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Loans and ACL - Summary of Amortized Cost of Loans Held for Investment (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	$ 2,179,508	$ 2,430,117
Deferred costs, net of loan fees	905	830
Total	2,180,413	2,430,947
Commercial and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	378,922	508,944
Construction, commercial [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	116,276	180,052
Construction, Residential [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	43,322	75,832
Commercial [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	873,721	870,540
Residential [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	713,442	730,110
Farmland [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	5,619	5,470
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	$ 48,206	$ 59,169

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