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Fair Value of Financial Instruments - Deferred Compensation Plan, Commodity Hedging Agreements (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 30, 2012 | Jul. 01, 2012
--- | --- | --- | ---
Level 1 [Member] |  |  |
Assets |  |  |
Deferred compensation plan assets | $ 14,801 | $ 13,011 | $ 12,164
Liabilities |  |  |
Deferred compensation plan liabilities | 14,801 | 13,011 | 12,164
Level 2 [Member] | Commodity Hedging Agreements [Member] |  |  |
Assets |  |  |
Commodity hedging agreements | $ 0 | $ 500 | $ 0

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