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Retirement Plans - Components of Net Periodic Pension Expense (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Retirement Benefits [Abstract] |  |  |
Interest cost | $ 454 | $ 392 | $ 378
Expected return on plan assets | $ (605) | $ (732) | (574)
Net amortization and deferral |  |  | $ 240
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Noninterest Expense | Other Noninterest Expense | Other Noninterest Expense
Net periodic pension cost (benefit) | $ (151) | $ (340) | $ 44
Total pension cost (benefit) | (151) | (340) | 44
Net loss (gain) recognized in other comprehensive income | (972) | (736) | (854)
Total recognized in net periodic benefit cost and other comprehensive loss (before tax) | $ (1,123) | $ (1,076) | $ (810)

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