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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2019 | Apr. 30, 2019 | Jan. 31, 2018 | Jul. 31, 2020 | Jul. 31, 2019 | Jul. 31, 2018
Share-Based Compensation Arrangement By Share-Based Payment Award, Options Exercisable [Abstract] |  |  |  |  |  |
Options Exercised | 4,000,000 | 3,000,000 | 80,000 |  |  |
Weighted Average Exercise Price | $ 17.81 | $ 17.81 | $ 6.54 |  |  |
Shares Net Settled for Exercise | 865,719 | 945,162 | 11,996 |  |  |
Shares Withheld for Taxes | 1,231,595 | 806,039 | 0 |  |  |
Net Shares to Employees | 1,902,686 | 1,248,799 | 68,004 |  |  |
Weighted Average Share Price for Withholding | $ 82.29 | $ 56.53 | $ 43.60 |  |  |
Payments for Employee Stock-Based Tax Withholdings | $ 101,348 | $ 45,565 | $ 0 | $ 103,451 | $ 46,888 | $ 1,115

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