Allowance for Credit Losses - Analysis of Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans	$ 6,113,421	$ 4,916,624
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	4,049,893	3,306,054
Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,162,989	1,071,551
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	507,685	259,355
Construction
Financing Receivable, Past Due [Line Items]
Loans	313,646	222,281
Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	71,373	50,811
Leases
Financing Receivable, Past Due [Line Items]
Loans	7,835	6,572
CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,993,848	1,603,141
CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	933,589	706,307
Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	869,970	823,500
Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	252,486	173,106
SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	718,690	666,960
SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	384,813	337,513
Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	59,486	67,078
Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	6,113,421	4,916,624
Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	4,049,893	3,306,054
Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,162,989	1,071,551
Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	507,685	259,355
Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	313,646	222,281
Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	71,373	50,811
Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Loans	7,835	6,572
Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,993,848	1,603,141
Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	933,589	706,307
Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	869,970	823,500
Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	252,486	173,106
Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	718,690	666,960
Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	384,813	337,513
Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	59,486	67,078
Total Past Due Loans | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	5,920	4,332
Total Past Due Loans | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	2,016	1,509
Total Past Due Loans | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	3,242	2,128
Total Past Due Loans | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	490	557
Total Past Due Loans | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	84	90
Total Past Due Loans | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	88	48
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	1,222	263
Total Past Due Loans | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	459	671
Total Past Due Loans | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	0	0
Total Past Due Loans | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	335	575
Total Past Due Loans | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	754	375
Total Past Due Loans | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	2,169	1,609
Total Past Due Loans | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	319	144
30-59 days | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	1,684	836
30-59 days | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	410	497
30-59 days | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,128	145
30-59 days | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	58	146
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	88	48
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	0	226
30-59 days | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	75	271
30-59 days | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	0	0
30-59 days | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	335	0
30-59 days | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	76	0
30-59 days | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	858	36
30-59 days | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	194	109
60-89 days | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	1,299	880
60-89 days | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	111	164
60-89 days | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	822	381
60-89 days | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	282	245
60-89 days | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	84	90
60-89 days | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	0	0
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	0	37
60-89 days | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	111	127
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	0
60-89 days | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	387	13
60-89 days | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	396	361
60-89 days | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	39	7
> 90 days | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	2,937	2,616
> 90 days | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,495	848
> 90 days | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,292	1,602
> 90 days | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	150	166
> 90 days | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	0	0
> 90 days | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	0	0
> 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	1,222	0
> 90 days | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	273	273
> 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	0	575
> 90 days | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	291	362
> 90 days | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	915	1,212
> 90 days | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	86	28
Current | Financial Asset Originated
Financing Receivable, Past Due [Line Items]
Loans	6,107,501	4,912,292
Current | Financial Asset Originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	4,047,877	3,304,545
Current | Financial Asset Originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,159,747	1,069,423
Current | Financial Asset Originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	507,195	258,798
Current | Financial Asset Originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	313,562	222,191
Current | Financial Asset Originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	71,285	50,763
Current | Financial Asset Originated | Leases
Financing Receivable, Past Due [Line Items]
Loans	7,835	6,572
Current | Financial Asset Originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,992,626	1,602,878
Current | Financial Asset Originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	933,130	705,636
Current | Financial Asset Originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	869,970	823,500
Current | Financial Asset Originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	252,151	172,531
Current | Financial Asset Originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	717,936	666,585
Current | Financial Asset Originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	382,644	335,904
Current | Financial Asset Originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	$ 59,167	$ 66,934