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Derivatives (Tables)
9 Months Ended
Sep. 28, 2012
Derivatives Tables [Abstract]  
Fair Market Value and Classification of Derivative Instruments
    Balance Sheet Sep 28, Dec 30,
    Classification 2012 2011
 Gain (loss) on foreign       
  currency forward contracts       
   Gains  $ 132 $ 218
   Losses    (170)   (120)
   NetOther current liabilities $ (38)   
    Accounts receivable    $ 98