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Allowance for Credit Losses - Schedule of Non Accrual Loans (Detail) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | $ 20,961 | $ 18,125
Non accrual, no allowance including guaranteed loans | 21,758 | 18,230
Non accrual including guaranteed loans | 29,756 | 21,321
Total non accrual | 28,820 | 21,096
Past due 90 days or more and still accruing | 43 | 0
Loans Insured or Guaranteed by US Government Authorities |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 797 | 105
Total non accrual | 936 | 225
Commercial Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 11,135 | 8,574
Total non accrual | 16,710 | 8,574
Past due 90 days or more and still accruing | 0 | 0
Consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 5,716 | 6,662
Total non accrual | 6,198 | 7,459
Past due 90 days or more and still accruing | 0 | 0
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 1,479 | 1,224
Total non accrual | 2,907 | 3,518
Past due 90 days or more and still accruing | 43 | 0
Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 71 | 491
Total non accrual | 71 | 491
Past due 90 days or more and still accruing | 0 | 0
Agriculture production |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 3,357 | 1,279
Total non accrual | 3,870 | 1,279
Past due 90 days or more and still accruing | 0 | 0
Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 0 | 0
Total non accrual | 0 | 0
Past due 90 days or more and still accruing | 0 | 0
CRE non-owner occupied | Commercial Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 1,105 | 1,739
Total non accrual | 1,105 | 1,739
Past due 90 days or more and still accruing | 0 | 0
CRE owner occupied | Commercial Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 3,898 | 4,938
Total non accrual | 3,898 | 4,938
Past due 90 days or more and still accruing | 0 | 0
Multifamily | Commercial Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 0 | 125
Total non accrual | 0 | 125
Past due 90 days or more and still accruing | 0 | 0
Farmland | Commercial Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 6,132 | 1,772
Total non accrual | 11,707 | 1,772
Past due 90 days or more and still accruing | 0 | 0
SFR 1-4 1st DT liens | Consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 2,883 | 4,117
Total non accrual | 2,884 | 4,220
Past due 90 days or more and still accruing | 0 | 0
SFR HELOCs and junior liens | Consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 2,751 | 2,498
Total non accrual | 3,158 | 3,155
Past due 90 days or more and still accruing | 0 | 0
Other | Consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 82 | 47
Total non accrual | 156 | 84
Past due 90 days or more and still accruing | $ 0 | $ 0

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