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Qualified Affordable Housing Project Investments - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Investment Program, Proportional Amortization Method, Elected [Line Items] |  |  |
Investments in qualified affordable housing projects included in other assets | $ 15,850 | $ 15,122 |
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] | Other Assets | Other Assets |
Unfunded commitments related to the investments in qualified affordable housing projects | $ 5,668 | $ 5,722 |
Recognized amortization expense | $ 1,273 | $ 1,035 | $ 1,086
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] | Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest | Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest | Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Cash Flows [Extensible Enumeration Not Disclosed Flag] | true | true | true
Recognized tax credits and other benefits from its investments in affordable housing tax credits | $ 1,562 | $ 1,655 | $ 1,391
Investment Program, Proportional Amortization Method Elected Income Tax Credit And Other Income Tax Benefit Before Amortization Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag | true | true | true
Investment Program, Proportional Amortization Method Elected Income Tax Credit And Other Income Tax Benefit Before Amortization Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag | true | true | true
Impairment losses related to its investment in qualified affordable housing projects | $ 0 | $ 0 | $ 0

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