Inventories, Net (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 33,877	$ 31,167
Work-in-process	15,653	13,305
Finished goods	61,826	59,271
Supplies and other	169	167
LIFO reserve	(21,817)	(18,511)
Inventories, net	$ 89,708	$ 85,399

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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 by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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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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Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer.

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