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Income Taxes Presentation of Net Deferred Tax Liabilities and Assets (Details) - USD ($)
$ in Thousands
Jul. 31, 2020
Jul. 31, 2019
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