Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 30,222	$ (599,337)	$ (76,303)
Other comprehensive income (loss):
Increase (decrease) in unrealized value of derivative instruments, including SL Green's share of joint venture derivative instruments	318	(32,437)	103,629
Increase (decrease) in unrealized value of marketable securities	552	(1,650)	(1,440)
Other comprehensive income (loss)	870	(34,087)	102,189
Comprehensive income (loss)	31,092	(633,424)	25,886
Net (income) loss attributable to noncontrolling interests and preferred units distributions	(8,212)	34,778	(1,771)
Other comprehensive (income) loss attributable to noncontrolling interests	(151)	1,960	(5,827)
Comprehensive income attributable to SL Green/SLGOP	$ 22,729	$ (596,686)	$ 18,288