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Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Loans Modified as Troubled Debt Restructurings (Detail) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) Agreement | Dec. 31, 2021 USD ($) Agreement
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructurings, Number of Loans | Agreement | 3 | 4
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 5,204 | $ 7,340
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 5,204 | 7,340
Troubled debt restructurings, Outstanding Recorded Investment | 5,204 | 4,253
Troubled debt restructurings, Financial Effect Resulting From Modifications |  |
Commercial Real Estate Owner Occupied [Member] | Interest rate reduction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructurings, Number of Loans | Agreement |  | 1
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment |  | $ 2,453
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment |  | 2,453
Troubled debt restructurings, Outstanding Recorded Investment |  | 2,394
Troubled debt restructurings, Financial Effect Resulting From Modifications |  |
Commercial Real Estate Owner Occupied [Member] | Change in Amortization Period or Maturity [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructurings, Number of Loans | Agreement |  |
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment |  |
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment |  |
Troubled debt restructurings, Outstanding Recorded Investment |  |
Troubled debt restructurings, Financial Effect Resulting From Modifications |  |
Commercial and Industrial [Member] | Interest rate reduction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructurings, Number of Loans | Agreement |  |
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment |  |
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment |  |
Troubled debt restructurings, Outstanding Recorded Investment |  |
Troubled debt restructurings, Financial Effect Resulting From Modifications |  |
Commercial and Industrial [Member] | Change in Amortization Period or Maturity [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructurings, Number of Loans | Agreement | 2 | 3
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 3,204 | $ 4,887
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 3,204 | 4,887
Troubled debt restructurings, Outstanding Recorded Investment | 3,204 | 1,859
Troubled debt restructurings, Financial Effect Resulting From Modifications |  |
Dairy & Livestock and Agribusiness [Member] | Interest rate reduction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructurings, Number of Loans | Agreement | 1 |
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | $ 2,000 |
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | 2,000 |
Troubled debt restructurings, Outstanding Recorded Investment | 2,000 |
Troubled debt restructurings, Financial Effect Resulting From Modifications |  |
Dairy & Livestock and Agribusiness [Member] | Change in Amortization Period or Maturity [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructurings, Number of Loans | Agreement |  |
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment |  |
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment |  |
Troubled debt restructurings, Outstanding Recorded Investment |  |
Troubled debt restructurings, Financial Effect Resulting From Modifications |  |
SFR Mortgage [Member] | Interest rate reduction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructurings, Number of Loans | Agreement |  |
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment |  |
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment |  |
Troubled debt restructurings, Outstanding Recorded Investment |  |
Troubled debt restructurings, Financial Effect Resulting From Modifications |  |
SFR Mortgage [Member] | Change in Amortization Period or Maturity [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Troubled debt restructurings, Number of Loans | Agreement |  |
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment |  |
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment |  |
Troubled debt restructurings, Outstanding Recorded Investment |  |
Troubled debt restructurings, Financial Effect Resulting From Modifications |  |

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