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STORAGE FACILITIES (Details 2) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 property | Dec. 31, 2013 property | Dec. 31, 2012 property
Acquisitions |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 53cube_NumberOfRealEstatePropertiesAcquired / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember | 20cube_NumberOfRealEstatePropertiesAcquired / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember | 37cube_NumberOfRealEstatePropertiesAcquired / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price | $ 568,226us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember | $ 189,822us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember | $ 432,340us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Connecticut Asset Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ConnecticutAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 4,950us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ConnecticutAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Florida Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 14,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Florida Assets Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 2cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetsTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 14,450us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetsTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | California Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_CaliforniaAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 8,300us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_CaliforniaAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Maryland Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MarylandAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 15,375us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MarylandAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Maryland Asset Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MarylandAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 8,200us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MarylandAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Maryland Asset Three |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MarylandAssetThreeMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 15,800us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MarylandAssetThreeMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Maryland Asset Four |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MarylandAssetFourMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 15,500us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MarylandAssetFourMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Arizona Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ArizonaAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 14,750us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ArizonaAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Pennsylvania Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_PennsylvaniaAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 7,350us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_PennsylvaniaAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Texas Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 8,225us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Texas Asset Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 6,450us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | New York Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 2cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_NewYorkAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 55,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_NewYorkAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Florida Asset Three |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetThreeMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 11,406us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetThreeMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Massachusetts Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MassachusettsAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 11,100us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MassachusettsAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Indiana Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_IndianaAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 8,400us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_IndianaAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Florida Assets Four |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 3cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetsFourMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 35,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetsFourMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Florida Assets Five |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 2cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetsFiveMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 15,800us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetsFiveMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Massachusetts Asset Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MassachusettsAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 23,100us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MassachusettsAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Texas Asset Three |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetThreeMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 7,700us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetThreeMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Texas Asset Four |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetFourMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 8,500us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetFourMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Texas Asset Five |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetFiveMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 7,750us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetFiveMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | HSRE Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 22cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_HsreAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 195,500us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_HsreAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Texas Asset Six |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetSixMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 18,650us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetSixMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Florida Assets Six |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 3cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetsSixMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 18,200us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetsSixMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | New York Asset Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_NewYorkAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 38,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_NewYorkAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Texas Asset Seven |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetSevenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Purchase / Sales Price | 4,345us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetSevenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |  |
Acquisitions | Arizona Asset Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ArizonaAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 6,900us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ArizonaAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Illinois Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_IllinoisAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 8,300us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_IllinoisAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Florida Asset Seven |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetSevenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 7,150us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetSevenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Florida Asset Eight |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetEightMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 9,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetEightMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Massachusetts Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MassachusettsAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 10,600us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MassachusettsAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Maryland / New Jersey Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 5cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MarylandNewJerseyAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 52,400us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MarylandNewJerseyAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | New York Asset Three |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_NewYorkAssetThreeMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 13,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_NewYorkAssetThreeMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Texas Asset Eight |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetEightMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 10,975us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetEightMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Arizona Asset Three |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ArizonaAssetThreeMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 10,500us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ArizonaAssetThreeMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Arizona Asset Four |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ArizonaAssetFourMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 4,300us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ArizonaAssetFourMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Texas Asset Nine |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetNineMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 9,700us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetNineMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Texas Asset Ten |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetTenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 10,497us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetTenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Texas Asset Eleven |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetElevenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 6,925us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetElevenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Florida Asset Nine |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetNineMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Purchase / Sales Price |  | 6,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetNineMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember |
