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Summary of Significant Accounting Policies (Details Textuals) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 01, 2018 USD ($) | Jul. 31, 2019 USD ($) | Jul. 31, 2019 customer | Jul. 31, 2019 | Jul. 31, 2019 Segment | Jul. 31, 2018 USD ($) customer | Jul. 31, 2017 USD ($) customer | Aug. 01, 2019 USD ($)
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | $ 23,000 |  |  |  |  |  |  |
Cumulative Effect of New Accounting Standard in Period of Adoption |  |  |  |  |  |  |  | $ (22,954)
Share-based Payment Arrangement, Expense, Tax Benefit |  | $ 46,100 |  |  |  | $ 21,300 | $ 107,600 |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  | 59.50% |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  | 40.50% |  |
Proceeds from sale of majority-owned subsidiary |  | 0 |  |  |  | $ 1,796 | 0 |
Deconsolidation, Gain (Loss), Amount |  |  |  |  |  | 900 |  |
Advertising expenses |  | 7,500 |  |  |  | 5,900 | 5,600 |
Number of operating segments |  |  |  | 2 | 2 |  |  |
Number of reportable segment |  |  |  | 2 | 2 |  |  |
Capitalized Computer Software, Period Increase (Decrease) |  |  |  |  |  | 15,500 |  |
Capitalized Computer Software, Impairments |  |  |  |  |  |  | 19,400 |
Proceeds from the exercise of stock options |  | $ 34,398 |  |  |  | $ 44,459 | $ 31,188 |
Minimum |  |  |  |  |  |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |  |  |  |  |  |
Cumulative Effect of New Accounting Standard in Period of Adoption |  |  |  |  |  |  |  | 120,000
Maximum |  |  |  |  |  |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |  |  |  |  |  |
Cumulative Effect of New Accounting Standard in Period of Adoption |  |  |  |  |  |  |  | $ 135,000
Revenue Benchmark [Member] |  |  |  |  |  |  |  |
New Accounting Pronouncement, Early Adoption [Line Items] |  |  |  |  |  |  |  |
Number of Customers Exceeding Threshold | customer |  |  | 0 |  |  | 0 | 0 |

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