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Allowance for Credit Losses - Troubled Debt Restructurings (Detail) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 USD ($) investmentSecurity | Mar. 31, 2020 USD ($) investmentSecurity
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 5,000 | 6,000
Pre-mod outstanding principal balance | $ 1,373 | $ 680
Post-mod outstanding principal balance | 1,366 | 738
Financial impact due to TDR taken as additional provision | $ 1,366 | $ 21
Number that defaulted during the period (in investment securities) | investmentSecurity | 4,000 | 1,000
Recorded investment of TDRs that defaulted during the period | $ 1,094 | $ 302
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 2,000 | 3,000
Pre-mod outstanding principal balance | $ 1,057 | $ 487
Post-mod outstanding principal balance | 1,056 | 549
Financial impact due to TDR taken as additional provision | $ 1,056 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 3,000 | 0
Recorded investment of TDRs that defaulted during the period | $ 847 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 0 | 2,000
Pre-mod outstanding principal balance | $ 0 | $ 172
Post-mod outstanding principal balance | 0 | 169
Financial impact due to TDR taken as additional provision | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 1,000
Recorded investment of TDRs that defaulted during the period | $ 0 | $ 302
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 3,000 | 1,000
Pre-mod outstanding principal balance | $ 316 | $ 21
Post-mod outstanding principal balance | 310 | 20
Financial impact due to TDR taken as additional provision | $ 310 | $ 21
Number that defaulted during the period (in investment securities) | investmentSecurity | 1,000 | 0
Recorded investment of TDRs that defaulted during the period | $ 247 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
Construction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0
Recorded investment of TDRs that defaulted during the period | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
Agriculture production |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0
Recorded investment of TDRs that defaulted during the period | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
Leases |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0
Recorded investment of TDRs that defaulted during the period | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
CRE non-owner occupied | Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 1,000 | 1,000
Pre-mod outstanding principal balance | $ 317 | $ 257
Post-mod outstanding principal balance | 314 | 251
Financial impact due to TDR taken as additional provision | $ 314 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0
Recorded investment of TDRs that defaulted during the period | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
CRE owner occupied | Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 1,000 | 0
Pre-mod outstanding principal balance | $ 740 | $ 0
Post-mod outstanding principal balance | 742 | 0
Financial impact due to TDR taken as additional provision | $ 742 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0
Recorded investment of TDRs that defaulted during the period | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
Multifamily | Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0
Recorded investment of TDRs that defaulted during the period | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
Farmland | Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 0 | 2,000
Pre-mod outstanding principal balance | $ 0 | $ 230
Post-mod outstanding principal balance | 0 | 298
Financial impact due to TDR taken as additional provision | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 3,000 | 0
Recorded investment of TDRs that defaulted during the period | $ 847 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
SFR 1-4 1st DT liens | Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 1,000
Recorded investment of TDRs that defaulted during the period | $ 0 | $ 302
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
SFR HELOCs and junior liens | Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 0 | 2,000
Pre-mod outstanding principal balance | $ 0 | $ 172
Post-mod outstanding principal balance | 0 | 169
Financial impact due to TDR taken as additional provision | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0
Recorded investment of TDRs that defaulted during the period | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0
Other | Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Number (in investment securities) | investmentSecurity | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0
Recorded investment of TDRs that defaulted during the period | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge- offs or additional provisions | $ 0 | $ 0

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