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Fair Value Measurement, Financial Instruments And Risk Management (Fair Values Of Derivative Instruments Included Within The Consolidated Balance Sheets) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 28, 2014
Dec. 29, 2013
Derivatives, Fair Value [Line Items]    
Asset Derivatives $ 374 $ 0
Liability Derivatives 298 18
Foreign currency forward exchange contracts
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives 374 0
Liability Derivatives 298 18
Derivatives not designated as hedging instruments:
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives 374 0
Liability Derivatives 298 18
Derivatives not designated as hedging instruments: | Foreign currency forward exchange contracts | Other current assets
   
Derivatives, Fair Value [Line Items]    
Asset Derivatives 374 0
Derivatives not designated as hedging instruments: | Foreign currency forward exchange contracts | Other current liabilities
   
Derivatives, Fair Value [Line Items]    
Liability Derivatives $ 298 $ 18