Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
ASSETS
Tenant and other receivables, allowance for doubtful accounts	$ 5,539	$ 6,708
Receivable arising from the straight-lining of rents, allowance	1,215	2,227
Deferred leasing costs, accumulated amortization	186,041	170,952
Identified intangible assets, accumulated amortization	$ 144,683	$ 194,422
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	110,000,000	110,000,000
Preferred shares of beneficial interest: issued shares	42,823,428	42,824,829
Preferred shares of beneficial interest: outstanding shares	42,823,428	42,824,829
Common shares of beneficial interest: par value per share (in dollars per share)	$ 0.04	$ 0.04
Common shares of beneficial interest: authorized shares	250,000,000	250,000,000
Common shares of beneficial interest: issued shares	189,877,859	189,100,876
Common shares of beneficial interest: outstanding shares	189,877,859	189,100,876
Class A Unit
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties	12,555,623	12,197,162
Series D Cumulative Redeemable Preferred Unit
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties	177,101	177,101
Vornado Realty L.P.
ASSETS
Tenant and other receivables, allowance for doubtful accounts	$ 5,539	$ 6,708
Receivable arising from the straight-lining of rents, allowance	1,215	2,227
Deferred leasing costs, accumulated amortization	186,041	170,952
Identified intangible assets, accumulated amortization	$ 144,683	$ 194,422
Vornado Realty L.P. | Class A Unit
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties	12,555,623	12,197,162
Vornado Realty L.P. | Series D Cumulative Redeemable Preferred Unit
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Outstanding Partnership Units held by Third Parties	177,101	177,101