Real Estate Fund Investments (Narrative) (Details) $ in Thousands				1 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($) investment	May 20, 2022 USD ($)	Dec. 31, 2021 USD ($) investment	May 20, 2022 USD ($)	Jun. 30, 2022 USD ($) investment	Jun. 09, 2020 USD ($)
Investment Holdings
Aggregate fair value of real estate fund investments	$ 930		$ 7,730		$ 930
Vornado Capital Partners Real Estate Fund
Investment Holdings
Equity method ownership percentage	25.00%				25.00%
Term of the Fund, years					8 years
Investment period for commitments of the Fund, years					3 years
Investment fund period expiration date					2013-07
Investment fund, extension of term					2023-02
Crowne Plaza Times Square Hotel Joint Venture
Investment Holdings
Default amount						$ 274,355
Debt instrument, interest rate, stated percentage (percent)	5.40%				5.40%
Debt instrument, additional default interest, percentage	3.00%				3.00%
1100 Lincoln Road
Investment Holdings
Return of capital from real estate fund investments		$ 5,672
Net (loss) on sale of real estate				$ (53,724)
LIBOR | Crowne Plaza Times Square Hotel Joint Venture
Investment Holdings
Basis spread on variable rate (percent)					3.69%
Joint Venture | Crowne Plaza Times Square Hotel Joint Venture
Investment Holdings
Equity method ownership percentage	57.10%				57.10%
Joint Venture | Crowne Plaza Time Square Hotel | Crowne Plaza Times Square Hotel Joint Venture
Investment Holdings
Ownership percentage by noncontrolling owners	24.30%				24.30%
Real estate fund investments
Investment Holdings
Number of investments held by fund (investment) | investment	2		3		2
Aggregate fair value of real estate fund investments	$ 930		$ 7,730		$ 930
Real estate fund investments below cost	275,459				275,459
Unfunded commitments of fund	28,465				28,465
Real estate fund investments | Vornado Realty Trust
Investment Holdings
Unfunded commitments of fund	$ 8,849				$ 8,849