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Fair Value of Financial Instruments - Deferred Compensation Plan, Commodity Hedging Agreements (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 29, 2013
Dec. 30, 2012
Sep. 30, 2012
Level 1 [Member]
     
Assets      
Deferred compensation plan assets $ 15,875 $ 13,011 $ 12,854
Liabilities      
Deferred compensation plan liabilities 15,875 13,011 12,854
Level 2 [Member] | Commodity Hedging Agreements [Member]
     
Assets      
Commodity hedging agreements $ 0 $ 500 $ 1,037