Investments in Partially Owned Entities - Fifth Avenue and Times Square JV (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($)
Fifth Avenue and Times Square JV
Schedule Of Equity Method Investments
Equity method ownership percentage	51.50%
Joint Venture \| Fifth Avenue and Times Square JV
Schedule Of Equity Method Investments
Aggregate of preferred equity interests	$ 1,828,000
Debt instrument, interest rate, stated percentage (percent)	4.25%
Joint Venture \| Investors \| Fifth Avenue and Times Square JV
Schedule Of Equity Method Investments
Equity method ownership percentage	48.50%
Equity method effective ownership percentage	47.20%
Vornado Realty Trust \| Joint Venture \| Fifth Avenue and Times Square JV
Schedule Of Equity Method Investments
Equity method ownership percentage	51.50%
Equity method effective ownership percentage	51.00%
Percentage After Fifth Anniversary \| Joint Venture \| Fifth Avenue and Times Square JV
Schedule Of Equity Method Investments
Debt instrument, interest rate, stated percentage (percent)	4.75%
Building Maintenance Service \| Majority-Owned Subsidiary
Schedule Of Equity Method Investments
Revenue from related parties	$ 1,032
Building Maintenance Service
Schedule Of Equity Method Investments
Other real estate revenue from equity method investees	$ 1,025

Contractual interest rate for funds borrowed, under the debt agreement.

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