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Loans and ACL - Summary of Amortized Cost of Loans Held for Investment (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	$ 1,911,528	$ 2,110,755
Deferred costs, net of loan fees	1,198	1,042
Total	1,912,726	2,111,797
Commercial and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	276,609	354,904
Construction, Commercial [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	73,473	114,491
Construction, Residential [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	50,892	51,807
Commercial [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	818,101	847,842
Residential [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	654,030	692,253
Farmland [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	4,645	5,520
Consumer [Member]
Loans and Leases Receivable Disclosure [Line Items]
Gross loans	$ 33,778	$ 43,938

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