Borrowings - Schedule of Borrowing Usage and Interest Rate Information for Federal Funds Purchased and Retail Repurchase Agreements (Detail) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Debt Disclosure [Abstract] | ||
| Average daily balance during the period | $ 43,722 | $ 41,479 |
| Average interest rate during the period | 1.49% | 1.77% |
| Maximum month-end balance year-to-date | $ 42,826 | $ 46,708 |
| Weighted average interest rate at period-end | 1.70% | 1.46% |