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Loans and Allowance for Credit Losses - Summary of Loan Portfolio Individually and Collectively Evaluated for Impairment (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | $ 2,400,732 |  |
Less: Deferred loan fees, net of costs, excluding PPP loans |  | (1,640) |  |
Total, excluding PPP loans |  | 2,399,092 |  |
Attributable to specific reserve | $ 35,893 | 30,740 | $ 12,121 | $ 13,827
Commercial and Industrial [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Attributable to specific reserve | 27,754 | 27,070 |  |
Consumer [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Attributable to specific reserve | $ 8,139 | 3,670 |  |
PCI Loans [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 58,748 |  |
PCI Loans [Member] | Commercial and Industrial [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 1,481 |  |
PCI Loans [Member] | Construction, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 7 |  |
PCI Loans [Member] | Mortgage, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 51,223 |  |
PCI Loans [Member] | Mortgage, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 5,678 |  |
PCI Loans [Member] | Consumer [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 359 |  |
Originated and Purchased Performing Loans [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 2,341,984 |  |
Originated and Purchased Performing Loans [Member] | Commercial and Industrial [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 588,568 |  |
Originated and Purchased Performing Loans [Member] | Construction, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 183,294 |  |
Originated and Purchased Performing Loans [Member] | Construction, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 76,599 |  |
Originated and Purchased Performing Loans [Member] | Mortgage, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 813,766 |  |
Originated and Purchased Performing Loans [Member] | Mortgage, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 626,094 |  |
Originated and Purchased Performing Loans [Member] | Mortgage, Farmland [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 6,599 |  |
Originated and Purchased Performing Loans [Member] | Consumer [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 47,064 |  |
Individually Evaluated for Impairment [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 73,643 |  |
Less: Deferred loan fees, net of costs, excluding PPP loans |  | 0 |  |
Total, excluding PPP loans |  | 73,643 |  |
Individually Evaluated for Impairment [Member] | PCI Loans [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Individually Evaluated for Impairment [Member] | PCI Loans [Member] | Commercial and Industrial [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Individually Evaluated for Impairment [Member] | PCI Loans [Member] | Construction, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Individually Evaluated for Impairment [Member] | PCI Loans [Member] | Mortgage, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Individually Evaluated for Impairment [Member] | PCI Loans [Member] | Mortgage, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Individually Evaluated for Impairment [Member] | PCI Loans [Member] | Consumer [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Individually Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 73,643 |  |
Individually Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Commercial and Industrial [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 67,654 |  |
Individually Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Construction, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 521 |  |
Individually Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Construction, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Individually Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Mortgage, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 4,634 |  |
Individually Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Mortgage, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 834 |  |
Individually Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Mortgage, Farmland [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Individually Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Consumer [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Collectively Evaluated for Impairment [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 2,327,089 |  |
Less: Deferred loan fees, net of costs, excluding PPP loans |  | (1,640) |  |
Total, excluding PPP loans |  | 2,325,449 |  |
Collectively Evaluated for Impairment [Member] | PCI Loans [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 58,748 |  |
Collectively Evaluated for Impairment [Member] | PCI Loans [Member] | Commercial and Industrial [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 1,481 |  |
Collectively Evaluated for Impairment [Member] | PCI Loans [Member] | Construction, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 7 |  |
Collectively Evaluated for Impairment [Member] | PCI Loans [Member] | Mortgage, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 51,223 |  |
Collectively Evaluated for Impairment [Member] | PCI Loans [Member] | Mortgage, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 5,678 |  |
Collectively Evaluated for Impairment [Member] | PCI Loans [Member] | Consumer [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 359 |  |
Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 2,268,341 |  |
Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Commercial and Industrial [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 520,914 |  |
Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Construction, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 182,773 |  |
Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Construction, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 76,599 |  |
Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Mortgage, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 809,132 |  |
Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Mortgage, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 625,260 |  |
Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Mortgage, Farmland [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 6,599 |  |
Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] | Consumer [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 47,064 |  |
Related allowance for loan losses [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 30,740 |  |
Less: Deferred loan fees, net of costs, excluding PPP loans |  | 0 |  |
Total, excluding PPP loans |  | 30,740 |  |
Related allowance for loan losses [Member] | PCI Loans [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 3 |  |
Related allowance for loan losses [Member] | PCI Loans [Member] | Commercial and Industrial [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Related allowance for loan losses [Member] | PCI Loans [Member] | Construction, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Related allowance for loan losses [Member] | PCI Loans [Member] | Mortgage, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 3 |  |
Related allowance for loan losses [Member] | PCI Loans [Member] | Mortgage, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Related allowance for loan losses [Member] | PCI Loans [Member] | Consumer [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 0 |  |
Related allowance for loan losses [Member] | Originated and Purchased Performing Loans [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 30,737 |  |
Related allowance for loan losses [Member] | Originated and Purchased Performing Loans [Member] | Commercial and Industrial [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 23,073 |  |
Related allowance for loan losses [Member] | Originated and Purchased Performing Loans [Member] | Construction, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 1,637 |  |
Related allowance for loan losses [Member] | Originated and Purchased Performing Loans [Member] | Construction, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 628 |  |
Related allowance for loan losses [Member] | Originated and Purchased Performing Loans [Member] | Mortgage, Commercial [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 2,353 |  |
Related allowance for loan losses [Member] | Originated and Purchased Performing Loans [Member] | Mortgage, Residential [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 1,760 |  |
Related allowance for loan losses [Member] | Originated and Purchased Performing Loans [Member] | Mortgage, Farmland [Member] | Real Estate [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | 4 |  |
Related allowance for loan losses [Member] | Originated and Purchased Performing Loans [Member] | Consumer [Member] |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans, excluding PPP loans |  | $ 1,282 |  |

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