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STORAGE FACILITIES (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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STORAGE FACILITIES |  |
Storage facilities | $ 3,117,198us-gaap_RealEstateInvestmentPropertyAtCost | $ 2,553,706us-gaap_RealEstateInvestmentPropertyAtCost
Less: Accumulated depreciation | (492,069)us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation | (398,536)us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation
Storage facilities, net (including VIE assets of $49,829 and $34,559 respectively) | 2,625,129us-gaap_RealEstateInvestmentPropertyNet | 2,155,170us-gaap_RealEstateInvestmentPropertyNet
Land |  |
STORAGE FACILITIES |  |
Storage facilities | 545,393us-gaap_RealEstateInvestmentPropertyAtCost / cube_ScheduleOfRealEstateInvestmentPropertyAxis = us-gaap_LandMember | 465,680us-gaap_RealEstateInvestmentPropertyAtCost / cube_ScheduleOfRealEstateInvestmentPropertyAxis = us-gaap_LandMember
Buildings and improvements |  |
STORAGE FACILITIES |  |
Storage facilities | 2,304,653us-gaap_RealEstateInvestmentPropertyAtCost / cube_ScheduleOfRealEstateInvestmentPropertyAxis = us-gaap_BuildingAndBuildingImprovementsMember | 1,888,823us-gaap_RealEstateInvestmentPropertyAtCost / cube_ScheduleOfRealEstateInvestmentPropertyAxis = us-gaap_BuildingAndBuildingImprovementsMember
Equipment |  |
STORAGE FACILITIES |  |
Storage facilities | 218,731us-gaap_RealEstateInvestmentPropertyAtCost / cube_ScheduleOfRealEstateInvestmentPropertyAxis = us-gaap_EquipmentMember | 158,000us-gaap_RealEstateInvestmentPropertyAtCost / cube_ScheduleOfRealEstateInvestmentPropertyAxis = us-gaap_EquipmentMember
Construction in progress |  |
STORAGE FACILITIES |  |
Storage facilities | $ 48,421us-gaap_RealEstateInvestmentPropertyAtCost / cube_ScheduleOfRealEstateInvestmentPropertyAxis = us-gaap_ConstructionInProgressMember | $ 41,203us-gaap_RealEstateInvestmentPropertyAtCost / cube_ScheduleOfRealEstateInvestmentPropertyAxis = us-gaap_ConstructionInProgressMember

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- Definition The cumulative amount of depreciation for real estate property held for investment purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(3)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 7 + Details
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- Definition Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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