Derivative Financial Instruments - Summary of Pre-Tax Changes in Fair Value (Detail) - Commodity Contract [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Total gain	$ 3,401	$ 388	$ 2,541	$ 4,198
Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total gain	2,042	401	2,066	2,695
Selling, Delivery and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total gain	$ 1,359	$ (13)	$ 475	$ 1,503