Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Rental revenue, net	$ 671,500	$ 678,176	$ 804,423
Investment income	81,113	80,340	120,163
Other income	74,126	85,475	128,158
Total revenues	826,739	843,991	1,052,744
Expenses
Operating expenses, including related party expenses of $5,701 in 2022, $12,377 in 2021 and $12,643 in 2020	174,063	167,153	183,200
Real estate taxes	138,228	152,835	176,315
Operating lease rent	26,943	26,554	29,043
Interest expense, net of interest income	89,473	70,891	116,679
Amortization of deferred financing costs	7,817	11,424	11,794
Depreciation and amortization	215,306	216,869	313,668
Loan loss and other investment reserves, net of recoveries	0	2,931	35,298
Transaction related costs	409	3,773	503
Marketing, general and administrative	93,798	94,912	91,826
Total expenses	746,037	747,342	958,326
Equity in net loss from unconsolidated joint ventures	(57,958)	(55,402)	(25,195)
Equity in net (loss) gain on sale of interest in unconsolidated joint venture/real estate	(131)	(32,757)	2,961
Purchase price and other fair value adjustments	(8,118)	210,070	187,522
(Loss) gain on sale of real estate, net	(84,485)	287,417	215,506
Depreciable real estate reserves and impairments	(6,313)	(23,794)	(60,454)
Loss on early extinguishment of debt	0	(1,551)	0
Net (loss) income	(76,303)	480,632	414,758
Net loss (income) attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	5,794	(25,457)	(20,016)
Net loss (income) attributable to noncontrolling interests in other partnerships	(1,122)	1,884	(14,940)
Preferred unit distributions	(6,443)	(7,305)	(8,747)
Net income (loss) attributable to SL Green/SLGOP	(78,074)	449,754	371,055
Perpetual preferred stock dividends	(14,950)	(14,950)	(14,950)
Net (loss) income attributable to SL Green common stockholders	$ (93,024)	$ 434,804	$ 356,105
Basic earnings per share (in dollars per share)	$ (1.49)	$ 6.57	$ 5.03
Diluted earnings per share (in dollars per share)	$ (1.49)	$ 6.50	$ 5.01
Basic weighted average common shares outstanding (in shares)	63,917	65,740	70,397
Diluted weighted average common shares and common share equivalents outstanding (in shares)	67,929	70,769	75,078