v3.26.1
EMPLOYEE BENEFIT PLANS - Postretirement Benefits Other than Pensions - Obligations (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
USD ($)
plan
Medical Benefit Plans  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]  
Total postretirement and postemployment medical obligations at end of period $ 395
Postretirement Medical Benefit Plans  
Defined Contribution Plan Disclosure [Line Items]  
Threshold of unrecognized amount of actuarial gains and losses as a proportion of projected benefit obligation (as a percent) 10.00%
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]  
Postretirement medical benefit obligation at beginning of period $ 347
Interest cost 6
Benefit payments (net of contributions by participants) (57)
Total postretirement and postemployment medical obligations at end of period 296
Postemployment Medical Benefit Plans  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]  
Total postretirement and postemployment medical obligations at end of period $ 99
Executive Benefit Restoration Plan  
Defined Contribution Plan Disclosure [Line Items]  
Threshold of unrecognized amount of actuarial gains and losses as a proportion of projected benefit obligation (as a percent) 10.00%
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]  
Postretirement medical benefit obligation at beginning of period $ 8,534
Interest cost 106
Total postretirement and postemployment medical obligations at end of period $ 8,765
Non-bargaining unit employees | Medical Benefit Plans  
Defined Contribution Plan Disclosure [Line Items]  
Number of plans | plan 3
Non-bargaining unit employees | Medical Benefit Plans | Maximum  
Defined Contribution Plan Disclosure [Line Items]  
Qualifying age 65 years
Non-bargaining unit employees | Postretirement Medical Benefit Plans  
Defined Contribution Plan Disclosure [Line Items]  
Number of plans | plan 2
Non-bargaining unit employees | Postretirement Medical Benefit Plans | Minimum  
Defined Contribution Plan Disclosure [Line Items]  
Qualifying age 55 years
Non-bargaining unit employees | Postemployment Medical Benefit Plans  
Defined Contribution Plan Disclosure [Line Items]  
Number of plans | plan 3