Loan And Allowance For Credit Losses - Schedule of Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	$ 17,573	$ 14,541
Loans collectively evaluated for credit losses	71,161	61,293
Total allowance for loan losses	88,734	75,834	$ 63,465
Agricultural [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	750	398
Loans collectively evaluated for credit losses	531	643
Total allowance for loan losses	1,281	1,041	1,597
C&I [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	5,858	8,398
Loans collectively evaluated for credit losses	9,840	7,731
Total allowance for loan losses	15,698	16,129	12,280
Muncipal [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	0	0
Loans collectively evaluated for credit losses	195	1,026
Total allowance for loan losses	195	1,026	348
Construction & Development [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,401	305
Loans collectively evaluated for credit losses	26,152	26,138
Total allowance for loan losses	28,553	26,443	17,627
Farm [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	994	36
Loans collectively evaluated for credit losses	1,920	1,921
Total allowance for loan losses	2,914	1,957	663
Non - Owner Occupied CRE [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	3,684	2,357
Loans collectively evaluated for credit losses	9,741	6,718
Total allowance for loan losses	13,425	9,075	10,722
Owner Occupied CRE [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	1,663	1,600
Loans collectively evaluated for credit losses	12,150	8,328
Total allowance for loan losses	13,813	9,928	10,828
Residential [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	2,159	1,444
Loans collectively evaluated for credit losses	9,495	7,631
Total allowance for loan losses	11,654	9,075	8,133
Auto [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	4	2
Loans collectively evaluated for credit losses	806	843
Total allowance for loan losses	810	845	896
Non - Auto [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	60	1
Loans collectively evaluated for credit losses	331	314
Total allowance for loan losses	$ 391	$ 315	$ 371