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Basic and Diluted Earnings Per Share (Tables) | 3 Months Ended
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Jul. 31, 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:
|  | Three Months Ended July 31, |
|  | 2015 |  |  | 2014 |
|  | (in thousands, except per share data) |
Net income |  | $ | 23,082 |  |  | $ | 14,533 |
Less: distributed and undistributed earnings to nonvested restricted stockholders |  |  | 224 |  |  |  | — |
Basic net earnings attributable to common stockholders |  |  | 22,858 |  |  |  | 14,533 |
Add: undistributed earnings to nonvested restricted stockholders |  |  | 176 |  |  |  | — |
Less: reallocation of undistributed earnings to nonvested restricted stockholders |  |  | 174 |  |  |  | — |
Diluted net earnings attributable to common stockholders |  |  | 22,860 |  |  |  | 14,533 |
Weighted-average common shares outstanding: |  |  |  |  |  |  |  |
Basic weighted-average number of common shares outstanding |  |  | 49,493 |  |  |  | 48,703 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Restricted stock |  |  | 452 |  |  |  | 756 |
Stock options |  |  | 66 |  |  |  | 132 |
ESPP |  |  | 3 |  |  |  | — |
Diluted weighted-average number of common shares outstanding |  |  | 50,014 |  |  |  | 49,591 |
Net earnings per common share: |  |  |  |  |  |  |  |
Basic earnings per share |  | $ | 0.46 |  |  | $ | 0.30 |
Diluted earnings per share |  | $ | 0.46 |  |  | $ | 0.29 |

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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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