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Allowance for Credit Losses - Analysis of Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Loans	$ 6,958,993	$ 6,768,523
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	4,730,732	4,577,632
Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,288,691	1,281,059
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	467,564	471,271
Construction
Financing Receivable, Past Due [Line Items]
Loans	304,920	279,933
Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	161,457	151,822
Leases
Financing Receivable, Past Due [Line Items]
Loans	5,629	6,806
CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	2,438,949	2,323,036
CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	997,205	961,415
Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,030,052	1,028,035
Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	264,526	265,146
SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	850,208	859,660
SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	390,344	363,420
Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	48,139	57,979
Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	6,958,993	6,768,523
Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	4,730,732	4,577,632
Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,288,691	1,281,059
Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	467,564	471,271
Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	304,920	279,933
Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	161,457	151,822
Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Loans	5,629	6,806
Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	2,438,949	2,323,036
Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	997,205	961,415
Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,030,052	1,028,035
Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	264,526	265,146
Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	850,208	859,660
Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	390,344	363,420
Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	48,139	57,979
Total Past Due Loans | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	42,965	32,711
Total Past Due Loans | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	29,380	18,066
Total Past Due Loans | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	7,175	3,875
Total Past Due Loans | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	1,904	10,102
Total Past Due Loans | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	1,863	0
Total Past Due Loans | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	2,643	668
Total Past Due Loans | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Loans	0	0
Total Past Due Loans | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	7,913	2,673
Total Past Due Loans | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	6,668	5,329
Total Past Due Loans | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	460	1,120
Total Past Due Loans | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	14,339	8,944
Total Past Due Loans | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,329	1,562
Total Past Due Loans | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	5,493	2,131
Total Past Due Loans | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	353	182
30-59 days | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	10,498	6,477
30-59 days | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	6,844	5,652
30-59 days | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	3,163	251
30-59 days | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	491	537
30-59 days | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	0	0
30-59 days | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	0	37
30-59 days | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Loans	0	0
30-59 days | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	4,871	221
30-59 days | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,513	1,625
30-59 days | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	460	1,120
30-59 days | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	0	2,686
30-59 days | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	118	0
30-59 days | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	2,926	201
30-59 days | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	119	50
60-89 days | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	1,806	1,681
60-89 days | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	33	198
60-89 days | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,014	858
60-89 days | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	230	308
60-89 days | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	529	0
60-89 days | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	0	317
60-89 days | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Loans	0	0
60-89 days | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	33	0
60-89 days | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	0	85
60-89 days | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	0	0
60-89 days | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	0	113
60-89 days | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	132	6
60-89 days | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	818	852
60-89 days | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	64	0
> 90 days | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	30,661	24,553
> 90 days | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	22,503	12,216
> 90 days | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	2,998	2,766
> 90 days | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	1,183	9,257
> 90 days | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	1,334	0
> 90 days | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	2,643	314
> 90 days | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Loans	0	0
> 90 days | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	3,009	2,452
> 90 days | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	5,155	3,619
> 90 days | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	0	0
> 90 days | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	14,339	6,145
> 90 days | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,079	1,556
> 90 days | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,749	1,078
> 90 days | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	170	132
Current | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	6,916,028	6,735,812
Current | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	4,701,352	4,559,566
Current | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,281,516	1,277,184
Current | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	465,660	461,169
Current | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	303,057	279,933
Current | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	158,814	151,154
Current | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Loans	5,629	6,806
Current | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	2,431,036	2,320,363
Current | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	990,537	956,086
Current | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,029,592	1,026,915
Current | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	250,187	256,202
Current | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	848,879	858,098
Current | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	384,851	361,289
Current | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	$ 47,786	$ 57,797

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