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21. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Accumulated Other Comprehensive Income Loss Details    
Cumulative foreign currency translation $ (48,454) $ (61,371)
Gross unamortized experience gain – post employment liability 786 786
Tax effect unamortized experience gain – post employment liability (208) (208)
Gross unrealized gains on investments 11 7
Accumulated other comprehensive loss $ (47,865) $ (60,786)