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RETIREMENT PLANS - Net Periodic Pension Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Components of the plan's net periodic pension cost      
Settlement   $ 369 $ 1,725
Pension benefits      
Components of the plan's net periodic pension cost      
Service cost $ 80 90 151
Interest cost 3,190 3,323 2,373
Expected return on plan assets (2,982) (2,936) (3,814)
Amortization of actuarial (gain) loss (156) (43)  
Settlement     1,725
Net periodic pension cost 132 434 435
Postretirement benefits      
Components of the plan's net periodic pension cost      
Service cost 76 65 124
Interest cost 195 182 139
Amortization of actuarial (gain) loss (54) (113)  
Net periodic pension cost $ 217 $ 134 $ 263