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Note 4 - Earnings Per Share | 3 Months Ended
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Mar. 31, 2016
Earnings Per Share [Abstract] |
Earnings Per Share [Text Block] | 4. Earnings per Share Basic earnings per share excludes dilution and is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock and resulted in the issuance of common stock that then shared in earnings. Outstanding stock options with anti-dilutive effect were not included in the computation of diluted earnings per share. The following table sets forth earnings per common share calculations:
|  | Three months ended March 31, |
(Dollars in thousands, except share and per share data) |  | 2016 |  |  | 2015 |
Net income |  | $ | 46,163 |  |  | $ | 35,980 |
Weighted-average shares: |  |  |  |  |  |  |  |
Basic weighted-average number of common shares outstanding |  |  | 79,734,519 |  |  |  | 79,835,628 |
Dilutive effect of weighted-average outstanding common share equivalents |  |  |  |  |  |  |  |
Warrants |  |  | 452,368 |  |  |  | 344,919 |
Options |  |  | 83,018 |  |  |  | 108,457 |
Restricted stock units |  |  | 123,944 |  |  |  | 20,379 |
Diluted weighted-average number of common shares outstanding |  |  | 80,393,849 |  |  |  | 80,309,383 |
Average stock options and warrants with anti-dilutive effect |  |  | 359,544 |  |  |  | 1,670,231 |
Earnings per common share: |  |  |  |  |  |  |  |
Basic |  | $ | 0.58 |  |  | $ | 0.45 |
Diluted |  | $ | 0.57 |  |  | $ | 0.45 |

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