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Acquisitions - Summary of Unaudited Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Apr. 30, 2020 | Apr. 30, 2019
Business Combinations [Abstract] |  |
Total revenue | $ 9,217,749 | $ 9,421,773
Net income | $ 265,233 | $ 205,987
Net income per common share |  |
Basic (in Dollars per share) | $ 7.18 | $ 5.61
Diluted (in Dollars per share) | $ 7.13 | $ 5.57

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