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Postretirement Benefit Plans - Schedule of Amounts Recognized in Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Defined Benefit Postretirement Health And Life Coverage |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net (gain) loss, pretax | $ (51) | $ (65)
Net prior service cost, pretax | 0 | 0
Director's Retirement Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net (gain) loss, pretax | 0 | 0
Net prior service cost, pretax | 0 | 0
Scottdale Defined Benefit Pension Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net (gain) loss, pretax | (813) | (798)
Riverview Defined Benefit Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net (gain) loss, pretax | $ (153) | $ (415)

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