Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues
Rental revenue, net	$ 680,105	$ 605,999	$ 683,335
SUMMIT Operator revenue	122,344	133,214	118,260
Investment income	29,377	24,353	34,705
Interest income from real estate loans held by consolidated securitization vehicles	62,734	18,980	0
Other income	108,486	103,726	77,410
Total revenues	1,003,046	886,272	913,710
Expenses
Operating expenses, including related party expenses of $9 in 2025, $7 in 2024 and $5 in 2023	226,099	189,598	196,696
Real estate taxes	155,023	128,187	143,757
Operating lease rent	24,423	24,423	27,292
SUMMIT Operator expenses	116,364	111,739	101,211
Interest expense, net of interest income	187,656	147,220	137,114
Amortization of deferred financing costs	7,054	6,619	7,837
SUMMIT Operator tax expense	3,259	730	9,201
Interest expense on senior obligations of consolidated securitization vehicles	60,693	14,634	0
Depreciation and amortization	255,713	207,443	247,810
Loan loss and other investment reserves, net of recoveries	(71,326)	0	6,890
Transaction related costs	13,942	401	1,099
Marketing, general and administrative	89,310	85,187	111,389
Total expenses	1,068,210	916,181	990,296
Equity in net loss from unconsolidated joint ventures	(56,143)	(179,695)	(76,509)
Loss from debt fund investments, net	(1,446)	0	0
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate	86,068	208,144	(13,368)
Purchase price and other fair value adjustments	(36,233)	88,966	(17,260)
(Loss) gain on sale of real estate, net	(2,143)	3,025	(32,370)
Depreciable real estate reserves and impairments	(32,092)	(104,071)	(382,374)
Gain on sale of marketable securities	10,232	0	0
Gain (loss) on early extinguishment of debt	0	43,762	(870)
Net (loss) income	(96,921)	30,222	(599,337)
Perpetual preferred stock dividends	(14,950)	(14,950)	(14,950)
Net (loss) income attributable to SL Green common stockholders	(111,860)	7,060	(579,509)
Net loss attributable to noncontrolling interests:
Noncontrolling interests in the Operating Partnership	7,673	(497)	37,465
Noncontrolling interests in other partnerships	(971)	(928)	(4,568)
Preferred units distributions	(8,633)	(8,643)	(7,255)
Net (loss) income attributable to SL Green	$ (96,910)	$ 22,010	$ (564,559)
Basic earnings (loss) per share (in dollars per share)	$ (1.61)	$ 0.08	$ (9.12)
Diluted earnings (loss) per share (in dollars per share)	$ (1.61)	$ 0.08	$ (9.12)
Basic weighted average common shares outstanding (in shares)	70,443	65,062	63,809
Diluted weighted average common shares and common share equivalents outstanding (in shares)	70,443	65,688	67,972