Loans and Allowance for Credit Losses - Schedule of Loan Delinquency for Recreation and Home Improvement Loans (Parenthetical) (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Receivables [Abstract] | ||
| Capitalized recreation loan origination costs | $ 55.1 | $ 50.7 |
| Capitalized home improvement loan origination costs | $ 2.9 | $ 3.9 |