Loans And Allowance For Credit Losses - Schedule of Past Due Loans (Detail) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 6,442,000	$ 5,389,000
Total Loans		6,441,868	5,388,972
Total 90 Days Past Due Still Accruing		0	8
Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	20,806	14,005
Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,977	665
Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		2,087	915
Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		24,870	15,585
Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		6,416,998	5,373,387
C&I [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		917,000	837,000
Total Loans		917,317	837,075
Muncipal [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		221,000	178,000
Total Loans		221,090	177,905
Construction & Development [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		960,000	750,000
Total Loans		959,426	749,793
Farm [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		306,000	217,000
Total Loans		306,322	217,220
Non - Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		732,000	624,000
Total Loans		732,089	623,434
Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		954,000	822,000
Total Loans		954,400	821,653
Residential [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,576,000	1,334,000
Total Loans		1,575,758	1,334,419
Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		551,000	405,000
Total Loans		550,635	405,416
Non - Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		148,000	124,000
Total Loans		147,884	123,968
Commercial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		1,138,407	1,014,980
Total 90 Days Past Due Still Accruing			5
Commercial [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	4,000
Total Loans	[1]		3,701
Commercial [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,080	34
Commercial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,646	222
Commercial [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		6,726	3,957
Commercial [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,131,681	1,011,023
Commercial [Member] | C&I [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans	[2]	917,317	837,075
Total 90 Days Past Due Still Accruing			5
Commercial [Member] | C&I [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	3,924	3,638
Commercial [Member] | C&I [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		297	34
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		1,646	222
Commercial [Member] | C&I [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		5,867	3,894
Commercial [Member] | C&I [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		911,450	833,181
Commercial [Member] | Muncipal [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		221,090	177,905
Commercial [Member] | Muncipal [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	76	63
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		859	63
Commercial [Member] | Muncipal [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		220,231	177,842
Agricultural [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		77,000	98,000
Total Loans		76,947	98,089
Agricultural [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	243	181
Agricultural [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		243	181
Agricultural [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		76,704	97,908
Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		4,527,995	3,746,519
Real Estate [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	15,734	9,585
Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		867	581
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		441	690
Real Estate [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		17,042	10,856
Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		4,510,953	3,735,663
Real Estate [Member] | Construction & Development [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		959,426	749,793
Real Estate [Member] | Construction & Development [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	3,751	2,953
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			39
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		175
Real Estate [Member] | Construction & Development [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			2,992
Total Loans		3,926
Real Estate [Member] | Construction & Development [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		955,500	746,801
Real Estate [Member] | Farm [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		306,322	217,220
Real Estate [Member] | Farm [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	668	600
Real Estate [Member] | Farm [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			215
Real Estate [Member] | Farm [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		668	815
Real Estate [Member] | Farm [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		305,654	216,405
Real Estate [Member] | Non - Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		732,089	623,434
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]	1,444	235
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		1,604	235
Real Estate [Member] | Non - Owner Occupied CRE [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		730,485	623,199
Real Estate [Member] | Owner Occupied CRE [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		954,400	821,653
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]		813
Total Loans	[1]	1,151
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			280
Real Estate [Member] | Owner Occupied CRE [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,151	1,093
Real Estate [Member] | Owner Occupied CRE [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		953,249	820,560
Real Estate [Member] | Residential [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		1,575,758	1,334,419
Real Estate [Member] | Residential [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	8,720	4,984
Real Estate [Member] | Residential [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		707	327
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		266	410
Real Estate [Member] | Residential [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		9,693	5,721
Real Estate [Member] | Residential [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,566,065	1,328,698
Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		698,519	529,384
Total 90 Days Past Due Still Accruing			3
Consumer [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	829	538
Consumer [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		30	50
Consumer [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			3
Consumer [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		859	591
Consumer [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		697,660	528,793
Consumer [Member] | Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		550,635	405,416
Consumer [Member] | Auto [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	779	393
Consumer [Member] | Auto [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		30	26
Consumer [Member] | Auto [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		809	419
Consumer [Member] | Auto [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		549,826	404,997
Consumer [Member] | Non - Auto [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Loans		147,884	123,968
Total 90 Days Past Due Still Accruing			3
Consumer [Member] | Non - Auto [Member] | Financing Receivables15 To59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due	[1]	50	145
Consumer [Member] | Non - Auto [Member] | Financial Asset, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			24
Consumer [Member] | Non - Auto [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due			3
Consumer [Member] | Non - Auto [Member] | Financial Asset, Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		50	172
Consumer [Member] | Non - Auto [Member] | Financial Asset, Not Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 147,834	$ 123,796

[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.