Securities - Schedule of Net Gains and Losses on Equity Investments Recognized in Earnings and Portion of Unrealized Gains and Losses for Period that Relates to Equity Investments (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Investments, Debt and Equity Securities [Abstract] | ||||
| Net gains (losses) recognized on equity securities during the period | $ 140 | $ (74) | $ 173 | $ (103) |
| Less: Net gains (losses) realized on the sale of equity securities during the period | 0 | 0 | 0 | 0 |
| Unrealized gains (losses) recognized on equity securities held at reporting date | $ 140 | $ (74) | $ 173 | $ (103) |