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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Advertising and Marketing Costs |  |  |
Advertising and marketing expenses | $ 7.7us-gaap_MarketingAndAdvertisingExpense | $ 7.6us-gaap_MarketingAndAdvertisingExpense | $ 8.1us-gaap_MarketingAndAdvertisingExpense
Equity Offering Costs |  |  |
Equity offering costs | 6.0cube_EquityOfferingCosts | 1.8cube_EquityOfferingCosts | 1.7cube_EquityOfferingCosts
Capitalized Interest |  |  |
Interest costs, capitalized | $ 1.3us-gaap_InterestCostsCapitalized | $ 0.9us-gaap_InterestCostsCapitalized | $ 0.2us-gaap_InterestCostsCapitalized

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- Definition Represents equity offering costs related to the issuance of common and preferred shares during the reporting period. + References No definition available. + Details
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- Definition Amount of interest capitalized during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Allowance for Funds Used during Construction -URI http://asc.fasb.org/extlink&oid=6504829 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
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- Definition The total expense recognized in the period for promotion, public relations, and brand or product advertising. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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