COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Qualified Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost, benefits earned during the period	$ 0	$ 0	$ 0	$ 0
Interest cost on projected benefit obligation	397	284	793	566
Expected return on plan assets	(594)	(708)	(1,190)	(1,421)
Amortization of unrecognized transition obligation	0	0	0	0
Amortization of unrecognized prior service cost	0	0	0	0
Amortization of unrecognized net loss	5	0	11	0
Net periodic pension benefit	(192)	(424)	(386)	(855)
Supplemental Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost, benefits earned during the period	0	0	0	0
Interest cost on projected benefit obligation	11	9	23	17
Expected return on plan assets	0	0	0	0
Amortization of unrecognized prior service cost	0	0	0	0
Amortization of unrecognized net loss	2	4	4	9
Net periodic pension benefit	13	13	27	26
Postretirement Plan, Medical and Life
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost, benefits earned during the period	0	0	0	0
Interest cost on projected benefit obligation	1	1	2	2
Expected return on plan assets	0	0	0	0
Amortization of unrecognized prior service cost	0	0	0	0
Amortization of unrecognized net loss	4	7	9	16
Net periodic pension benefit	$ 5	$ 8	$ 11	$ 18