Noncontrolling Interests on the Company's Consolidated Financial Statements - Preferred Unit Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Rollforward Analysis of Preferred Unit Activity
Redemption of preferred units	$ (15,631)	$ (9,216)
SL Green Operating Partnership | Preferred Units
Rollforward Analysis of Preferred Unit Activity
Balance at beginning of year	164,210	166,501
Issuance of preferred units	4,320	0
Redemption of preferred units	0	(2,503)
Dividends paid on preferred units	(6,200)	(4,453)
Accrued dividends on preferred units	6,230	4,665
Balance at end of year	$ 168,560	$ 164,210