RETIREMENT PLANS - Amounts included in other comprehensive income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
SERP and DRP
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 201	$ 146
Interest cost	79	98
Amortization:
Past service liability	0	0
Net loss (gain)	213	190
Net periodic benefit cost	493	434
Post Retirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1
Interest cost	38	54
Amortization:
Past service liability	0	0
Net loss (gain)	(3)	(1)
Net periodic benefit cost	$ 36	$ 54