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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	Jun. 30, 2020 USD ($) Collateral
Financing Receivable, Modifications [Line Items]
Real Estate	$ 5,574
Business Assets	1,411
Other	$ 218
Number of Instruments Dependent on Collateral | Collateral	42
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 231
Business Assets	828
Other	$ 189
Number of Instruments Dependent on Collateral | Collateral	15
Small Business Administration [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 997
Business Assets	583
Other	$ 8
Number of Instruments Dependent on Collateral | Collateral	12
SBA - Paycheck Protection Program (PPP) [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0
Business Assets	0
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	0
Construction [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0
Business Assets	0
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	0
SFR Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 1,080
Business Assets	0
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	4
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0
Business Assets	0
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	0
Municipal Lease Finance Receivables [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0
Business Assets	0
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	0
Consumer and Other Loans [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 268
Business Assets	0
Other	$ 21
Number of Instruments Dependent on Collateral | Collateral	5
Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 2,998
Business Assets	0
Other	$ 0
Number of Instruments Dependent on Collateral | Collateral	6

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Recorded investment in collateral dependent loans on business assets.

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Recorded investment in collateral dependent loans on other financial instruments.

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Recorded investment in collateral dependent loans on real estate.

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