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Benefit Plans - (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Components of net periodic benefit cost    
Service cost $ 87 $ 81
Interest cost $ 98 $ 81
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Noninterest Income, Other Operating Income Noninterest Income, Other Operating Income
Expected return on assets $ 178 $ 156
Amortization of prior service cost and net loss (22) (22)
Pension (contra expense) expense $ (15) $ (16)