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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 | Dec. 31, 2020 USD ($) Collateral
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Financing Receivable, Modifications [Line Items] |
Real Estate | $ 10,712
Business Assets | 6,653
Other | $ 280
Number of Loans Dependent on Collateral | Collateral | 41
Commercial Real Estate [Member] |
Financing Receivable, Modifications [Line Items] |
Real Estate | $ 7,883
Business Assets | 0
Other | $ 0
Number of Loans Dependent on Collateral | Collateral | 8
Construction [Member] |
Financing Receivable, Modifications [Line Items] |
Real Estate | $ 0
Business Assets | 0
Other | $ 0
Number of Loans Dependent on Collateral | Collateral | 0
Small Business Administration Loans [Member] |
Financing Receivable, Modifications [Line Items] |
Real Estate | $ 1,761
Business Assets | 326
Other | $ 185
Number of Loans Dependent on Collateral | Collateral | 10
SBA - Paycheck Protection Program (PPP) [Member] |
Financing Receivable, Modifications [Line Items] |
Real Estate | $ 0
Business Assets | 0
Other | $ 0
Number of Loans Dependent on Collateral | Collateral | 0
Commercial And Industrial [Member] |
Financing Receivable, Modifications [Line Items] |
Real Estate | $ 470
Business Assets | 5,542
Other | $ 95
Number of Loans Dependent on Collateral | Collateral | 18
Dairy & Livestock and Agribusiness [Member] |
Financing Receivable, Modifications [Line Items] |
Real Estate | $ 0
Business Assets | 785
Other | $ 0
Number of Loans Dependent on Collateral | Collateral | 1
Municipal Lease Finance Receivables [Member] |
Financing Receivable, Modifications [Line Items] |
Real Estate | $ 0
Business Assets | 0
Other | $ 0
Number of Loans Dependent on Collateral | Collateral | 0
SFR mortgage [Member] |
Financing Receivable, Modifications [Line Items] |
Real Estate | $ 430
Business Assets | 0
Other | $ 0
Number of Loans Dependent on Collateral | Collateral | 2
Consumer And Other Loans [Member] |
Financing Receivable, Modifications [Line Items] |
Real Estate | $ 168
Business Assets | 0
Other | $ 0
Number of Loans Dependent on Collateral | Collateral | 2

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