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INVENTORIES (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Raw materials $ 58,725 $ 60,217
Work-in-process 6,943 7,186
Finished goods 79,277 74,669
Inventories, net $ 144,945 $ 142,072