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Allowance for Credit Losses - Summary of Nonaccrual Loans Excluding Purchased Credit-Impaired (PCI) Loans (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | $ 2,658 | $ 1,198
Nonaccrual loans without a related ACL | 10,577 | 11,269
Total Nonaccrual loans | 13,235 | 12,467
Interest Income Recognized | 54 | 46
Commercial and Agriculture [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 982 | 914
Nonaccrual loans without a related ACL | 2,843 | 4,891
Total Nonaccrual loans | 3,825 | 5,805
Interest Income Recognized | 6 | 9
Commercial Real Estate Owner Occupied [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 32 | 269
Nonaccrual loans without a related ACL | 447 | 3
Total Nonaccrual loans | 479 | 272
Interest Income Recognized | 21 | 7
Commercial Real Estate Non Owner Occupied [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 1,059 |
Nonaccrual loans without a related ACL | 1,954 | 1,167
Total Nonaccrual loans | 3,013 | 1,167
Residential Real Estate [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans without a related ACL | 4,646 | 4,633
Total Nonaccrual loans | 4,646 | 4,633
Interest Income Recognized | 24 | 26
Real Estate Construction [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans without a related ACL |  | 41
Total Nonaccrual loans |  | 41
Interest Income Recognized | 2 |
Lease Financing Receivables [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans with a related ACL | 585 | 15
Nonaccrual loans without a related ACL | 643 | 492
Total Nonaccrual loans | 1,228 | 507
Consumer and Other [Member] |  |
Financing Receivable Recorded Investment [Line Items] |  |
Nonaccrual loans without a related ACL | 44 | 42
Total Nonaccrual loans | 44 | 42
Interest Income Recognized | $ 1 | $ 4

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