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INCOME TAXES (Schedule of Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Beginning balance $ 8,969 $ 13,538 $ 24,961
Reduction in tax positions of current year     (623)
Additions for tax positions of current year 8,753 157  
Reduction of prior years' provision (2,436)    
Expiration of prior years provision due to TJP closure   (6,472)  
Additions for tax positions of prior years   779  
Reduction due to statute of limitation of prior years     (10,758)
Decrease from translation differences     (42)
Translation differences   967  
Ending balance $ 15,286 $ 8,969 $ 13,538