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Loans and Allowance for Credit Losses - Troubled Debt Restructuring is 90 Days or More Past Due (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $ 0 | $ 17
Residential real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default |  | 17
Senior Lien | Residential real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default |  | $ 17

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