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EMPLOYEE BENEFIT PLANS (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Supplemental Employee Retirement Plan [Member]        
Net periodic pension cost        
Service cost $ 133 $ 126 $ 400 $ 378
Interest cost 115 97 345 292
Recognized net actuarial loss 214 194 645 583
Net period benefit cost 462 417 1,390 1,253
Other Postretirement Benefit Plan        
Net periodic pension cost        
Service cost 5 7 15 20
Interest cost 28 26 84 77
Recognized net actuarial loss 22 29 66 87
Amortization of prior service credit (6) (6) (18) (18)
Net period benefit cost $ 49 $ 56 $ 147 $ 166