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Fair Value Measurements - Summary of Foreign Currency Forward Contract (Detail) (Foreign Exchange Contract [Member], USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Derivatives Fair Value [Line Items]    
Notional value $ 33,954invest_DerivativeNotionalAmount $ 32,089invest_DerivativeNotionalAmount
Fair value of notional 33,903us-gaap_DerivativeAssetNotionalAmount 31,986us-gaap_DerivativeAssetNotionalAmount
Fair value of the asset 51us-gaap_DerivativeFairValueOfDerivativeNet 103us-gaap_DerivativeFairValueOfDerivativeNet
Accounts Receivable [Member]
    
Derivatives Fair Value [Line Items]    
Fair value of the asset 51us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_AccountsReceivableMember		  
Accounts Payable [Member]
    
Derivatives Fair Value [Line Items]    
Fair value of the asset   $ 103us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeContractMember
/ us-gaap_InformationByFinancialStatementLineItemAxis
= us-gaap_AccountsPayableMember