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Note 15 - Mortgage Banking Activities (Details Textual) $ in Thousands | Mar. 31, 2026 USD ($) | Dec. 31, 2025 USD ($)
--- | --- | ---
Loan, Managed and Securitized or Asset-Backed Financing Arrangement, Principal Outstanding | $ 1,710,000 | $ 1,730,000
Measurement Input, Discount Rate [Member] | Minimum [Member] |  |
Servicing Asset, Measurement Input | 0.095 | 0.095
Measurement Input, Discount Rate [Member] | Maximum [Member] |  |
Servicing Asset, Measurement Input | 0.125 | 0.125
Measurement Input, Prepayment Rate [Member] | Minimum [Member] |  |
Servicing Asset, Measurement Input | 0.075 | 0.068
Measurement Input, Prepayment Rate [Member] | Maximum [Member] |  |
Servicing Asset, Measurement Input | 0.102 | 0.118
Measurement Input, Default Rate [Member] |  |
Servicing Asset, Measurement Input | 0.006 | 0.005
Mortgage Servicing Rights [Member] |  |
Mortgage servicing rights | $ 23,000 | $ 22,000
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance | $ 0 | $ 0

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