Inventories - Components of Inventories (Details) - USD ($) $ in Thousands	Jan. 01, 2022	Dec. 26, 2020
Inventory, Net
Raw materials	$ 168,409	$ 85,394
Work in process	117,506	92,783
Finished goods	195,656	114,641
Inventory reserves	(35,900)	(34,816)
Inventories	$ 445,671	$ 258,002

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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