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Inventories (Details) - USD ($)
$ in Thousands
Mar. 28, 2020
Dec. 28, 2019
Inventory Disclosure [Abstract]    
Inventory, Raw Materials, Net of Reserves $ 289,616 $ 277,394
Inventory, Work in Process, Net of Reserves 62,906 58,663
Inventory, Finished Goods, Net of Reserves 271,300 249,642
Inventories, net $ 623,822 $ 585,699