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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 | 3 Months Ended
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Mar. 31, 2022 USD ($) Agreement | Mar. 31, 2021 USD ($) Agreement
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Troubled debt restructurings, Number of Loans | Agreement | [1] | 0 | 2
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | [1] | $ 0 | $ 4,643
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | [1] | 0 | 4,643
Troubled debt restructurings, Outstanding Recorded Investment | [1] | 0 | 4,443
Troubled debt restructurings, Financial Effect Resulting From Modifications | [1],[2] | $ 0 | $ 0
Commercial Real Estate Owner Occupied [Member] | Interest rate reduction [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Troubled debt restructurings, Number of Loans | Agreement | [1] | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | [1] | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | [1] | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | [1] | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | [1],[2] | $ 0 | $ 0
Commercial Real Estate Owner Occupied [Member] | Change in Amortization Period [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Troubled debt restructurings, Number of Loans | Agreement | [1] | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | [1] | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | [1] | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | [1] | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | [1],[2] | $ 0 | $ 0
Commercial and Industrial Loans [Member] | Interest rate reduction [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Troubled debt restructurings, Number of Loans | Agreement | [1] | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | [1] | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | [1] | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | [1] | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | [1],[2] | $ 0 | $ 0
Commercial and Industrial Loans [Member] | Change in Amortization Period [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Troubled debt restructurings, Number of Loans | Agreement | [1] | 0 | 2
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | [1] | $ 0 | $ 4,643
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | [1] | 0 | 4,643
Troubled debt restructurings, Outstanding Recorded Investment | [1] | 0 | 4,443
Troubled debt restructurings, Financial Effect Resulting From Modifications | [1],[2] | $ 0 | $ 0
SFR Mortgage [Member] | Interest rate reduction [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Troubled debt restructurings, Number of Loans | Agreement | [1] | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | [1] | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | [1] | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | [1] | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | [1],[2] | $ 0 | $ 0
SFR Mortgage [Member] | Change in Amortization Period [Member] |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |
Troubled debt restructurings, Number of Loans | Agreement | [1] | 0 | 0
Troubled debt restructurings, Pre-Modification Outstanding Recorded Investment | [1] | $ 0 | $ 0
Troubled debt restructurings, Post-Modification Outstanding Recorded Investment | [1] | 0 | 0
Troubled debt restructurings, Outstanding Recorded Investment | [1] | 0 | 0
Troubled debt restructurings, Financial Effect Resulting From Modifications | [1],[2] | $ 0 | $ 0
[1] | The tables above exclude modified loans that were paid off prior to the end of the period.
[2] | Financial effects resulting from modifications represent charge-offs and current allowance for credit losses at modification date.

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