3,500

Mortgage

Debt investment

Senior Financing

^[3]

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

^[3]

218,068

Additional income recognized on sale

$ 6,400

Total floating rate

Debt investment

Senior Financing

2,095,567

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

617,054

433,290

Mezzanine loan with an initial maturity date of December 2013

Debt investment

Senior Financing

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

29,912

Junior participation with an initial maturity date of June 2013 extended to February 2014

Debt investment

Senior Financing

^[4]

57,750

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

^[4]

10,869

Extension term (extension term)

4 months

Junior participation with an initial maturity date of February 2014

Debt investment

Senior Financing

^[5]

80,932

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

^[5]

23,953

Additional commitments to fund in connection with loan

900

Mortgage/Mezzanine Loan with an initial maturity date of July 2014

Debt investment

Senior Financing

330,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

131,595

131,231

Mezzanine loan with an initial maturity date of July 2014

Debt investment

Senior Financing

^[6]

62,500

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

^[6]

37,394

37,288

Mezzanine loan with an initial maturity date of August 2014

Debt investment

Senior Financing

180,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

59,852

59,739

Mortgage with initial maturity date of September 2014

Debt investment

Senior Financing

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

14,855

14,745

Mezzanine Loan with initial maturity date of October 2014

Debt investment

Senior Financing

^[7]

87,374

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

^[7]

37,365

34,444

Additional commitments to fund in connection with loan

12,300

Mortgage/Mezzanine loan with an initial maturity date of February 2015

Debt investment

Senior Financing

^[8]

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

^[8]

53,258

47,253

Additional commitments to fund in connection with loan

5,200

Mezzainine Loan with an Initial Maturity Date of September 2015 [Member]

Debt investment

Senior Financing

110,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

48,991

Mezzanine loan with an initial maturity date of December 2015

Debt investment

Senior Financing

^[9]

92,711

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

^[9]

27,772

55,336

Percentage of loan sold (percent)

50.00%

Value of mortgage

$ 85,000

Additional commitments to fund in connection with loan

13,600

Amount funded in origination

56,300

Mortgage with initial maturity date of March 2016

Debt investment

Senior Financing

775,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

72,585

Mezzanine loan with an initial maturity date of June 2016

Debt investment

Senior Financing

^[10]

160,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

^[10]

22,515

7,624

Value of mortgage

30,000

Loan Participation Amount included in Other assets and/or Other liabilities

7,400

Repayments of debt

$ 15,000

Mezzanine loan with an initial maturity date of July 2016

Debt investment

Senior Financing

87,300

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

25,580

34,761

Mortgage/Mezzanine Loan with an initial maturity date of July 2018

Debt investment

Senior Financing

72,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

20,558

$ 0

Other Liabilities [Member] | Mezzanine loan with an initial maturity date of July 2014

Debt investment

Loan Participation Amount included in Other assets and/or Other liabilities

^[6]

$ 5,000

[1]	Loan loss reserves are specifically allocated to investments. Our reserves reflect management's judgment of the probability and severity of losses based on Level 3 data. We cannot be certain that our judgment will prove to be correct or that reserves will be adequate over time to protect against potential future losses.
[2]	Interest is added to the principal balance for this accrual only loan. In January 2013, we sold 50% of the mezzanine loan for $57.8 million and recognized additional income of $12.9 million, which is included in investment and preferred equity income on the consolidated statements of income. The unaccrued interest during the period in which the loan was on non-accrual status is being accreted as of January 2013.
[3]	In connection with the repayment of the loan in May 2013, we recognized additional income of $6.4 million, which is included in investment and preferred equity income on our consolidated statements of income.
[4]	In June 2013, the loan was extended to February 2014, subject to an additional four-month extension option.
[5]	As of September 30, 2013, we were committed to fund an additional $0.9 million in connection with this loan.
[6]	As a result of the transfer not meeting the conditions for sale accounting, the $5.0 million portion of the outstanding loan that was participated out has been recorded in other liabilities in the accompanying consolidated balance sheets.
[7]	As of September 30, 2013, we were committed to fund an additional $12.3 million in connection with this loan.
[8]	As of September 30, 2013, we were committed to fund an additional $5.2 million in connection with this loan.
[9]	We funded $56.3 million at origination. In June 2013, we sold 50% of our interest in the $85.0 million mezzanine loan. As of September 30, 2013, we were committed to fund an additional $13.6 million in connection with our share of this loan.
[10]	As part of the refinancing of the related senior mortgage in June 2013, we originated a $30.0 million mezzanine loan and our previous investment in the amount of $15.0 million, including the $7.4 million participated interest, was repaid in full. Following the refinancing, we entered into a loan participation agreement in the amount of $7.4 million on this $30.0 million mezzanine loan. Due to our continued involvement with the loan, the portion that was participated out has been recorded in other assets and other liabilities in the accompanying consolidated balance sheets.

Debt and Preferred Equity Investments (Details 2) - USD ($)
$ in Thousands

9 Months Ended

Sep. 30, 2013

Dec. 31, 2012

Preferred equity investment

Aggregate weighted average current yield (as a percent)

11.30%

Senior Financing

$ 4,465,422

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

$ 1,315,551

$ 1,348,434

Preferred equity investments

Preferred equity investment

Aggregate weighted average current yield (as a percent)

10.90%

Senior Financing

$ 1,577,246

Carrying Value, Net of Discounts and Deferred Origination Fees, at fixed rate

358,123

338,579

Preferred equity with initial mandatory redemption on October, 2014

Preferred equity investment

Senior Financing

70,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

9,937

9,927

Preferred equity with initial mandatory redemption on July, 2015

Preferred equity investment

Senior Financing

^[1],[2]

525,000

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

^[1],[2]

107,723

99,768

Preferred equity with initial mandatory redemption on April, 2016

Preferred equity investment

Senior Financing

^[1],[3]

55,986

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

^[1],[3]

24,426

18,925

Additional commitments to fund in connection with loan

1,400

Preferred equity with initial mandatory redemption on July, 2016

Preferred equity investment

Senior Financing

^[1]

926,260

Carrying Value, Net of Discounts and Deferred Origination Fees, at floating rate

^[1]

$ 216,037

$ 209,959

[1]	The difference between the pay and accrual rates is included as an addition to the principal balance outstanding.
[2]	The reserve previously taken against this loan is being accreted up to the face amount through the maturity date. In June 2013, the redemption date was extended from July 2014 to July 2015.
[3]	As of September 30, 2013, we were committed to fund an additional $1.4 million on this loan.

Debt and Preferred Equity Investments (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Loan loss reserve activity
Balance at beginning of year			$ 7,000	$ 50,175	$ 50,175
Expensed	$ 0	$ 0	0	3,000	3,000
Recoveries		$ 0	0	$ (2,400)	(2,436)
Charge-offs and reclassifications			(3,000)		(43,739)
Balance at end of period	$ 4,000		$ 4,000		$ 7,000

- Definition

+ References + Details

Debt and Preferred Equity Investments (Details 4) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2013 USD ($) segment	Sep. 30, 2012 USD ($)	Dec. 31, 2012 USD ($) segment
Impaired loans, including non-accrual loans
Number of portfolio segments of financial receivables (segments) \| segment			1		1
Additional amount of financing receivables included in other assets	$ 145,800		$ 145,800		$ 121,300
Average recorded investment in impaired loans	10,890	$ 40,304	10,877	$ 63,391
Investment and preferred equity income (loss) recognized	3,316	$ (298)	3,804	$ 3,480
Class of financing receivable
Impaired loans, including non-accrual loans
No related allowance, unpaid principal balance	0		0		0
No related allowance, recorded investment	0		0		0
No related allowance, related allowance	0		0		0
With related allowance, unpaid principal balance	10,750		10,750		10,750
With related allowance, recorded investment	10,750		10,750		10,750
With related allowance, related allowance	4,000		4,000		7,000
Impaired financing receivable, unpaid principal balance	10,750		10,750		10,750
Impaired financing receivable, recorded investment	10,750		10,750		10,750
Impaired financing receivable, allowance allocated	$ 4,000		$ 4,000		$ 7,000

Investments in Unconsolidated Joint Ventures (Details)
$ in Thousands

1 Months Ended

9 Months Ended

Feb. 28, 2013

Nov. 30, 2012

Sep. 30, 2012

USD ($)

Jun. 30, 2012

USD ($)

Sep. 30, 2013

USD ($)

ft²

entity

floor

property

unit

Jun. 30, 2013

Dec. 31, 2012

USD ($)

General information on each joint venture

Investments in unconsolidated joint ventures

$ 1,109,815

$ 1,032,243

Number of VIEs in which the entity is not primary beneficiary (entities) | entity

Net equity investment in VIEs in which the entity is not primary beneficiary

$ 136,700

117,700

Area of property (in square foot) | ft²

29,256,879

100 Park Avenue

General information on each joint venture

Ownership Interest (as a percent)

49.90%

Economic Interest (as a percent)

49.90%

Area of property (in square foot) | ft²

834,000

Acquisition Price

^[1]

$ 95,800

21 West 34th Street

General information on each joint venture

Ownership Interest (as a percent)

50.00%

Economic Interest (as a percent)

50.00%

Area of property (in square foot) | ft²

30,000

Acquisition Price

^[1]

$ 22,400

1604-1610 Broadway

General information on each joint venture

Ownership Interest (as a percent)

^[2]

70.00%

Economic Interest (as a percent)

^[2]

70.00%

Area of property (in square foot) | ft²

^[2]

30,000

Acquisition Price

^[1],[2]

$ 4,400

27-29 West 34th Street

General information on each joint venture

Ownership Interest (as a percent)

50.00%

Economic Interest (as a percent)

50.00%

Area of property (in square foot) | ft²

41,000

Acquisition Price

^[1]

$ 30,000

717 Fifth Avenue

General information on each joint venture

Equity Method Investments, Ownership Percentage Sold

50.00%

Ownership Interest (as a percent)

^[3]

10.92%

Economic Interest (as a percent)

^[3]

10.92%

Area of property (in square foot) | ft²

^[3]

120,000

Acquisition Price

^[1],[3]

$ 251,900

Additional cash income recognized due to distribution of refinancing proceeds

$ 67,900

800 Third Avenue

General information on each joint venture

Ownership Interest (as a percent)

42.95%

Economic Interest (as a percent)

42.95%

Area of property (in square foot) | ft²

526,000

Acquisition Price

^[1]

$ 285,000

1745 Broadway

General information on each joint venture

Ownership Interest (as a percent)

32.26%

Economic Interest (as a percent)

32.26%

Area of property (in square foot) | ft²

674,000

Acquisition Price

^[1]

$ 520,000

1 and 2 Jericho Plaza

General information on each joint venture

Ownership Interest (as a percent)

20.26%

Economic Interest (as a percent)

20.26%

Area of property (in square foot) | ft²

640,000

Acquisition Price

^[1]

$ 210,000

The Meadows

General information on each joint venture

Ownership Interest (as a percent)

50.00%

Economic Interest (as a percent)

