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Fair Value Measurement, Financial Instruments And Risk Management (Summary Of Activity Associated With Cash Flow Hedges Reflected In AOCI) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Fair Value Disclosures [Abstract]    
Beginning balance, net of tax $ 0us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax $ 21us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
Changes in fair value gain, net of tax 0us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments 0us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments
Reclass to earnings, net of tax 0us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet (21)us-gaap_GainLossOnCashFlowHedgeIneffectivenessNet
Ending balance, net of tax $ 0us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax $ 0us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax