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Stockholders' Equity (Tables) | 3 Months Ended
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Jul. 31, 2018
Equity [Abstract] |
Reconciliation of Net Income/(Loss) Amounts and Weighted Average Number of Common and Common Equivalent Shares Used to Determine Basic and Diluted Earnings/(Loss) per Share | The following table provides a reconciliation of the net income/(loss) amounts and weighted average number of common and common equivalent shares used to determine basic and diluted earnings/(loss) per share for the three months ended July 31, 2018 and 2017 (in thousands, except per share data):
| For the Three Months Ended July 31, |
| 2018 |  |  | 2017 |
| Net |  |  |  |  |  |  | Per Share |  |  | Net |  |  |  |  |  |  | Per Share |
| Income |  |  | Shares |  |  | Amount |  |  | Income |  |  | Shares |  |  | Amount |
Basic earnings | $ |  | 7,645 |  |  |  | 54,345 |  |  | $ |  | 0.14 |  |  | $ |  | (2,165 | ) |  |  | 53,905 |  |  | $ |  | (0.04 | )
Effect of dilutive stock awards |  | — |  |  |  | 586 |  |  |  | — |  |  |  | — |  |  | — |  |  |  | — |
Diluted earnings | $ |  | 7,645 |  |  |  | 54,931 |  |  | $ |  | 0.14 |  |  | $ |  | (2,165 | ) |  |  | 53,905 |  |  | $ |  | (0.04 | )
Share Based Compensation Stock Options Activity | The number of shares and weighted average exercise prices of stock options for the three months ended July 31, 2018 and 2017 were as follows:
| For the Three Months Ended July 31, |
| 2018 |  |  | 2017 |
|  |  |  |  | Weighted |  |  |  |  |  |  | Weighted |
|  |  |  |  | Average |  |  |  |  |  |  | Average |
| Shares |  |  | Exercise Price |  |  | Shares |  |  | Exercise Price |
Options outstanding, beginning of year |  | 316,160 |  |  | $ | 6.69 |  |  |  | 335,160 |  |  | $ | 6.58 |
Exercised during the period |  | (17,399 | ) |  |  | 7.98 |  |  | — |  |  | — |
Options outstanding, end of period |  | 298,761 |  |  | $ | 6.61 |  |  |  | 335,160 |  |  | $ | 6.58 |
Weighted average remaining contractual life | 2.86 years |  |  |  |  |  |  | 3.76 years |  |  |  |  |
Options exercisable, end of period |  | 298,761 |  |  | $ | 6.61 |  |  |  | 335,160 |  |  | $ | 6.58 |
Weighted average remaining contractual life | 2.86 years |  |  |  |  |  |  | 3.76 years |  |  |  |  |
Summary of Activity for Unvested RSUs and PSUs | A summary of activity for unvested RSUs and PSUs for the three months ended July 31, 2018 and 2017 is as follows:
|  | For the Three Months Ended July 31, |
|  | 2018 |  |  | 2017 |
|  |  |  |  |  | Weighted |  |  |  |  |  |  | Weighted |
|  | Total # of |  |  | Average |  |  | Total # of |  |  | Average |
|  | Restricted |  |  | Grant Date |  |  | Restricted |  |  | Grant Date |
|  | Stock Units |  |  | Fair Value |  |  | Stock Units |  |  | Fair Value |
RSUs and PSUs outstanding, beginning of period |  |  | 1,442,316 |  |  | $ | 17.80 |  |  |  | 1,428,848 |  |  | $ | 18.46 |
Awarded |  |  | 140,771 |  |  |  | 12.35 |  |  |  | 180,184 |  |  |  | 23.57 |
Vested |  |  | (146,523 | ) |  |  | 18.78 |  |  |  | (247,491 | ) |  |  | 16.94 |
Forfeited |  |  | (118,180 | ) |  |  | 15.53 |  |  |  | (92,902 | ) |  |  | 12.71 |
RSUs and PSUs outstanding, end of period |  |  | 1,318,384 |  |  | $ | 17.31 |  |  |  | 1,268,639 |  |  | $ | 19.91 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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