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INVENTORIES (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Inventory Disclosure [Abstract] |  |  |
Raw materials | $ 15,065 | $ 12,011 |
Work in progress | 374 | 576 |
Finished products | 38,070 | 41,577 |
Inventories, Net | 53,509 | 54,164 |
Inventory write-off | 2,814 | $ 3,932 | $ 4,503
Outstanding inventory purchase orders | $ 23,922 |  |

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