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Derivatives (Details) (Foreign currency forward contracts [Member], USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Accrued expenses [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Instruments and Hedges, Liabilities   $ 337us-gaap_DerivativeInstrumentsAndHedgesLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccountsPayableAndAccruedLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember
Prepaid expenses and other current assets [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Instruments and Hedges, Liabilities $ 169us-gaap_DerivativeInstrumentsAndHedgesLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember
$ 0us-gaap_DerivativeInstrumentsAndHedgesLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember