Subsequent Events	12 Months Ended
Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	25. Subsequent Events 2016 Out-Performance Plan On January 14, 2016, the Compensation Committee approved the 2016 Outperformance Plan, a multi-year, performance-based equity compensation plan and related form of award agreement (the “2016 OPP”). Awards under the 2016 OPP constitute awards under Vornado's shareholder approved 2010 Omnibus Share Plan. Under the 2016 OPP, participants, including our Chairman and Chief Executive Officer, have the opportunity to earn compensation payable in the form of operating partnership units if, and only if, we outperform a predetermined total shareholder return (“TSR”) and/or outperform the market with respect to relative total TSR during a three-year performance period. Specifically, awards under our 2016 OPP may potentially be earned if we (i) achieve a TSR above that of the SNL US REIT Index (the “Index”) over a three-year performance period (the “Relative Component”) and/or (ii) achieve a TSR level greater than 7% per annum, or 21% over the three-year performance period (the “Absolute Component”). To the extent awards would be earned under the Absolute Component but we underperform the Index, such awards earned under the Absolute Component would be reduced (and potentially fully negated) based on the degree to which we underperform the Index. In certain circumstances, in the event we outperform the Index but awards would not otherwise be earned under the Absolute Component, awards may still be earned under the Relative Component. Moreover, to the extent awards would otherwise be earned under the Relative Component but we fail to achieve at least a 3% per annum absolute TSR, such awards earned under the Relative Component would be reduced based on our absolute TSR performance, with no awards being earned in the event our TSR during the applicable measurement period is 0% or negative, irrespective of the degree to which it may outperform the Index. If the designated performance objectives are achieved, OPP Units are also subject to time-based vesting requirements. Dividend payments on awards issued accrue during the performance period and are paid to participants if, and only if, awards are ultimately earned based on the achievement of the designated performance objectives. In addition, all of our executive officers (for the purposes of Section 16 of the Exchange Act) are required to hold any earned OPP Units for one year following vesting. 770 Broadway Refinancing On February 8, 2016, we completed a $700,000,000 refinancing of 770 Broadway, a 1,158,000 square foot Manhattan office building. The five-year loan is interest-only at LIBOR plus 1.75% (2.18% at February 11, 2016) which was swapped for four and a half years to a fixed rate of 2.56%. We realized net proceeds of approximately $330,000,000. The property was previously encumbered by a 5.65%, $353,000,000 mortgage maturing in March 2016.

Subsequent Events

12 Months Ended

Dec. 31, 2015

25. Subsequent Events

2016 Out-Performance Plan

On January 14, 2016, the Compensation Committee approved the 2016 Outperformance Plan, a multi-year, performance-based equity compensation plan and related form of award agreement (the “2016 OPP”). Awards under the 2016 OPP constitute awards under Vornado's shareholder approved 2010 Omnibus Share Plan. Under the 2016 OPP, participants, including our Chairman and Chief Executive Officer, have the opportunity to earn compensation payable in the form of operating partnership units if, and only if, we outperform a predetermined total shareholder return (“TSR”) and/or outperform the market with respect to relative total TSR during a three-year performance period. Specifically, awards under our 2016 OPP may potentially be earned if we (i) achieve a TSR above that of the SNL US REIT Index (the “Index”) over a three-year performance period (the “Relative Component”) and/or (ii) achieve a TSR level greater than 7% per annum, or 21% over the three-year performance period (the “Absolute Component”). To the extent awards would be earned under the Absolute Component but we underperform the Index, such awards earned under the Absolute Component would be reduced (and potentially fully negated) based on the degree to which we underperform the Index. In certain circumstances, in the event we outperform the Index but awards would not otherwise be earned under the Absolute Component, awards may still be earned under the Relative Component. Moreover, to the extent awards would otherwise be earned under the Relative Component but we fail to achieve at least a 3% per annum absolute TSR, such awards earned under the Relative Component would be reduced based on our absolute TSR performance, with no awards being earned in the event our TSR during the applicable measurement period is 0% or negative, irrespective of the degree to which it may outperform the Index. If the designated performance objectives are achieved, OPP Units are also subject to time-based vesting requirements. Dividend payments on awards issued accrue during the performance period and are paid to participants if, and only if, awards are ultimately earned based on the achievement of the designated performance objectives. In addition, all of our executive officers (for the purposes of Section 16 of the Exchange Act) are required to hold any earned OPP Units for one year following vesting.

770 Broadway Refinancing

On February 8, 2016, we completed a $700,000,000 refinancing of 770 Broadway, a 1,158,000 square foot Manhattan office building. The five-year loan is interest-only at LIBOR plus 1.75% (2.18% at February 11, 2016) which was swapped for four and a half years to a fixed rate of 2.56%. We realized net proceeds of approximately $330,000,000. The property was previously encumbered by a 5.65%, $353,000,000 mortgage maturing in March 2016.