Fair Value of Financial Instruments - Derivative Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 30, 2012	Jul. 01, 2012
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Public debt securities, carrying value	$ (373,475)	$ (373,386)	$ (523,301)
Deferred compensation plan assets	14,801	13,011	12,164
Deferred compensation plan liabilities	(14,801)	(13,011)	(12,164)
Non-public variable rate debt	(75,000)	(50,000)	0
Carrying Amount [Member] | Commodity Hedging Agreements [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity hedging agreements, Fair Value	0	500	0
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Public debt securities, carrying value	(415,152)	(426,050)	(579,386)
Deferred compensation plan assets	14,801	13,011	12,164
Deferred compensation plan liabilities	(14,801)	(13,011)	(12,164)
Non-public variable rate debt	(75,000)	(50,000)	0
Fair Value [Member] | Commodity Hedging Agreements [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity hedging agreements, Fair Value	$ 0	$ 500	$ 0