Stock-based Compensation (Performance Conditioned AO LTIP Units & Vornado Stock Options Narrative) (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds received from exercise of employee share options and other	$ 885,000	$ 899,000	$ 5,862,000
Vornado stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (years)	4 years
Stock options expiration term	10 years
Grants in period, weighted average grant date fair value (usd per share)			$ 12.28
Proceeds received from exercise of employee share options and other	$ 7,000	22,000	$ 3,516,000
Exercises in period, intrinsic value	$ 842	$ 5,500	859,000
Performance Conditioned AO LTIP Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options expiration term	10 years
Threshold percentage to satisfy performance based condition	110.00%
Threshold period to satisfy performance based condition	20 days
AO LTIP Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options expiration term	10 years
Threshold level, percent	100.00%
Special allocation	10.00%
Special distribution, percent	10.00%
Grant-date fair value			$ 4,319,000

Amount of cash inflow from exercise of option under share-based payment arrangement.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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