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Note 5 - DERIVATIVES AND HEDGING ACTIVITIES - Hedged Interest Rate Swaps and Non-hedged Interest Rate Swaps (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2025 | Dec. 31, 2024
Derivative [Line Items] |  |
Swapped loan portfolio loan-to-value percentage, including the potential swap exposure | 65.00% |
Interest rate swaps |  |
Derivative [Line Items] |  |
Interest rate swaps collateralized by investment securities | $ 214,610 | $ 214,892
Interest rate swaps | Cash |  |
Derivative [Line Items] |  |
Interest rate swaps collateralized by investment securities | 41,911 | 39,431
Interest rate swaps | U.S. govt. sponsored agency securities |  |
Derivative [Line Items] |  |
Interest rate swaps collateralized by investment securities | 6,469 | 6,222
Interest rate swaps | Municipal securities |  |
Derivative [Line Items] |  |
Interest rate swaps collateralized by investment securities | 140,958 | 151,107
Interest rate swaps | Residential mortgage-backed and related securities |  |
Derivative [Line Items] |  |
Interest rate swaps collateralized by investment securities | $ 25,272 | $ 18,132

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