Loans and Lease Finance Receivables and Allowance for Credit Losses - Schedule of Recorded Investment in, and Aging of, Past Due and Nonaccrual Loans, Including PCI Loans by Class of Loans (Parenthetical) (Detail) - USD ($)
$ in Thousands

Jun. 30, 2026

Dec. 31, 2025

Accounts, Notes, Loans and Financing Receivable [Line Items]

Nonaccruing loans, current

$ 6,700

16,642

^[1],[2]

$ 4,685

^[3],[4]

Accounts, Notes, Loans and Financing Receivable [Line Items]

918

^[1],[2]

21

^[3],[4]

Nonaccrual loans

3,000

3,000

30-59 Days Past Due [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

670,000

60-89 Days Past Due [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

1,400

90+ Days Past Due [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

$ 7,800

$ 4,700

[1]	As of June 30, 2026, $6.7 million of nonaccruing loans were current, $670,000 were 30-59 days past due, $1.4 million were 60-89 days past due, and $7.8 million were 90+ days past due.
[2]	Excludes $3,000 of guaranteed portion of nonaccrual SBA loans that are in process of collection.
[3]	As of December 31, 2025, $4.7 million were 90+ days past due.
[4]	Excludes $3,000 of guaranteed portion of nonaccrual SBA loans that are in process of collection.