50.00%

Area of property (in square foot) | ft²

582,000

Acquisition Price

^[1]

$ 111,500

388 and 390 Greenwich Street

General information on each joint venture

Ownership Interest (as a percent)

^[3]

50.60%

Economic Interest (as a percent)

^[3]

50.60%

Area of property (in square foot) | ft²

^[3]

2,600,000

Acquisition Price

^[1],[3]

$ 1,575,000

180/182 Broadway and 63 Nassu Street

General information on each joint venture

Ownership Interest (as a percent)

^[4]

25.50%

Economic Interest (as a percent)

^[4]

25.50%

Area of property (in square foot) | ft²

^[4]

71,000

Acquisition Price

^[1],[4]

$ 43,600

600 Lexington Avenue

General information on each joint venture

Ownership Interest (as a percent)

55.00%

Economic Interest (as a percent)

55.00%

Area of property (in square foot) | ft²

304,000

Acquisition Price

^[1]

$ 193,000

11 West 34th Street

General information on each joint venture

Ownership Interest (as a percent)

30.00%

Economic Interest (as a percent)

30.00%

Area of property (in square foot) | ft²

17,000

Acquisition Price

^[1]

$ 10,800

7 Renaissance

General information on each joint venture

Ownership Interest (as a percent)

50.00%

Economic Interest (as a percent)

50.00%

Area of property (in square foot) | ft²

37,000

Acquisition Price

^[1]

$ 4,000

3 Columbus Circle

General information on each joint venture

Ownership Interest (as a percent)

^[5]

48.90%

Economic Interest (as a percent)

^[5]

48.90%

Area of property (in square foot) | ft²

^[5]

769,000

Acquisition Price

^[1],[5]

$ 500,000

Gain recognized on sale of beneficial interest

$ 0

Committed additional capital contribution funded

$ 47,500

280 Park Avenue

General information on each joint venture

Ownership Interest (as a percent)

50.00%

Economic Interest (as a percent)

49.50%

Area of property (in square foot) | ft²

1,237,000

Acquisition Price

^[1]

$ 400,000

1552-1560 Broadway

General information on each joint venture

Ownership Interest (as a percent)

^[6]

50.00%

Economic Interest (as a percent)

^[6]

50.00%

Area of property (in square foot) | ft²

^[6]

49,000

Acquisition Price

^[1],[6]

$ 136,550

747 Madison Avenue

General information on each joint venture

Ownership Interest (as a percent)

33.33%

Economic Interest (as a percent)

33.33%

Area of property (in square foot) | ft²

10,000

Acquisition Price

^[1]

$ 66,250

724 Fifth Avenue

General information on each joint venture

Ownership Interest (as a percent)

50.00%

Economic Interest (as a percent)

50.00%

Area of property (in square foot) | ft²

65,000

Acquisition Price

^[1]

$ 223,000

10 East 53rd Street

General information on each joint venture

Ownership Interest (as a percent)

55.00%

Economic Interest (as a percent)

55.00%

Area of property (in square foot) | ft²

390,000

Acquisition Price

^[1]

$ 252,500

33 Beekman

General information on each joint venture

Ownership Interest (as a percent)

^[7]

45.90%

Economic Interest (as a percent)

^[7]

45.90%

Area of property (in square foot) | ft²

^[7]

145,000

Acquisition Price

^[1],[7]

$ 31,000

Number of floors of student housing | floor

West Coast office portfolio

General information on each joint venture

Ownership Interest (as a percent)

^[8]

42.02%

Economic Interest (as a percent)

^[8]

43.74%

Area of property (in square foot) | ft²

^[8]

4,067,000

Acquisition Price

^[1],[8]

$ 880,103

Partnership interest sold to a third party (as a percent)

20.78%

Ownership interest acquired (as a percent)

10.73%

6.00%

Number of properties sold | property

Proceeds from Sale of Property, Plant, and Equipment

$ 224,300

Gain (Loss) on Sale of Property Plant Equipment

2,100

Prior to the recapitalization positions held in mezzanine and preferred equity

$ 26,700

West Coast office portfolio | Mortgage loan

General information on each joint venture

Repaid loan

194,500

West Coast office portfolio | Mezzanine loans

General information on each joint venture

Repaid loan

$ 20,500

521 Fifth Avenue

General information on each joint venture

Ownership Interest (as a percent)

^[9]

50.50%

Economic Interest (as a percent)

^[9]

50.50%

Area of property (in square foot) | ft²

^[9]

460,000

Acquisition Price

^[1],[9]

$ 315,000

Partnership interest sold to a third party (as a percent)

49.50%

21 East 66th Street

General information on each joint venture

Ownership Interest (as a percent)

^[10]

32.28%

Economic Interest (as a percent)

^[10]

32.28%

Area of property (in square foot) | ft²

^[10]

17,000

Acquisition Price

^[1],[10]

$ 75,000

21 East 66th Street | Three retail units

General information on each joint venture

Ownership Interest (as a percent)

32.28%

Number of units in property | unit

21 East 66th Street | 2 residential units

General information on each joint venture

Number of units in property | unit

21 East 66th Street | Four residential units

General information on each joint venture

Ownership Interest (as a percent)

16.14%

Number of units in property | unit

315 West 36th Street

General information on each joint venture

Ownership Interest (as a percent)

35.50%

Economic Interest (as a percent)

35.50%

Area of property (in square foot) | ft²

148,000

Acquisition Price

^[1]

$ 45,000

Herald Center

General information on each joint venture

Ownership Interest (as a percent)

^[11]

40.00%

Economic Interest (as a percent)

^[11]

40.00%

Area of property (in square foot) | ft²

^[11]

365,000

Acquisition Price

^[1],[11]

$ 50,000

Interest rate, fixed rate debt (as a percent)

8.75%

1552 Broadway

General information on each joint venture

Area of property (in square foot) | ft²

13,045

Joint venture

General information on each joint venture

Investments in unconsolidated joint ventures

$ 1,109,815

$ 1,032,243

[1]	Acquisition price represents the actual or implied gross purchase price for the joint venture.
[2]	In March 2013, Sutton conveyed his interest in this property to us.
[3]	The property is subject to a triple-net lease arrangement with a single tenant, which expires in 2020.
[4]	In June 2013, the joint venture completed its redevelopment project and has conveyed a 30-year ground lease condominium interest in the building to Pace University, or Pace, its primary tenant.
[5]	We had an obligation to fund an additional $47.5 million to the joint venture which has been fully funded as of June 30, 2013. As a result of the sale of a condominium interest in September 2012, Young & Rubicam, Inc., or Y&R, owns a portion of the property, generally floors three through eight referred to as Y&R units. As the joint venture has an option to repurchase the Y&R units, no gain was recognized on this transaction.
[6]	In connection with this acquisition, the joint venture also acquired a long-term leasehold interest in the retail space and certain other spaces at 1560 Broadway, which is adjacent to 1552 Broadway. The purchase price relates only to the purchase of the 1552 Broadway interest which comprises 13,045 square feet. In 2012, we, along with Sutton, acquired the property at 155 West 46th Street, which is adjacent to 1552 and 1560 Broadway, and sold it to the fee owner of 1560 Broadway.
[7]	The joint venture acquired the fee interest in the property and will develop an approximately 30 story building for student housing. Upon completion of the development, the joint venture will convey a long-term ground lease condominium interest in the building to Pace.
[8]	Prior to the recapitalization in September 2012, the Company held $26.7 million in mezzanine and preferred equity positions in the entity that owned the portfolio. Following the recapitalization, Blackstone became the majority owner of the joint venture, with Equity Office Properties, a Blackstone affiliate, being responsible for the portfolio’s management and leasing. In February 2013, we acquired Gramercy’s 10.73% interest in the joint venture and simultaneously sold 20.78% of the newly acquired interest to Square Mile Capital Management LLC or Square Mile. During the nine months ended September 30, 2013, we acquired Square Mile’s 6.00% interest in the joint venture and the joint venture sold three of the properties for an aggregate of $224.3 million, on which we recognized a gain of approximately $2.1 million. The proceeds from the sale of these properties were used primarily to repay $194.5 million of the mortgage and $20.5 million of the mezzanine loan.
[9]	Following the sale of our 49.5% partnership interest in 521 Fifth Avenue, we deconsolidated the entity effective November 30, 2012 and have accounted for our investment under the equity method.
[10]	We hold a 32.28% interest in three retail and two residential units at the property and a 16.14% in four residential units at the property.
[11]	The joint venture acquired a preferred equity interest in an entity that holds the interest in a mixed commercial use property located in Manhattan. The preferred equity bears interest at a rate of 8.75% per annum and matures in June 2016.

Investments in Unconsolidated Joint Ventures (Details 2)
$ in Thousands

1 Months Ended

3 Months Ended

9 Months Ended

Apr. 30, 2013

USD ($)

extenstion_option

Feb. 28, 2013

Nov. 30, 2012

Aug. 31, 2012

USD ($)

Sep. 30, 2013

USD ($)

Sep. 30, 2012

USD ($)

Sep. 30, 2013

USD ($)

Sep. 30, 2012

USD ($)

Dec. 31, 2012

USD ($)

First mortgage notes and other loan payable

Total fixed rate debt

$ 4,138,580

$ 3,457,769

Total floating rate debt

503,178

1,157,695

Total joint venture mortgages and other loans payable

$ 4,641,758

4,615,464

717 Fifth Avenue | Mortgage loan

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

4.45%

Total fixed rate debt

$ 300,000

300,000

717 Fifth Avenue | Mezzanine loans

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

9.00%

Total fixed rate debt

$ 301,520

294,509

16 Court Street

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[2],[3]

2.69%

Total floating rate debt

^[3]

$ 84,354

Joint venture

First mortgage notes and other loan payable

Total fixed rate debt

3,223,769

3,219,885

Total floating rate debt

1,874,434

2,138,163

Total joint venture mortgages and other loans payable

5,098,203

5,358,048

Management, leasing, construction supervision and asset management services revenue

$ 3,500

$ 2,500

$ 7,500

$ 6,200

Joint venture | 100 Park Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

6.64%

Total fixed rate debt

$ 210,427

212,287

Joint venture | 7 Renaissance

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

10.00%

Total fixed rate debt

$ 1,276

856

Joint venture | 11 West 34th Street

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

4.82%

Total fixed rate debt

$ 17,279

17,491

Joint venture | 280 Park Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

6.57%

Total fixed rate debt

$ 708,525

710,000

Joint venture | 21 West 34th Street

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

5.76%

Total fixed rate debt

$ 100,000

100,000

Joint venture | 1745 Broadway

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

5.68%

Total fixed rate debt

$ 340,000

340,000

Joint venture | 1 and 2 Jericho Plaza

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

5.65%

Total fixed rate debt

$ 163,750

163,750

Joint venture | 800 Third Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

6.00%

Total fixed rate debt

$ 20,910

20,910

Joint venture | 388 and 390 Greenwich Street

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1],[4]

3.20%

Interest rate, floating rate debt (as a percent)

^[1],[4]

