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Allowance for Credit Losses - Summary of Nonaccrual Loans Excluding Purchased Credit-Impaired (PCI) Loans (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | $ 11,508 | $ 1,198
Nonaccrual loans without a related ACL | 4,446 | 11,269
Total Nonaccrual loans | 15,954 | 12,467
Commercial and Agriculture [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 1,903 | 914
Nonaccrual loans without a related ACL | 2,296 | 4,891
Total Nonaccrual loans | 4,199 | 5,805
Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 129 | 269
Nonaccrual loans without a related ACL |  | 3
Total Nonaccrual loans | 129 | 272
Commercial Real Estate Non Owner Occupied [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 3,012 |
Nonaccrual loans without a related ACL |  | 1,167
Total Nonaccrual loans | 3,012 | 1,167
Residential Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 4,942 |
Nonaccrual loans without a related ACL | 2,046 | 4,633
Total Nonaccrual loans | 6,988 | 4,633
Real Estate Construction [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans without a related ACL |  | 41
Total Nonaccrual loans |  | 41
Lease Financing Receivables [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 1,495 | 15
Nonaccrual loans without a related ACL | 104 | 492
Total Nonaccrual loans | 1,599 | 507
Consumer and Other [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 27 |
Nonaccrual loans without a related ACL |  | 42
Total Nonaccrual loans | $ 27 | $ 42

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