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Note 4 - Loan Receivables and Allowance for Loan and Lease Losses - Impaired Loans (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Impaired loans, related allowance | $ 1,900,000 |  | $ 1,400,000
Impaired loans, recorded investment | 29,000,000 |  | 24,400,000
With no allowance recorded, average recorded investment | 14,016,000 | $ 9,978,000 |
With no allowance recorded, interest income recognized | 65,000 | 29,000 |
With allowance recorded, average recorded investment | 9,512,000 | 8,887,000 |
With allowance recorded, interest income recognized | 31,000 | 4,000 |
Impaired Loans, Average recorded investment | 23,528,000 | 18,865,000 |
Impaired Loans, interest income recognized | 96,000 | 33,000 |
Business Activities Loans [Member] |  |  |
Impaired loans with no related allowance recorded, recorded investment | 17,689,000 |  | 15,453,000
Impaired loans with no related allowance recorded, unpaid principal balance | 18,828,000 |  | 16,692,000
Impaired loans with a related allowance recorded, recorded investment | 11,275,000 |  | 8,930,000
Impaired loans with a related allowance recorded, unpaid principal balance | 11,539,000 |  | 8,930,000
Impaired loans, related allowance | 1,926,000 |  | 1,412,000
Impaired loans, recorded investment | 28,964,000 |  | 24,383,000
Impaired loans, unpaid principal balance | 30,367,000 |  | 25,622,000
Commercial Real Estate Portfolio Segment [Member] |  |  |
With no allowance recorded, average recorded investment | 6,078,000 | 3,467,000 |
With no allowance recorded, interest income recognized |  |  |
With allowance recorded, average recorded investment | 8,813,000 | 8,808,000 |
With allowance recorded, interest income recognized |  | 1,000 |
Impaired Loans, Average recorded investment | 14,891,000 | 12,275,000 |
Impaired Loans, interest income recognized |  | 1,000 |
Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |
Impaired loans with no related allowance recorded, recorded investment | 8,214,000 |  | 5,723,000
Impaired loans with no related allowance recorded, unpaid principal balance | 9,135,000 |  | 6,644,000
Impaired loans with a related allowance recorded, recorded investment | 8,820,000 |  | 8,811,000
Impaired loans with a related allowance recorded, unpaid principal balance | 8,820,000 |  | 8,811,000
Impaired loans, related allowance | 1,415,000 |  | 1,398,000
Impaired loans, recorded investment | 17,034,000 |  | 14,534,000
Impaired loans, unpaid principal balance | 17,955,000 |  | 15,455,000
Residential Portfolio Segment [Member] |  |  |
With no allowance recorded, average recorded investment | 4,248,000 | 3,578,000 |
With no allowance recorded, interest income recognized | 13,000 | 20,000 |
With allowance recorded, average recorded investment | 190,000 | 28,000 |
With allowance recorded, interest income recognized | 3,000 | 2,000 |
Impaired Loans, Average recorded investment | 4,438,000 | 3,606,000 |
Impaired Loans, interest income recognized | 16,000 | 22,000 |
Residential Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |
Impaired loans with no related allowance recorded, recorded investment | 4,138,000 |  | 3,853,000
Impaired loans with no related allowance recorded, unpaid principal balance | 4,212,000 |  | 3,900,000
Impaired loans with a related allowance recorded, recorded investment | 435,000 |  | 109,000
Impaired loans with a related allowance recorded, unpaid principal balance | 452,000 |  | 109,000
Impaired loans, related allowance | 8,000 |  | 4,000
Impaired loans, recorded investment | 4,573,000 |  | 3,962,000
Impaired loans, unpaid principal balance | 4,664,000 |  | 4,009,000
Commercial Portfolio Segment [Member] |  |  |
With no allowance recorded, average recorded investment | 2,745,000 | 2,082,000 |
With no allowance recorded, interest income recognized | 46,000 | 1,000 |
With allowance recorded, average recorded investment | 462,000 |  |
With allowance recorded, interest income recognized | 26,000 |  |
Impaired Loans, Average recorded investment | 3,207,000 | 2,082,000 |
Impaired Loans, interest income recognized | 72,000 | 1,000 |
Commercial Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |
Impaired loans with no related allowance recorded, recorded investment | 4,684,000 |  | 4,700,000
Impaired loans with no related allowance recorded, unpaid principal balance | 4,803,000 |  | 4,816,000
Impaired loans with a related allowance recorded, recorded investment | 1,848,000 |  |
Impaired loans with a related allowance recorded, unpaid principal balance | 2,063,000 |  |
Impaired loans, related allowance | 501,000 |  |
Impaired loans, recorded investment | 6,532,000 |  | 4,700,000
Impaired loans, unpaid principal balance | 6,866,000 |  | 4,816,000
Consumer Portfolio Segment [Member] |  |  |
With no allowance recorded, average recorded investment | 945,000 | 851,000 |
With no allowance recorded, interest income recognized | 6,000 | 8,000 |
With allowance recorded, average recorded investment | 47,000 | 51,000 |
With allowance recorded, interest income recognized | 2,000 | 1,000 |
Impaired Loans, Average recorded investment | 992,000 | 902,000 |
Impaired Loans, interest income recognized | 8,000 | 9,000 |
Consumer Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |
Impaired loans with no related allowance recorded, recorded investment | 653,000 |  | 1,177,000
Impaired loans with no related allowance recorded, unpaid principal balance | 678,000 |  | 1,332,000
Impaired loans with a related allowance recorded, recorded investment | 172,000 |  | 10,000
Impaired loans with a related allowance recorded, unpaid principal balance | 204,000 |  | 10,000
Impaired loans, related allowance | 2,000 |  | 10,000
Impaired loans, recorded investment | 825,000 |  | 1,187,000
Impaired loans, unpaid principal balance | 882,000 |  | $ 1,342,000
Construction Portfolio Segment [Member] |  |  |
With no allowance recorded, average recorded investment |  |  |
With no allowance recorded, interest income recognized |  |  |

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