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Securities - Additional Information (Detail) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items] |  |
Unrealized loss on securities | $ 0 |
Available for sale securities pledged as collateral | $ 22,900,000 | $ 23,400,000
Minimum | U.S. Government and its Agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Holdings of securities as percentage of share holders' equity | 10.00% |

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