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Note 9 - Loans - Impaired Loans and Related Allowance for Credit Losses (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Loans with no related allowance, unpaid principal balance | $ 89,224 | $ 74,673
Loans with no related allowance, recorded investment | 62,388 | 54,140
Loans with related allowance, unpaid principal balance | 12,511 | 16,539
Loans with related allowance, recorded investment | 11,192 | 14,714
Allowance | 4,258 | 3,941
Unpaid principal balance | 101,735 | 91,212
Recorded investment | 73,580 | 68,854
Commercial Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 27,401 | 27,341
Loans with no related allowance, recorded investment | 10,887 | 12,949
Loans with related allowance, unpaid principal balance | 12,511 | 14,643
Loans with related allowance, recorded investment | 11,192 | 12,823
Allowance | 4,258 | 3,734
Commercial Real Estate Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 49,927 | 37,697
Loans with no related allowance, recorded investment | 40,218 | 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 | 11,896 | 9,626
Loans with no related allowance, recorded investment | $ 11,283 | 8,978
Installment and Other Loans [Member ] |  |
Loans with no related allowance, unpaid principal balance |  | 9
Loans with no related allowance, recorded investment |  | $ 8

X
- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-14A + Details
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