Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ 12,211	$ 415,534	$ (12,253)	$ 528,813
Other comprehensive income:
Increase in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	50,488	6,615	111,378	6,565
Increase (decrease) in unrealized value of marketable securities	1,605	66	(642)	314
Other comprehensive income	52,093	6,681	110,736	6,879
Comprehensive income	64,304	422,215	98,483	535,692
Net income attributable to noncontrolling interests and preferred units distributions	(1,096)	(23,591)	(5,282)	(31,527)
Other comprehensive income attributable to noncontrolling interests	(3,114)	(415)	(6,404)	(229)
Comprehensive income attributable to SL Green	$ 60,094	$ 398,209	$ 86,797	$ 503,936