Loan And Allowance For Credit Losses - Schedule of Investment in Loans Related to Balance in Allowance for Loan Losses on Basis of Company's Impairment Methodology (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	$ 233,851	$ 176,213
Loans collectively evaluated for credit losses	7,679,247	6,972,578
Total Loans	7,913,098	7,148,791
Agricultural [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	4,211	1,459
Loans collectively evaluated for credit losses	91,332	83,431
Total Loans	95,543	84,890
Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,546,239	1,379,661
Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	5,479,701	5,007,955
Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	791,615	676,285
C&I [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	29,762	22,765
Loans collectively evaluated for credit losses	1,147,231	1,142,046
Total Loans	1,176,993	1,164,811
C&I [Member] | Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,176,993	1,164,811
Muncipal [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	409	733
Loans collectively evaluated for credit losses	368,837	214,117
Total Loans	369,246	214,850
Muncipal [Member] | Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	369,246	214,850
Construction & Development [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	11,174	23,989
Loans collectively evaluated for credit losses	1,043,429	939,169
Total Loans	1,054,603	963,158
Construction & Development [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,054,603	963,158
Farm [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	10,588	6,166
Loans collectively evaluated for credit losses	329,077	338,788
Total Loans	339,665	344,954
Farm [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	339,665	344,954
Non - Owner Occupied CRE [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	39,894	37,139
Loans collectively evaluated for credit losses	765,672	790,830
Total Loans	805,566	827,969
Non - Owner Occupied CRE [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	805,566	827,969
Owner Occupied CRE [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	79,470	42,568
Loans collectively evaluated for credit losses	1,003,630	994,713
Total Loans	1,083,100	1,037,281
Owner Occupied CRE [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,083,100	1,037,281
Residential [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	53,659	37,906
Loans collectively evaluated for credit losses	2,143,108	1,796,687
Total Loans	2,196,767	1,834,593
Residential [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	2,196,767	1,834,593
Auto [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	3,579	2,589
Loans collectively evaluated for credit losses	634,981	519,270
Total Loans	638,560	521,859
Auto [Member] | Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	638,560	521,859
Non - Auto [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Loans individually evaluated for credit losses	1,105	899
Loans collectively evaluated for credit losses	151,950	153,527
Total Loans	153,055	154,426
Non - Auto [Member] | Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	$ 153,055	$ 154,426