1.18%

Total fixed rate debt

^[4]

$ 996,082

996,082

Total floating rate debt

^[4]

142,297

Joint venture | 388 and 390 Greenwich Street | Mortgage loan

First mortgage notes and other loan payable

Total floating rate debt

72,000

Total joint venture mortgages and other loans payable

576,000

Joint venture | 388 and 390 Greenwich Street | Mezzanine loans

First mortgage notes and other loan payable

Total floating rate debt

70,300

Total joint venture mortgages and other loans payable

562,400

Maximum amount of loan recourse to entity

$ 200,000

Joint venture | 315 West 36th Street

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

3.16%

Total fixed rate debt

$ 25,000

25,000

Joint venture | 21 East 66th Street

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1],[5]

3.60%

Interest rate, floating rate debt (as a percent)

^[1]

2.88%

Total fixed rate debt

^[5]

$ 12,000

12,000

Total floating rate debt

$ 1,978

2,033

Joint venture | 1604-1610 Broadway

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1],[6]

5.66%

Total fixed rate debt

^[6]

$ 27,000

27,000

Joint venture | 180/182 Broadway and 63 Nassu Street

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1],[7]

2.94%

Total floating rate debt

^[7]

$ 89,868

71,524

Committed amount

$ 90,000

Joint venture | West Coast office portfolio

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1],[8]

3.93%

Total floating rate debt

^[8]

$ 526,290

745,025

Joint venture | 747 Madison Avenue

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1]

2.96%

Total floating rate debt

$ 33,125

33,125

Joint venture | The Meadows

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1],[9]

7.75%

Total floating rate debt

^[9]

$ 58,212

57,000

Gain (loss) on early extinguishment of debt

$ 10,800

Unfunded amount

$ 1,800

Joint venture | 3 Columbus Circle

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1],[10]

2.37%

Total floating rate debt

^[10]

$ 241,264

247,253

Committed amount

$ 260,000

260,000

Possible increase in mortgage based on meeting certain performance hurdles

$ 40,000

Joint venture | 1552 Broadway

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1],[11]

3.47%

Total floating rate debt

^[11]

$ 143,430

113,869

Amount of original debt being refinanced into another loan

$ 119,600

Joint venture | 1552 Broadway | Mortgage loan

First mortgage notes and other loan payable

Refinanced mortgage loan

170,000

Unfunded amount

44,200

Joint venture | 1552 Broadway | Mezzanine loans

First mortgage notes and other loan payable

Refinanced mortgage loan

30,000

Unfunded amount

$ 12,400

Joint venture | 1552 Broadway | Construction financing facility

First mortgage notes and other loan payable

Refinanced mortgage loan

$ 200,000

Term of refinanced mortgage

3 years

Number of extension options (extension options) | extenstion_option

Extension option term

1 year

Joint venture | Other loan payable

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1]

1.09%

Total floating rate debt

$ 30,000

30,000

Joint venture | 724 Fifth Avenue

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1]

2.54%

Total floating rate debt

$ 120,000

120,000

Joint venture | 10 East 53rd Street

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1]

2.69%

Total floating rate debt

$ 125,000

125,000

Joint venture | 33 Beekman

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1],[12]

2.94%

Total floating rate debt

^[12]

$ 18,362

18,362

Committed amount

$ 75,000

Joint venture | 600 Lexington Avenue

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1]

2.27%

Total floating rate debt

$ 121,570

124,384

Joint venture | 27-29 West 34th Street

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1],[13]

2.09%

Total floating rate debt

^[13]

$ 53,038

53,375

Joint venture | 521 Fifth Avenue

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1]

2.39%

Total floating rate debt

$ 170,000

170,000

Joint venture | 16 Court Street

First mortgage notes and other loan payable

Total floating rate debt

^[14]

$ 0

$ 84,916

West Coast office portfolio

First mortgage notes and other loan payable

Ownership interest sold (as a percent)

20.78%

West Coast office portfolio | Mortgage loan

First mortgage notes and other loan payable

Repaid loan

194,500

West Coast office portfolio | Mezzanine loans

First mortgage notes and other loan payable

Repaid loan

$ 20,500

521 Fifth Avenue

First mortgage notes and other loan payable

Ownership interest sold (as a percent)

49.50%

[1]	Effective weighted average interest rate for the three months ended September 30, 2013, taking into account interest rate hedges in effect during the period.
[2]	Effective weighted average interest rate for the three months ended September 30, 2013, taking into account interest rate hedges in effect during the period.
[3]	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest. In October 2013, the maturity date of the loan was extended to December 2013.
[4]	These loans comprised of a $576.0 million mortgage and a $562.4 million mezzanine loan, both of which are fixed rate loans, except for $72.0 million of the mortgage and $70.3 million of the mezzanine loan which are floating. Up to $200.0 million of the mezzanine loan, secured indirectly by these properties, is recourse to us. We believe it is unlikely that we will be required to perform under this guarantee.
[5]	In April 2013, this loan was refinanced at par and its maturity was extended to April 2023.
[6]	This loan went into default in November 2009 due to the non-payment of debt service.
[7]	This loan has a committed amount of $90.0 million.
[8]	As a result of the sale of two of its properties, the joint venture paid down $194.5 million of its mortgage and $20.5 million of its mezzanine loan.
[9]	As of September 30, 2013, $1.8 million of the existing loan remained unfunded.
[10]	This loan has a committed amount of $260.0 million. The joint venture has the ability to increase the mortgage by $40.0 million based on meeting certain performance hurdles. In connection with this obligation, we executed a master lease agreement and our joint venture partner executed a contribution agreement to reflect its pro rata obligation under the master lease. The lien on the mortgage and the master lease excludes the condominium interest owned by Y&R. See Note 5 of prior table.
[11]	In April 2013, we refinanced the previous $119.6 million mortgage with a $200.0 million three-year loan construction financing facility comprised of a $170.0 million mortgage loan and a $30.0 million mezzanine loan. The facility has two one-year extension options. As of September 30, 2013, $44.2 million of the mortgage loan and $12.4 million of the mezzanine loan remained unfunded.
[12]	This loan has a committed amount of $75.0 million, which is recourse to us. Our partner has indemnified us for its pro rata share of the recourse guarantee. A portion of the guarantee terminates upon the joint venture reaching certain milestones. We believe it is unlikely that we will be required to perform under this guarantee.
[13]	In May 2013, this loan was refinanced and its maturity was extended to May 2018.
[14]	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest.

Investments in Unconsolidated Joint Ventures (Details 3) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Assets
Commercial real estate property, net		$ 10,139,703		$ 10,139,703		$ 10,269,630
Other assets		729,426		729,426		718,326
Liabilities and members' equity
Mortgages and other loans payable		4,641,758		4,641,758		4,615,464
Company's net investment in unconsolidated joint ventures		1,109,815		1,109,815		1,032,243
Combined statements of income for the unconsolidated joint ventures
Operating expense		77,272	$ 82,351	218,901	$ 221,670
Ground rent		10,127	8,874	29,767	26,570
Real estate taxes		55,511	53,293	161,625	156,746
Interest expense, net of interest income		82,973	85,659	247,420	247,789
Amortization of deferred financing costs		4,331	4,493	13,034	11,626
Depreciation and amortization				264,833	249,950
Transaction related costs, net of recoveries		(2,349)	1,372	719	4,398
Total expenses		336,207	338,420	983,503	964,398
Loss on early extinguishment of debt		0	0	(18,523)	0
Company's equity in net income (loss) of unconsolidated joint ventures		2,939	11,658	4,251	80,988
717 Fifth Avenue
Combined statements of income for the unconsolidated joint ventures
Additional cash income recognized due to distribution of refinancing proceeds	$ 67,900
Joint venture
Assets
Commercial real estate property, net		6,566,636		6,566,636		6,910,991
Other assets		937,469		937,469		728,113
Total assets		7,504,105		7,504,105		7,639,104
Liabilities and members' equity
Mortgages and other loans payable		5,098,203		5,098,203		5,358,048
Other liabilities		378,752		378,752		406,929
Members' equity		2,027,150		2,027,150		1,874,127
Total liabilities and members equity		7,504,105		7,504,105		7,639,104
Company's net investment in unconsolidated joint ventures		1,109,815		1,109,815		1,032,243
Combined statements of income for the unconsolidated joint ventures
Total revenues		156,571	120,121	462,776	364,587
Operating expense		29,211	17,984	86,027	50,957
Ground rent		657	657	1,972	2,317
Real estate taxes		19,105	12,008	53,368	37,865
Interest expense, net of interest income		56,169	55,058	169,137	160,528
Amortization of deferred financing costs		2,869	2,338	12,454	7,009
Depreciation and amortization		49,402	35,242	144,552	107,749
Transaction related costs, net of recoveries		0	934	0	1,292
Total expenses		157,413	124,221	467,510	367,717
Loss on early extinguishment of debt		0	21,421	0	21,421
Net (loss) income		(842)	17,321	(4,734)	18,291
Company's equity in net income (loss) of unconsolidated joint ventures		2,939	$ 11,658	4,251	$ 80,988
Joint venture
Liabilities and members' equity
Mortgages and other loans payable		$ 5,098,203		$ 5,098,203		$ 5,358,048

Deferred Costs (Details) - USD ($) $ in Thousands	Sep. 30, 2013	Dec. 31, 2012
Deferred Costs [Abstract]
Deferred financing	$ 149,888	$ 152,596
Deferred leasing	304,135	285,931
Deferred costs, gross	454,023	438,527
Less accumulated amortization	(206,173)	(177,382)
Deferred costs, net	$ 247,850	$ 261,145

- Definition

For an unclassified balance sheet, this element represents costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction. This amount is before considering accumulated amortization representing the periodic charge to earnings to recognize the deferred costs over the term of the related lease.

