Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues
Rental revenue, net	$ 318,465	$ 291,293	$ 926,020	$ 826,877
Escalation and reimbursement	48,254	43,826	130,630	120,209
Investment income	49,328	43,969	136,588	137,767
Other income	16,019	11,186	44,201	48,498
Total revenues	432,066	390,274	1,237,439	1,133,351
Expenses
Operating expenses, including $5,238 and $13,415 in 2015 and $5,104 and $13,183 in 2014 of related party expenses	78,648	72,111	225,539	211,118
Real estate taxes	61,009	55,548	173,018	159,702
Ground rent	8,252	8,088	24,526	24,161
Interest expense, net of interest income	84,141	82,376	235,694	236,424
Amortization of deferred financing costs	7,160	6,679	19,727	15,737
Depreciation and amortization	146,185	94,443	454,087	274,337
Transaction related costs	5,829	2,383	10,039	6,554
Marketing, general and administrative	23,475	22,649	72,139	69,778
Total expenses	414,699	344,277	1,214,769	997,811
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, gain on sale of real estate, depreciable real estate reserves and loss on early extinguishment of debt	17,367	45,997	22,670	135,540
Equity in net income from unconsolidated joint ventures	3,627	6,034	10,651	20,781
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	15,281	16,496	16,050	122,580
Purchase price fair value adjustment	0	(4,000)	0	67,446
Gain on sale of real estate	159,704	0	159,704	0
Depreciable real estate reserves	(19,226)	0	(19,226)	0
Loss on early extinguishment of debt	0	(24,475)	(49)	(25,500)
Income from continuing operations	176,753	40,052	189,800	320,847
Net income from discontinued operations	0	4,035	427	15,449
Gain on sale of discontinued operations	0	29,507	12,983	144,242
Net income	176,753	73,594	203,210	480,538
Net income attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	(6,467)	(2,636)	(6,634)	(16,010)
Net income attributable to noncontrolling interests in other partnerships	(665)	(1,712)	(13,217)	(5,045)
Preferred units distributions	(2,225)	(820)	(4,316)	(1,950)
Net income attributable to SL Green/SLGOP	167,396	68,426	179,043	457,533
Perpetual preferred stock dividends	(3,738)	(3,738)	(11,214)	(11,214)
Amounts attributable to SL Green common stockholders:
Income from continuing operations before purchase price fair value adjustment, gains on sale and discontinued operations	13,768	20,312	4,357	108,710
Purchase price fair value adjustment	0	(3,856)	0	65,111
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	14,705	15,901	15,439	118,336
Net income from discontinued operations	0	3,889	411	14,914
Gain on sale of discontinued operations	0	28,442	12,489	139,248
Gain on sale of real estate	153,687	0	153,628	0
Depreciable real estate reserves	(18,502)	0	(18,495)	0
Net income attributable to SL Green common stockholders	$ 163,658	$ 64,688	$ 167,829	$ 446,319
Basic earnings per share:
Income from continuing operations before purchase price fair value adjustment, gains on sale and discontinued operations (usd per share)	$ 0.14	$ 0.21	$ 0.04	$ 1.14
Purchase price fair value adjustment (usd per share)	0.00	(0.04)	0.00	0.68
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	0.15	0.17	0.16	1.24
Net income from discontinued operations (usd per share)	0.00	0.04	0.00	0.16
Gain on sale of discontinued operations (usd per share)	0.00	0.30	0.13	1.46
Gain on sale of real estate (in dollars per share)	1.54	0.00	1.55	0.00
Depreciable Real Estate Reserves, Effect on Earnings, Per Basic Share	(0.19)	0.00	(0.19)	0.00
Net income attributable to SL Green common stockholders (usd per share)	1.64	0.68	1.69	4.68
Diluted earnings per share:
Income from continuing operations before purchase price fair value adjustment, gains on sale and discontinued operations (usd per share)	0.14	0.21	0.04	1.14
Purchase price fair value adjustment (usd per share)	0.00	(0.04)	0.00	0.68
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	0.15	0.17	0.16	1.23
Net income from discontinued operations (usd per share)	0.00	0.04	0.00	0.16
Gain on sale of discontinued operations (usd per share)	0.00	0.30	0.13	1.45
Gain on sale of real estate (in dollars per share)	1.54	0.00	1.54	0.00
Depreciable Real Estate Reserves, Effect on Earnings, Per Diluted Share	(0.19)	0.00	(0.19)	0.00
Net income attributable to SL Green common stockholders (usd per share)	1.64	0.68	1.68	4.66
Dividends per share/unit (usd per share)	$ 0.60	$ 0.5	$ 1.80	$ 1.50
Basic weighted average common shares outstanding (in shares)	99,621	95,734	99,205	95,437
Diluted weighted average common shares and common share equivalents outstanding (in shares)	103,929	99,706	103,609	99,322
