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Note 7 - Loans Receivable and Credit Disclosures - Troubled Debt Restructurings (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($)
Financing receivable modifications, number of contracts | 1 | 5 | 5 | 7
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 6 | $ 10,240 | $ 642 | $ 10,485
Financing receivable modifications, post modification outstanding, recorded investment | $ 6 | $ 10,240 | $ 642 | $ 10,485
Construction Real Estate [Member] |  |  |  |
Financing receivable modifications, number of contracts | 0 | 0 | 0 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Family Residential Real Estate 1-4 [Member] |  |  |  |
Financing receivable modifications, number of contracts | 0 | 0 | 3 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 0 | $ 578 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 0 | $ 578 | $ 0
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Financing receivable modifications, number of contracts | 0 | 1 | 0 | 2
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 10,157 | $ 0 | $ 10,341
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 10,157 | $ 0 | $ 10,341
Agriculture Real Estate [Member] |  |  |  |
Financing receivable modifications, number of contracts | 0 | 0 | 0 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 0 | $ 0 | $ 0
Commercial Portfolio Segment [Member] |  |  |  |
Financing receivable modifications, number of contracts | 1 | 0 | 2 | 1
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 6 | $ 0 | $ 64 | $ 61
Financing receivable modifications, post modification outstanding, recorded investment | $ 6 | $ 0 | $ 64 | $ 61
Agriculture [Member] |  |  |  |
Financing receivable modifications, number of contracts | 0 | 3 | 0 | 3
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 56 | $ 0 | $ 56
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 56 | $ 0 | $ 56
Consumer and Other [Member] |  |  |  |
Financing receivable modifications, number of contracts | 0 | 1 | 0 | 1
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 27 | $ 0 | $ 27
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 27 | $ 0 | $ 27

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