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EMPLOYEE BENEFIT PLANS - Other Changes Recognized in Comprehensive Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Retirement Benefits [Abstract]    
Net periodic cost $ 21 $ 40
Current year actuarial (gain) loss (18) (9)
Amortization of transition obligation (4) (4)
Total recognized in other comprehensive income (loss) (22) (13)
Total recognized in comprehensive income $ (1) $ 27