Commitments and Credit Risk - Additional Information (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Minimum [Member] | |
| Commitments And Contingencies [Line Items] | |
| Fixed interest rate loan commitments | 4.99% |
| Fixed interest rate loan commitments maturity period | 1 month |
| Maximum [Member] | |
| Commitments And Contingencies [Line Items] | |
| Fixed interest rate loan commitments | 9.19% |
| Fixed interest rate loan commitments maturity period | 62 months |