Related Party Transactions (Fees to Vornado) (Details) - Vornado - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary of fees to Vornado
Fees to related party	$ 11,331	$ 8,616	$ 12,630
Company management fees
Summary of fees to Vornado
Fees to related party	2,800	2,800	2,800
Development fees
Summary of fees to Vornado
Fees to related party	141	489	29
Leasing fees
Summary of fees to Vornado
Fees to related party	1,800	276	4,786
Commission on sales of real estate
Summary of fees to Vornado
Fees to related party	1,050	0	0
Property management, cleaning, engineering and security fees
Summary of fees to Vornado
Fees to related party	$ 5,540	$ 5,051	$ 5,015