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Pension and Other Postretirement Benefit Plans - Amounts Recognized In AOCI on a Pre-tax Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Net Actuarial loss (gain) | $ 1,227 | $ 552 | $ 398
Total | 1,227 | 552 | 398
Retirement Plan [Member] |  |  |
Net Actuarial loss (gain) | 4,380 | 3,978 | 3,944
Total | 4,380 | 3,978 | 3,944
Other Postretirement Benefits Plan [Member] |  |  |
Net Actuarial loss (gain) | (2,074) | (2,268) | (2,512)
Total | (2,074) | (2,268) | (2,512)
Directors' Plan [Member] |  |  |
Net Actuarial loss (gain) | (1,079) | (1,158) | (1,034)
Total | $ (1,079) | $ (1,158) | $ (1,034)

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