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Loans and Allowance for Loan Losses - Summary of Loan Portfolio Individually and Collectively Evaluated for Impairment (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	$ 1,730,389	$ 733,619
Less: Deferred loan fees, net of costs, excluding PPP loans	(722)	(736)
Total, excluding PPP loans	1,729,667	732,883
Originated and Purchased Performing Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	1,636,226	732,534
PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	94,163	1,085
Individually Evaluated for Impairment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	7,700	2,331
Total, excluding PPP loans	7,700	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	7,700	2,331
Collectively Evaluated for Impairment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	1,722,689	731,288
Less: Deferred loan fees, net of costs, excluding PPP loans	(722)	(736)
Total, excluding PPP loans	1,721,967	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	1,628,526	730,203
Collectively Evaluated for Impairment [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	94,163	1,085
Commercial and Industrial [Member] | Originated and Purchased Performing Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	294,943	123,675
Commercial and Industrial [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	9,235
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	4,810	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	290,133	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	9,235
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	120,494	54,667
Construction, Commercial [Member] | Real Estate [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	22,721
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	536
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	119,958	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	22,721
Construction, Residential [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	47,894	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	47,894	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	619,647	272,691
Mortgage, Commercial [Member] | Real Estate [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	52,945
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	1,378	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	618,269	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	52,945
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	482,847	213,162
Mortgage, Residential [Member] | Real Estate [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	7,906
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	976	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	481,871	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	7,906
Mortgage, Farmland [Member] | Real Estate [Member] | Originated and Purchased Performing Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	6,537	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	6,537	3,615
Consumer [Member] | Originated and Purchased Performing Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	63,864	46,684
Consumer [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	1,356
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	63,864	$ 46,684
Consumer [Member] | Collectively Evaluated for Impairment [Member] | PCI Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans, excluding PPP loans	$ 1,356

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