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Postretirement Benefit Plans - Amounts Recognized in Balance Sheet (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Postretirement Health And Life Coverage    
Defined Benefit Plan Disclosure [Line Items]    
Accrued benefit liability $ 226 $ 271
Director's Retirement Plan    
Defined Benefit Plan Disclosure [Line Items]    
Accrued benefit liability 0 1,306
Scottdale Defined Benefit Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Accrued pension benefit asset 1,050 809
Riverview Defined Benefit Plan    
Defined Benefit Plan Disclosure [Line Items]    
Accrued pension benefit asset $ 971 $ 453