Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Apr. 01, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Raw materials	$ 21,119	$ 19,123
Contracts and other work in process (including certain general stock materials)	151,927	138,737
Finished goods	36,481	35,240
Inventories	$ 209,527	$ 193,100

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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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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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