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Note 5 - Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Notes Tables |
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) |  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Net income |  | $ | 49,746 |  |  | $ | 46,090 |  |  | $ | 150,102 |  |  | $ | 127,084 |
Weighted-average shares: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted-average number of common shares outstanding |  |  | 80,665,398 |  |  |  | 78,865,860 |  |  |  | 80,073,249 |  |  |  | 79,147,839 |
Dilutive effect of weighted-average outstanding common share equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants |  |  | 399,957 |  |  |  | 569,949 |  |  |  | 409,019 |  |  |  | 520,686 |
Options |  |  | 19,221 |  |  |  | 95,850 |  |  |  | 25,706 |  |  |  | 90,461 |
Restricted stock units |  |  | 320,278 |  |  |  | 165,410 |  |  |  | 289,205 |  |  |  | 143,860 |
Diluted weighted-average number of common shares outstanding |  |  | 81,404,854 |  |  |  | 79,697,069 |  |  |  | 80,797,179 |  |  |  | 79,902,846 |
Average stock options and warrants with anti-dilutive effect |  |  | 0 |  |  |  | 207,183 |  |  |  | 6,561 |  |  |  | 247,974 |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.62 |  |  | $ | 0.58 |  |  | $ | 1.87 |  |  | $ | 1.61 |
Diluted |  | $ | 0.61 |  |  | $ | 0.58 |  |  | $ | 1.86 |  |  | $ | 1.59 |

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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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