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EMPLOYEE RETIREMENT PLANS - Schedule of net periodic pension cost (Details)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Employee Retirement Plans    
Long-term rate of return on plan assets 6.75% 6.75%
Defined Benefit Pension Plan    
Employee Retirement Plans    
Discount rate for projected benefit obligation 5.15% 5.41%
Discount rate for determining interest cost 5.08% 5.35%
Long-term rate of return on plan assets 6.75% 6.75%
Supplemental Pension Plan    
Employee Retirement Plans    
Discount rate for projected benefit obligation 5.16% 5.44%
Discount rate for determining interest cost 5.08% 5.37%