Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues
Rental revenue, net	$ 215,369	$ 281,329
Escalation and reimbursement	26,399	44,192
Investment income	45,290	40,299
Other income	14,637	11,561
Total revenues	301,695	377,381
Expenses
Operating expenses, including related party expenses of $3,834 in 2018 and $4,173 in 2017.	59,782	74,506
Real estate taxes	45,661	61,068
Ground rent	8,308	8,308
Interest expense, net of interest income	47,916	65,622
Amortization of deferred financing costs	3,537	4,761
Depreciation and amortization	69,388	94,134
Transaction related costs	162	133
Marketing, general and administrative	23,528	24,143
Total expenses	258,282	332,675
Income before equity in net income from unconsolidated joint ventures, equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate, purchase price and other fair value adjustments gain on sale of real estate, net, depreciable real estate reserves, and gain on sale of investment in marketable securities	43,413	44,706
Equity in net income from unconsolidated joint ventures	4,036	6,614
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(6,440)	2,047
Purchase price and other fair value adjustments	49,293	0
Gain on sale of real estate, net	23,521	567
Depreciable real estate reserves	0	(56,272)
Gain on sale of investment in marketable securities	0	3,262
Net income	113,823	924
Net (income) loss attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	(5,272)	(476)
Noncontrolling interests in other partnerships	(198)	17,491
Preferred units distributions	(2,849)	(2,850)
Net income (loss) attributable to SL Green/SLGOP	105,504	15,089
Perpetual preferred stock dividends	(3,738)	(3,738)
Amounts attributable to SL Green common stockholders:
Income before depreciable real estate reserves and gains on sale and fair value adjustments	38,657	62,660
Purchase price and other fair value adjustments	46,868	0
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(6,123)	1,957
Gain on sale of real estate, net	22,364	542
Depreciable real estate reserves	0	(53,808)
Net income attributable to SL Green common stockholders	$ 101,766	$ 11,351
Basic earnings per share:
Income (loss) before depreciable real estate reserves and gains (losses) on sale (in dollars per share)	$ 0.43	$ 0.62
Purchase price and other fair value adjustments (in dollars per share)	0.52	0.00
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (in dollars per share)	(0.07)	0.02
Gain on sale of real estate, net (in dollars per share)	0.24	0.01
Depreciable real estate reserves (in dollars per share)	0.00	(0.54)
Net income attributable to SL Green common stockholders (usd per share)	1.12	0.11
Diluted earnings per share:
Purchase price and other fair value adjustments (in dollars per share)	0.52	0.00
Income (loss) before depreciable real estate reserves and gains (losses) on sale (in dollars per share)	0.43	0.62
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (in dollars per share)	(0.07)	0.02
Gain on sale of real estate (in dollars per share)	0.24	0.01
Depreciable real estate reserves (in dollars per share)	0.00	(0.54)
Net income attributable to SL Green common stockholders (usd per share)	1.12	0.11
Dividends per share/unit (usd per share)	$ 0.8125	$ 0.775
Basic weighted average common shares outstanding (in shares)	90,520	100,643
Diluted weighted average common shares and common share equivalents outstanding (in shares)	95,256	105,554
SL Green Operating Partnership
Revenues
Rental revenue, net	$ 215,369	$ 281,329
Escalation and reimbursement	26,399	44,192
Investment income	45,290	40,299
Other income	14,637	11,561
Total revenues	301,695	377,381
Expenses
Operating expenses, including related party expenses of $3,834 in 2018 and $4,173 in 2017.	59,782	74,506
Real estate taxes	45,661	61,068
Ground rent	8,308	8,308
Interest expense, net of interest income	47,916	65,622
Amortization of deferred financing costs	3,537	4,761
Depreciation and amortization	69,388	94,134
Transaction related costs	162	133
Marketing, general and administrative	23,528	24,143
Total expenses	258,282	332,675
Income before equity in net income from unconsolidated joint ventures, equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate, purchase price and other fair value adjustments gain on sale of real estate, net, depreciable real estate reserves, and gain on sale of investment in marketable securities	43,413	44,706
Equity in net income from unconsolidated joint ventures	4,036	6,614
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(6,440)	2,047
Gain on sale of real estate, net	23,521	567
Depreciable real estate reserves	0	(56,272)
Gain on sale of investment in marketable securities	0	3,262
Net income	113,823	924
Net (income) loss attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	(5,272)
Noncontrolling interests in other partnerships	(198)	17,491
Preferred units distributions	(2,849)	(2,850)
Net income (loss) attributable to SL Green/SLGOP	110,776	15,565
Perpetual preferred unit distributions	(3,738)	(3,738)
Net income attributable to SLGOP common unitholders	107,038	11,827
Amounts attributable to SL Green common stockholders:
Income before depreciable real estate reserves and gains on sale and fair value adjustments	40,664	65,485
Purchase price and other fair value adjustments	49,293	0
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(6,440)	2,047
Gain on sale of real estate, net	23,521	567
Depreciable real estate reserves	$ 0	$ (56,272)
Basic earnings per share:
Income (loss) before depreciable real estate reserves and gains (losses) on sale (in dollars per share)	$ 0.43	$ 0.62
Purchase price and other fair value adjustments (in dollars per share)	0.52	0.00
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (in dollars per share)	(0.07)	0.02
Gain on sale of real estate, net (in dollars per share)	0.24	0.01
Depreciable real estate reserves (in dollars per share)	0.00	(0.54)
Net income attributable to SLGOP common unitholders (usd per share)	1.12	0.11
Diluted earnings per share:
Income (loss) before depreciable real estate reserves and gains (losses) on sale (in dollars per share)	0.43	0.62
Purchase price and other fair value adjustments (in dollars per share)	0.52	0.00
Equity in net gain on sale of interest in unconsolidated joint venture/real estate (in dollars per share)	(0.07)	0.02
Gain on sale of real estate (in dollars per share)	0.24	0.01
Depreciable real estate reserves (in dollars per share)	0.00	(0.54)
Net income attributable to SLGOP common unitholders (usd per share)	1.12	0.11
Dividends per share/unit (usd per share)	$ 0.8125	$ 0.775
Basic weighted average common shares outstanding (in shares)	95,203	105,250
Basic weighted average common units outstanding (in shares)	95,203	105,250
Diluted weighted average common units and common unit equivalents outstanding (in shares)	95,256	105,554