Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income	$ 291,487	$ 270,856	$ 101,069
Other comprehensive (loss) income:
(Decrease) increase in unrealized value of derivative instruments, including SLGOP's share of joint venture derivative instruments	(47,118)	(3,622)	1,040
Increase (decrease) in unrealized value of marketable securities	1,249	60	(4,667)
Other comprehensive loss	(45,869)	(3,562)	(3,627)
Comprehensive income	245,618	267,294	97,442
Net (income) loss attributable to noncontrolling interests and preferred units distributions	(21,053)	(23,594)	305
Net loss attributable to noncontrolling interests	3,159	6	15,701
Other comprehensive loss attributable to noncontrolling interests	2,276	66	94
Comprehensive income attributable to SL Green/SLGOP	226,841	243,766	97,841
SL Green Operating Partnership
Net income	291,487	270,856	101,069
Other comprehensive (loss) income:
(Decrease) increase in unrealized value of derivative instruments, including SLGOP's share of joint venture derivative instruments	(47,118)	(3,622)	1,040
Increase (decrease) in unrealized value of marketable securities	1,249	60	(4,667)
Other comprehensive loss	(45,869)	(3,562)	(3,627)
Comprehensive income	245,618	267,294	97,442
Net loss attributable to noncontrolling interests	3,159	6	15,701
Other comprehensive loss attributable to noncontrolling interests	2,276	66	94
Comprehensive income attributable to SL Green/SLGOP	$ 251,053	$ 267,366	$ 113,237