Consolidated Statements of Operations (Partnership) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues
Rental revenue, net	$ 683,335	$ 671,500	$ 678,176
SUMMIT Operator revenue	118,260	89,048	16,311
Investment income	34,705	81,113	80,340
Other income	77,410	77,793	86,483
Total revenues	913,710	919,454	861,310
Expenses
Real estate taxes	143,757	138,228	152,835
Operating lease rent	27,292	26,943	26,554
SUMMIT Operator expenses	101,211	89,207	16,219
Interest expense, net of interest income	137,114	89,473	70,891
Amortization of deferred financing costs	7,837	7,817	11,424
SUMMIT Operator tax expense	9,201	2,647	1,000
Depreciation and amortization	247,810	216,167	216,969
Loan loss and other investment reserves, net of recoveries	6,890	0	2,931
Transaction related costs	1,099	409	3,773
Marketing, general and administrative	111,389	93,798	94,912
Total expenses	990,296	838,752	764,661
Equity in net loss from unconsolidated joint ventures	(76,509)	(57,958)	(55,402)
Equity in net loss on sale of interest in unconsolidated joint venture/real estate	(13,368)	(131)	(32,757)
Purchase price and other fair value adjustments	(17,260)	(8,118)	210,070
(Loss) gain on sale of real estate, net	(32,370)	(84,485)	287,417
Depreciable real estate reserves and impairments	(382,374)	(6,313)	(23,794)
Loss on early extinguishment of debt	(870)	0	(1,551)
Net (loss) income	(599,337)	(76,303)	480,632
Net loss (income) attributable to noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in other partnerships	4,568	(1,122)	1,884
Preferred units distributions	(7,255)	(6,443)	(7,305)
Net income (loss) attributable to SL Green/SLGOP	(564,559)	(78,074)	449,754
Perpetual preferred unit dividends	(14,950)	(14,950)	(14,950)
Related party
Revenues
Other income		1,400	1,700
Expenses
Operating expenses, including related party expenses of $5 in 2023, $5,701 in 2022 and $12,377 in 2021	5	5,701	12,377
SL Green Operating Partnership
Revenues
Rental revenue, net	683,335	671,500	678,176
SUMMIT Operator revenue	118,260	89,048	16,311
Investment income	34,705	81,113	80,340
Other income	77,410	77,793	86,483
Total revenues	913,710	919,454	861,310
Expenses
Operating expenses, including related party expenses of $5 in 2023, $5,701 in 2022 and $12,377 in 2021	196,696	174,063	167,153
Real estate taxes	143,757	138,228	152,835
Operating lease rent	27,292	26,943	26,554
SUMMIT Operator expenses	101,211	89,207	16,219
Interest expense, net of interest income	137,114	89,473	70,891
Amortization of deferred financing costs	7,837	7,817	11,424
SUMMIT Operator tax expense	9,201	2,647	1,000
Depreciation and amortization	247,810	216,167	216,969
Loan loss and other investment reserves, net of recoveries	6,890	0	2,931
Transaction related costs	1,099	409	3,773
Marketing, general and administrative	111,389	93,798	94,912
Total expenses	990,296	838,752	764,661
Equity in net loss from unconsolidated joint ventures	(76,509)	(57,958)	(55,402)
Equity in net loss on sale of interest in unconsolidated joint venture/real estate	(13,368)	(131)	(32,757)
Purchase price and other fair value adjustments	(17,260)	(8,118)	210,070
(Loss) gain on sale of real estate, net	(32,370)	(84,485)	287,417
Depreciable real estate reserves and impairments	(382,374)	(6,313)	(23,794)
Loss on early extinguishment of debt	(870)	0	(1,551)
Net (loss) income	(599,337)	(76,303)	480,632
Net loss (income) attributable to noncontrolling interests:
Net loss (income) attributable to noncontrolling interests in other partnerships	4,568	(1,122)	1,884
Preferred units distributions	(7,255)	(6,443)	(7,305)
Net income (loss) attributable to SL Green/SLGOP	(602,024)	(83,868)	475,211
Perpetual preferred unit dividends	(14,950)	(14,950)	(14,950)
Net (loss) income attributable to SLGOP common unitholders	$ (616,974)	$ (98,818)	$ 460,261
Basic (loss) earnings per unit (in dollars per share)	$ (9.12)	$ (1.49)	$ 6.57
Diluted (loss) earnings per unit (in dollars per share)	$ (9.12)	$ (1.49)	$ 6.50
Basic weighted average common units outstanding (in shares)		67,929	69,727
Diluted weighted average common units and common unit equivalents outstanding (in shares)	67,972	67,929	70,769
SL Green Operating Partnership | Related party
Expenses
Operating expenses, including related party expenses of $5 in 2023, $5,701 in 2022 and $12,377 in 2021	$ 5	$ 5,701	$ 12,377