Inventories (Components Of Inventory) (Details) - USD ($) $ in Thousands	Mar. 29, 2020	Dec. 31, 2019
Inventory, Net [Abstract]
Raw materials	$ 73,047	$ 65,315
Work in process	51,548	53,891
Finished goods	22,580	18,103
Inventories	$ 147,175	$ 137,309

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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