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Income Taxes (Components Of Provision (Benefit) For Income Taxes) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2014
Income Tax Disclosure [Abstract]      
Current Fiscal Year End Date --07-31    
Current federal $ 70,553 $ 12,668 $ 8,082
Current state 10,555 5,501 1,565
Current Foreign Tax Expense (Benefit) 4,431 3,581 0
Total current 85,539 21,750 9,647
Deferred federal 7,603 11,534 5,470
Deferred state 1,051 1,623 749
Deferred Foreign Income Tax Expense (Benefit) (1,028) (189) 0
Deferred Income Tax Expense (Benefit) 7,626 12,968 6,219
Provision for income taxes $ 93,165 $ 34,718 $ 15,866