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Note 8 - Loans - Troubled Debt Restructuring Activity (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Charge-offs |  |
Accruing Troubled Debt Restructuring [Member] |  |
Beginning balance | 65,071 | 68,566
New restructurings | 1,948 | 17,320
Restructured loans restored to accrual status |  | 2,318
Payments | (4,071) | (3,891)
Restructured loans placed on non-accrual status |  | (1,528)
Ending balance | 62,948 | 82,785
Non-accruing Troubled Debt Restructuring [Member] |  |
Beginning balance | 24,189 | 33,415
New restructurings |  | 231
Restructured loans restored to accrual status |  | (2,318)
Payments | (481) | (1,661)
Restructured loans placed on non-accrual status |  | 1,528
Ending balance | 23,301 | 31,195
Charge-offs | $ (407) |

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- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18845-111554 + Details
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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18845-111554 + Details
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