Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (76,303)	$ 480,632	$ 414,758
Other comprehensive income (loss):
Increase (decrease) in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	103,629	21,427	(39,743)
(Decrease) increase in unrealized value of marketable securities	(1,440)	104	(1,318)
Other comprehensive income (loss)	102,189	21,531	(41,061)
Comprehensive income	25,886	502,163	373,697
Net income attributable to noncontrolling interests and preferred units distributions	(1,771)	(30,878)	(43,703)
Other comprehensive (income) loss attributable to noncontrolling interests	(5,827)	(1,042)	2,299
Comprehensive income attributable to SL Green/SLGOP	$ 18,288	$ 470,243	$ 332,293