Income Taxes (Components Of Provision (Benefit) For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Income Tax Disclosure [Abstract]
Current federal	$ (13,467)	$ 24,309	$ (43,366)
Current state	(731)	8,539	9,562
Current Foreign Tax Expense (Benefit)	4,141	20,205	18,436
Total current	(10,057)	53,053	(15,368)
Deferred federal	12,597	16,983	(45,922)
Deferred state	4,266	5,282	2,941
Deferred Foreign Income Tax Expense (Benefit)	572	154	(2,789)
Deferred Income Tax Expense (Benefit)	17,435	22,419	(45,770)
Provision for income taxes	$ 7,378	$ 75,472	$ (61,138)