Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income	$ 415,534	$ 20,677	$ 528,813	$ 214,418
Other comprehensive income (loss):
Increase (decrease) in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	6,615	6,099	6,565	(48,227)
Increase (decrease) in unrealized value of marketable securities	66	389	314	(2,152)
Other comprehensive income (loss)	6,681	6,488	6,879	(50,379)
Comprehensive income	422,215	27,165	535,692	164,039
Net loss (income) attributable to noncontrolling interests	915	(414)	2,454	(1,145)
Net income attributable to noncontrolling interests and preferred units distributions	(23,591)	(3,080)	(31,527)	(18,101)
Other comprehensive (income) loss attributable to noncontrolling interests	(415)	(317)	(229)	2,664
Comprehensive income attributable to SL Green/SLGOP	398,209	23,768	503,936	148,602
SL Green Operating Partnership
Net income	415,534	20,677	528,813	214,418
Other comprehensive income (loss):
Increase (decrease) in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	6,615	6,099	6,565	(48,227)
Increase (decrease) in unrealized value of marketable securities	66	389	314	(2,152)
Other comprehensive income (loss)	6,681	6,488	6,879	(50,379)
Comprehensive income	422,215	27,165	535,692	164,039
Net loss (income) attributable to noncontrolling interests	915	(414)	2,454	(1,145)
Other comprehensive (income) loss attributable to noncontrolling interests	(415)	(317)	(229)	2,664
Comprehensive income attributable to SL Green/SLGOP	$ 422,715	$ 26,434	$ 537,917	$ 165,558