Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 480,632	$ 414,758	$ 291,487
Other comprehensive loss:
Increase (decrease) in unrealized value of derivative instruments, including SLGOP's share of joint venture derivative instruments	21,427	(39,743)	(47,118)
Increase (decrease) in unrealized value of marketable securities	104	(1,318)	1,249
Other comprehensive income (loss)	21,531	(41,061)	(45,869)
Comprehensive income	502,163	373,697	245,618
Net income attributable to noncontrolling interests and preferred units distributions	(30,878)	(43,703)	(21,053)
Other comprehensive (income) loss attributable to noncontrolling interests	(1,042)	2,299	2,276
Comprehensive income attributable to SL Green/SLGOP	$ 470,243	$ 332,293	$ 226,841