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Derivative Instruments and Hedging Activities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 29, 2012
Dec. 31, 2011
Oct. 01, 2011
Derivative contracts      
Assets $ 153 $ 546 $ 445
Liabilities (5) (138) (208)
Derivatives designated as hedging instruments:
     
Derivative contracts      
Assets 53 546 445
Liabilities (5) (138) (208)
Derivatives designated as hedging instruments: | Foreign currency forward contracts
     
Derivative contracts      
Notional Amounts   13,044 7,840
Assets   205  
Liabilities     (108)
Derivatives designated as hedging instruments: | Commodity futures contracts
     
Derivative contracts      
Notional Amounts 2,252 4,557 5,473
Assets 53 341 445
Liabilities (5) (138) (100)
Derivatives not designated as hedging instruments:
     
Derivative contracts      
Assets 100    
Derivatives not designated as hedging instruments: | Commodity futures contracts
     
Derivative contracts      
Notional Amounts 841    
Assets $ 100