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Fair Value Measurements (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value adjustment to assets $ 0us-gaap_AssetsFairValueAdjustment $ 0us-gaap_AssetsFairValueAdjustment
Fair value adjustment to liabilities 0us-gaap_LiabilitiesFairValueAdjustment 0us-gaap_LiabilitiesFairValueAdjustment
Secured Debt | Carrying Value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Term loan facility $ 150,000,000us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_CarryingReportedAmountFairValueDisclosureMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember