Note 4 - Securities - Debt Securities, Available-for-Sale (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Sale proceeds | $ 430,285,000 | $ 76,002,000 | $ 430,285,000 | $ 137,499,000 |
| Gross realized losses | 148,000 | (7,812,000) | 148,000 | (16,375,000) |
| Net realized loss | $ 148,000 | $ (7,812,000) | $ 148,000 | $ (16,375,000) |
| X | ||||||||||
- Definition Amount of cash inflow from sale and calls of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). No definition available.
|
| X | ||||||||||
- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|