Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues
Rental revenue, net	$ 304,226	$ 279,608	$ 607,555	$ 535,584
Escalation and reimbursement	41,407	38,576	82,376	76,383
Investment income	45,191	39,714	87,260	93,798
Other income	18,250	22,734	28,182	37,312
Total revenues	409,074	380,632	805,373	743,077
Expenses
Operating expenses, including $4,472 and $8,189 in 2015 and $4,567 and $8,080 in 2014 of related party expenses	70,114	69,098	146,891	139,010
Real estate taxes	56,286	51,804	112,009	104,154
Ground rent	8,086	8,040	16,274	16,073
Interest expense, net of interest income	75,746	77,870	151,553	154,048
Amortization of deferred financing costs	5,952	5,401	12,567	9,058
Depreciation and amortization	199,565	93,379	307,902	179,894
Transaction related costs	3,067	1,697	4,210	4,171
Marketing, general and administrative	23,200	23,872	48,664	47,128
Total expenses	442,016	331,161	800,070	653,536
(Loss) income from continuing operations before equity in net income from unconsolidated joint ventures, equity in net gain on sale of interest in unconsolidated joint venture/real estate, purchase price fair value adjustment and loss on early extinguishment of debt	(32,942)	49,471	5,303	89,541
Equity in net income from unconsolidated joint ventures	2,994	8,619	7,024	14,748
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	769	1,444	769	106,084
Purchase price fair value adjustment	0	71,446	0	71,446
Loss on early extinguishment of debt	0	(1,028)	(49)	(1,025)
(Loss) income from continuing operations	(29,179)	129,952	13,047	280,794
Net income from discontinued operations	0	5,645	427	11,414
Gain on sale of discontinued operations	0	114,735	12,983	114,735
Net (loss) income	(29,179)	250,332	26,457	406,943
Net loss (income) attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	1,577	(8,645)	(166)	(13,374)
Net income attributable to noncontrolling interests in other partnerships	(6,626)	(1,843)	(12,553)	(3,333)
Preferred units distributions	(1,140)	(565)	(2,091)	(1,130)
Net income attributable to SL Green/SLGOP	(35,368)	239,279	11,647	389,106
Perpetual preferred stock dividends	(3,738)	(3,738)	(7,476)	(7,475)
Amounts attributable to SL Green common stockholders:
(Loss) income from continuing operations before purchase price fair value adjustment, gains on sale and discontinued operations	(39,846)	49,134	(9,467)	88,234
Purchase price fair value adjustment	0	68,909	0	69,027
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	740	1,393	740	102,492
Net income from discontinued operations	0	5,445	411	11,028
Gain on sale of discontinued operations	0	110,660	12,487	110,850
Net (loss) income attributable to SL Green common stockholders	$ (39,106)	$ 235,541	$ 4,171	$ 381,631
Basic earnings per share:
(Loss) income from continuing operations before purchase price fair value adjustment, gains on sale and discontinued operations (usd per share)	$ (0.40)	$ 0.52	$ (0.10)	$ 0.93
Purchase price fair value adjustment - net of OP (in usd per share)	0.00	0.72	0.00	0.72
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	0.01	0.02	0.01	1.08
Net income from discontinued operations (usd per share)	0.00	0.05	0.00	0.12
Gain on sale of discontinued operations (usd per share)	0.00	1.16	0.13	1.16
Net income attributable to SL Green common stockholders (usd per share)	(0.39)	2.47	0.04	4.01
Diluted earnings per share:
(Loss) income from continuing operations before purchase price fair value adjustment, gains on sale and discontinued operations (usd per share)	(0.40)	0.51	(0.10)	0.92
Purchase price fair value adjustment (in usd per share)	0.00	0.72	0.00	0.72
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	0.01	0.02	0.01	1.07
Net income from discontinued operations (usd per share)	0.00	0.06	0.00	0.12
Gain on sale of discontinued operations (usd per share)	0.00	1.15	0.13	1.16
Net income attributable to SL Green common stockholders (usd per share)	(0.39)	2.46	0.04	3.99
Dividends per share/unit (in usd per share)	$ 0.60	$ 0.50	$ 1.2	$ 1
Basic weighted average common shares outstanding (shares)	99,579	95,455	98,994	95,288
Diluted weighted average common shares and common share equivalents outstanding (in shares)	99,579	99,484	103,423	99,128
