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Allowance for Credit Losses on Loans - Schedule of Non Accrual Loans (Detail) - Financial Asset Originated - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | $ 17,175 | $ 13,909
Non accrual, no allowance including guaranteed loans | 17,988 | 14,825
Non accrual including guaranteed loans | 21,543 | 16,845
Total non accrual | 20,730 | 15,855
Loans Insured or Guaranteed by US Government Authorities |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 813 | 916
Total non accrual | 813 | 990
Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due 90 days or more and still accruing | 31 | 19
Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 6,786 | 5,316
Total non accrual | 6,929 | 5,316
Commercial real estate | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
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 | 9,947 | 9,019
Total non accrual | 12,489 | 9,441
Consumer | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due 90 days or more and still accruing | 1 | 19
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 973 | 476
Total non accrual | 1,680 | 2,050
Commercial and industrial | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due 90 days or more and still accruing | 30 | 0
Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Non accrual with no allowance for credit losses | 0 | 0
Total non accrual | 0 | 0
Construction | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
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 | 282 | 14
Total non accrual | 445 | 38
Agriculture production | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
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 |
Total non accrual | 0 |
Leases | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
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 | 677 | 639
Total non accrual | 677 | 642
CRE non-owner occupied | Commercial real estate | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
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 | 2,266 | 1,411
Total non accrual | 2,409 | 1,408
CRE owner occupied | Commercial real estate | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
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 | 2,024 | 2,024
Total non accrual | 2,024 | 2,024
Multifamily | Commercial real estate | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
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 | 1,819 | 1,242
Total non accrual | 1,819 | 1,242
Farmland | Commercial real estate | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
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 | 5,737 | 5,023
Total non accrual | 6,719 | 5,192
SFR 1-4 1st DT Liens | Consumer | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
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 | 4,128 | 3,992
Total non accrual | 5,665 | 4,217
SFR HELOCs and junior liens | Consumer | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
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 | 4
Total non accrual | 105 | 32
Other | Consumer | Financial Asset, Equal to or Greater than 90 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due 90 days or more and still accruing | $ 1 | $ 19

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