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Fair Value of Financial Instruments - Debt, Deferred Compensation Assets, Deferred Compensation Liabilities and Commodity Hedging Agreements (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 29, 2013
Dec. 30, 2012
Fair Value [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Public debt securities $ (409,434) $ (426,050)
Deferred compensation plan assets 17,098 13,011
Deferred compensation plan liabilities (17,098) (13,011)
Non-public variable rate debt (25,000) (50,000)
Fair Value [Member] | Commodity Hedging Agreements [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Commodity hedging agreements 0 500
Carrying Amount [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Public debt securities (373,566) (373,386)
Deferred compensation plan assets 17,098 13,011
Deferred compensation plan liabilities (17,098) (13,011)
Non-public variable rate debt (25,000) (50,000)
Carrying Amount [Member] | Commodity Hedging Agreements [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Commodity hedging agreements $ 0 $ 500