Note 7 - Derivatives (Details Textual) - USD ($) |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 16, 2023 |
Mar. 31, 2025 |
Mar. 31, 2024 |
Dec. 31, 2024 |
|
| Interest Income (Expense), Operating | $ 18,822,000 | $ 18,161,000 | ||
| Other Noninterest Income [Member] | ||||
| Back-to-Back Swap Fee Income | 0 | |||
| Residential Portfolio Segment [Member] | ||||
| Derivative, Notional Amount | 299,000 | |||
| Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Fair Value, Cumulative Increase (Decrease), Excluded from Amortized Cost | 436,400,000 | |||
| Hedged Asset, Fair Value Hedge, Portfolio Layer Method, Hedged Layer, Fair Value, Cumulative Increase (Decrease) | 58,000 | $ (525,000) | ||
| Fair Value Hedging [Member] | ||||
| Derivative, Term of Contract (Year) | 3 years | |||
| Derivative, Notional Amount | $ 300,000,000 | |||
| Derivative, Fixed Interest Rate | 3.82% | |||
| Interest Income (Expense), Operating | $ 356,000 | |||