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Fair Value of Financial Instruments - Derivative Financial Instruments (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 29, 2013
Dec. 30, 2012
Sep. 30, 2012
Carrying Amount [Member]
     
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Public debt securities $ (373,520) $ (373,386) $ (523,344)
Deferred compensation plan assets 15,875 13,011 12,854
Deferred compensation plan liabilities (15,875) (13,011) (12,854)
Non-public variable rate debt (40,000) (50,000) 0
Carrying Amount [Member] | Commodity Hedging Agreements [Member]
     
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Commodity hedging agreements 0 500 1,037
Fair Value [Member]
     
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Public debt securities (411,197) (426,050) (577,775)
Deferred compensation plan assets 15,875 13,011 12,854
Deferred compensation plan liabilities (15,875) (13,011) (12,854)
Non-public variable rate debt (40,000) (50,000) 0
Fair Value [Member] | Commodity Hedging Agreements [Member]
     
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Commodity hedging agreements $ 0 $ 500 $ 1,037