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Note 4 - Earnings Per Share (Tables) | 3 Months Ended
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Mar. 31, 2017
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three months ended March 31, |
(Dollars in thousands, except share and per share data) |  | 2017 |  |  | 2016 |
Net income |  | $ | 48,941 |  |  | $ | 46,163 |
Weighted-average shares: |  |  |  |  |  |  |  |
Basic weighted-average number of common shares outstanding |  |  | 79,703,593 |  |  |  | 79,734,519 |
Dilutive effect of weighted-average outstanding common share equivalents |  |  |  |  |  |  |  |
Warrants |  |  | 416,607 |  |  |  | 452,368 |
Options |  |  | 33,888 |  |  |  | 83,018 |
Restricted stock units |  |  | 259,090 |  |  |  | 123,944 |
Diluted weighted-average number of common shares outstanding |  |  | 80,413,178 |  |  |  | 80,393,849 |
Average stock options and warrants with anti-dilutive effect |  |  | 19,900 |  |  |  | 359,544 |
Earnings per common share: |  |  |  |  |  |  |  |
Basic |  | $ | 0.61 |  |  | $ | 0.58 |
Diluted |  | $ | 0.61 |  |  | $ | 0.57 |

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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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