Derivative Financial Instruments - Summary of Fair Values and Classification in Condensed Consolidated Balance Sheets of Derivative Instruments (Detail) - USD ($) $ in Thousands	Jun. 28, 2020	Dec. 29, 2019
Assets:
Total assets	$ 823	$ 1,007
Liabilities:
Total liabilities	2,918	1,174
Gross derivative assets	904	3,298
Gross derivative liabilities	2,999	3,465
Commodity hedges at fair market value | Prepaid expenses and other current assets
Assets:
Total assets	823	1,007
Commodity hedges at fair market value | Other accrued liabilities
Liabilities:
Total liabilities	$ 2,918	$ 1,174