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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Operating Partnership Ownership |  |  |
Increase to OP units owned by third parties and a corresponding decrease to capital | $ 14,761us-gaap_MinorityInterestChangeInRedemptionValue | $ 3,292us-gaap_MinorityInterestChangeInRedemptionValue | $ 19,520us-gaap_MinorityInterestChangeInRedemptionValue
Minimum |  |  |
Depreciation and Amortization |  |  |
Useful lives of self-storage facilities and improvements | 5 years |  |
Maximum |  |  |
Depreciation and Amortization |  |  |
Useful lives of self-storage facilities and improvements | 39 years |  |
CubeSmart, L.P. and Subsidiaries |  |  |
Operating Partnership Ownership |  |  |
Increase to OP units owned by third parties and a corresponding decrease to capital | $ 14,761us-gaap_MinorityInterestChangeInRedemptionValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | $ 3,292us-gaap_MinorityInterestChangeInRedemptionValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | $ 19,520us-gaap_MinorityInterestChangeInRedemptionValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember

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- Definition Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest. + References No definition available. + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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