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Loans Held for Investment and Allowance for Credit Losses on Loans - Transfers from Loans and Premises and Equipment to Other Real Estate Owned and Repossessed Assets (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Noncash Investing and Financing Items [Abstract] |  |
Other real estate owned | $ 565 | $ 2,153
Repossessed assets | 395 | 277
Total | $ 960 | $ 2,430

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