Fair Value of Financial Instruments - Debt, Deferred Compensation Plan Assets and Liabilities, Acquisition Related Contingent Consideration and Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 28, 2015	Mar. 30, 2015	Dec. 29, 2014	Dec. 28, 2014	Jun. 29, 2014	Mar. 31, 2014	Dec. 30, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity hedging agreements-assets	$ 1,800
Acquisition related contingent consideration	(94,068)	$ (98,505)	$ (46,850)		$ (13,000)	$ 0	$ 0
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Public debt securities	(273,860)			$ (373,759)	(373,661)
Non-public variable rate debt	(290,000)			(71,000)	(80,000)
Deferred compensation plan assets	20,466			18,580	17,990
Deferred compensation plan liabilities	(20,466)			(18,580)	(17,990)
Acquisition related contingent consideration	(94,068)			(46,850)	(13,000)
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Public debt securities	(297,700)			(404,400)	(405,600)
Non-public variable rate debt	(290,000)			(71,000)	(80,000)
Deferred compensation plan assets	20,466			18,580	17,990
Deferred compensation plan liabilities	(20,466)			(18,580)	(17,990)
Acquisition related contingent consideration	(94,068)			(46,850)	(13,000)
Commodity Hedging Agreements [Member] | Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity hedging agreements-assets	575			0	871
Commodity hedging agreements-liabilities	(681)			0	0
Commodity Hedging Agreements [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commodity hedging agreements-assets	575			0	871
Commodity hedging agreements-liabilities	$ (681)			$ 0	$ 0