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Income Taxes Components of Income before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jul. 31, 2017
Components of Income Before Income Taxes [Abstract]      
Income (Loss) from Continuing Operations before Income Taxes, Domestic $ 306,323 $ 264,379 $ 251,478
Income (Loss) from Continuing Operations before Income Taxes, Foreign 92,642 75,713 96,971
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest $ 398,965 $ 340,092 $ 348,449