Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Income Tax Disclosure [Abstract]
Income Tax Examination, Penalties and Interest Expense	$ 100	$ 1,100	$ 1,600
Unrecognized tax benefits, beginning balance	72,222	78,242	76,111
Additions for tax positions of prior years	16,654	11,520	12,394
Lapse of statute of limitations	(18,577)	(17,540)	(10,263)
Unrecognized tax benefits, ending balance	$ 70,299	$ 72,222	$ 78,242