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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