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Derivatives (Details) (USD $)
Sep. 28, 2012
Dec. 30, 2011
Derivatives, Fair Value [Line Items]    
UnrealizedGainOnDerivatives $ 132,000 $ 218,000
Unrealized Loss on Derivatives (170,000) (120,000)
Notional Amount Of Foreign Currency Contracts 26,000,000  
Foreign Exchange Contract [Member] | Other Current Liabilities [Member]
   
Derivatives, Fair Value [Line Items]    
Net losses on derivative contracts (38,000)  
Foreign Exchange Contract [Member] | Accounts Receivable [Member]
   
Derivatives, Fair Value [Line Items]    
Net gains on derivative contracts   $ 98,000