BENEFIT PLANS - Schedule of changes in projected benefit obligations, fair value of plan assets and funded status (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
SERP and DRP
Change in benefit obligation:
Projected benefit obligation at beginning of year	$ 2,814	$ 3,941
Service cost	100	98
Interest cost	141	87
Actuarial (gain) loss	126	(469)
Benefits paid	(278)	(339)
Plan amendments	0	(504)
Projected benefit obligation at end of year	2,903	2,814
Reconciliation of plan assets:
Employer contributions	278	341
Benefits and Settlements paid	(278)	(341)
Unfunded status	2,903	2,814
Post Retirement
Change in benefit obligation:
Projected benefit obligation at beginning of year	1,072	1,613
Service cost	0	1
Interest cost	51	39
Actuarial (gain) loss	4	(488)
Benefits paid	(80)	(93)
Plan amendments	0	0
Projected benefit obligation at end of year	1,047	1,072
Reconciliation of plan assets:
Employer contributions	80	93
Benefits and Settlements paid	(80)	(93)
Unfunded status	$ 1,047	$ 1,072