PENSION AND OTHER POSTRETIREMENT PLANS (Components of net periodic benefit cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Change in benefit obligation:
Beginning benefit obligation	$ 2,710	$ 2,715
Interest cost	52	75	$ 87
Actuarial (gain) loss	(153)	276
Benefits paid	(311)	(356)
Ending benefit obligation	2,298	2,710	2,715
Change in plan assets (primarily equity and fixed income investments and money market funds), at fair value:
Beginning plan assets	2,349	2,472
Actual return	265	233
Employer contribution	0	0
Benefits paid	(311)	(356)
Ending plan assets	2,303	2,349	2,472
Funded status at end of year	5	(361)
SERP Benefits
Change in benefit obligation:
Beginning benefit obligation	968	991
Interest cost	18	27	37
Actuarial (gain) loss	13	84
Benefits paid	(132)	(134)
Ending benefit obligation	867	968	991
Change in plan assets (primarily equity and fixed income investments and money market funds), at fair value:
Beginning plan assets	879	914
Actual return	101	99
Employer contribution	0	0
Benefits paid	(132)	(134)
Ending plan assets	848	879	$ 914
Funded status at end of year	$ (19)	$ (89)