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Note 5 - Earnings per Share (Tables) | 9 Months Ended
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Sep. 30, 2015
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
(Dollars in thousands, except share and per share data) |  | 2015 |  |  | 2014 |  |  | 2015 |  |  | 2014 |
Net income |  | $ | 38,483 |  |  | $ | 35,909 |  |  | $ | 119,663 |  |  | $ | 102,252 |
Weighted-average shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted-average number of common shares outstanding |  |  | 81,475,288 |  |  |  | 79,677,952 |  |  |  | 80,422,711 |  |  |  | 79,639,202 |
Dilutive effect of weighted-average outstanding common share equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants |  |  | 606,803 |  |  |  | 346,101 |  |  |  | 507,002 |  |  |  | 306,306 |
Options |  |  | 123,910 |  |  |  | 109,803 |  |  |  | 124,135 |  |  |  | 103,022 |
Restricted stock units |  |  | 79,477 |  |  |  | 42,244 |  |  |  | 51,343 |  |  |  | 39,289 |
Diluted weighted-average number of common shares outstanding |  |  | 82,285,478 |  |  |  | 80,176,100 |  |  |  | 81,105,191 |  |  |  | 80,087,819 |
Average stock options and warrants with anti-dilutive effect |  |  | 760,291 |  |  |  | 1,990,358 |  |  |  | 1,082,400 |  |  |  | 1,993,384 |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.47 |  |  | $ | 0.45 |  |  | $ | 1.49 |  |  | $ | 1.28 |
Diluted |  | $ | 0.47 |  |  | $ | 0.45 |  |  | $ | 1.48 |  |  | $ | 1.28 |

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- References No definition available. + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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