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Derivative and Hedgiing Activities Derivatives and Hedging Activities Notional Amounts (Details) (Foreign Exchange Forward [Member], USD $)
In Thousands, unless otherwise specified
Apr. 03, 2015
Dec. 31, 2014
Long [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Asset, Notional Amount $ 12,728us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
/ us-gaap_PositionAxis
= us-gaap_LongMember
$ 16,903us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
/ us-gaap_PositionAxis
= us-gaap_LongMember
Long [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Asset, Notional Amount 6,585us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_PositionAxis
= us-gaap_LongMember
1,043us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_PositionAxis
= us-gaap_LongMember
Short [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Derivative Liability, Notional Amount $ 9,069us-gaap_DerivativeLiabilityNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_PositionAxis
= us-gaap_ShortMember
$ 4,925us-gaap_DerivativeLiabilityNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForeignExchangeForwardMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_PositionAxis
= us-gaap_ShortMember