Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net income	$ 117,134	$ 66,627	$ 113,279	$ 193,741
Other comprehensive (loss) income:
Decrease in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	(51,313)	(3,590)	(50)	(54,325)
Increase (decrease) in unrealized value of marketable securities	506	1,992	248	(2,542)
Other comprehensive (loss) income	(50,807)	(1,598)	198	(56,867)
Comprehensive income	66,327	65,029	113,477	136,874
Net income attributable to noncontrolling interests and preferred units distributions	(8,065)	(6,446)	(7,936)	(15,021)
Net loss (income) attributable to noncontrolling interests	40	(1,023)	1,539	(730)
Other comprehensive loss attributable to noncontrolling interests	2,841	95	186	2,981
Comprehensive income attributable to SL Green/SLGOP	61,103	58,678	105,727	124,834
SL Green Operating Partnership
Net income	117,134	66,627	113,279	193,741
Other comprehensive (loss) income:
Decrease in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	(51,313)	(3,590)	(50)	(54,325)
Increase (decrease) in unrealized value of marketable securities	506	1,992	248	(2,542)
Other comprehensive (loss) income	(50,807)	(1,598)	198	(56,867)
Comprehensive income	66,327	65,029	113,477	136,874
Net loss (income) attributable to noncontrolling interests	40	(1,023)	1,539	(730)
Other comprehensive loss attributable to noncontrolling interests	2,841	95	186	2,981
Comprehensive income attributable to SL Green/SLGOP	$ 69,208	$ 64,101	$ 115,202	$ 139,125