Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Income Tax Disclosure [Abstract]
Income Tax Examination, Penalties and Interest Expense	$ 100,000	$ 0	$ (100,000)
Unrecognized tax benefits, beginning balance	26,205,000	26,271,000	26,573,000
Additions based on tax positions related to the current year	21,082,000	0	0
Additions for tax positions of prior years	0	0	0
Reductions for tax positions of prior years	0	0	0
Lapse of statute of limitations	(314,000)	(66,000)	(302,000)
Settlements	0	0	0
Unrecognized tax benefits, ending balance	$ 46,973,000	$ 26,205,000	$ 26,271,000