Note 15 - Related Party Transactions (Details Textual) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | $ 3,309,459 | $ 3,314,301 |
| Executive Officers, Directors and their Related Interests [Member] | ||
| Unfunded Loan Commitments, Available To Related Parties | 0 | 0 |
| Principal Officers, Directors and their Affiliates [Member] | ||
| Related Party Deposit Liabilities | $ 64,200 | 73,000 |
| Directors and Their Affiliates [Member] | ||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss | $ 6,000 |