PENSION PLAN, Plan's funded status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CHANGES IN BENEFIT OBLIGATIONS [Roll Forward]
Benefit obligation-beginning of year	$ 23,492	$ 22,916	$ 23,341
Service cost	28	29	28
Interest cost	755	840	888
Actuarial (gain) loss	(1,951)	721	(255)
Benefits paid	(1,219)	(1,014)	(1,086)
Benefit obligation at end of year	21,105	23,492	22,916
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-beginning of year	19,055	17,548	17,792
Actual return on plan assets	(1,000)	2,521	842
Benefits paid	(1,220)	(1,014)	(1,086)
Fair value of plan assets-end of year	16,835	19,055	17,548
BENEFIT OBLIGATION IN EXCESS OF FAIR VALUE FUNDED STATUS:	$ (4,270)	$ (4,437)	$ (5,368)