Securities - Gross Realized Gains or Losses (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Debt Securities, Available-for-Sale, Realized Gain (Loss) [Abstract] | |||||
| Gross realized gains | $ 0 | $ 0 | $ 0 | $ 0 | |
| Gross realized losses | 0 | $ (347) | 0 | (347) | 0 |
| Net realized losses | 0 | 0 | (347) | 0 | |
| Tax benefit related to net realized losses | $ 0 | $ 0 | $ (73) | $ 0 | |