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NONCONTROLLING INTERESTS (Details 2) - USD ($) $ in Thousands |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
May. 14, 2015 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014
Operating Partnership Ownership |  |  |  |
OP units issued (in shares) | 20,408 |  |  |
Issuance of OP Units | $ 500 |  |  |
Additional consideration to be paid upon the completion of certain milestones within a specified period from closing | $ 1,500 |  |  |
Acrrued liability relating to the additional consideration to be paid in the acquisition of real property |  | $ 200 |  |
Increase to OP units owned by third parties and a corresponding decrease to capital |  | $ 2,913 | $ 5,830 | $ 14,800
CubeSmart, L.P. and Subsidiaries |  |  |  |
Operating Partnership Ownership |  |  |  |
OP Units outstanding which are not owned by the general partner (as a percent) |  | 1.30% |  | 1.40%
Number of trading days used to determine average of the closing prices of the common shares |  | 10 days |  |
OP units outstanding (in shares) |  | 2,265,650 |  | 2,257,486
Increase to OP units owned by third parties and a corresponding decrease to capital |  | $ 2,913 | $ 5,830 |

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