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Note 7 - Loans - Aging of Troubled Debt Restructurings (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Loans current and past due less than 30 days | $ 1,149,054 | $ 1,166,748
Nonaccrual loans | 12,309 | 9,218
Financing Receivables 30 to 89 Days Past Due [Member] |  |
Loans past due | 13,053 | 10,023
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans past due | 5,366 | 5,451
Troubled Debt Restructuring [Member] |  |
Loans current and past due less than 30 days | 176 | 889
Nonaccrual loans | 1,730 | 1,737
Troubled debt restructurings | 2,102 | 2,626
Troubled Debt Restructuring [Member] | Financing Receivables 30 to 89 Days Past Due [Member] |  |
Loans past due | 196 | 0
Troubled Debt Restructuring [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans past due | $ 0 | $ 0

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