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Note 5 - Loans - Nonaccrual Loans and Related Allowance for Credit Losses (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Loans with no related allowance, unpaid principal balance | $ 88,728 | $ 74,673
Loans with no related allowance, recorded investment | 66,681 | 54,140
Loans with related allowance, unpaid principal balance | 0 | 16,539
Loans with related allowance, recorded investment | 0 | 14,714
Allowance | 0 | 3,941
Unpaid principal balance | 88,728 | 91,212
Non-accrual loans | 66,681 | 68,854
Commercial Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 26,310 | 27,341
Loans with no related allowance, recorded investment | 14,404 | 12,949
Loans with related allowance, unpaid principal balance | 0 | 14,643
Loans with related allowance, recorded investment | 0 | 12,823
Allowance | 0 | 3,734
Real Estate Construction Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 7,736 |
Loans with no related allowance, recorded investment | 7,736 |
Commercial Real Estate Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 41,725 | 37,697
Loans with no related allowance, recorded investment | 32,030 | 32,205
Loans with related allowance, unpaid principal balance | 0 | 1,896
Loans with related allowance, recorded investment | 0 | 1,891
Allowance | 0 | 207
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 12,957 | 9,626
Loans with no related allowance, recorded investment | 12,511 | 8,978
Loans with related allowance, unpaid principal balance | 0 |
Loans with related allowance, recorded investment | 0 |
Allowance | 0 |
Installment and Other Loans [Member ] |  |
Loans with no related allowance, unpaid principal balance | 0 | 9
Loans with no related allowance, recorded investment | $ 0 | $ 8

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