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STORAGE FACILITIES (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
STORAGE FACILITIES |  |
Storage facilities | $ 3,260,426 | $ 3,117,198
Less: Accumulated depreciation | (549,206) | (492,069)
Storage facilities, net (including VIE assets of $75,448 and $49,829, respectively) | 2,711,220 | 2,625,129
Land |  |
STORAGE FACILITIES |  |
Storage facilities | 565,187 | 545,393
Buildings and improvements |  |
STORAGE FACILITIES |  |
Storage facilities | 2,387,241 | 2,304,653
Equipment |  |
STORAGE FACILITIES |  |
Storage facilities | 230,062 | 218,731
Construction in progress |  |
STORAGE FACILITIES |  |
Storage facilities | $ 77,936 | $ 48,421

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