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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended
	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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Represents equity offering costs related to the issuance of common and preferred shares during the reporting period.

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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

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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

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