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Allowance for Credit Losses - Troubled Debt Restructurings (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) investmentSecurity | Dec. 31, 2021 USD ($) investmentSecurity | Dec. 31, 2020 USD ($) investmentSecurity
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 9 | 16 | 18
Pre-mod outstanding principal balance | $ 8,477 | $ 9,083 | $ 6,010
Post-mod outstanding principal balance | 8,819 | 9,116 | 6,074
Financial impact due to TDR taken as additional provision | $ 0 | $ 2,521 | $ 471
Number that defaulted during the period (in investment securities) | investmentSecurity | 3 | 5,000 | 8
Recorded investment of TDR's that defaulted during the period | $ 168 | $ 1,107 | $ 2,862
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ (5) | $ (90)
Commercial real estate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 4 | 8 | 10
Pre-mod outstanding principal balance | $ 1,228 | $ 6,407 | $ 3,732
Post-mod outstanding principal balance | 1,570 | 6,401 | 3,827
Financial impact due to TDR taken as additional provision | $ 0 | $ 1,812 | $ 381
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 3,000 | 3
Recorded investment of TDR's that defaulted during the period | $ 0 | $ 847 | $ 1,542
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ 0
Consumer |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 0 | 1 | 2
Pre-mod outstanding principal balance | $ 0 | $ 200 | $ 172
Post-mod outstanding principal balance | 0 | 247 | 169
Financial impact due to TDR taken as additional provision | $ 0 | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 2 | 0 | 5
Recorded investment of TDR's that defaulted during the period | $ 146 | $ 0 | $ 1,320
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ (90)
Commercial and industrial |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 1 | 7 | 6
Pre-mod outstanding principal balance | $ 39 | $ 2,476 | $ 2,106
Post-mod outstanding principal balance | 39 | 2,468 | 2,078
Financial impact due to TDR taken as additional provision | $ 0 | $ 709 | $ 90
Number that defaulted during the period (in investment securities) | investmentSecurity | 1 | 2,000 | 0
Recorded investment of TDR's that defaulted during the period | $ 22 | $ 260 | $ 0
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ (5) | $ 0
Construction |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 0 | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0 | 0
Recorded investment of TDR's that defaulted during the period | $ 0 | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ 0
Agriculture production |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 4 | 0 | 0
Pre-mod outstanding principal balance | $ 7,210 | $ 0 | $ 0
Post-mod outstanding principal balance | 7,210 | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0 | 0
Recorded investment of TDR's that defaulted during the period | $ 0 | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ 0
Leases |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 0 | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0 | 0
Recorded investment of TDR's that defaulted during the period | $ 0 | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ 0
CRE non-owner occupied | Commercial real estate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 0 | 5 | 1
Pre-mod outstanding principal balance | $ 0 | $ 4,966 | $ 319
Post-mod outstanding principal balance | 0 | 4,956 | 314
Financial impact due to TDR taken as additional provision | $ 0 | $ 1,020 | $ 314
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0 | 1
Recorded investment of TDR's that defaulted during the period | $ 0 | $ 0 | $ 141
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ 0
CRE owner occupied | Commercial real estate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 1 | 1 | 4
Pre-mod outstanding principal balance | $ 0 | $ 740 | $ 1,847
Post-mod outstanding principal balance | 130 | 742 | 1,877
Financial impact due to TDR taken as additional provision | $ 0 | $ 742 | $ 67
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0 | 1
Recorded investment of TDR's that defaulted during the period | $ 0 | $ 0 | $ 950
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ 0
Multifamily | Commercial real estate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 0 | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0 | 0
Recorded investment of TDR's that defaulted during the period | $ 0 | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ 0
Farmland | Commercial real estate |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 3 | 2 | 5
Pre-mod outstanding principal balance | $ 1,228 | $ 701 | $ 1,566
Post-mod outstanding principal balance | 1,440 | 703 | 1,636
Financial impact due to TDR taken as additional provision | $ 0 | $ 50 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 3,000 | 1
Recorded investment of TDR's that defaulted during the period | $ 0 | $ 847 | $ 451
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ 0
SFR 1-4 1st DT liens | Consumer |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 0 | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0 | 3
Recorded investment of TDR's that defaulted during the period | $ 0 | $ 0 | $ 1,180
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ 0
SFR HELOCs and junior liens | Consumer |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 0 | 1 | 2
Pre-mod outstanding principal balance | $ 0 | $ 200 | $ 172
Post-mod outstanding principal balance | 0 | 247 | 169
Financial impact due to TDR taken as additional provision | $ 0 | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 2 | 0 | 2
Recorded investment of TDR's that defaulted during the period | $ 146 | $ 0 | $ 140
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ (90)
Other | Consumer |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Number (in investments) | investmentSecurity | 0 | 0 | 0
Pre-mod outstanding principal balance | $ 0 | $ 0 | $ 0
Post-mod outstanding principal balance | 0 | 0 | 0
Financial impact due to TDR taken as additional provision | $ 0 | $ 0 | $ 0
Number that defaulted during the period (in investment securities) | investmentSecurity | 0 | 0 | 0
Recorded investment of TDR's that defaulted during the period | $ 0 | $ 0 | $ 0
Financial impact due to the default of previous TDR taken as charge-offs or additional provisions | $ 0 | $ 0 | $ 0

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