PENSION PLANS - Financial information relating to pension plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
CHANGE IN BENEFIT OBLIGATION:
Net benefit obligation - beginning of period	$ 14,308	$ 14,224
Interest cost	694	665	$ 658
Actuarial (gain) loss	(888)	344
Gross benefits paid	(846)	(925)
Net benefit obligation - end of period	13,268	14,308	14,224
CHANGE IN PLAN ASSETS:
Fair value of plan assets - beginning of period	15,940	14,568
Employer contributions	400	400
Gross benefits paid	(846)	(925)
(Loss) return on plan assets	(2,877)	1,897
Fair value of plan assets - end of period	12,617	15,940	$ 14,568
(Under) over funded status at end of period	$ (651)	$ 1,632