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INCOME TAXES, UNRECOGNIZED TAX BENEFITS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Reconciliation of beginning and ending amount of unrecognized tax benefits [Roll Forward]    
Balance as of January 1 $ 715 $ 803
Additions for tax positions related to the current year 90 0
Additions for tax positions of prior years 54 0
Reductions of tax positions of prior years (126) (71)
Settlements 0 (17)
Balance as of December 31 $ 733 $ 715