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ORGANIZATION (Details) $ in Thousands, ft² in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 15, 2015 USD ($) | Sep. 30, 2016 USD ($) ft² property | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) ft² property | Sep. 30, 2015 USD ($) | Dec. 31, 2015
Real Estate Properties [Line Items] |  |  |  |  |  |
Area of real estate property (in sq ft) | ft² |  | 14.8 |  | 14.8 |  |
Noncontrolling interest percentage |  | 6.00% |  | 6.00% |  |
Capital investment, in cash | $ 225,000 |  |  |  |  |
Transaction costs | 21,900 | $ 223 | $ 151 | $ 307 | $ 22,437 |
Costs contingent upon completion of separation | 17,400 |  |  | $ 0 | $ 17,403 |
Transaction costs contingent upon completion of the separation | $ 4,500 |  |  |  |  |
Vornado |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |
Noncontrolling interest percentage | 5.40% |  |  |  |  | 94.00%
Affiliated entity | Vornado |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |
Spinoff ratio | 0.50 |  |  |  |  |
Affiliated entity | VRLP |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |
Percentage of common shares distributed | 100.00% |  |  |  |  |
Spinoff ratio | 0.5 |  |  |  |  |
Warehouses |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |
Number of real estate properties | property |  | 1 |  | 1 |  |
Wholly owned properties | Shopping Center |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |
Number of real estate properties | property |  | 79 |  | 79 |  |
Wholly owned properties | Mall |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |
Number of real estate properties | property |  | 3 |  | 3 |  |

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