Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Recorded Investment in Collateral-Dependent loans (Detail) $ in Thousands	Jun. 30, 2025 USD ($) Collateral	Dec. 31, 2024 USD ($) Collateral
Financing Receivable, Modifications [Line Items]
Real Estate	$ 6,140	$ 27,466
Business Assets	161	327
Other	$ 103	$ 0
Number of Loans Dependent on Collateral \| Collateral	9	15
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 4,815	$ 25,866
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral \| Collateral	2	6
SBA [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 1,265	$ 1,529
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral \| Collateral	3	5
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0	$ 11
Business Assets	161	327
Other	$ 103	$ 0
Number of Loans Dependent on Collateral \| Collateral	3	3
Dairy & Livestock and Agribusiness [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 60	$ 60
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral \| Collateral	1	1