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Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Recorded Investment in Collateral-Dependent loans (Detail) $ in Thousands | Sep. 30, 2023 USD ($) Collateral | Dec. 31, 2022 USD ($) Collateral
--- | --- | ---
Financing Receivable, Modifications [Line Items] |  |
Real Estate | $ 5,355 | $ 18,475
Business Assets | 3,324 | 5,066
Other | $ 1,284 | $ 289
Number of Loans Dependent on Collateral | Collateral | 25 | 28
Commercial Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Real Estate | $ 3,655 | $ 17,935
Number of Loans Dependent on Collateral | Collateral | 5 | 4
SBA [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Real Estate | $ 830 | $ 151
Business Assets | $ 220 | $ 292
Number of Loans Dependent on Collateral | Collateral | 5 | 6
Commercial and Industrial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Real Estate | $ 401 | $ 87
Business Assets | 3,104 | 2,774
Other | $ 1,167 | $ 81
Number of Loans Dependent on Collateral | Collateral | 10 | 13
Dairy & Livestock and Agribusiness [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Real Estate | $ 130 | $ 269
Business Assets |  | 2,000
Other | $ 113 | $ 208
Number of Loans Dependent on Collateral | Collateral | 3 | 4
SFR Mortgage [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Real Estate | $ 339 |
Consumer and Other Loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Real Estate |  | $ 33
Other | $ 4 |
Number of Loans Dependent on Collateral | Collateral | 1 | 1

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