+ References + Details

Mortgages and Other Loans Payable (Details) - USD ($)
$ / shares in Units, $ in Thousands

1 Months Ended

3 Months Ended

9 Months Ended

Feb. 28, 2013

Nov. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

First mortgage notes and other loan payable

Total fixed rate debt

$ 4,138,580

$ 3,457,769

Total floating rate debt

503,178

1,157,695

Total mortgages and other loans payable

4,641,758

4,615,464

Gross book value of the properties and debt and preferred equity investments collateralizing the mortgages and other loans payable

8,000,000

7,600,000

Loss on early extinguishment of debt

$ 0

$ 18,523

$ 0

SL Green Operating Partnership [Member] | Series E preferred units

First mortgage notes and other loan payable

Preferred Units, shares issued (in shares)

22,658

Preferred Units (as a percent)

5.00%

Preferred Units, liquidation preference (in dollars per share)

$ 1.00

Master repurchase

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1],[2]

3.19%

Total floating rate debt

^[2]

$ 131,966

116,667

Interest rate, description

1-month LIBOR

Interest rate added to base rate (as a percent)

3.00%

Maximum borrowing capacity

$ 175,000

Extension option available

10 months

Master repurchase | Refinancing

First mortgage notes and other loan payable

Interest rate added to base rate (as a percent)

3.50%

609 Partners, LLC

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1],[3]

5.00%

Total fixed rate debt

^[3]

$ 23

609 Partners, LLC | SL Green Operating Partnership [Member] | Series E preferred units

First mortgage notes and other loan payable

Preferred Units, shares issued (in shares)

63,900,000

Preferred Units (as a percent)

5.00%

Preferred Units, liquidation preference (in dollars per share)

$ 1.00

Preferred units, shares redeemed (shares)

63,800,000

125 Park Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

5.75%

Total fixed rate debt

$ 146,250

146,250

711 Third Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

4.99%

Total fixed rate debt

$ 120,000

120,000

625 Madison Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

7.27%

Total fixed rate debt

$ 122,178

125,603

500 West Putnam

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

5.52%

Total fixed rate debt

$ 23,665

24,060

420 Lexington Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

7.15%

Total fixed rate debt

$ 183,443

184,992

Landmark Square

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

4.00%

Total fixed rate debt

$ 83,309

84,486

485 Lexington Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

5.61%

Total fixed rate debt

$ 450,000

450,000

120 West 45th Street

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

6.12%

Total fixed rate debt

$ 170,000

170,000

762 Madison Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

3.75%

Total fixed rate debt

$ 8,252

8,371

2 Herald Square

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

5.36%

Total fixed rate debt

$ 191,250

191,250

885 Third Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

6.26%

Total fixed rate debt

$ 267,650

267,650

Other loan payable due in September, 2019

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1],[4]

8.00%

Total fixed rate debt

^[4]

$ 50,000

50,000

One Madison Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

5.91%

Total fixed rate debt

$ 592,560

607,678

100 Church Street

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

4.68%

Total fixed rate debt

$ 230,000

230,000

919 Third Avenue

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1],[5]

5.12%

Total fixed rate debt

^[5]

$ 500,000

500,000

Interest in property (as a percent)

51.00%

400 East 57th Street

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

4.13%

Total fixed rate debt

$ 70,000

70,000

400 East 58th Street

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

4.13%

Total fixed rate debt

$ 30,000

30,000

1515 Broadway

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1],[6]

3.93%

Total fixed rate debt

$ 900,000

^[6]

$ 900,000

^[6]

Total floating rate debt

^[6]

$ 0

769,813

Repaid loan

775,000

Loss on early extinguishment of debt

18,500

Prepayment penalty

$ 7,600

1515 Broadway | Refinancing

First mortgage notes and other loan payable

Term

12 years

300 Main Street

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1],[7]

0.00%

Total fixed rate debt

^[7]

$ 0

11,500

East 220 Street 42 [Member]

First mortgage notes and other loan payable

Interest rate, fixed rate debt (as a percent)

^[1]

0.00%

Total fixed rate debt

$ 0

185,906

16 Court Street

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1],[8]

2.69%

Total floating rate debt

^[8]

$ 84,354

180 Maiden Lane

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1],[9]

2.38%

Total floating rate debt

^[9]

$ 264,858

271,215

248-252 Bedford Avenue

First mortgage notes and other loan payable

Interest rate, floating rate debt (as a percent)

^[1]

2.44%

Total floating rate debt

$ 22,000

$ 0

[1]	Effective weighted average interest rate for the three months ended September 30, 2013, taking into account interest rate hedges in effect during the period.
[2]	The Master Repurchase Agreement, or MRA, has a maximum facility capacity of $175.0 million, under which we agreed to sell certain debt investments in exchange for cash with a simultaneous agreement to repurchase the same debt investments at a certain date or on demand. In September 2013, the maturity of this MRA was extended to November 2013 subject to a 10 months extension option. This MRA bears interest based on 1-month LIBOR plus 300 basis points through September 2013 and a floating rate of interest of 350 basis points over 1-month LIBOR through the extended maturity date.
[3]	As part of an acquisition, the Operating Partnership issued 63.9 million units of its 5.0% Series E preferred units, or the Series E units, with a liquidation preference of $1.00 per unit. As of September 30, 2013, 63.8 million Series E units had been redeemed.
[4]	This loan is secured by a portion of a preferred equity investment.
[5]	We own a 51.0% controlling interest in the joint venture that is the borrower on this loan. This loan is non-recourse to us.
[6]	In February 2013, we refinanced the previous $775.0 million mortgage with a new $900.0 million 12-year mortgage and realized a net loss on early extinguishment of debt of approximately $18.5 million, including a prepayment penalty of $7.6 million.
[7]	The property was sold in September 2013.
[8]	In April 2013, we acquired interests from our joint venture partner, CIF, and have consolidated the entity due to our controlling interest. In October 2013, the maturity date of the loan was extended to December 2013.
[9]	In connection with this consolidated joint venture obligation, we executed a master lease agreement. Our partner has executed a contribution agreement to reflect its 50.1% share of the obligation under the master lease.

Corporate Indebtedness (Details)
$ / shares in Units, $ in Thousands

1 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

Jan. 02, 2013

USD ($)

Dec. 27, 2012

USD ($)

Nov. 30, 2012

USD ($)

extenstion_option

Mar. 31, 2012

USD ($)

Oct. 31, 2010

USD ($)

$ / shares

Mar. 31, 2007

USD ($)

$ / shares

Jun. 30, 2005

USD ($)

Sep. 30, 2013

USD ($)

Sep. 30, 2012

USD ($)

Sep. 30, 2013

USD ($)

$ / shares

Sep. 30, 2012

USD ($)

Dec. 31, 2012

USD ($)

Corporate Indebtedness

Outstanding under line of credit facility

$ 340,000

$ 70,000

Debt disclosures by scheduled maturity date

Accreted Balance

1,737,869

1,734,956

Loss on early extinguishment of debt

$ 0

$ 18,523

$ 0

2012 Credit Facility

Corporate Indebtedness

Revolving credit facility, maximum borrowing capacity

$ 1,600,000

Interest rate, description

LIBOR

Letters of credit

79,100

$ 79,100

Ability to borrow under line of credit facility

900,000

Term loan

Corporate Indebtedness

Revolving credit facility, maximum borrowing capacity

400,000

Outstanding under line of credit facility

$ 400,000

Interest rate added to base rate (as a percent)

1.65%

Debt disclosures by scheduled maturity date

Effective Rate (as a percent)

2.00%

Term loan | Minimum

Corporate Indebtedness

Interest rate added to base rate (as a percent)

1.15%

Term loan | Maximum

Corporate Indebtedness

Interest rate added to base rate (as a percent)

2.00%

Revolving credit facility

Corporate Indebtedness

Revolving credit facility, maximum borrowing capacity

$ 1,200,000

Number of extension options (extension options) | extenstion_option

Extension option available

6 months

Maximum borrowing capacity, optional expansion

$ 1,500,000

Outstanding under line of credit facility

$ 340,000

Interest rate added to base rate (as a percent)

1.45%

Facility fee on total commitments, payable quarterly in arrears (as a percent)

0.30%

Extension fee required to be paid (as a percent)

0.10%

Debt disclosures by scheduled maturity date

Effective Rate (as a percent)

1.64%

Revolving credit facility | Minimum

Corporate Indebtedness

Interest rate added to base rate (as a percent)

1.00%

Facility fee on total commitments, payable quarterly in arrears (as a percent)

0.15%

Revolving credit facility | Maximum

Corporate Indebtedness

Interest rate added to base rate (as a percent)

1.75%

Facility fee on total commitments, payable quarterly in arrears (as a percent)

0.35%

Senior Unsecured Notes

Debt disclosures by scheduled maturity date

Unpaid Principal Balance

$ 1,388,166

Accreted Balance

1,337,869

1,334,956

Aggregate principal amount of notes repurchased

$ 42,400

Loss on early extinguishment of debt

3,800

Repayment of debt

$ 46,400

5.88% Senior unsecured notes maturing on August 15, 2014

Debt disclosures by scheduled maturity date

Unpaid Principal Balance

^[1],[2]

75,898

Accreted Balance

^[1],[2]

$ 75,898

75,898

Coupon Rate (as a percent)

^[1],[2],[3]

5.88%

Effective Rate (as a percent)

^[1],[2]

5.88%

Term (in years)

^[1],[2]

10 years

6.00% Senior unsecured notes maturing on March 31, 2016

Debt disclosures by scheduled maturity date

Unpaid Principal Balance

^[1],[2]

$ 255,308

Accreted Balance

^[1],[2]

$ 255,194

255,165

Coupon Rate (as a percent)

6.00%

^[1],[2],[3]

6.00%

^[1],[2],[3]

Effective Rate (as a percent)

^[1],[2]

6.00%

Term (in years)

^[1],[2]

10 years

Aggregate principal amount of notes repurchased

$ 19,700

3.0% exchangeable senior notes due 2017

Debt disclosures by scheduled maturity date

Unpaid Principal Balance

^[4]

$ 345,000

Accreted Balance

^[4]

$ 295,151

287,373

Coupon Rate (as a percent)

^[3],[4]

3.00%

Effective Rate (as a percent)

^[4]

3.00%

Term (in years)

^[4]

7 years

Debt instrument issued, value

$ 345,000

Premium on sale price to calculate exchange price of notes (as a percent)

30.00%

Exchange price (in dollars per share) | $ / shares

$ 85.81

Adjusted exchange rate for the debentures (in shares) | shares

11.7153

Amount of convertible debt recorded in equity

$ 78,300

$ 49,800

5.00% senior unsecured notes maturing on August 15, 2018

Debt disclosures by scheduled maturity date

Unpaid Principal Balance

^[5]

250,000

Accreted Balance

^[5]

$ 249,666

249,620

Coupon Rate (as a percent)

^[3],[5]

5.00%

Effective Rate (as a percent)

^[5]

5.00%

Term (in years)

^[5]

7 years

7.75% Senior unsecured notes maturing on March 15, 2020

Debt disclosures by scheduled maturity date

Unpaid Principal Balance

^[5]

$ 250,000

Accreted Balance

^[5]

$ 250,000

250,000

Coupon Rate (as a percent)

^[3],[5]

7.75%

Effective Rate (as a percent)

^[5]

7.75%

Term (in years)

^[5]

10 years

4.50% senior unsecured notes maturing on December 1, 2022

Debt disclosures by scheduled maturity date

Unpaid Principal Balance

^[5]

$ 200,000

Accreted Balance

^[5]

$ 200,000

200,000

Coupon Rate (as a percent)

^[3],[5]

4.50%

Effective Rate (as a percent)

^[5]

4.50%

Term (in years)

^[5]

10 years

4.0% exchangeable senior debentures due 2025

Debt disclosures by scheduled maturity date

Unpaid Principal Balance

^[6]

$ 7

Accreted Balance

^[6]

$ 7

Coupon Rate (as a percent)

^[3],[6]

4.00%

Effective Rate (as a percent)

^[6]

4.00%

Term (in years)

^[6]

20 years

Repayment of debt

650

Adjusted exchange rate for the debentures (in shares) | shares

7.7461

Adjusted reference dividend for debentures | $ / shares

$ 1.3491

3.00% Senior unsecured notes maturing on March 30, 2027

Debt disclosures by scheduled maturity date

Unpaid Principal Balance

^[7]

