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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2017
Excess tax benefits related to stock-based compensation | (3.00%) | (20.90%) |
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | $ 17,540 | $ 10,263 | $ 0
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 11,520 | 12,394 | 19,079
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | 2,300 |  |
Impact of Tax Reform |  | 61,000 |
Deferred Tax Assets, Net |  | 67,000 |
Unrecognized tax benefits, income tax penalties and interest accrued | 6,300 | 5,200 |
Income tax examination, penalties and interest expense | (1,100) | (1,600) | $ (2,000)
Deferred Tax Assets, Tax Credit Carryforwards, Foreign | 4,200 |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $ 4,200 |  |
Transition Tax Provisional Charge |  | $ 6,000 |
Impacts of the Tax Act | 0.00% | (24.70%) |
Interest Expense [Member] |  |  |
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | $ 17,500 |  |
State and Local Jurisdiction [Member] |  |  |
State operating loss carryforwards | $ 8,900 |  |
Operating loss carryforwards, valuation allowance |  | $ 4,000 |

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