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Basic and Diluted (Loss) Earnings Per Share (Tables) | 9 Months Ended
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Jan. 31, 2016
Basic and Diluted (Loss) Earnings per Common Share Attributable to Common Stockholders | The following table summarizes basic and diluted (loss) earnings per common share attributable to common stockholders:
|  | Three Months Ended January 31, |  |  | Nine Months Ended January 31, |
|  | 2016 |  |  | 2015 |  |  | 2016 |  |  | 2015 |
|  | (in thousands, except per share data) |
Net (loss) income |  | $ | (15,995 | ) |  | $ | 22,939 |  |  | $ | 25,058 |  |  | $ | 62,875 |
Less: distributed and undistributed earnings to nonvested restricted stockholders |  |  | 54 |  |  |  | 223 |  |  |  | 235 |  |  |  | 632 |
Basic net (loss) earnings attributable to common stockholders |  |  | (16,049 | ) |  |  | 22,716 |  |  |  | 24,823 |  |  |  | 62,243 |
Add: undistributed earnings to nonvested restricted stockholders |  |  | — |  |  |  | 223 |  |  |  | 83 |  |  |  | 632 |
Less: reallocation of undistributed earnings to nonvested restricted stockholders |  |  | — |  |  |  | 220 |  |  |  | 82 |  |  |  | 623 |
Diluted net (loss) earnings attributable to common stockholders |  | $ | (16,049 | ) |  | $ | 22,719 |  |  | $ | 24,824 |  |  | $ | 62,252 |
Weighted-average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted-average number of common shares outstanding |  |  | 54,003 |  |  |  | 49,135 |  |  |  | 51,159 |  |  |  | 48,973 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock |  |  | — |  |  |  | 491 |  |  |  | 459 |  |  |  | 578 |
Stock options |  |  | — |  |  |  | 97 |  |  |  | 53 |  |  |  | 111 |
ESPP |  |  | — |  |  |  | 1 |  |  |  | 12 |  |  |  | 1 |
Diluted weighted-average number of common shares outstanding |  |  | 54,003 |  |  |  | 49,724 |  |  |  | 51,683 |  |  |  | 49,663 |
Net (loss) earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (loss) earnings per share |  | $ | (0.30 | ) |  | $ | 0.46 |  |  | $ | 0.49 |  |  | $ | 1.27 |
Diluted (loss) earnings per share |  | $ | (0.30 | ) |  | $ | 0.46 |  |  | $ | 0.48 |  |  | $ | 1.25 |

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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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