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%