Note 9 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Investments in Affordable Housing and Alternative Energy Partnerships | $ 84,800 | $ 89,300 |
| Commitments To Extend Notional Amount | 4,115,612 | 3,809,999 |
| Commitments to Fund Fixed Rate Loans | 54,300 | 48,400 |
| Commitments to Fund Adjustable Rate Loans | $ 4,060,000 | $ 3,760,000 |