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INVENTORIES (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Inventory Disclosure [Abstract]      
Raw materials $ 10,268   $ 12,011
Work in progress 730   576
Finished products 35,042   41,577
Inventories, Net 46,040   $ 54,164
Inventory write-off $ 1,106 $ 2,912