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Note 4 - Loans (Details Textual) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Financing Receivable, Unamortized Loan Cost (Fee) | $ 861,000 |  | $ 181,000
Financing Receivable, Accrued Interest, after Allowance for Credit Loss | 8,220 |  | $ 7,330
Financing Receivable, Nonaccrual, Interest Income | 67,000 | $ 1,000 |
Financing Receivable, Accrued Interest, Writeoff | $ 36,000 | $ 0 |
Financing Receivable, Nonaccrual to Outstanding, Percent | 0.17% |  | 0.00%
Financing Receivable, Allowance for Credit Loss to Outstanding, Percent | 0.69% |  | 0.61%
Mortgage Loans in Process of Foreclosure, Amount | $ 54,000 |  | $ 0
Federal Home Loan Mortgage Corporation and Other Investors [Member] |  |  |
Unpaid Principal Balance Of Loans Serviced For Others | $ 335,100 |  | $ 391,800
Commercial and Industrial Portfolio Segment [Member] | Minimum [Member] |  |  |
Loans and Leases Receivable, Term (Year) | 1 year |  |
Commercial and Industrial Portfolio Segment [Member] | Maximum [Member] |  |  |
Loans and Leases Receivable, Term (Year) | 10 years |  |
Commercial Real Estate Portfolio Segment [Member] | Minimum [Member] |  |  |
Loans and Leases Receivable, Term (Year) | 5 years |  |
Financing Receivable, Periodic Payment Terms, Balloon Payment Period (Year) | 1 year |  |
Financing Receivable, Variable Rates Of Interest, Adjustment Period (Year) | 1 year |  |
Loan And Lease Receivable, Ratio Of Loan To Appraised Value | 0.75 |  |
Commercial Real Estate Portfolio Segment [Member] | Maximum [Member] |  |  |
Loans and Leases Receivable, Term (Year) | 25 years |  |
Financing Receivable, Periodic Payment Terms, Balloon Payment Period (Year) | 10 years |  |
Financing Receivable, Variable Rates Of Interest, Adjustment Period (Year) | 10 years |  |
Loan And Lease Receivable, Ratio Of Loan To Appraised Value | 0.85 |  |
Residential Portfolio Segment [Member] | Home Equity Line-of-credit loans [Member] |  |  |
Financing Receivable, Amortization Period (Year) | 5 years |  |
Residential Portfolio Segment [Member] | Minimum [Member] |  |  |
Financing Receivable, Variable Rates Of Interest, Adjustment Period (Year) | 1 year |  |
Loan And Lease Receivable, Ratio Of Loan To Appraised Value | 0.80 |  |
Financing Receivable, Amortization Period (Year) | 5 years |  |
Residential Portfolio Segment [Member] | Maximum [Member] |  |  |
Financing Receivable, Variable Rates Of Interest, Adjustment Period (Year) | 15 years |  |
Financing Receivable, Amortization Period (Year) | 30 years |  |

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- Definition Percentage of allowance for credit loss to total financing receivable outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph a -Subparagraph (1) -Publisher SEC + Details
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