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Loans - Schedule of Impaired Loans (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Receivables [Abstract] |  |
Impaired loans without a valuation allowance | $ 4,194 |
Impaired loans with a valuation allowance | 4,663 |
Total impaired loans | 8,857 |
Valuation allowance related to impaired loans | 1,996 |
Total nonaccrual loans | 4,689 |
Total loans past-due ninety days or more and still accruing | 0 |
Average investment in impaired loans | 10,710 | $ 12,247
Interest income recognized on impaired loans | 361 | 292
Interest income recognized on a cash basis on impaired loans | $ 97 | $ 188

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