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Allowance for Loan Losses - Summary of Nonaccrual Loans Excluding Purchased Credit-Impaired (PCI) Loans (Detail) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | $ 819 |
Nonaccrual loans without a related ACL | 7,894 |
Total Nonaccrual loans | 8,713 | $ 6,507
Interest Income Recognized | 16 |
Commercial and Agriculture [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 362 |
Nonaccrual loans without a related ACL | 1,294 |
Total Nonaccrual loans | 1,656 | 774
Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans without a related ACL | 270 |
Total Nonaccrual loans | 270 | 386
Interest Income Recognized | 3 |
Commercial Real Estate Non Owner Occupied [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 306 |
Nonaccrual loans without a related ACL | 899 |
Total Nonaccrual loans | 1,205 | 1,109
Residential Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans without a related ACL | 4,391 |
Total Nonaccrual loans | 4,391 | 3,926
Interest Income Recognized | 13 |
Real Estate Construction [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans without a related ACL | 203 |
Total Nonaccrual loans | 203 | 221
Lease Financing Receivables [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 151 |
Nonaccrual loans without a related ACL | 794 |
Total Nonaccrual loans | 945 |
Consumer and Other [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans without a related ACL | 43 |
Total Nonaccrual loans | $ 43 | $ 91

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