Loans And Allowance For Credit Losses - Schedule of Past Due Loans (Detail) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 7,149,000	$ 6,442,000
Total Loans		7,148,791	6,441,868
Total 90 Days Past Due Still Accruing		1,004	0
Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	40,151	20,806
Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		5,550	1,977
Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		8,223	2,087
Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		53,924	24,870
Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		7,094,867	6,416,998
C&I [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,165,000	917,000
Total Loans		1,164,811	917,317
Muncipal [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		215,000	221,000
Total Loans		214,850	221,090
Construction & Development [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		963,000	960,000
Total Loans		963,158	959,426
Farm [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		345,000	306,000
Total Loans		344,954	306,322
Non - Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		828,000	732,000
Total Loans		827,969	732,089
Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,037,000	954,000
Total Loans		1,037,281	954,400
Residential [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,835,000	1,576,000
Total Loans		1,834,593	1,575,758
Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		522,000	551,000
Total Loans		521,859	550,635
Non - Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		154,000	148,000
Total Loans		154,426	147,884
Commercial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		1,379,661	1,138,407
Total 90 Days Past Due Still Accruing		141
Commercial [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	8,891
Total Loans	[1]		4,000
Commercial [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,624	1,080
Commercial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,700	1,646
Commercial [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		12,215	6,726
Commercial [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,367,446	1,131,681
Commercial [Member] | C&I [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans	[2]	1,164,811	917,317
Total 90 Days Past Due Still Accruing		141
Commercial [Member] | C&I [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	8,789	3,924
Commercial [Member] | C&I [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,624	297
Commercial [Member] | C&I [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,700	1,646
Commercial [Member] | C&I [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		12,113	5,867
Commercial [Member] | C&I [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,152,698	911,450
Commercial [Member] | Muncipal [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		214,850	221,090
Commercial [Member] | Muncipal [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	102	76
Commercial [Member] | Muncipal [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			783
Commercial [Member] | Muncipal [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		102	859
Commercial [Member] | Muncipal [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		214,748	220,231
Agricultural [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		85,000	77,000
Total Loans		84,890	76,947
Agricultural [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	850	243
Agricultural [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		246
Agricultural [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		4
Agricultural [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,100	243
Agricultural [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		83,790	76,704
Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		5,007,955	4,527,995
Total 90 Days Past Due Still Accruing		863
Real Estate [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	28,587	15,734
Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		3,378	867
Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		6,495	441
Real Estate [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		38,460	17,042
Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		4,969,495	4,510,953
Real Estate [Member] | Construction & Development [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		963,158	959,426
Total 90 Days Past Due Still Accruing		863
Real Estate [Member] | Construction & Development [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	8,887	3,751
Real Estate [Member] | Construction & Development [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		2,115
Real Estate [Member] | Construction & Development [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,856	175
Real Estate [Member] | Construction & Development [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		12,858	3,926
Real Estate [Member] | Construction & Development [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		950,300	955,500
Real Estate [Member] | Farm [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		344,954	306,322
Real Estate [Member] | Farm [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	1,024	668
Real Estate [Member] | Farm [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		195
Real Estate [Member] | Farm [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,219	668
Real Estate [Member] | Farm [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		343,735	305,654
Real Estate [Member] | Non - Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		827,969	732,089
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	3,565	1,444
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			160
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		3,565	1,604
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		824,404	730,485
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		1,037,281	954,400
Real Estate [Member] | Owner Occupied CRE [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	2,818	1,151
Real Estate [Member] | Owner Occupied CRE [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		240
Real Estate [Member] | Owner Occupied CRE [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,823
Real Estate [Member] | Owner Occupied CRE [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		4,881	1,151
Real Estate [Member] | Owner Occupied CRE [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,032,400	953,249
Real Estate [Member] | Residential [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		1,834,593	1,575,758
Real Estate [Member] | Residential [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	12,293	8,720
Real Estate [Member] | Residential [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		828	707
Real Estate [Member] | Residential [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		2,816	266
Real Estate [Member] | Residential [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		15,937	9,693
Real Estate [Member] | Residential [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,818,656	1,566,065
Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		676,285	698,519
Consumer [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	1,823	829
Consumer [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		302	30
Consumer [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		24
Consumer [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		2,149	859
Consumer [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		674,136	697,660
Consumer [Member] | Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		521,859	550,635
Consumer [Member] | Auto [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	1,482	779
Consumer [Member] | Auto [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		251	30
Consumer [Member] | Auto [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		24
Consumer [Member] | Auto [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,757	809
Consumer [Member] | Auto [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		520,102	549,826
Consumer [Member] | Non - Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		154,426	147,884
Consumer [Member] | Non - Auto [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	341	50
Consumer [Member] | Non - Auto [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		51
Consumer [Member] | Non - Auto [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		392	50
Consumer [Member] | Non - Auto [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 154,034	$ 147,834

[1] The Company monitors commercial, agricultural and real estate loans after such loans are 15 days past due. Consumer loans are monitored after such loans are 30 days past due.

[2] 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.