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Loans and Allowance for Loan Losses - Summary of Loan Portfolio Individually and Collectively Evaluated for Impairment (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | $ 1,753,216 | $ 733,619
Less: Deferred loan fees, net of costs, excluding PPP loans | (763) | (736)
Total, excluding PPP loans | 1,752,453 | 732,883
Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 1,669,172 | 732,534
PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 84,044 | 1,085
Individually Evaluated for Impairment [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 8,233 | 2,331
Total, excluding PPP loans | 8,233 | 2,331
Individually Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 8,233 | 2,331
Collectively Evaluated for Impairment [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 1,744,983 | 731,288
Less: Deferred loan fees, net of costs, excluding PPP loans | (763) | (736)
Total, excluding PPP loans | 1,744,220 | 730,552
Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 1,660,939 | 730,203
Collectively Evaluated for Impairment [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 84,044 | 1,085
Commercial and Industrial [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 300,111 | 123,675
Commercial and Industrial [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 8,947 |
Commercial and Industrial [Member] | Individually Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 4,697 | 234
Commercial and Industrial [Member] | Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 295,414 | 123,441
Commercial and Industrial [Member] | Collectively Evaluated for Impairment [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 8,947 |
Construction, Commercial [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 125,271 | 54,667
Construction, Commercial [Member] | Real Estate [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 14,015 | 35
Construction, Commercial [Member] | Individually Evaluated for Impairment [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 531 |
Construction, Commercial [Member] | Collectively Evaluated for Impairment [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 124,740 | 54,667
Construction, Commercial [Member] | Collectively Evaluated for Impairment [Member] | Real Estate [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 14,015 | 35
Construction, Residential [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 51,098 | 18,040
Construction, Residential [Member] | Collectively Evaluated for Impairment [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 51,098 | 18,040
Mortgage, Commercial [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 627,938 | 272,691
Mortgage, Commercial [Member] | Real Estate [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 52,371 | 808
Mortgage, Commercial [Member] | Individually Evaluated for Impairment [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 1,333 | 1,645
Mortgage, Commercial [Member] | Collectively Evaluated for Impairment [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 626,605 | 271,046
Mortgage, Commercial [Member] | Collectively Evaluated for Impairment [Member] | Real Estate [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 52,371 | 808
Mortgage, Residential [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 491,690 | 213,162
Mortgage, Residential [Member] | Real Estate [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 7,671 | 242
Mortgage, Residential [Member] | Individually Evaluated for Impairment [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 1,672 | 452
Mortgage, Residential [Member] | Collectively Evaluated for Impairment [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 490,018 | 212,710
Mortgage, Residential [Member] | Collectively Evaluated for Impairment [Member] | Real Estate [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 7,671 | 242
Mortgage, Farmland [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 6,317 | 3,615
Mortgage, Farmland [Member] | Collectively Evaluated for Impairment [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 6,317 | 3,615
Consumer [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 66,747 | 46,684
Consumer [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 1,040 |
Consumer [Member] | Collectively Evaluated for Impairment [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 66,747 | $ 46,684
Consumer [Member] | Collectively Evaluated for Impairment [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | $ 1,040 |

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