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Employee Benefit Plans - Pension and other postretirement benefit plans, Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Jan. 01, 2011
Defined benefit plan disclosure, net periodic benefit cost [Line Items]    
Plan participant age 65 years  
Nonqualified Plan | Underfunded plan | Postretirement Health Coverage    
Defined benefit plan disclosure, net periodic benefit cost [Line Items]    
Plan participant age   55 years
Years of continuous service   10 years
Plan participant age, all other employees   60 years
Qualified plan | Minimum | Defined Benefit Plan, Equity Securities    
Defined benefit plan disclosure, net periodic benefit cost [Line Items]    
Targeted allocation percentages 30.00%  
Qualified plan | Minimum | Fixed Income Securities    
Defined benefit plan disclosure, net periodic benefit cost [Line Items]    
Targeted allocation percentages 60.00%  
Qualified plan | Maximum | Defined Benefit Plan, Equity Securities    
Defined benefit plan disclosure, net periodic benefit cost [Line Items]    
Targeted allocation percentages 40.00%  
Qualified plan | Maximum | Fixed Income Securities    
Defined benefit plan disclosure, net periodic benefit cost [Line Items]    
Targeted allocation percentages 70.00%  
Qualified plan | Underfunded plan | Pension Benefits    
Defined benefit plan disclosure, net periodic benefit cost [Line Items]    
Expected employer contributions in next fiscal year $ 0  
Qualified plan | Underfunded plan | Other Postretirement Benefits    
Defined benefit plan disclosure, net periodic benefit cost [Line Items]    
Expected employer contributions in next fiscal year $ 795  
Qualified plan | Unfunded plan | Pension Benefits    
Defined benefit plan disclosure, net periodic benefit cost [Line Items]    
Excess percentage of unrecognized pension actuarial gains and losses 10.00%  
Market-related value of assets, average of assets (in years) 5 years