Derivative Financial Instruments - Summary of Pre-Tax Changes in Fair Value (Detail) - Commodity hedges - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss)	$ 2,071	$ (4,940)	$ (1,794)	$ 1,680
Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss)	1,266	(4,874)	(270)	(969)
Selling, delivery and administrative expenses
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss)	$ 805	$ (66)	$ (1,524)	$ 2,649