Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
ASSETS
Deferred leasing costs, accumulated amortization	$ 201,522	$ 196,972
Identified intangible assets, accumulated amortization	$ 91,187	$ 93,113
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Preferred shares of beneficial interest: par value per share (in dollars per share)	$ 0	$ 0
Preferred shares of beneficial interest: authorized shares (shares)	110,000,000	110,000,000
Preferred shares of beneficial interest: issued shares (shares)	48,793,402	48,793,402
Preferred shares of beneficial interest: outstanding shares (shares)	48,793,402	48,793,402
Common shares of beneficial interest: par value per share (in dollars per share)	$ 0.04	$ 0.04
Common shares of beneficial interest: authorized shares (shares)	250,000,000	250,000,000
Common shares of beneficial interest: issued shares (shares)	191,560,756	191,354,679
Common shares of beneficial interest: outstanding shares (shares)	191,560,756	191,354,679
Class A Unit
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties (shares)	13,932,635	13,583,607
Cumulative Redeemable Preferred Unit
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties (shares)	141,401	141,401
Vornado Realty L.P.
ASSETS
Deferred leasing costs, accumulated amortization	$ 201,522	$ 196,972
Identified intangible assets, accumulated amortization	$ 91,187	$ 93,113
Vornado Realty L.P. \| Class A Unit
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties (shares)	13,932,635	13,583,607
Vornado Realty L.P. \| Cumulative Redeemable Preferred Unit
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties (shares)	141,401	141,401

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