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Derivative Financial Instruments - Summary of Pre-Tax Changes in Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2013
Sep. 30, 2012
Sep. 29, 2013
Sep. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]        
Total $ 0 $ 1,037 $ (500) $ 1,037
Commodity Hedging Agreements [Member] | Cost of Sales [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Total $ 0 $ 1,037 $ (500) $ 1,037