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PENSION PLAN (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Defined Benefit Plan [Abstract]        
Current service cost, net of employee contributions $ 14 $ 14 $ 29 $ 31
Interest cost on accrued benefit obligation 26 25 52 50
Expected return on plan assets (42) (42) (82) (85)
Amortization of transitional obligation 3 1 6 3
Amortization of past service costs 2 4 2
Amortization of net actuarial gain 11 14 24 28
Total cost of benefit $ 14 $ 12 $ 33 $ 29