PENSION PLAN, Plan's funded status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CHANGES IN BENEFIT OBLIGATIONS [Roll Forward]
Benefit obligation-beginning of year	$ 22,832	$ 21,105
Service cost	35	33
Interest cost	654	812
Actuarial loss	2,115	2,103
Benefits paid	(1,278)	(1,221)
Benefit obligation at end of year	24,358	22,832
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-beginning of year	18,817	16,835
Actual return on plan assets	2,567	3,203
Benefits paid	(1,278)	(1,221)
Fair value of plan assets-end of year	20,106	18,817
BENEFIT OBLIGATION IN EXCESS OF FAIR VALUE FUNDED STATUS:	$ (4,252)	$ (4,015)
Discount rate	2.08%	2.93%