Loans Held for Investment and Allowance for Loan Losses - Schedule of Non-Accrual Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total	$ 60,311	$ 33,609	$ 28,672
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	4,080	4,132	4,818
Commercial [Member] | C&I [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	4,080	4,132	4,818
Commercial [Member] | Muncipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	0	0	0
Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	2,028	155	133
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	53,183	28,741	22,942
Real Estate [Member] | Construction & Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	1,679	1,444	2,835
Real Estate [Member] | Farm [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	4,299	4,804	701
Real Estate [Member] | Non-Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	9,615	8,022	5,329
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	31,606	6,822	7,308
Real Estate [Member] | Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	5,984	7,649	6,769
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	1,020	581	779
Consumer [Member] | Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	710	464	649
Consumer [Member] | Non-Auto [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non accrual loans	$ 310	$ 117	$ 130