Income Taxes (Reconciliation Of Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, beginning balance	$ 26,573	$ 27,048	$ 27,320
Additions based on tax positions related to the current year	0	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	(302)	(475)	(272)
Settlements	0	0	0
Unrecognized tax benefits, ending balance	$ 26,271	$ 26,573	$ 27,048