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Basic and Diluted Earnings Per Share (Tables) | 12 Months Ended
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Apr. 30, 2015
Basic and Diluted Earnings per Common Share Attributable to Common Stockholders | The following table summarizes basic and diluted earnings per common share attributable to common stockholders:
|  | Year Ended April 30, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
|  | (in thousands, except per share data) |
Net income |  | $ | 88,357 |  |  | $ | 72,691 |  |  | $ | 33,293 |
Less: distributed and undistributed earnings to nonvested restricted stockholders |  |  | 860 |  |  |  | — |  |  |  | — |
Basic net earnings attributable to common stockholders |  |  | 87,497 |  |  |  | 72,691 |  |  |  | 33,293 |
Add: undistributed earnings to nonvested restricted stockholders |  |  | 815 |  |  |  | — |  |  |  | — |
Less: reallocation of undistributed earnings to nonvested restricted stockholders |  |  | 804 |  |  |  | — |  |  |  | — |
Diluted net earnings attributable to common stockholders |  | $ | 87,508 |  |  | $ | 72,691 |  |  | $ | 33,293 |
Weighted-average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted-average number of common shares outstanding |  |  | 49,052 |  |  |  | 48,162 |  |  |  | 47,224 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock |  |  | 605 |  |  |  | 789 |  |  |  | 485 |
Stock options |  |  | 105 |  |  |  | 194 |  |  |  | 174 |
ESPP |  |  | 4 |  |  |  | — |  |  |  | — |
Diluted weighted-average number of common shares outstanding |  |  | 49,766 |  |  |  | 49,145 |  |  |  | 47,883 |
Net earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 1.78 |  |  | $ | 1.51 |  |  | $ | 0.71 |
Diluted earnings per share |  | $ | 1.76 |  |  | $ | 1.48 |  |  | $ | 0.70 |

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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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