Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Income Tax Disclosure [Abstract]
Income Tax Examination, Penalties and Interest Expense	$ 700	$ (100)		$ 1,100
Unrecognized tax benefits, beginning balance	70,299	72,222	$ 78,242
Additions for tax positions of prior years	16,754	16,654	11,520
Lapse of statute of limitations	(19,196)	(18,577)	(17,540)
Unrecognized tax benefits, ending balance	$ 67,857	$ 70,299	$ 72,222	$ 78,242