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Redeemable Partnership Units (Policy)	9 Months Ended
Sep. 30, 2012
Redeemable Noncontrolling Interests [Abstract]
Redeemable Noncontrolling Interests Policy [Text Block]	Redeemable partnership units on our consolidated balance sheets represent units held by third parties and are comprised of Class A units not held by Vornado and Series D-15 and D-16 cumulative redeemable preferred units. Redeemable partnership units on our consolidated balance sheets are recorded at the greater of their carrying amount or redemption value at the end of each reporting period. Changes in the value from period to period are charged to “partners' capital” on our consolidated balance sheets. Redeemable partnership units exclude our Series G-1 through G-4 convertible preferred units and Series D-13 cumulative redeemable preferred units, as they are accounted for as liabilities in accordance with ASC 480, Distinguishing Liabilities and Equity, because of their possible settlement by issuing a variable number of Vornado common shares.

Redeemable Partnership Units (Policy)

9 Months Ended

Sep. 30, 2012

Redeemable Noncontrolling Interests [Abstract]

Redeemable Noncontrolling Interests Policy [Text Block]

Redeemable partnership units on our consolidated balance sheets represent units held by third parties and are comprised of Class A units not held by Vornado and Series D-15 and D-16 cumulative redeemable preferred units. Redeemable partnership units on our consolidated balance sheets are recorded at the greater of their carrying amount or redemption value at the end of each reporting period. Changes in the value from period to period are charged to “partners' capital” on our consolidated balance sheets.

Redeemable partnership units exclude our Series G-1 through G-4 convertible preferred units and Series D-13 cumulative redeemable preferred units, as they are accounted for as liabilities in accordance with ASC 480, Distinguishing Liabilities and Equity, because of their possible settlement by issuing a variable number of Vornado common shares.