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INVENTORIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw material $ 92,468 $ 110,806
Work-in-process 53,218 55,543
Finished goods 206,185 229,386
Inventory, Gross $ 351,871 $ 395,735