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Inventories, Net (Details) - USD ($)
$ in Thousands
Mar. 29, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 183,023 $ 165,738
Work in process 103,919 88,860
Finished goods 501,812 283,067
Inventory, gross 788,754 537,665
Less: allowance for excess, slow-moving and obsolete inventory (49,219) (41,130)
Inventories, net $ 739,535 $ 496,535