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Derivatives and Hedging - Notional Amounts (Details) (Non-designated hedges of foreign exchange risk, Foreign Exchange, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Notional Sold  
Derivative [Line Items]  
Notional Amount $ 19,463invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_PositionAxis
= us-gaap_ShortMember
Notional Purchased  
Derivative [Line Items]  
Notional Amount $ 31,827invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_PositionAxis
= us-gaap_LongMember