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Note 15 - Mortgage Banking Activities (Details Textual) $ in Thousands | Sep. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
--- | --- | ---
Loan, Managed and Securitized or Asset-Backed Financing Arrangement, Principal Outstanding | $ 1,750,000 | $ 1,820,000
Measurement Input, Discount Rate [Member] | Minimum [Member] |  |
Servicing Asset, Measurement Input | 0.095 | 0.10
Measurement Input, Discount Rate [Member] | Maximum [Member] |  |
Servicing Asset, Measurement Input | 0.125 | 0.13
Measurement Input, Prepayment Rate [Member] | Minimum [Member] |  |
Servicing Asset, Measurement Input | 0.064 | 0.053
Measurement Input, Prepayment Rate [Member] | Maximum [Member] |  |
Servicing Asset, Measurement Input | 0.113 | 0.105
Measurement Input, Default Rate [Member] |  |
Servicing Asset, Measurement Input | 0.005 | 0.006
Mortgage Servicing Rights [Member] |  |
Servicing Asset at Fair Value, Amount | $ 23,000 | $ 25,000
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance | $ 0 | $ 0

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