$ 11,953

Accreted Balance

^[7]

$ 11,953

$ 16,893

Coupon Rate (as a percent)

^[3],[7]

3.00%

Effective Rate (as a percent)

^[7]

3.00%

Term (in years)

^[7]

20 years

Aggregate principal amount of notes repurchased

$ 4,900

Debt instrument issued, value

$ 750,000

Repayment of debt

$ 102,200

Premium on sale price to calculate exchange price of notes (as a percent)

25.00%

Exchange price (in dollars per share) | $ / shares

$ 173.30

Amount of convertible debt recorded in equity

$ 66,600

Consideration as a percentage of accrued balance on repayment of debt

99.60%

5.875% Senior unsecured notes

Debt disclosures by scheduled maturity date

Coupon Rate (as a percent)

5.875%

Aggregate principal amount of notes repurchased

$ 22,700

Term Loans and Trust Preferred Securities

Debt disclosures by scheduled maturity date

Coupon Rate (as a percent)

5.61%

Debt instrument issued, value

$ 100,000

Maximum consecutive quarters up to which interest payment can be deferred

2 years

Number of years for which securities will bear fixed rate of interest

10 years

[1]	Issued by ROP.
[2]	On December 27, 2012, we repurchased $42.4 million of aggregate principal amount of these notes, consisting of $22.7 million of the 5.875% Notes and $19.7 million of the 6.0% Notes, for a total consideration of $46.4 million and realized a net loss on early extinguishment of debt of approximately $3.8 million.
[3]	Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.
[4]	In October 2010, the Operating Partnership issued $345.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on April 15 and October 15. The notes had an initial exchange rate representing an exchange price that was set at a 30.0% premium to the last reported sale price of the Company's common stock on October 6, 2010, or $85.81. The initial exchange rate is subject to adjustment under certain circumstances. The current exchange rate is 11.7153 shares of our common stock per $1,000 principal amount of these notes. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of our common stock, if any, at our option. The notes are guaranteed by ROP. On the issuance date, $78.3 million of the debt balance was recorded in equity. As of September 30, 2013, approximately $49.8 million remained to be amortized into the debt balance.
[5]	Issued by the Company, the Operating Partnership and ROP, as co-obligors.
[6]	Exchangeable senior debentures which are currently callable at par. In addition, the debentures can be put to ROP, at the option of the holder at par plus accrued and unpaid interest, on June 15, 2015 and 2020 and upon the occurrence of certain change of control transactions. As a result of the acquisition of all outstanding shares of common stock of Reckson, or the Reckson Merger, the adjusted exchange rate for the debentures is 7.7461 shares of our common stock per $1,000 of principal amount of debentures and the adjusted reference dividend for the debentures is $1.3491. During the year ended December 31, 2012, we repurchased $650,000 of these bonds at par.
[7]	In March 2007, the Operating Partnership issued $750.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on March 30 and September 30. The notes have an initial exchange rate representing an exchange price that was set at a 25.0% premium to the last reported sale price of the Company's common stock on March 20, 2007, or $173.30. The initial exchange rate is subject to adjustment under certain circumstances. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of the Company's common stock, if any, at our option. The notes are currently redeemable at the Operating Partnership’s option. The Operating Partnership may be required to repurchase the notes on March 30, 2017 and 2022, and upon the occurrence of certain designated events. On March 30, 2012, we repurchased $102.2 million of aggregate principal amount of the exchangeable notes pursuant to a mandatory offer to repurchase the notes. On the issuance date, $66.6 million was recorded in equity and was fully amortized into the debt balance as of March 31, 2012. On January 2, 2013, we repurchased $4.9 million of aggregate principal amount of exchangeable notes at 99.6% of the principal amount.

Corporate Indebtedness-Future Payment (Details) $ in Thousands	Sep. 30, 2013 USD ($)
Amortization and Maturities of Long-term Debt [Abstract]
2013	$ 226,413
2014	265,979
2015	276,572
2016	826,484
2017	1,504,745
Thereafter	3,769,732
Total amortization of debt and principal repayments	6,869,925
Mortgages and other loans payable
Scheduled Amortization
2013	10,093
2014	43,808
2015	47,028
2016	55,689
2017	61,213
Thereafter	311,611
Total amortization of debt	529,442
Maturities of Long-term Debt [Abstract]
2013	216,320
2014	146,273
2015	229,537
2016	515,487
2017	1,086,579
Thereafter	1,918,121
Total principal repayments	4,112,317
Revolving credit facility
Maturities of Long-term Debt [Abstract]
Thereafter	340,000
Total principal repayments	340,000
Term Loans and Trust Preferred Securities
Maturities of Long-term Debt [Abstract]
Thereafter	100,000
Total principal repayments	100,000
Term Loan and Senior Unsecured Notes
Amortization and Maturities of Long-term Debt [Abstract]
2014	75,898
2015	7
2016	255,308
2017	356,953
Thereafter	1,100,000
Total amortization of debt and principal repayments	1,788,166
Joint venture
Maturities of Long-term Debt [Abstract]
2013	77,387
2014	324,001
2015	41,085
2016	597,456
2017	930,713
Thereafter	198,805
Total principal repayments	$ 2,169,447

Corporate Indebtedness-Interest (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Debt Disclosure [Abstract]
Interest expense	$ 83,536	$ 86,045	$ 248,905	$ 248,986
Interest income	(563)	(386)	(1,485)	(1,197)
Interest expense, net	82,973	85,659	247,420	247,789
Interest capitalized	$ 2,828	$ 3,360	$ 9,191	$ 8,892

Related Party Transactions (Details)	3 Months Ended		9 Months Ended
Related Party Transactions (Details)	Sep. 30, 2013 USD ($) ft²	Sep. 30, 2012 USD ($)	Sep. 30, 2013 USD ($) ft²	Sep. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)
Related Party Transactions
Due from joint ventures	$ 2,128,000		$ 2,128,000		$ 511,000
Other	5,672,000		5,672,000		7,020,000
Related party receivables	7,800,000		7,800,000		7,531,000
Due to joint venture (included in Accounts payable and accrued expenses)	0		0		$ (8,401,000)
Alliance Building Services
Related Party Transactions
Profit participation from related party	800,000	$ 800,000	2,700,000	$ 2,400,000
Payments made for services	4,800,000	4,700,000	13,200,000	12,900,000
A-List Marketing, LLC
Related Party Transactions
Payments made for services	$ 50,700	2,400	$ 158,000	58,300
Nancy Peck and Company
Related Party Transactions
Space at 420 Lexington Avenue leased (in square feet) \| ft²	1,003		1,003
Lease rent due per year	$ 35,516		$ 35,516
Increased lease rent due per year beginning in year seven	40,000		40,000
Entity with Stephen L Green ownership interest
Related Party Transactions
Property management fees from related party	$ 105,000	$ 93,000	$ 319,000	$ 292,000

Noncontrolling Interests in Operating Partnership (Details)	1 Months Ended
	Jan. 31, 2012 $ / shares shares	Nov. 30, 2011 $ / shares shares	Sep. 30, 2013 unit	Sep. 30, 2013	Sep. 30, 2013 shares	Sep. 30, 2013 $ / shares	Dec. 31, 2012 unit $ / shares shares
Series G Preferred Units
Organization
Number of preferred units issued (in shares) \| shares					1,902,000		1,902,000
Liquidation preference of preferred units (in dollars per share)						$ 25.00	$ 25.00
Series H Preferred Units
Organization
Number of preferred units issued (in shares) \| shares					80,000		80,000
Liquidation preference of preferred units (in dollars per share)						$ 25.00	$ 25.00
SL Green Operating Partnership [Member]
Organization
Noncontrolling interest in the operating partnership (as a percent)				2.94%			2.94%
Number of units of operating partnership owned by the noncontrolling interest unit holders (units)			2,792,050		2,792,050		2,759,758
Shares of common stock reserved for issuance upon redemption of units of limited partnership interest in operating partnership (shares) \| shares					2,792,050
SL Green Operating Partnership [Member] \| Series G Preferred Units
Organization
Number of preferred units issued (in shares) \| shares	1,902,000
Dividend rate preferred units (as a percent)	4.50%
Liquidation preference of preferred units (in dollars per share)	$ 25.00
Annual dividends on preferred units (in dollars per share)	1.125
Operating partnership common stock value use for conversion of preferred units (in dollars per share)	$ 88.50
Number of company common stock issue on redemption of operation partnership common units	1
SL Green Operating Partnership [Member] \| Series H Preferred Units
Organization
Number of preferred units issued (in shares) \| shares		80,000
Dividend rate preferred units (as a percent)		6.00%
Liquidation preference of preferred units (in dollars per share)		$ 25.00
Annual dividends on preferred units (in dollars per share)		$ 1.50
SL Green Operating Partnership [Member] \| Series E preferred units
Organization
Number of preferred units issued (in shares) \| shares		22,658
Dividend rate preferred units (as a percent)		5.00%
Liquidation preference of preferred units (in dollars per share)		$ 1.00
SL Green Operating Partnership [Member] \| Series F Preferred Stock [Member]
Organization
Number of preferred units issued (in shares) \| shares		60
Liquidation preference of preferred units (in dollars per share)		$ 1,000.00

Noncontrolling Interest-Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Distributions to noncontrolling interests			$ (11,809)
Net income	$ 1,110	$ 567	1,909	$ 4,876
Accumulated other comprehensive income (loss)	(25)	$ (59)	490	$ (396)
Balance at the end of period	248,046		248,046		$ 212,907
SL Green Operating Partnership [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Distributions to noncontrolling interests			(2,695)		(3,296)
Issuance of common units			14,270		42,239
Redemption of common units			(17,287)		(87,513)
Net income			1,909		5,597
Accumulated other comprehensive income (loss)			490		(388)
Fair value adjustment			38,452		61,238
Balance at the end of period	$ 248,046		$ 248,046		$ 212,907

