v3.25.0.1
EMPLOYEE BENEFIT PLANS (Assumptions Used) (Details)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Qualified Plan      
Weighted Average Assumptions Used to Determine Benefit Obligations      
Discount rate - benefit obligations 5.63% 4.99%  
Rate of compensation increase 4.55% 4.27%  
Discount rates:      
Effective rate for service cost 5.00% 5.22% 2.80%
Effective rate for interest cost 4.90% 5.14% 2.33%
Effective rate for interest on service cost 4.89% 5.14% 2.45%
Cash balance interest credit rate 3.99% 4.04% 2.06%
Expected long-term rate of return on plan assets 6.80% 6.75% 5.50%
Rate of compensation increase 4.55% 4.27% 4.26%
Supplemental Plan      
Weighted Average Assumptions Used to Determine Benefit Obligations      
Discount rate - benefit obligations 5.54% 4.94%  
Rate of compensation increase 5.00% 4.50%  
Discount rates:      
Effective rate for service cost 4.94% 5.24% 2.73%
Effective rate for interest cost 4.90% 5.14% 2.24%
Effective rate for interest on service cost 4.84% 5.12% 2.29%
Cash balance interest credit rate 3.99% 4.04% 2.06%
Rate of compensation increase 4.50% 4.50% 4.50%
Post-Retirement Medical Plan      
Weighted Average Assumptions Used to Determine Benefit Obligations      
Discount rate - benefit obligations 5.39% 4.88%  
Rate of compensation increase 0.00% 0.00%  
Discount rates:      
Effective rate for service cost 5.00% 5.27% 2.80%
Effective rate for interest cost 4.82% 5.05% 1.91%
Effective rate for interest on service cost 4.93% 5.21% 2.65%