Loan And Allowance For Credit Losses - Schedule of Allowance for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	$ 22,817	$ 17,573
Loans collectively evaluated for credit losses	75,508	71,161
Total allowance for loan losses	98,325	88,734
Agricultural [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	1,165	750
Loans collectively evaluated for credit losses	488	531
Total allowance for loan losses	1,653	1,281
C&I [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	4,505	5,858
Loans collectively evaluated for credit losses	10,931	9,840
Total allowance for loan losses	15,436	15,698
Muncipal [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	0	0
Loans collectively evaluated for credit losses	200	195
Total allowance for loan losses	200	195
Construction & Development [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	491	2,401
Loans collectively evaluated for credit losses	19,370	26,152
Total allowance for loan losses	19,861	28,553
Farm [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	450	994
Loans collectively evaluated for credit losses	2,421	1,920
Total allowance for loan losses	2,871	2,914
Non - Owner Occupied CRE [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	4,258	3,684
Loans collectively evaluated for credit losses	10,406	9,741
Total allowance for loan losses	14,664	13,425
Owner Occupied CRE [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	8,158	1,663
Loans collectively evaluated for credit losses	13,255	12,150
Total allowance for loan losses	21,413	13,813
Residential [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	3,660	2,159
Loans collectively evaluated for credit losses	16,828	9,495
Total allowance for loan losses	20,488	11,654
Auto [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	6	4
Loans collectively evaluated for credit losses	1,180	806
Total allowance for loan losses	1,186	810
Non - Auto [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	124	60
Loans collectively evaluated for credit losses	429	331
Total allowance for loan losses	$ 553	$ 391