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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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Number Of Instruments Dependent On Collateral.

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- Definition

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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