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COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
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 282 271 848 813
Expected return on plan assets (720) (673) (2,141) (2,019)
Amortization of unrecognized transition obligation 0 0 0 0
Amortization of unrecognized prior service cost 0 0 0 0
Amortization of unrecognized net loss 0 38 0 113
Net periodic pension benefit (438) (364) (1,293) (1,093)
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 8 8 25 24
Expected return on plan assets 0 0 0 0
Amortization of unrecognized prior service cost 0 0 0 0
Amortization of unrecognized net loss 6 5 13 15
Net periodic pension benefit 14 13 38 39
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 3 5
Expected return on plan assets 0 0 0 0
Amortization of unrecognized prior service cost 0 (55) 0 (165)
Amortization of unrecognized net loss 10 14 28 41
Net periodic pension benefit $ 11 $ (40) $ 31 $ (119)