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Earnings Per Share (Tables) | 12 Months Ended
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Apr. 30, 2017
Earnings Per Share [Abstract] |
Schedule Of Earnings (Loss) Per Share, Basic And Diluted | The following table summarizes the computations of basic and diluted earnings per share:
| FISCAL YEARS ENDED APRIL 30
(in thousands, except per share amounts) | 2017 |  | 2016 |  | 2015
Numerator used in basic and diluted earnings per common share: |  |  |  |  |
Net income | $ | 71,199 |  |  | $ | 58,723 |  |  | $ | 35,499 |
Denominator: |  |  |  |  |
Denominator for basic earnings per common share - |  |  |  |  |
weighted-average shares | 16,259 |  |  | 16,256 |  |  | 15,764 |
Effect of dilutive securities: |  |  |  |  |
Stock options and restricted stock units | 139 |  |  | 186 |  |  | 273 |
Denominator for diluted earnings per common share - |  |  |  |  |
weighted-average shares and assumed conversions | 16,398 |  |  | 16,442 |  |  | 16,037 |
Net earnings per share |  |  |  |  |
Basic | $ | 4.38 |  |  | $ | 3.61 |  |  | $ | 2.25 |
Diluted | $ | 4.34 |  |  | $ | 3.57 |  |  | $ | 2.21 |

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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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