Fair Value of Financial Instruments - Deferred Compensation Plan, Commodity Hedging Agreements and Acquisition Related Contingent Consideration (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 29, 2015	Dec. 28, 2014	Mar. 30, 2014	Dec. 29, 2013
Assets
Commodity hedging agreements	$ 1,800
Liabilities
Acquisition related contingent consideration	98,505	46,850	0	0
Level 1 [Member]
Assets
Deferred compensation plan assets	19,720	18,580	17,453
Liabilities
Deferred compensation plan liabilities	19,720	18,580	17,453
Level 2 [Member] | Commodity Hedging Agreements [Member]
Assets
Commodity hedging agreements	643	0	781
Level 3 [Member]
Liabilities
Acquisition related contingent consideration	$ 98,505	$ 46,850	$ 0