Derivative Financial Instruments - Summary of Pre-Tax Changes in Fair Value (Detail) - Commodity Contract [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2016	Jun. 28, 2015	Jul. 03, 2016	Jun. 28, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Total	$ 2,770	$ (749)	$ 3,810	$ (106)
Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	1,452	(893)	2,294	(681)
Selling, Delivery and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	$ 1,318	$ 144	$ 1,516	$ 575