Loans And Allowance For Credit Losses - Loans Held-for-Investment by Portfolio Segment (Detail) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		$ 7,148,791	$ 6,441,868
Less - allowance for credit losses		(88,734)	(75,834)	$ (63,465)
Net loans held – for -investment		7,060,057	6,366,034
Commercial [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		1,379,661	1,138,407
Agricultural [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		84,890	76,947
Less - allowance for credit losses		(1,281)	(1,041)	(1,597)
Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		5,007,955	4,527,995
Consumer [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		676,285	698,519
C&I [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		1,164,811	917,317
Less - allowance for credit losses		(15,698)	(16,129)	(12,280)
C&I [Member] | Commercial [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans	[1]	1,164,811	917,317
Muncipal [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		214,850	221,090
Less - allowance for credit losses		(195)	(1,026)	(348)
Muncipal [Member] | Commercial [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		214,850	221,090
Construction & Development [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		963,158	959,426
Less - allowance for credit losses		(28,553)	(26,443)	(17,627)
Construction & Development [Member] | Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		963,158	959,426
Farm [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		344,954	306,322
Less - allowance for credit losses		(2,914)	(1,957)	(663)
Farm [Member] | Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		344,954	306,322
Non - Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		827,969	732,089
Less - allowance for credit losses		(13,425)	(9,075)	(10,722)
Non - Owner Occupied CRE [Member] | Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		827,969	732,089
Owner Occupied CRE [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		1,037,281	954,400
Less - allowance for credit losses		(13,813)	(9,928)	(10,828)
Owner Occupied CRE [Member] | Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		1,037,281	954,400
Residential [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		1,834,593	1,575,758
Less - allowance for credit losses		(11,654)	(9,075)	(8,133)
Residential [Member] | Real Estate [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		1,834,593	1,575,758
Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		521,859	550,635
Less - allowance for credit losses		(810)	(845)	(896)
Auto [Member] | Consumer [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		521,859	550,635
Non - Auto [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		154,426	147,884
Less - allowance for credit losses		(391)	(315)	$ (371)
Non - Auto [Member] | Consumer [Member]
Loans And Leases Receivable Disclosure [Line Items]
Total Loans		$ 154,426	$ 147,884

[1] All disclosures for the C&I loan segment include PPP loan balances, net of deferred fees, as disclosed on the face of the consolidated balance sheet.