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Securities - Additional Information (Detail) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 USD ($) Security | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($)
Investments Debt And Equity Securities [Abstract] |  |  |
Proceeds from sale of securities available-for-sale | $ 0 | $ 0 |
Gross realized gains (losses) on securities available-for-sale | 0 | $ 0 |
Carrying value of pledged securities | $ 238,726,000 |  | $ 218,344,000
Number of securities in portfolio with unrealized losses | Security | 413 |  |

X
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