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Derivatives and Risk Management (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Derivatives    
Total gain recognized in other comprehensive income (loss), net of taxes $ (1,800)  
Foreign exchange forward contracts
   
Derivatives    
Total gain recognized in other comprehensive income (loss), net of taxes $ 426 $ 280