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Loans and Allowance for Loan Losses - Summary of Loan Portfolio Individually and Collectively Evaluated for Impairment (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | $ 1,708,034 | $ 733,619
Less: Deferred loan fees, net of costs, excluding PPP loans | (1,118) | (736)
Total, excluding PPP loans | 1,706,916 | 732,883
Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 1,610,142 | 732,534
PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 97,892 | 1,085
Individually Evaluated for Impairment [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 5,692 | 2,331
Total, excluding PPP loans | 5,692 | 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 | 5,692 | 2,331
Collectively Evaluated for Impairment [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 1,702,342 | 731,288
Less: Deferred loan fees, net of costs, excluding PPP loans | (1,118) | (736)
Total, excluding PPP loans | 1,701,224 | 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 | 1,604,450 | 730,203
Collectively Evaluated for Impairment [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 97,892 | 1,085
Commercial and Industrial [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 276,622 | 123,675
Commercial and Industrial [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 10,213 |
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 | 3,169 | 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 | 273,453 | 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 | 10,213 |
Construction, Commercial [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans |  | 35
Construction, Commercial [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 124,581 | 54,667
Construction, Commercial [Member] | Real Estate [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 31,050 |
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 | 540 |
Construction, Commercial [Member] | Collectively Evaluated for Impairment [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans |  | 35
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 | 124,041 | 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 | 31,050 |
Construction, Residential [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 49,338 | 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 | 49,338 | 18,040
Mortgage, Commercial [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans |  | 808
Mortgage, Commercial [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 601,955 | 272,691
Mortgage, Commercial [Member] | Real Estate [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 47,519 |
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 | 1,391 | 1,645
Mortgage, Commercial [Member] | Collectively Evaluated for Impairment [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans |  | 808
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 | 600,564 | 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 | 47,519 |
Mortgage, Residential [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans |  | 242
Mortgage, Residential [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 488,922 | 213,162
Mortgage, Residential [Member] | Real Estate [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 7,379 |
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 | 592 | 452
Mortgage, Residential [Member] | Collectively Evaluated for Impairment [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans |  | 242
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 | 488,330 | 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 | 7,379 |
Mortgage, Farmland [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 5,245 | 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 | 5,245 | 3,615
Consumer [Member] | Originated and Purchased Performing Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 63,479 | 46,684
Consumer [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | 1,731 |
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 | 63,479 | $ 46,684
Consumer [Member] | Collectively Evaluated for Impairment [Member] | PCI Loans [Member] |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Gross loans, excluding PPP loans | $ 1,731 |

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