Fair Value of Financial Instruments - Deferred Compensation Plan, Commodity Hedging Agreements (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2014	Dec. 29, 2013	Sep. 29, 2013
Liabilities
Acquisition related contingent consideration	$ 13,000
Level 1 [Member]
Assets
Deferred compensation plan assets	18,015	17,098	15,875
Liabilities
Deferred compensation plan liabilities	18,015	17,098	15,875
Level 2 [Member] | Commodity Hedging Agreements [Member]
Assets
Commodity hedging agreements	552	0	0
Level 3 [Member]
Liabilities
Acquisition related contingent consideration	$ 13,000	$ 0	$ 0