Inventories (Details) - USD ($) $ in Thousands	Oct. 23, 2021	Apr. 24, 2021
Inventory Disclosure [Abstract]
Raw materials	$ 159,079	$ 112,371
Work in process	34,665	24,791
Finished goods	133,471	121,182
FIFO inventories	327,215	258,344
Excess of FIFO over LIFO	(41,445)	(32,207)
Total inventories	$ 285,770	$ 226,137

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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 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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