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OTHER INCOME, NET (Schedule of Components of Other Income, Net) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
OTHER INCOME, NET |  |  |
Foreign exchange gains (loss) | $ 619 | $ 1,459 | $ (190)
Gain from the currency translation adjustment | 1,703 | 38 |
Tax reversal for expiration of the statute of limitations |  | 807 |
ESA loan impairment |  |  | 2,788
ESA loan interest |  |  | 1,129
Realized investment gain |  | 83 | 1,529
UiTV loan impairment |  |  | (2,250)
Other | 654 | 361 | 483
Total | $ 2,976 | $ 2,748 | $ 3,489

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