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Net Income Per Common Share (Tables) | 12 Months Ended
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Apr. 30, 2018
Earnings Per Share [Abstract] |
Schedule of Basic and Diluted Earnings Per Share | Computations for basic and diluted earnings per common share are presented below:
| Years ended April 30,
| 2018 |  | 2017 |  | 2016
Basic |  |  |  |  |
Net income | $ | 317,903 |  |  | $ | 177,485 |  |  | $ | 225,982 |
Weighted average shares outstanding-basic | 37,778,304 |  |  | 39,124,665 |  |  | 39,016,299 |
Basic earnings per common share | $ | 8.41 |  |  | $ | 4.54 |  |  | $ | 5.79 |
Diluted |  |  |  |  |
Net income | $ | 317,903 |  |  | $ | 177,485 |  |  | $ | 225,982 |
Weighted-average shares outstanding-basic | 37,778,304 |  |  | 39,124,665 |  |  | 39,016,299 |
Plus effect of stock options and restricted stock units | 353,795 |  |  | 454,333 |  |  | 405,900 |
Weighted-average shares outstanding-diluted | 38,132,099 |  |  | 39,578,998 |  |  | 39,422,199 |
Diluted earnings per common share | $ | 8.34 |  |  | $ | 4.48 |  |  | $ | 5.73 |

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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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