Inventories Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 30, 2017
Inventory Disclosure [Abstract]
Inventory, Raw Materials, Net of Reserves	$ 215,056	$ 180,559
Inventory, Work in Process, Net of Reserves	57,092	38,917
Inventory, Finished Goods, Net of Reserves	221,519	205,163
Inventories, net	$ 493,667	$ 424,639