Inventories - Major Classes of Inventories (Details) - USD ($) $ in Thousands	Oct. 03, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 142,000	$ 106,514
Work-in-process	38,046	32,011
Finished goods	170,427	141,042
Gross inventories	350,473	279,567
Excess and obsolete reserves	(38,385)	(32,269)
Net inventories	$ 312,088	$ 247,298

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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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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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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 of valuation reserve for inventory.

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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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