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Inventories (Details) - USD ($)
$ in Thousands
Mar. 28, 2020
Dec. 28, 2019
Inventory Disclosure [Abstract]    
Raw materials and work-in-process $ 231,723 $ 259,658
Finished goods 54,560 75,112
Inventory reserves (13,808) (11,224)
Total Inventory, Net $ 272,475 $ 323,546