Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 270,856	$ 101,069	$ 278,911
Other comprehensive income:
Change in net unrealized (loss) gain on derivative instruments, including SL Green's/SLGOP's share of joint venture net unrealized (loss) gain on derivative instruments	(3,622)	1,040	28,508
Change in unrealized gain (loss) on marketable securities	60	(4,667)	3,677
Other comprehensive (loss) income	(3,562)	(3,627)	32,185
Comprehensive income	267,294	97,442	311,096
Net (income) loss attributable to noncontrolling interests and preferred units distributions	(23,594)	305	(29,015)
Net loss (income) attributable to noncontrolling interests	6	15,701	(7,644)
Other comprehensive income (loss) attributable to noncontrolling interests	66	94	(1,299)
Comprehensive income attributable to SL Green/SLGOP	243,766	97,841	280,782
SL Green Operating Partnership
Net income	270,856	101,069	278,911
Other comprehensive income:
Change in net unrealized (loss) gain on derivative instruments, including SL Green's/SLGOP's share of joint venture net unrealized (loss) gain on derivative instruments	(3,622)	1,040	28,508
Change in unrealized gain (loss) on marketable securities	60	(4,667)	3,677
Other comprehensive (loss) income	(3,562)	(3,627)	32,185
Comprehensive income	267,294	97,442	311,096
Net loss (income) attributable to noncontrolling interests	6	15,701	(7,644)
Other comprehensive income (loss) attributable to noncontrolling interests	66	94	(1,299)
Comprehensive income attributable to SL Green/SLGOP	$ 267,366	$ 113,237	$ 302,153