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Pension and Postretirement Benefits - Composition of Net Periodic Pension Plan and Postretirement Plan Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Pension Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 0 $ 0
Interest cost 144 139
Expected return on plan assets (256) (253)
Amortization of prior service credits 0 0
Amortization of net losses 35 40
Net periodic benefit plan (benefit) cost (77) (74)
Postretirement Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 0 0
Interest cost 2 2
Expected return on plan assets 0 0
Amortization of prior service credits (1) (1)
Amortization of net losses (1) (1)
Net periodic benefit plan (benefit) cost $ 0 $ 0