Fair Value of Financial Instruments - Debt, Deferred Compensation Assets, Deferred Compensation Liabilities and Commodity Hedging Agreements (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2014	Dec. 29, 2013	Jun. 30, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Acquisition related contingent consideration	$ (13,000)
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Public debt securities	(373,661)	(373,566)	(373,475)
Deferred compensation plan assets	17,990	17,098	14,801
Deferred compensation plan liabilities	(17,990)	(17,098)	(14,801)
Non-public variable rate debt	(80,000)	(25,000)	(75,000)
Acquisition related contingent consideration	(13,000)	0	0
Carrying Amount [Member] | Commodity Hedging Agreements [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity hedging agreements	871	0	0
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Public debt securities	(405,600)	(409,434)	(415,152)
Deferred compensation plan assets	17,990	17,098	14,801
Deferred compensation plan liabilities	(17,990)	(17,098)	(14,801)
Non-public variable rate debt	(80,000)	(25,000)	(75,000)
Acquisition related contingent consideration	(13,000)	0	0
Fair Value [Member] | Commodity Hedging Agreements [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity hedging agreements	$ 871	$ 0	$ 0