SL Green Operating Partnership
Revenues
Rental revenue, net	$ 304,226	$ 279,608	$ 607,555	$ 535,584
Escalation and reimbursement	41,407	38,576	82,376	76,383
Investment income	45,191	39,714	87,260	93,798
Other income	18,250	22,734	28,182	37,312
Total revenues	409,074	380,632	805,373	743,077
Expenses
Operating expenses, including $4,472 and $8,189 in 2015 and $4,567 and $8,080 in 2014 of related party expenses	70,114	69,098	146,891	139,010
Real estate taxes	56,286	51,804	112,009	104,154
Ground rent	8,086	8,040	16,274	16,073
Interest expense, net of interest income	75,746	77,870	151,553	154,048
Amortization of deferred financing costs	5,952	5,401	12,567	9,058
Depreciation and amortization	199,565	93,379	307,902	179,894
Transaction related costs	3,067	1,697	4,210	4,171
Marketing, general and administrative	23,200	23,872	48,664	47,128
Total expenses	442,016	331,161	800,070	653,536
(Loss) income from continuing operations before equity in net income from unconsolidated joint ventures, equity in net gain on sale of interest in unconsolidated joint venture/real estate, purchase price fair value adjustment and loss on early extinguishment of debt	(32,942)	49,471	5,303	89,541
Equity in net income from unconsolidated joint ventures	2,994	8,619	7,024	14,748
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	769	1,444	769	106,084
Purchase price fair value adjustment	0	71,446	0	71,446
Loss on early extinguishment of debt	0	(1,028)	(49)	(1,025)
(Loss) income from continuing operations	(29,179)	129,952	13,047	280,794
Net income from discontinued operations	0	5,645	427	11,414
Gain on sale of discontinued operations	0	114,735	12,983	114,735
Net (loss) income	(29,179)	250,332	26,457	406,943
Net loss (income) attributable to noncontrolling interests:
Net income attributable to noncontrolling interests in other partnerships	(6,626)	(1,843)	(12,553)	(3,333)
Preferred unit distributions	(1,140)	(565)	(2,091)	(1,130)
Net income attributable to SL Green/SLGOP	(36,945)	247,924	11,813	402,480
Perpetual preferred unit distributions	(3,738)	(3,738)	(7,476)	(7,475)
Net (loss) income attributable to SLGOP common unitholders	(40,683)	244,186	4,337	395,005
Amounts attributable to SL Green common stockholders:
(Loss) income from continuing operations before purchase price fair value adjustment, gains on sale and discontinued operations	(41,452)	50,916	(9,842)	91,326
Purchase price fair value adjustment	0	71,446	0	71,446
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	769	1,444	769	106,084
Net income from discontinued operations	0	5,645	427	11,414
Gain on sale of discontinued operations	$ 0	$ 114,735	$ 12,983	$ 114,735
Basic earnings per share:
(Loss) income from continuing operations before gains on sale and discontinued operations (in dollars per share)	$ (0.40)	$ 0.52	$ (0.10)	$ 0.93
Purchase price value adjustment (in usd per share)	0.00	0.72	0.00	0.72
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	0.01	0.02	0.01	1.08
Net income from discontinued operations (in dollars per share)	0.00	0.05	0.00	0.12
Gain on sale of discontinued operations (usd per share)	0.00	1.16	0.13	1.16
Net income attributable to SLGOP common unitholders (in dollars per share)	(0.39)	2.47	0.04	4.01
Diluted earnings per share:
(Loss) income from continuing operations before gains on sale and discontinued operations (in dollars per share)	(0.40)	0.51	(0.10)	0.92
Purchase price fair value adjustment (in usd per share)	0.00	0.72	0.00	0.72
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	0.01	0.02	0.01	1.07
Net income from discontinued operations (in dollars per share)	0.00	0.06	0.00	0.12
Gain on sale of discontinued operations (usd per share)	0.00	1.15	0.13	1.16
Net income attributable to SLGOP common unitholders (in dollars per share)	(0.39)	2.46	0.04	3.99
Dividends per share/unit (in usd per share)	$ 0.60	$ 0.50	$ 1.2	$ 1
Basic weighted average common units outstanding (in shares)	103,487	98,970	102,930	98,627
Diluted weighted average common units and common unit equivalents outstanding (in shares)	103,487	99,484	103,423	99,128