Note 4 - Allowance for Credit Losses (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 14,698 | $ 14,735 | $ 14,719 | $ 16,400 |
| Financing Receivable, Excluding Accrued Interest, Modified, Subsequent Default | 0 | 0 | ||
| Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) | 56 | 104 | ||
| Off-Balance-Sheet, Credit Loss, Liability | 571 | $ 590 | ||
| TDR Loans [Member] | ||||
| Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | 0 | 0 | ||
| Collateral Pledged [Member] | ||||
| Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 0 | $ 0 | ||