Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income	$ 66,627	$ 173,741	$ 193,741	$ 226,510
Other comprehensive loss:
Decrease in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	(3,590)	(26,220)	(54,325)	(47,105)
Increase (decrease) in unrealized value of marketable securities	1,992	572	(2,542)	1,341
Other comprehensive loss	(1,598)	(25,648)	(56,867)	(45,764)
Comprehensive income	65,029	148,093	136,874	180,746
Net income attributable to noncontrolling interests and preferred units distributions	(6,446)	(8,901)	(15,021)	(14,140)
Net loss (income) attributable to noncontrolling interests	(1,023)	2,138	(730)	1,900
Other comprehensive loss attributable to noncontrolling interests	95	1,258	2,981	2,261
Comprehensive income attributable to SL Green/SLGOP	58,678	140,450	124,834	168,867
SL Green Operating Partnership
Net income	66,627	173,741	193,741	226,510
Other comprehensive loss:
Decrease in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	(3,590)	(26,220)	(54,325)	(47,105)
Increase (decrease) in unrealized value of marketable securities	1,992	572	(2,542)	1,341
Other comprehensive loss	(1,598)	(25,648)	(56,867)	(45,764)
Comprehensive income	65,029	148,093	136,874	180,746
Net loss (income) attributable to noncontrolling interests	(1,023)	2,138	(730)	1,900
Other comprehensive loss attributable to noncontrolling interests	95	1,258	2,981	2,261
Comprehensive income attributable to SL Green/SLGOP	$ 64,101	$ 151,489	$ 139,125	$ 184,907