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Retirement Plans - Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Net (gain) loss | $ (525) | $ (590) | $ (575)
Transition obligation | 184 | 244 | 305
Total | (341) | $ (346) | $ (270)
Postretirement Benefit Costs [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Net (gain) loss | (108) |  |
Transition obligation | 76 |  |
Total | $ (32) |  |

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