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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 30, 2022
Inventory, Net [Abstract]    
Finished products and components $ 245,480 $ 222,326
Products and components in various stages of completion 138,264 138,957
Raw materials and purchased components 227,972 248,636
Inventory gross 611,716 609,919
Reduction to LIFO cost (132,621) (133,129)
Total $ 479,095 $ 476,790