Stock-based Compensation	9 Months Ended
Sep. 30, 2011
Stock-based Compensation [Abstract]
Stock-based Compensation	14. Stock-based Compensation Vornado's Omnibus Share Plan (the “Plan”) provides for grants of incentive and non-qualified Vornado stock options, Vornado restricted stock, restricted units and out-performance plan rewards to certain of Vornado's employees and officers. We account for all stock-based compensation in accordance ASC 718, Compensation – Stock Compensation. Stock-based compensation expense for the three months ended September 30, 2011 and 2010 consists of Vornado stock option awards, Vornado restricted stock awards, unit awards and out-performance plan awards. Stock-based compensation expense was $7,320,000 and $11,210,000 in the three months ended September 30, 2011 and 2010, respectively, and $21,384,000 and $26,167,000 in the nine months ended September 30, 2011 and 2010, respectively.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

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-Publisher AICPA

-Name Statement of Position (SOP)

-Number 93-6

-Paragraph 53

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

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-Name Statement of Financial Accounting Standard (FAS)

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+ Details