Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Sep. 27, 2020	Dec. 29, 2019
Inventory Disclosure [Abstract]
Finished products	$ 125,388	$ 142,363
Manufacturing materials	45,425	45,267
Plastic shells, plastic pallets and other inventories	36,960	38,296
Total inventories	$ 207,773	$ 225,926

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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Amount, after of valuation reserves and allowances, of inventory, classified as other, expected to be sold, or consumed within one year or operating cycle, if longer.

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