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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, 2025 USD ($) Collateral	Dec. 31, 2024 USD ($) Collateral
Financing Receivable, Modifications [Line Items]
Real Estate	$ 8,095	$ 27,466
Business Assets	144	327
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	7	15
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 4,143	$ 25,866
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	1	6
SBA [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 3,952	$ 1,529
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	4	5
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0	$ 11
Business Assets	144	327
Other	$ 0	$ 0
Number of Loans Dependent on Collateral | Collateral	2	3
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Modifications [Line Items]
Real Estate		$ 60
Business Assets		0
Other		$ 0
Number of Loans Dependent on Collateral | Collateral		1

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- Definition

Number Of Instruments Dependent On Collateral.

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- Definition

Pledged Assets Not Separately Reported On Statement Of Financial Position [LineItems].

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- Definition

Recorded investment in collateral dependent loans on business assets.

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No definition available.

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- Definition

Recorded investment in collateral dependent loans on other financial instruments.

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No definition available.

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- Definition

Recorded investment in collateral dependent loans on real estate.

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No definition available.

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