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Inventories (Details) - USD ($)
$ in Thousands
Sep. 27, 2020
Mar. 29, 2020
Summary of Inventories    
Inventory (FIFO basis) $ 68,707 $ 60,090
LIFO reserve (5,513) (5,654)
Net inventory 63,194 54,436
LIFO Inventory Amount $ 44,600 $ 43,300