- Definition

Net of tax amount of other comprehensive income (loss) attributable to noncontrolling interests.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (c)(3)
-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569643-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(3)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 30
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Stockholders' Equity of the Company (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended				3 Months Ended		9 Months Ended
	Jun. 30, 2013	Sep. 30, 2012	Aug. 31, 2012	Jul. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Mar. 31, 2012	Jul. 31, 2011
Stockholders' Equity
Common stock, shares authorized (in shares)					160,000,000		160,000,000		160,000,000
Common stock, par value (in dollars per share)					$ 0.01		$ 0.01		$ 0.01
Common stock, shares issued (in shares)					95,780,000		95,780,000		94,896,000
Proceeds from Issuance of Common Stock							$ 41,758	$ 423,544
Preferred stock redemption costs					$ 0	$ 10,010	$ 12,160	$ 10,010
Common Stock
Stockholders' Equity
Common stock, shares outstanding net of treasury shares (shares)					92,214,000		92,214,000		91,250,000
Issuance of common stock (in shares)							462,000
Series I Preferred Units
Stockholders' Equity
Preferred stock, par value (in dollars per share)					$ 0.01		$ 0.01		$ 0.01
Preferred stock, shares outstanding (in shares)					9,200,000		9,200,000		9,200,000
Series C Preferred Units
Stockholders' Equity
Preferred stock, par value (in dollars per share)					$ 0.01		$ 0.01		$ 0.01
Preferred stock, shares outstanding (in shares)									7,700,000
SL Green Realty Corporation
Stockholders' Equity
Authorized capital stock (in shares)					260,000,000		260,000,000
Authorized shares, par value (in dollars per share)					$ 0.01		$ 0.01
Common stock, shares authorized (in shares)					160,000,000		160,000,000
Common stock, par value (in dollars per share)					$ 0.01		$ 0.01
Excess stock authorized (shares)					75,000,000		75,000,000
Excess stock, par value (in dollars per share)					$ 0.01		$ 0.01
Preferred stock, shares authorized (shares)					25,000,000		25,000,000
Preferred stock, par value (in dollars per share)					$ 0.01		$ 0.01
SL Green Realty Corporation \| Common Stock
Stockholders' Equity
Common stock, shares outstanding net of treasury shares (shares)					92,214,396		92,214,396
SL Green Realty Corporation \| At-the-market equity offering programs
Stockholders' Equity
Value of shares to be issued (shares)											$ 250,000
Issuance of common stock (in shares)							462,276
Proceeds from Shares Sold Gross							$ 42,500
Proceeds from Issuance of Common Stock							41,800
Aggregate value of shares available for issuance					$ 2,800		$ 2,800
SL Green Realty Corporation \| Common Stock
Stockholders' Equity
Excess Stock, Shares Issued					0		0
SL Green Realty Corporation \| Series I Preferred Units
Stockholders' Equity
Preferred stock, shares outstanding (in shares)					9,200,000		9,200,000
Preferred Units (as a percent)							6.50%
Preferred stock, liquidation preference (in dollars per share)					$ 25.00		$ 25.00
Perpetual Preferred stock, annual dividends per share (in dollars per share)							$ 1.625
Net proceeds from sale of preferred stock			$ 221,900
Preferred units, outstanding					9,200,000		9,200,000
Preferred Units, Dividend Rate, Percentage							6.50%
SL Green Realty Corporation \| Series C Preferred Units
Stockholders' Equity
Preferred stock, shares outstanding (in shares)			11,700,000
Preferred Units (as a percent)	7.625%
Preferred stock, liquidation preference (in dollars per share)	$ 25.00	$ 25.00				$ 25.00		$ 25.00
Perpetual Preferred stock, annual dividends per share (in dollars per share)							$ 1.90625
Preferred Units, Dividend Rate, Percentage	7.625%
Preferred stock redeemed (in shares)	7,700,000	4,000,000
Amount of accumulated and unpaid dividends (in dollars per share)	$ 0.3495	$ 0.3707
Preferred stock redemption costs	$ 12,200	$ 6,300
SL Green Realty Corporation \| Series D Preferred Stock [Member]
Stockholders' Equity
Preferred Units (as a percent)				7.875%
Preferred stock, liquidation preference (in dollars per share)				$ 25.00
Perpetual Preferred stock, annual dividends per share (in dollars per share)							$ 1.96875
Preferred Units, Dividend Rate, Percentage				7.875%
Preferred stock redeemed (in shares)				4,000,000
Amount of accumulated and unpaid dividends (in dollars per share)				$ 0.4922
Preferred stock redemption costs				$ 3,700
SL Green Realty Corporation \| Dividend Reinvestment and Stock Purchase Plan [Member]
Stockholders' Equity
Common stock, shares authorized (in shares)										3,500,000
Issuance of common stock (in shares)							651	1,300,000
Proceeds from Issuance of Common Stock							$ 57	$ 99,500
SL Green Operating Partnership
Stockholders' Equity
Proceeds from Issuance of Common Stock							$ 41,758	$ 423,544
SL Green Operating Partnership \| Common Stock
Stockholders' Equity
Issuance of common stock (in shares)							462,276
SL Green Operating Partnership \| Series I Preferred Units
Stockholders' Equity
Preferred stock, shares outstanding (in shares)					9,200,000		9,200,000		9,200,000
SL Green Operating Partnership \| Series C Preferred Units
Stockholders' Equity
Preferred stock, shares outstanding (in shares)									7,700,000
Stock Options Stock Appreciation Rights and Other Awards [Member]
Stockholders' Equity
Option expiration period							5 years

Stockholders' Equity-EPS (Details) - USD ($)
$ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Basic Earnings:

Net income attributable to SL Green common stockholders

$ 37,025

$ 7,732

$ 64,210

$ 136,028

Basic Shares:

Basic weighted average common shares outstanding (in shares)

91,988,000

90,241,000

91,684,000

88,929,000

Effect of Dilutive Securities:

Diluted weighted average common shares and common share equivalents outstanding (in shares)

95,016,000

93,891,000

94,631,000

92,485,000

3.0% exchangeable senior notes due 2017

Effect of Dilutive Securities:

Interest rate (as a percent)

^[1],[2]

3.00%

3.0% exchangeable senior notes due 2027

Effect of Dilutive Securities:

Interest rate (as a percent)

^[2],[3]

3.00%

4.0% exchangeable senior debentures due 2025

Effect of Dilutive Securities:

Interest rate (as a percent)

^[2],[4]

4.00%

SL Green Realty Corporation

Basic Earnings:

Net income attributable to SL Green common stockholders

$ 37,025

$ 7,732

$ 64,210

$ 136,028

Effect of Dilutive Securities:

Redemption of units to common shares

1,110

567

1,909

4,876

Diluted Earnings:

Income attributable to SL Green common stockholders

$ 38,135

$ 8,299

$ 66,119

$ 140,904

Basic Shares:

Basic weighted average common shares outstanding (in shares)

91,988,000

90,241,000

91,684,000

88,929,000

Effect of Dilutive Securities:

Redemption of units to common shares

2,792,000

3,320,000

2,705,000

3,188,000

Stock-based compensation plans (in shares)

236,000

330,000

242,000

368,000

Diluted weighted average common shares and common share equivalents outstanding (in shares)

95,016,000

93,891,000

94,631,000

92,485,000

Common stock shares excluded from the diluted shares outstanding (shares)

703,702

548,000

922,239

613,000

SL Green Realty Corporation | 3.0% exchangeable senior notes due 2017

Effect of Dilutive Securities:

Interest rate (as a percent)

3.00%

SL Green Realty Corporation | 3.0% exchangeable senior notes due 2027

Effect of Dilutive Securities:

Interest rate (as a percent)

3.00%

SL Green Realty Corporation | 4.0% exchangeable senior debentures due 2025

Effect of Dilutive Securities:

Interest rate (as a percent)

4.00%

[1]	In October 2010, the Operating Partnership issued $345.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on April 15 and October 15. The notes had an initial exchange rate representing an exchange price that was set at a 30.0% premium to the last reported sale price of the Company's common stock on October 6, 2010, or $85.81. The initial exchange rate is subject to adjustment under certain circumstances. The current exchange rate is 11.7153 shares of our common stock per $1,000 principal amount of these notes. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of our common stock, if any, at our option. The notes are guaranteed by ROP. On the issuance date, $78.3 million of the debt balance was recorded in equity. As of September 30, 2013, approximately $49.8 million remained to be amortized into the debt balance.
[2]	Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.
[3]	In March 2007, the Operating Partnership issued $750.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on March 30 and September 30. The notes have an initial exchange rate representing an exchange price that was set at a 25.0% premium to the last reported sale price of the Company's common stock on March 20, 2007, or $173.30. The initial exchange rate is subject to adjustment under certain circumstances. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of the Company's common stock, if any, at our option. The notes are currently redeemable at the Operating Partnership’s option. The Operating Partnership may be required to repurchase the notes on March 30, 2017 and 2022, and upon the occurrence of certain designated events. On March 30, 2012, we repurchased $102.2 million of aggregate principal amount of the exchangeable notes pursuant to a mandatory offer to repurchase the notes. On the issuance date, $66.6 million was recorded in equity and was fully amortized into the debt balance as of March 31, 2012. On January 2, 2013, we repurchased $4.9 million of aggregate principal amount of exchangeable notes at 99.6% of the principal amount.
[4]	Exchangeable senior debentures which are currently callable at par. In addition, the debentures can be put to ROP, at the option of the holder at par plus accrued and unpaid interest, on June 15, 2015 and 2020 and upon the occurrence of certain change of control transactions. As a result of the acquisition of all outstanding shares of common stock of Reckson, or the Reckson Merger, the adjusted exchange rate for the debentures is 7.7461 shares of our common stock per $1,000 of principal amount of debentures and the adjusted reference dividend for the debentures is $1.3491. During the year ended December 31, 2012, we repurchased $650,000 of these bonds at par.

Partners' Capital of the Operating Partnership (Details)	Sep. 30, 2013 unit	Sep. 30, 2013	Sep. 30, 2013 shares	Dec. 31, 2012 unit shares
SL Green Operating Partnership [Member]
Stockholders' Equity
Noncontrolling interest in the operating partnership (as a percent)		2.94%		2.94%
Number of units of operating partnership owned by the noncontrolling interest unit holders (units)	2,792,050		2,792,050	2,759,758
Common Stock
Stockholders' Equity
Common stock, shares outstanding net of treasury shares (shares)			92,214,000	91,250,000
Common Stock \| SL Green Operating Partnership [Member]
Stockholders' Equity
Common stock, shares outstanding net of treasury shares (shares)			92,214,396
Series I Preferred Units \| SL Green Operating Partnership [Member]
Stockholders' Equity
Preferred units, outstanding			9,200,000

Partners' Capital of the Operating Partnership-EPS (Details) - USD ($)
shares in Thousands, $ in Thousands

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Stockholders' Equity

Income attributable to SLGOP common unitholders

$ 37,025

$ 7,732

$ 64,210

$ 136,028

SL Green Operating Partnership [Member]

Stockholders' Equity

Income attributable to SLGOP common unitholders

38,135

8,299

66,119

140,904

Income attributable to SLGOP common unitholders

$ 38,135

$ 8,299

$ 66,119

$ 140,904

Basic weighted average common units outstanding (in shares)

94,780

93,561

94,389

92,117

Stock-based compensation plans (in shares)

236

330

242

368

Diluted weighted average common units and common share equivalents outstanding (in shares)

95,016

93,891

94,631

92,485

Common stock units excluded from the diluted units outstanding (shares)

703,702

548,000

922,239

613,000

3.0% exchangeable senior notes due 2017

Stockholders' Equity

Interest rate (as a percent)

^[1],[2]

3.00%

3.0% exchangeable senior notes due 2017 | SL Green Operating Partnership [Member]

Stockholders' Equity

Interest rate (as a percent)

3.00%

3.00% Senior unsecured notes maturing on March 30, 2027

Stockholders' Equity

Interest rate (as a percent)

