Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 13,485	$ (3,855)
Other comprehensive loss:
Increase in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	43,567	51,263
Decrease in unrealized value of marketable securities	(1,793)	(258)
Other comprehensive income	41,774	51,005
Comprehensive income	55,259	47,150
Net (income) loss attributable to noncontrolling interests and preferred units distributions	(1,996)	129
Other comprehensive income attributable to noncontrolling interests	(2,277)	(2,655)
Comprehensive income attributable to SL Green/SLGOP	$ 50,986	$ 44,624