Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues
Rental revenue, net	$ 195,515	$ 248,028	$ 614,032	$ 733,105
Investment income	22,988	51,518	101,464	153,167
Other income	31,341	14,088	102,350	44,641
Total revenues	249,844	313,634	817,846	930,913
Expenses
Operating expenses, including related party expenses of $2,801 and $9,289 in 2020 and $5,460 and $13,575 in 2019	45,910	59,847	140,673	175,862
Real estate taxes	43,522	49,626	131,805	143,008
Operating lease rent	6,973	8,295	22,171	24,891
Interest expense, net of interest income	23,536	48,112	91,100	145,797
Amortization of deferred financing costs	3,151	3,112	8,312	8,566
Depreciation and amortization	92,516	70,464	256,736	208,268
Loan loss and other investment reserves, net of recoveries	8,957	0	27,018	0
Transaction related costs	45	44	483	360
Marketing, general and administrative	23,602	23,841	66,682	75,300
Total expenses	248,212	263,341	744,980	782,052
Equity in net loss from unconsolidated joint ventures	(432)	(9,864)	(15,445)	(22,644)
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	0	0	0	76,181
Purchase price and other fair value adjustments	0	3,799	0	69,389
Gain on sale of real estate, net	26,104	3,541	163,624	2,492
Depreciable real estate reserves and impairment	(6,627)	(7,047)	(6,627)	(7,047)
Net income	20,677	40,722	214,418	267,232
Net (income) loss attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	(802)	(1,719)	(10,073)	(12,306)
Noncontrolling interests in other partnerships	(414)	624	(1,145)	2,524
Preferred units distributions	(1,864)	(2,732)	(6,883)	(8,185)
Net income (loss) attributable to SL Green/SLGOP	17,597	36,895	196,317	249,265
Perpetual preferred stock dividends	(3,738)	(3,738)	(11,213)	(11,213)
Net income attributable to SL Green common stockholders	$ 13,859	$ 33,157	$ 185,104	$ 238,052
Basic earnings per share (usd per share)	$ 0.19	$ 0.40	$ 2.44	$ 2.87
Diluted earnings per share (usd per share)	$ 0.19	$ 0.40	$ 2.44	$ 2.87
Basic weighted average common shares outstanding (in shares)	73,020	82,292	75,521	82,855
Diluted weighted average common shares and common share equivalents outstanding (in shares)	77,491	86,714	80,085	87,309
Operating expenses, paid to related parties	$ 2,801	$ 5,460	$ 9,289	$ 13,575
SL Green Operating Partnership
Revenues
Rental revenue, net	195,515	248,028	614,032	733,105
Investment income	22,988	51,518	101,464	153,167
Other income	31,341	14,088	102,350	44,641
Total revenues	249,844	313,634	817,846	930,913
Expenses
Operating expenses, including related party expenses of $2,801 and $9,289 in 2020 and $5,460 and $13,575 in 2019	45,910	59,847	140,673	175,862
Real estate taxes	43,522	49,626	131,805	143,008
Operating lease rent	6,973	8,295	22,171	24,891
Interest expense, net of interest income	23,536	48,112	91,100	145,797
Amortization of deferred financing costs	3,151	3,112	8,312	8,566
Depreciation and amortization	92,516	70,464	256,736	208,268
Loan loss and other investment reserves, net of recoveries	8,957	0	27,018	0
Transaction related costs	45	44	483	360
Marketing, general and administrative	23,602	23,841	66,682	75,300
Total expenses	248,212	263,341	744,980	782,052
Equity in net loss from unconsolidated joint ventures	(432)	(9,864)	(15,445)	(22,644)
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	0	0	0	76,181
Purchase price and other fair value adjustments	0	3,799	0	69,389
Gain on sale of real estate, net	26,104	3,541	163,624	2,492
Depreciable real estate reserves and impairment	(6,627)	(7,047)	(6,627)	(7,047)
Net income	20,677	40,722	214,418	267,232
Net (income) loss attributable to noncontrolling interests:
Noncontrolling interests in other partnerships	(414)	624	(1,145)	2,524
Preferred units distributions	(1,864)	(2,732)	(6,883)	(8,185)
Net income (loss) attributable to SL Green/SLGOP	18,399	38,614	206,390	261,571
Perpetual preferred unit distributions	(3,738)	(3,738)	(11,213)	(11,213)
Net income attributable to SLGOP common unitholders	$ 14,661	$ 34,876	$ 195,177	$ 250,358
Basic earnings per unit (usd per share)	$ 0.19	$ 0.40	$ 2.44	$ 2.87
Diluted earnings per unit (usd per share)	$ 0.19	$ 0.40	$ 2.44	$ 2.87
Basic weighted average common units outstanding (in shares)	77,049	86,550	79,644	87,138
Diluted weighted average common units and common unit equivalents outstanding (in shares)	77,491	86,714	80,085	87,309
Operating expenses, paid to related parties	$ 2,801	$ 5,460	$ 9,289	$ 13,575