Derivative Financial Instruments - Summary of Pre-Tax Changes in Fair Value (Detail) - Commodity derivative instruments - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss)	$ 1,769	$ 413	$ (25)	$ 2,093
Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss)	1,194	487	924	(482)
Selling, delivery and administrative expenses
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss)	$ 575	$ (74)	$ (949)	$ 2,575