Allowance for Credit Losses - Analysis of Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans	$ 4,916,624	$ 4,763,127
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	3,306,054	2,951,902
Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,071,551	952,108
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	259,355	526,327
Construction
Financing Receivable, Past Due [Line Items]
Loans	222,281	284,842
Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	50,811	44,164
Leases
Financing Receivable, Past Due [Line Items]
Loans	6,572	3,784
CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,603,141	1,535,555
CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	706,307	624,375
Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	823,500	639,480
Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	173,106	152,492
SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	666,960	546,592
SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	337,513	327,484
Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	67,078	78,032
Financial asset originated
Financing Receivable, Past Due [Line Items]
Loans	4,916,624	4,763,127
Financial asset originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	3,306,054	2,951,902
Financial asset originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,071,551	952,108
Financial asset originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	259,355	526,327
Financial asset originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	222,281	284,842
Financial asset originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	50,811	44,164
Financial asset originated | Leases
Financing Receivable, Past Due [Line Items]
Loans	6,572	3,784
Financial asset originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,603,141	1,535,555
Financial asset originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	706,307	624,375
Financial asset originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	823,500	639,480
Financial asset originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	173,106	152,492
Financial asset originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	666,960	546,592
Financial asset originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	337,513	327,484
Financial asset originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	67,078	78,032
Total Past Due Loans | Financial asset originated
Financing Receivable, Past Due [Line Items]
Loans	4,332	6,767
Total Past Due Loans | Financial asset originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,509	2,629
Total Past Due Loans | Financial asset originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	2,128	3,452
Total Past Due Loans | Financial asset originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	557	686
Total Past Due Loans | Financial asset originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	90	0
Total Past Due Loans | Financial asset originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	48	0
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	263	539
Total Past Due Loans | Financial asset originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	671	1,121
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	575	969
Total Past Due Loans | Financial asset originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	375	997
Total Past Due Loans | Financial asset originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,609	2,301
Total Past Due Loans | Financial asset originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	144	154
30-59 days | Financial asset originated
Financing Receivable, Past Due [Line Items]
Loans	836	1,974
30-59 days | Financial asset originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	497	1,323
30-59 days | Financial asset originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	145	496
30-59 days | Financial asset originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	146	155
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	48	0
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	226	127
30-59 days | Financial asset originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	271	297
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	0	899
30-59 days | Financial asset originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	0	37
30-59 days | Financial asset originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	36	418
30-59 days | Financial asset originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	109	41
60-89 days | Financial asset originated
Financing Receivable, Past Due [Line Items]
Loans	880	824
60-89 days | Financial asset originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	164	173
60-89 days | Financial asset originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	381	225
60-89 days | Financial asset originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	245	426
60-89 days | Financial asset originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	90	0
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	37	173
60-89 days | Financial asset originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	127	0
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	13	0
60-89 days | Financial asset originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	361	212
60-89 days | Financial asset originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	7	13
> 90 days | Financial asset originated
Financing Receivable, Past Due [Line Items]
Loans	2,616	3,969
> 90 days | Financial asset originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	848	1,133
> 90 days | Financial asset originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,602	2,731
> 90 days | Financial asset originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	166	105
> 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	0	239
> 90 days | Financial asset originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	273	824
> 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	575	70
> 90 days | Financial asset originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	362	960
> 90 days | Financial asset originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,212	1,671
> 90 days | Financial asset originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	28	100
Current | Financial asset originated
Financing Receivable, Past Due [Line Items]
Loans	4,912,292	4,756,360
Current | Financial asset originated | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	3,304,545	2,949,273
Current | Financial asset originated | Consumer
Financing Receivable, Past Due [Line Items]
Loans	1,069,423	948,656
Current | Financial asset originated | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	258,798	525,641
Current | Financial asset originated | Construction
Financing Receivable, Past Due [Line Items]
Loans	222,191	284,842
Current | Financial asset originated | Agriculture production
Financing Receivable, Past Due [Line Items]
Loans	50,763	44,164
Current | Financial asset originated | Leases
Financing Receivable, Past Due [Line Items]
Loans	6,572	3,784
Current | Financial asset originated | CRE non-owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	1,602,878	1,535,016
Current | Financial asset originated | CRE owner occupied | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	705,636	623,254
Current | Financial asset originated | Multifamily | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	823,500	639,480
Current | Financial asset originated | Farmland | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	172,531	151,523
Current | Financial asset originated | SFR 1-4 1st DT liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	666,585	545,595
Current | Financial asset originated | SFR HELOCs and junior liens | Consumer
Financing Receivable, Past Due [Line Items]
Loans	335,904	325,183
Current | Financial asset originated | Other | Consumer
Financing Receivable, Past Due [Line Items]
Loans	$ 66,934	$ 77,878