Loans and Lease Finance Receivables and Allowance for Credit Losses - Summary of Recorded Investment in Collateral-Dependent loans (Detail) $ in Thousands	Jun. 30, 2026 USD ($) Collateral	Dec. 31, 2025 USD ($) Collateral
Financing Receivable, Modifications [Line Items]
Real Estate	$ 7,167	$ 4,164
Business Assets	2,496	477
Other	$ 7,728	$ 0
Number of Loans Dependent on Collateral \| Collateral	39	5
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 5,101	$ 4,143
Business Assets	0	0
Other	$ 0	$ 0
Number of Loans Dependent on Collateral \| Collateral	6	1
Construction Loans [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 685
Business Assets	0
Other	$ 0
Number of Loans Dependent on Collateral \| Collateral	1
SBA [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 919	$ 21
Business Assets	0	0
Other	$ 1,002	$ 0
Number of Loans Dependent on Collateral \| Collateral	7	1
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 0	$ 0
Business Assets	2,496	477
Other	$ 6,726	$ 0
Number of Loans Dependent on Collateral \| Collateral	24	3
Consumer and Other Loans [Member]
Financing Receivable, Modifications [Line Items]
Real Estate	$ 462
Business Assets	0
Other	$ 0
Number of Loans Dependent on Collateral \| Collateral	1