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Components of Net Periodic Benefit Cost - Employer Contributions (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Defined Benefit Plan Disclosure      
Amount of potential discretionary contributions accrued to a defined contribution plan $ 1,600 $ 1,600  
Pension plan      
Defined Benefit Plan Disclosure      
Expected future benefit payment     $ 570
Contributions by employer 357    
Pension plan | Employee Stock Option      
Defined Benefit Plan Disclosure      
Expected future benefit payment     563
Contributions by employer 0    
Postretirement Health Coverage      
Defined Benefit Plan Disclosure      
Expected future benefit payment     $ 243
Contributions by employer $ 134