Investments in Partially Owned Entities (50-70 West 93rd Street) (Details) - USD ($) $ in Thousands		12 Months Ended
	May 13, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of real estate		$ 31,605	$ 24,484	$ 88,019
Residential Building | 50-70 West 93rd Street
Schedule of Equity Method Investments [Line Items]
Ownership percentage	49.90%
Proceeds from sale of real estate	$ 2,000
Net gain on sale of land	873
Residential Building | 50-70 West 93rd Street | Participating Mortgages
Schedule of Equity Method Investments [Line Items]
Debt amount	$ 83,500