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Inventories Inventories (Details) - USD ($)
$ in Thousands
Mar. 30, 2019
Dec. 29, 2018
Inventory Disclosure [Abstract]    
Inventory, Raw Materials, Net of Reserves $ 269,346 $ 245,976
Inventory, Work in Process, Net of Reserves 59,818 51,164
Inventory, Finished Goods, Net of Reserves 251,010 224,670
Inventories, net $ 580,174 $ 521,810