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Net Earnings Per Share (Tables) | 9 Months Ended
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Jan. 31, 2018
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table sets forth the computation of basic and diluted net earnings per share:
|  | Three Months Ended |  | Nine Months Ended
|  | January 31, |  | January 31,
(in thousands, except per share amounts) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Numerator used in basic and diluted net earnings |  |  |  |  |  |  |  |
per common share: |  |  |  |  |  |  |  |
Net income |  | $ | 1,996 |  |  | $ | 14,553 |  |  | $ | 44,032 |  |  | $ | 53,851 |
Denominator: |  |  |  |  |  |  |  |
Denominator for basic net earnings per common |  |  |  |  |  |  |  |
share - weighted-average shares |  | 16,578 |  |  | 16,242 |  |  | 16,350 |  |  | 16,267 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Stock options and restricted stock units |  | 113 |  |  | 140 |  |  | 112 |  |  | 134 |
Denominator for diluted net earnings per common |  |  |  |  |  |  |  |
share - weighted-average shares and assumed |  |  |  |  |  |  |  |
conversions |  | 16,691 |  |  | 16,381 |  |  | 16,462 |  |  | 16,401 |
Net earnings per share |  |  |  |  |  |  |  |
Basic |  | $ | 0.12 |  |  | $ | 0.90 |  |  | $ | 2.69 |  |  | $ | 3.31 |
Diluted |  | $ | 0.12 |  |  | $ | 0.89 |  |  | $ | 2.67 |  |  | $ | 3.28 |

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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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