PENSION AND OTHER POSTRETIREMENT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Change in benefit obligation:
Beginning benefit obligation	$ 2,298	$ 2,710
Interest cost	53	52	$ 75
Actuarial (gain) loss	(611)	(153)
Benefits paid	(194)	(311)
Ending benefit obligation	1,546	2,298	2,710
Change in plan assets (primarily equity and fixed income investments and money market funds), at fair value:
Beginning plan assets	2,303	2,349
Actual return	(289)	265
Employer contribution	0	0
Benefits paid	(194)	(311)
Ending plan assets	1,820	2,303	2,349
Funded status at end of year	274	5
SERP Benefits
Change in benefit obligation:
Beginning benefit obligation	867	968
Interest cost	20	18	27
Actuarial (gain) loss	(52)	13
Benefits paid	(135)	(132)
Ending benefit obligation	700	867	968
Change in plan assets (primarily equity and fixed income investments and money market funds), at fair value:
Beginning plan assets	848	879
Actual return	(107)	101
Employer contribution	0	0
Benefits paid	(135)	(132)
Ending plan assets	606	848	$ 879
Funded status at end of year	$ (94)	$ (19)