SL Green Operating Partnership
Revenues
Rental revenue, net	$ 318,465	$ 291,293	$ 926,020	$ 826,877
Escalation and reimbursement	48,254	43,826	130,630	120,209
Investment income	49,328	43,969	136,588	137,767
Other income	16,019	11,186	44,201	48,498
Total revenues	432,066	390,274	1,237,439	1,133,351
Expenses
Operating expenses, including $5,238 and $13,415 in 2015 and $5,104 and $13,183 in 2014 of related party expenses	78,648	72,111	225,539	211,118
Real estate taxes	61,009	55,548	173,018	159,702
Ground rent	8,252	8,088	24,526	24,161
Interest expense, net of interest income	84,141	82,376	235,694	236,424
Amortization of deferred financing costs	7,160	6,679	19,727	15,737
Depreciation and amortization	146,185	94,443	454,087	274,337
Transaction related costs	5,829	2,383	10,039	6,554
Marketing, general and administrative	23,475	22,649	72,139	69,778
Total expenses	414,699	344,277	1,214,769	997,811
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, gain on sale of real estate, depreciable real estate reserves and loss on early extinguishment of debt	17,367	45,997	22,670	135,540
Equity in net income from unconsolidated joint ventures	3,627	6,034	10,651	20,781
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	15,281	16,496	16,050	122,580
Purchase price fair value adjustment	0	(4,000)	0	67,446
Gain on sale of real estate	159,704	0	159,704	0
Depreciable real estate reserves	(19,226)	0	(19,226)	0
Loss on early extinguishment of debt	0	(24,475)	(49)	(25,500)
Income from continuing operations	176,753	40,052	189,800	320,847
Net income from discontinued operations	0	4,035	427	15,449
Gain on sale of discontinued operations	0	29,507	12,983	144,242
Net income	176,753	73,594	203,210	480,538
Net income attributable to noncontrolling interests:
Net income attributable to noncontrolling interests in other partnerships	(665)	(1,712)	(13,217)	(5,045)
Preferred unit distributions	(2,225)	(820)	(4,316)	(1,950)
Net income attributable to SL Green/SLGOP	173,863	71,062	185,677	473,543
Perpetual preferred unit distributions	(3,738)	(3,738)	(11,214)	(11,214)
Net income attributable to SLGOP common unitholders	170,125	67,324	174,463	462,329
Amounts attributable to SL Green common stockholders:
Income from continuing operations before purchase price fair value adjustment, gains on sale and discontinued operations	14,366	21,286	4,525	112,612
Purchase price fair value adjustment	0	(4,000)	0	67,446
Equity in net gain on sale of interest in unconsolidated joint venture/real estate	15,281	16,496	16,050	122,580
Net income from discontinued operations	0	4,035	427	15,449
Gain on sale of discontinued operations	0	29,507	12,983	144,242
Gain on sale of real estate	159,704	0	159,704	0
Depreciable real estate reserves	$ (19,226)	$ 0	$ (19,226)	$ 0
Basic earnings per share:
Income from continuing operations before gains on sale and discontinued operations (usd per share)	$ 0.14	$ 0.21	$ 0.04	$ 1.14
Purchase price fair value adjustment (usd per share)	0.00	(0.04)	0.00	0.68
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	0.15	0.17	0.16	1.24
Net income from discontinued operations (usd per share)	0.00	0.04	0.00	0.16
Gain on sale of discontinued operations (usd per share)	0.00	0.30	0.13	1.46
Gain on sale of real estate (in dollars per share)	1.54	0.00	1.55	0.00
Depreciable Real Estate Reserves, Effect on Earnings, Per Basic Share	(0.19)	0.00	(0.19)	0.00
Net income attributable to SLGOP common unitholders (usd per share)	1.64	0.68	1.69	4.68
Diluted earnings per share:
Income from continuing operations before gains on sale and discontinued operations (usd per share)	0.14	0.21	0.04	1.14
Purchase price fair value adjustment (usd per share)	0.00	(0.04)	0.00	0.68
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (usd per share)	0.15	0.17	0.16	1.23
Net income from discontinued operations (usd per share)	0.00	0.04	0.00	0.16
Gain on sale of discontinued operations (usd per share)	0.00	0.30	0.13	1.45
Gain on sale of real estate (in dollars per share)	1.54	0.00	1.54	0.00
Depreciable Real Estate Reserves, Effect on Earnings, Per Diluted Share	(0.19)	0.00	(0.19)	0.00
Net income attributable to SLGOP common unitholders (usd per share)	1.64	0.68	1.68	4.66
Dividends per share/unit (usd per share)	$ 0.60	$ 0.50	$ 1.8	$ 1.50
Basic weighted average common units outstanding (in shares)	103,522	99,319	103,129	98,860
Diluted weighted average common units and common unit equivalents outstanding (in shares)	103,929	99,706	103,609	99,322