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Inventories (Details) - USD ($)
$ in Thousands
Jul. 24, 2021
Apr. 24, 2021
Inventory Disclosure [Abstract]    
Raw materials $ 141,508 $ 112,371
Work in process 30,720 24,791
Finished goods 130,269 121,182
FIFO inventories 302,497 258,344
Excess of FIFO over LIFO (38,043) (32,207)
Total inventories $ 264,454 $ 226,137