^[2],[3]

3.00%

3.00% Senior unsecured notes maturing on March 30, 2027 | SL Green Operating Partnership [Member]

Stockholders' Equity

Interest rate (as a percent)

3.00%

4.0% exchangeable senior debentures due 2025

Stockholders' Equity

Interest rate (as a percent)

^[2],[4]

4.00%

4.0% exchangeable senior debentures due 2025 | SL Green Operating Partnership [Member]

Stockholders' Equity

Interest rate (as a percent)

4.00%

[1]	In October 2010, the Operating Partnership issued $345.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on April 15 and October 15. The notes had an initial exchange rate representing an exchange price that was set at a 30.0% premium to the last reported sale price of the Company's common stock on October 6, 2010, or $85.81. The initial exchange rate is subject to adjustment under certain circumstances. The current exchange rate is 11.7153 shares of our common stock per $1,000 principal amount of these notes. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of our common stock, if any, at our option. The notes are guaranteed by ROP. On the issuance date, $78.3 million of the debt balance was recorded in equity. As of September 30, 2013, approximately $49.8 million remained to be amortized into the debt balance.
[2]	Interest on the senior unsecured notes is payable semi-annually with principal and unpaid interest due on the scheduled maturity dates.
[3]	In March 2007, the Operating Partnership issued $750.0 million of these exchangeable notes. Interest on these notes is payable semi-annually on March 30 and September 30. The notes have an initial exchange rate representing an exchange price that was set at a 25.0% premium to the last reported sale price of the Company's common stock on March 20, 2007, or $173.30. The initial exchange rate is subject to adjustment under certain circumstances. The notes are senior unsecured obligations of the Operating Partnership and are exchangeable upon the occurrence of specified events and during the period beginning on the twenty-second scheduled trading day prior to the maturity date and ending on the second business day prior to the maturity date, into cash or a combination of cash and shares of the Company's common stock, if any, at our option. The notes are currently redeemable at the Operating Partnership’s option. The Operating Partnership may be required to repurchase the notes on March 30, 2017 and 2022, and upon the occurrence of certain designated events. On March 30, 2012, we repurchased $102.2 million of aggregate principal amount of the exchangeable notes pursuant to a mandatory offer to repurchase the notes. On the issuance date, $66.6 million was recorded in equity and was fully amortized into the debt balance as of March 31, 2012. On January 2, 2013, we repurchased $4.9 million of aggregate principal amount of exchangeable notes at 99.6% of the principal amount.
[4]	Exchangeable senior debentures which are currently callable at par. In addition, the debentures can be put to ROP, at the option of the holder at par plus accrued and unpaid interest, on June 15, 2015 and 2020 and upon the occurrence of certain change of control transactions. As a result of the acquisition of all outstanding shares of common stock of Reckson, or the Reckson Merger, the adjusted exchange rate for the debentures is 7.7461 shares of our common stock per $1,000 of principal amount of debentures and the adjusted reference dividend for the debentures is $1.3491. During the year ended December 31, 2012, we repurchased $650,000 of these bonds at par.

Share-based Compensation-Amended and Restated Text (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013 USD ($) fungibleunits shares	Sep. 30, 2012 USD ($)	Sep. 30, 2013 USD ($) fungibleunits $ / shares shares	Sep. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option expiration period			10 years
Period of commencement of option vesting, from date of grant	1 year		1 year
Exercise price of options granted, low end of the range (usd per share) \| $ / shares			$ 20.67
Exercise price of options granted, high end of range (usd per share) \| $ / shares			$ 137.18
Remaining weighted average contractual life of the options outstanding			4 years 3 months 4 days
Remaining weighted average contractual life of the options exercisable			3 years 10 months 10 days
Compensation expense	$ 2,200,000	$ 1,000,000	$ 4,800,000	$ 3,900,000
Total unrecognized compensation cost related to unvested stock awards	8,900,000		$ 8,900,000
Weighted average period for recognition of compensation cost related to unvested stock awards			3 years
Employee Stock Option [Member] \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period			1 year
Employee Stock Option [Member] \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period			5 years
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense			$ 4,421,551		$ 6,930,381
Total unrecognized compensation cost related to unvested stock awards	$ 8,500,000		$ 8,500,000
Weighted average period for recognition of compensation cost related to unvested stock awards			2 years
Third Amended and Restated 2005 Stock Option and Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum fungible untis that may be granted (in shares) \| shares	17,130,000		17,130,000
Shares that may be issued if equal to fungible units (shares) \| shares	17,130,000		17,130,000
Fungible units available for issuance (in shares) \| shares	5,800,000		5,800,000
Full Value Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible units per share (fungible units by share) \| fungibleunits	2.76		2.76
Stock Options Stock Appreciation Rights and Other Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible units per share (fungible units by share) \| fungibleunits	0.77		0.77
Option expiration period			5 years
Other Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fungible units per share (fungible units by share) \| fungibleunits	1.0		1.0

Share-based Compensation-Fair Value Assumptions (Details) - Employee Stock Option [Member]	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield (percent)	1.95%	2.00%
Expected life of option	4 years 8 months 12 days	3 years 8 months 12 days
Risk-free interest rate (percent)	0.78%	0.46%
Expected stock price volatility	35.59%	37.40%

Share-based Compensation-Options roll forward (Details) - Employee Stock Option [Member] - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, beginning of the year (shares)	1,201,000	1,277,200
Options Outstanding, granted (shares)	246,000	361,331
Options Outstanding, Exercised (shares)	(184,919)	(382,612)
Options Outstanding, Lapsed or canceled (shares)	(33,202)	(54,919)
Options Outstanding, end of the year (shares)	1,228,879	1,201,000
Options Outstanding, options exercisable at the end of the period (shares)	506,903	479,913
Options Outstanding, weighted average fair value of options granted during the period	$ 4,999,225	$ 6,602,967
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, beginning of the year (usd per share)	$ 75.05	$ 63.37
Weighted Average Exercise Price, granted (usd per share)	79.58	75.36
Weighted Average Exercise Price, exercised (usd per share)	51.62	36.65
Weighted Average Exercise Price, lapsed or canceled (usd per share)	83.61	72.99
Weighted Average Exercise Price, end of the year (usd per share)	79.25	75.05
Weighted Average Exercise Price, options exercisable at the end of the period (usd per share)	$ 87.48	$ 86.85

Share-based Compensation (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
Share-based Compensation (Details) - USD ($)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost capitalized	$ 900,000	$ 900,000	$ 2,900,000	$ 2,900,000
Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Annual award vesting rate, low end of range (percent)			15.00%
Annual award vesting rate, high end of range (percent)			35.00%
Fair value of restricted stock vested during the period			$ 400,000		$ 22,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	2,811,501		2,811,501		2,804,901	2,912,456
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			9,867		92,729
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			(3,267)		(200,284)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			6,634		408,800
Compensation expense			$ 4,421,551		$ 6,930,381
Options Outstanding, weighted average fair value of options granted during the period			882,249		$ 7,023,942
Total unrecognized compensation cost related to unvested stock awards	$ 8,500,000		$ 8,500,000
Weighted average period for recognition of compensation cost related to unvested stock awards			2 years

Share-based Compensation-Notional Unit (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 17, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost capitalized	$ 0.9	$ 0.9	$ 2.9	$ 2.9
Notional Unit Long-term Compensation Plan 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of long term compensation program			3 years
Approximate amount of awards that may be earned by recipients after beginning of the second year if maximum performance achieved	25.0		$ 25.0
Approximate amount of awards that may be earned by recipients after beginning of the third year if maximum performance achieved	25.0		25.0
Minimum stock price appreciation to earn maximum amount of awards (as a percent)					50.00%
LTP units earned (in shares)					327,416		385,583	366,815
Percentage of LTIP units earned, vested on December 17, 2012						50.00%
Total compensation cost of plan subject to forfeitures			31.7
Compensation expense	0.9	$ 3.3	3.6	$ 7.0
Notional Unit Long-term Compensation Plan 2010 [Member] \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approximate amount of LTP units that may be earned by the recipients based on stock price appreciation	15.0		15.0
Notional Unit Long-term Compensation Plan 2010 [Member] \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approximate amount of LTP units that may be earned by the recipients based on stock price appreciation	$ 75.0		$ 75.0

Share-based Compensation-Other (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jan. 31, 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cost capitalized		$ 0.9	$ 0.9	$ 2.9	$ 2.9
Long Term Outperformance Compensation Program 2011 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approximate amount of LTP units that may be earned by the recipients based on stock price appreciation	$ 85.0
Term of long term compensation program	3 years
Value of LTIP Units that could be earned expressed as percentage of outperformance amounts in excess of the 30% benchmark	10.00%
Minimum return to be achieved for restricted stock awards to be made to plan participate (as a percent)	25.00%
Award annual vesting (percent)				33.33%
Maximum performance pool established, net of forfeitures	$ 85.0
Percentage of LTIP Units earned, vesting on August 31, 2014		50.00%		50.00%
Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Percentage of Awards Vesting on August 31, 2015		50.00%		50.00%
Total compensation cost of plan subject to forfeitures				$ 26.3
Compensation expense		$ 1.7	$ 1.4	$ 6.2	$ 4.0
Deferred Stock Compensation Plan for Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of the annual retainer fee, chairman fees and meeting fees that may be deferred by non-employee diretors		100.00%		100.00%
Awards granted (in shares)				6,692
Phantom stock units outstanding (in shares)		74,805		74,805
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock available for issuance						500,000
Duration of each offering period starting the first day of each calendar quarter		3 months		3 months
Purchase price as a percentage of market value of the common stock		85.00%		85.00%
Shares of common stock issued		72,026		72,026

Accumulated Other Comprehensive Loss of the Company (Details) - USD ($)
$ in Thousands

9 Months Ended

Sep. 30, 2013

Dec. 31, 2012

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

Beginning balance

$ (29,587)

Ending balance

(19,249)

SL Green Realty Corporation

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

Beginning balance

(29,587)

Other comprehensive (loss) income before reclassifications

5,444

Amounts reclassified from accumulated other comprehensive income (loss)

4,894

Ending balance

(19,249)

SL Green Realty Corporation | Unrealized Gains (Losses) on Marketable Securities [Member]

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

Beginning balance

^[1]

(16,834)

Other comprehensive (loss) income before reclassifications

^[1]

(121)

Amounts reclassified from accumulated other comprehensive income (loss)

^[1]

1,222

Ending balance

^[1]

(15,733)

SL Green Realty Corporation | Accumulated Net Unrealized Investment Gain (Loss) [Member]

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

Beginning balance

3,310

Other comprehensive (loss) income before reclassifications

317

Amounts reclassified from accumulated other comprehensive income (loss)

Ending balance

3,627

Deferred net losses from terminated hedges

(14,300)

$ (15,000)

SL Green Realty Corporation | Joint venture | Unrealized Gains (Losses) on Marketable Securities [Member]

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

Beginning balance

^[2]

(16,063)

Other comprehensive (loss) income before reclassifications

^[2]

