XML 102 R69.htm IDEA: XBRL DOCUMENT v2.4.1.9
EARNINGS PER SHARE AND UNIT AND SHAREHOLDERS' EQUITY AND CAPITAL (Details 2) (USD $)
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Oct. 20, 2014
Issuance of Common and Preferred Shares        
Net proceeds from sale of common shares $ 416,001,000us-gaap_StockIssuedDuringPeriodValueNewIssues $ 100,287,000us-gaap_StockIssuedDuringPeriodValueNewIssues $ 102,079,000us-gaap_StockIssuedDuringPeriodValueNewIssues  
Series A Preferred shares, shares outstanding 3,100,000us-gaap_PreferredStockSharesOutstanding 3,100,000us-gaap_PreferredStockSharesOutstanding    
Series A Preferred shares, percentage 7.75%us-gaap_PreferredStockDividendRatePercentage 7.75%us-gaap_PreferredStockDividendRatePercentage    
Liquidation preference 77,500,000us-gaap_PreferredStockLiquidationPreferenceValue 77,500,000us-gaap_PreferredStockLiquidationPreferenceValue    
Liquidation preference (per share) $ 25.00us-gaap_PreferredStockLiquidationPreference $ 25.00us-gaap_PreferredStockLiquidationPreference    
Common Shares        
Issuance of Common and Preferred Shares        
Number of common stock sold (in shares)       7,475,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
Average sales price per common share (in dollars per share)       $ 19.33cube_SaleOfCommonStockPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
Number of shares of common stock purchased by underwriters to cover overallotment       975,000cube_StockIssuedDuringPeriodSharesNewIssuesOverAllotment
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
Net proceeds from sale of common shares       143,000,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
Common Shares | Equity Distribution Agreements        
Issuance of Common and Preferred Shares        
Number of common stock sold (in shares) 15,200,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_TypeOfArrangementAxis
= cube_EquityDistributionAgreementsMember		 5,700,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_TypeOfArrangementAxis
= cube_EquityDistributionAgreementsMember		    
Average sales price per common share (in dollars per share) $ 18.22cube_SaleOfCommonStockPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_TypeOfArrangementAxis
= cube_EquityDistributionAgreementsMember		 $ 17.92cube_SaleOfCommonStockPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_TypeOfArrangementAxis
= cube_EquityDistributionAgreementsMember		    
Gross Proceeds from sale of common shares $ 273,000,000cube_StockIssuedDuringPeriodValueNewIssuesGross
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_TypeOfArrangementAxis
= cube_EquityDistributionAgreementsMember		 $ 100,300,000cube_StockIssuedDuringPeriodValueNewIssuesGross
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_TypeOfArrangementAxis
= cube_EquityDistributionAgreementsMember		    
Common shares remained available for issuance 9,200,000cube_StockRemainedAvailableForIssuance
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_TypeOfArrangementAxis
= cube_EquityDistributionAgreementsMember		      
Common Shares | Equity Distribution Agreements | Maximum        
Issuance of Common and Preferred Shares        
Number of shares that may be sold 30,000,000cube_NumberOfSharesThatCanBeSoldUnderSaleAgreement
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
/ us-gaap_TypeOfArrangementAxis
= cube_EquityDistributionAgreementsMember