Acquisitions | Texas Asset Twelve |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetTwelveMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 5,100us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetTwelveMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Georgia Asset One |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_GeorgiaAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 6,900us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_GeorgiaAssetOneMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Texas Asset Thirteen |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetThirteenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 4,970us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetThirteenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Texas Assets Fourteen |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 4cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetsFourteenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 18,150us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetsFourteenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Texas Asset Fifteen |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetFifteenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 5,130us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetFifteenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Storage Deluxe assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 6cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_StorageDeluxeAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 201,910us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_StorageDeluxeAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Connecticut Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ConnecticutAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 5,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ConnecticutAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Virginia Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_VirginiaAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 19,750us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_VirginiaAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | New Jersey Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 2cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_NewJerseyAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 10,750us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_NewJerseyAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Georgia/Florida Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 3cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_GeorgiaFloridaAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 13,370us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_GeorgiaFloridaAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Georgia Asset Two |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_GeorgiaAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 3,100us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_GeorgiaAssetTwoMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | HSREV Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 9cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_HSREVAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 102,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_HSREVAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Colorado Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ColoradoAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 10,600us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_ColoradoAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Florida Assets Ten |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 2cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetsTenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 13,010us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAssetsTenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Pennsylvania/New Jersey Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 2cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_PennsylvaniaNewJerseyAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 7,800us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_PennsylvaniaNewJerseyAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Acquisitions | Texas Asset Sixteen |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, acquisitions (in properties) |  |  | 1cube_NumberOfRealEstatePropertiesAcquired / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetSixteenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Purchase / Sales Price |  |  | 4,800us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAssetSixteenMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Dispositions |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) |  | 35cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember | 26cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Purchase / Sales Price |  | 126,400us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember | 59,962us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Dispositions | California Asset |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) |  |  | 1cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_CaliforniaAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Purchase / Sales Price |  |  | 5,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_CaliforniaAssetMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Dispositions | Texas/Indiana Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) |  | 5cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAndIndianaAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember |
Purchase / Sales Price |  | 11,400us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TexasAndIndianaAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember |
Dispositions | Tennessee Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) |  | 8cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TennesseeAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember |
Purchase / Sales Price |  | 25,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_TennesseeAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember |
Dispositions | California/Tennessee/Texas Assets/Wisconsin Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) |  | 22cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_CaliforniaTennesseeTexasAssetsWisconsinAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember |
Purchase / Sales Price |  | 90,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_CaliforniaTennesseeTexasAssetsWisconsinAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember |
Dispositions | Michigan Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) |  |  | 3cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MichiganAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Purchase / Sales Price |  |  | 6,362us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_MichiganAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Dispositions | Alabama/Louisiana/Mississippi Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) |  |  | 5cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_AlabamaLouisianaMississippiAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Purchase / Sales Price |  |  | 16,800us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_AlabamaLouisianaMississippiAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Dispositions | New Mexico Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) |  |  | 6cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_NewMexicoAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Purchase / Sales Price |  |  | 7,500us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_NewMexicoAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Dispositions | Florida/ Tennessee Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) |  |  | 3cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAndTennesseeAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Purchase / Sales Price |  |  | 6,550us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_FloridaAndTennesseeAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Dispositions | Ohio Assets |  |  |
STORAGE FACILITIES |  |  |
Number of Facilities, dispositions (in properties) |  |  | 8cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_OhioAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember
Purchase / Sales Price |  |  | $ 17,750us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / cube_ScheduleOfRealEstateInvestmentPropertyAxis = cube_OhioAssetsMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = cube_DispositionsMember

X
- Definition Represents the number of real estate properties sold attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References No definition available. + Details
Name: | cube_DisposalGroupIncludingDiscontinuedOperationsNumberOfRealEstatePropertiesSold
Namespace Prefix: | cube_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of real estate properties that were acquired. + References No definition available. + Details
Name: | cube_NumberOfRealEstatePropertiesAcquired
Namespace Prefix: | cube_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The value of all consideration given or received by the Entity in the significant acquisition or disposal. + References No definition available. + Details
Name: | us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_SignificantAcquisitionsAndDisposalsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis=cube_DispositionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis=us-gaap_SeriesOfIndividuallyImmaterialBusinessAcquisitionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |