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INVENTORIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw materials $ 64,525 $ 58,725
Work-in-process 7,925 6,943
Finished goods 97,970 79,277
Inventories, net $ 170,420 $ 144,945