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Stock-Based Compensation (Tables) | 9 Months Ended
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Jan. 31, 2018
Stock-Based Compensation [Abstract] |
Schedule of Restricted Stock Data for Awards Granted | The following table summarizes restricted stock awards granted by the Company:
|  | Nine Months Ended January 31, |
|  | 2018 |  |  | 2017 |
Restricted Stock: |  |  |  |  |  |
Awards granted |  |  | 528 |  |  |  | 509 |
Weighted average fair value of grant |  | $ | 53.27 |  |  | $ | 50.56 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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