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Note 7 - Loans - Troubled Debt Restructuring Activity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Accruing Troubled Debt Restructuring [Member] |  |  |  |
Beginning balance | $ 74,708 | $ 100,011 | $ 81,680 | $ 104,355
New restructurings | 18,347 | 427 | 20,412 | 16,853
Restructured loans restored to accrual status |  | 723 | 10,303 | 723
Charge-offs |  |  |  | (148)
Payments | (6,500) | (11,280) | (9,816) | (21,714)
Restructured loans placed on non-accrual status |  |  | (1,138) | (10,188)
Expiration of loan concession upon renewal |  |  | (14,886) |
Ending balance | 86,555 | 89,881 | 86,555 | 89,881
Non-accruing Troubled Debt Restructuring [Member] |  |  |  |
Beginning balance | 25,442 | 42,595 | 39,923 | 41,618
New restructurings | 649 | 1,796 | 3,794 | 2,006
Restructured loans restored to accrual status |  |  | 1,138 | 10,188
Charge-offs | (3,407) | (3) | (4,352) | (3,246)
Payments | (1,814) | (1,859) | (9,330) | (8,037)
Restructured loans placed on non-accrual status |  | (723) | (10,303) | (723)
Ending balance | 20,870 | 41,806 | 20,870 | 41,806
Charge-offs |  |  |  | $ (148)

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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Recorded Investment -URI http://asc.fasb.org/extlink&oid=65880944 + Details
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