RETIREMENT PLANS - Net Periodic Pension Cost (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Pension Plan
Earnings (cost) components:
Interest cost	$ (156)	$ (146)
Expected return on plan assets	276	376
Net amortization and deferral	(24)	(36)
Total net periodic pension earnings	96	194
SERP
Earnings (cost) components:
Interest cost	(92)	(82)
Net amortization and deferral	(58)	(62)
Total net periodic pension earnings	$ (150)	$ (144)