5,248

Amounts reclassified from accumulated other comprehensive income (loss)

^[2]

3,672

Ending balance

^[2]

$ (7,143)

[1]

[2]

Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e637-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=20435746&loc=d3e681-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 31
-Article 5

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 15D
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14, 17, 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

+ Details

Accumulated Other Comprehensive Loss of the Operating Partnership (Details) - USD ($)
$ in Thousands

9 Months Ended

Sep. 30, 2013

Dec. 31, 2012

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

Beginning balance

$ (29,587)

Ending balance

(19,249)

SL Green Operating Partnership

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

Beginning balance

(30,649)

Other comprehensive (loss) income before reclassifications

5,789

Amounts reclassified from accumulated other comprehensive income (loss)

5,039

Ending balance

(19,821)

Accumulated Net Unrealized Investment Gain (Loss) [Member] | SL Green Operating Partnership

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

Beginning balance

3,429

Other comprehensive (loss) income before reclassifications

306

Amounts reclassified from accumulated other comprehensive income (loss)

Ending balance

3,735

Deferred net losses from terminated hedges

(14,800)

$ (15,500)

Unrealized Gains (Losses) on Marketable Securities [Member] | SL Green Operating Partnership

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

Beginning balance

^[1]

(17,438)

Other comprehensive (loss) income before reclassifications

^[1]

(20)

Amounts reclassified from accumulated other comprehensive income (loss)

^[1]

1,258

Ending balance

^[1]

(16,200)

Joint venture | Unrealized Gains (Losses) on Marketable Securities [Member] | SL Green Operating Partnership

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

Beginning balance

^[2]

(16,640)

Other comprehensive (loss) income before reclassifications

^[2]

5,503

Amounts reclassified from accumulated other comprehensive income (loss)

^[2]

3,781

Ending balance

^[2]

$ (7,356)

[1]	Amount reclassified from accumulated other comprehensive income (loss) is included in interest expense in the respective consolidated statements of income.
[2]	Amount reclassified from accumulated other comprehensive income (loss) is included in equity in net income from unconsolidated joint ventures in the respective consolidated statements of income.

- Definition

+ References

+ Details

Fair Value Measurements (Details) - USD ($)	Sep. 30, 2013	Dec. 31, 2012
Fair Value of Financial Instruments
Total marketable securities available-for-sale	$ 32,863,000	$ 21,429,000
Debt and preferred equity investments	1,315,551,000	1,348,434,000
Fair Value
Fair Value of Financial Instruments
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	1,465,000	1,959,000
Total marketable securities available-for-sale	32,863,000	21,429,000
Level 1
Fair Value of Financial Instruments
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	0
Total marketable securities available-for-sale	3,109,000	2,202,000
Level 2
Fair Value of Financial Instruments
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	1,465,000	1,959,000
Total marketable securities available-for-sale	26,346,000	15,575,000
Level 3
Fair Value of Financial Instruments
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	0	0
Total marketable securities available-for-sale	3,408,000	3,652,000
Carrying Value
Fair Value of Financial Instruments
Fixed and variable rate debt, Fair value Disclosure	6,819,627,000	6,520,420,000
Carrying Value \| Level 3
Fair Value of Financial Instruments
Debt and preferred equity investments	1,315,551,000	1,348,434,000
Fair Value
Fair Value of Financial Instruments
Fixed and variable rate debt, Fair value Disclosure	7,214,676,000	6,891,738,000
Minimum \| Fair Value \| Level 3
Fair Value of Financial Instruments
Debt and preferred equity investments	1,300,000,000.0	1,300,000,000
Maximum \| Fair Value \| Level 3
Fair Value of Financial Instruments
Debt and preferred equity investments	1,400,000,000	1,400,000,000
Fixed rate debt \| Carrying Value
Fair Value of Financial Instruments
Fixed and variable rate debt, Fair value Disclosure	5,606,449,000	4,922,725,000
Fixed rate debt \| Fair Value \| Level 3
Fair Value of Financial Instruments
Fixed and variable rate debt, Fair value Disclosure	5,979,568,000	5,334,244,000
Variable rate debt \| Carrying Value \| Level 3
Fair Value of Financial Instruments
Fixed and variable rate debt, Fair value Disclosure	1,213,178,000	1,597,695,000
Variable rate debt \| Fair Value
Fair Value of Financial Instruments
Fixed and variable rate debt, Fair value Disclosure	$ 1,235,108,000	$ 1,557,494,000

Financial Instruments: Derivatives and Hedging (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financial Instruments: Derivatives and Hedging
Estimated current balance held in accumulated other comprehensive loss to be reclassified into earnings within the next 12 months			$ 2,700
Share of joint venture of accumulated other comprehensive loss reclassified into equity in net income from unconsolidated joint ventures within the next 12 months			5,000
Amount of Gain or (Loss) Recognized in Other Comprehensive Loss (Effective Portion)	$ (2,766)	$ (3,352)	5,483	$ (10,305)
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	1,601	3,250	5,039	9,670
Amount of Gain (Loss) Recognized in Income (Effective Portion)	7	(1)	2	0
Interest Rate Cap expiring in November, 2013
Financial Instruments: Derivatives and Hedging
Notional Value	$ 271,912		$ 271,912
Strike Rate (as a percent)	6.00%		6.00%
Interest Rate Cap expiring in June, 2016
Financial Instruments: Derivatives and Hedging
Notional Value	$ 30,000		$ 30,000
Strike Rate (as a percent)	2.295%		2.295%
Interest Rate Swap expiring in February, 2015
Financial Instruments: Derivatives and Hedging
Notional Value	$ 8,500		$ 8,500
Strike Rate (as a percent)	0.74%		0.74%
Level 2
Financial Instruments: Derivatives and Hedging
Fair Value	$ (1,465)		$ (1,465)
Level 2 \| Interest Rate Cap expiring in November, 2013
Financial Instruments: Derivatives and Hedging
Fair Value	0		0
Level 2 \| Interest Rate Cap expiring in June, 2016
Financial Instruments: Derivatives and Hedging
Fair Value	(1,412)		(1,412)
Level 2 \| Interest Rate Swap expiring in February, 2015
Financial Instruments: Derivatives and Hedging
Fair Value	(53)		(53)
Interest Rate Swap [Member]
Financial Instruments: Derivatives and Hedging
Amount of Gain or (Loss) Recognized in Other Comprehensive Loss (Effective Portion)	(160)	(278)	(20)	(901)
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	320	468	1,258	1,394
Amount of Gain (Loss) Recognized in Income (Effective Portion)	2	(1)	2	0
Unconsolidated Joint Venture [Member] \| Derivative [Member]
Financial Instruments: Derivatives and Hedging
Amount of Gain or (Loss) Recognized in Other Comprehensive Loss (Effective Portion)	(2,606)	(3,074)	5,503	(9,404)
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	1,281	2,782	3,781	8,276
Amount of Gain (Loss) Recognized in Income (Effective Portion)	$ 5	$ 0	$ 0	$ 0

Commitments and Contingencies (Details) $ in Thousands	9 Months Ended
Commitments and Contingencies (Details) $ in Thousands	Sep. 30, 2013 USD ($)
Property Acquisitions
Initial term of non cancellable operating leases, minimum	1 year
Capital leases
2013 (3 months)	$ 573
2014	2,293
2015	2,364
2016	2,543
2017	2,653
Thereafter	356,544
Total minimum lease payments	366,970
Less amount representing interest	(319,478)
Present value of net minimum lease payments	47,492
Non-cancellable operating leases
2013 (3 months)	8,914
2014	35,655
2015	35,810
2016	36,251
2017	36,474
Thereafter	1,188,301
Total minimum lease payments	1,341,405
315 West 33rd Street [Member]
Property Acquisitions
Contractual obligation	$ 386,000

Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
Segment Information (Details) $ in Thousands	Sep. 30, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2013 USD ($) segment transaction	Sep. 30, 2012 USD ($)	Dec. 31, 2012 USD ($)
Segment information
Number of reportable segments (segments) \| segment			2
Total revenues:	$ 363,765	$ 357,011	$ 1,094,378	$ 1,036,130
Income (loss) from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate	30,497	32,486	96,538	154,957
Total assets	14,574,919		$ 14,574,919		$ 14,378,985
Leverage rate assumption (as a percent)			100.00%
Marketing, general and administrative expenses and transaction related costs	18,500	21,900	$ 64,200	65,900
Transactions between reportable segments (transactions) \| transaction			0
Real Estate Segment
Segment information
Total revenues:	319,317	329,142	$ 950,491	948,475
Income (loss) from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate	(5,885)	10,214	(21,705)	84,757
Total assets	13,247,401		13,247,401		13,021,095
Debt and Preferred Equity Segment
Segment information
Total revenues:	44,448	27,869	143,887	87,655
Income (loss) from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate	36,382	$ 22,272	118,243	$ 70,200
Total assets	$ 1,327,518		$ 1,327,518		$ 1,357,890

Segment Information (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Segment Information (Details 2) - USD ($) $ in Thousands	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reconciliation of income from continuing operations to net income attributable to SL Green common stockholders
Income from continuing operations before equity in net gain on sale of interest in unconsolidated joint venture/real estate	$ 30,497	$ 32,486	$ 96,538	$ 154,957
Purchase price fair value adjustment	0	0	(2,305)	0
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(354)	(4,807)	(3,937)	17,776
Income from continuing operations	30,143	27,679	90,296	172,733
Net income from discontinued operations	1,406	951	1,725	2,883
Gain on sale of discontinued operations	13,787	0	14,900	6,627
Net income	$ 45,336	$ 28,630	$ 106,921	$ 182,243

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4K
-URI http://asc.fasb.org/extlink&oid=18733213&loc=SL4591552-111686

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=18733213&loc=SL4591551-111686

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 5
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A1, A4, A5
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	9 Months Ended
	Nov. 07, 2013	Oct. 31, 2013	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Subsequent Events
Common stock, shares issued (in shares)			95,780,000		94,896,000
Common stock, par value (in dollars per share)			$ 0.01		$ 0.01
Net proceeds from sale of common stock/preferred stock			$ 41,758	$ 423,544
Subsequent event
Subsequent Events
Common stock, shares issued (in shares)	2,600,000
Common stock, par value (in dollars per share)	$ 0.01
Sales price of stock (usd per share)	$ 95.94
Net proceeds from sale of common stock/preferred stock	$ 249,400
Payments of stock issuance costs	$ 5,700
Shares authorized for sale to underwriter (shares)	390,000
Shares authorized for sale to underwriter (usd per share)	$ 95.94
Mortgages [Member] \| Mortgage for 220 East 42nd Street [Member] \| Subsequent event
Subsequent Events
Term		7 years
Face amount of mortgage		$ 275,000
Interest rate added to base rate (as a percent)		1.60%
Interest rate, description		30-day LIBOR

Label	Element	Value
Partnership Interest [Member]
Noncontrolling Interest in Operating Partnerships	us-gaap_MinorityInterestInOperatingPartnerships	$ 195,030,000