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Employee Postretirement Benefits - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Net Periodic Benefit Cost $ (6,600) $ (7,487) $ 5,913
Pension Benefits (Pension Plan)      
Defined Benefit Plan Disclosure [Line Items]      
Service Cost 3,886 3,698 6,576
Interest Cost 17,189 16,436 12,344
Expected Return on Assets (25,518) (25,914) (23,684)
Amortization of Prior Service Cost 0 0 0
Amortization of Net Actuarial Loss 158 0 7,865
Net Periodic Benefit Cost (4,285) (5,780) 3,101
Pension Benefits (ESSRP)      
Defined Benefit Plan Disclosure [Line Items]      
Service Cost 0 72 195
Interest Cost 1,897 1,889 1,341
Expected Return on Assets 0 0 0
Amortization of Prior Service Cost 0 0 0
Amortization of Net Actuarial Loss 0 0 567
Net Periodic Benefit Cost 1,897 1,961 2,103
Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Service Cost 490 565 1,338
Interest Cost 1,600 2,416 2,041
Expected Return on Assets 0 0 0
Amortization of Prior Service Cost (6,302) (6,649) (5,733)
Amortization of Net Actuarial Loss 0 0 3,063
Net Periodic Benefit Cost $ (4,212) $ (3,668) $ 709