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Income Taxes Presentation of Net Deferred Tax Liabilities and Assets (Details) - USD ($) $ in Thousands | Jul. 31, 2020 | Jul. 31, 2019
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Presentation of Net Deferred Tax Liabilities and Assets [Abstract] |  |
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent | $ 6,751 | $ 7,286
Deferred Tax Liabilities, Net, Noncurrent | 234,191 | 168,759
Deferred Tax Liabilities, Net | $ 227,440 | $ 161,473

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