Income Taxes (Schedule Of Reconciliation Of Beginning And Ending Amount Of Gross Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Income Taxes [Abstract]
Gross unrecognized tax benefits at beginning of fiscal year	$ 20,005	$ 18,994	$ 16,928
Additions for tax positions of the current year	3,323	7,406	3,122
Additions for tax positions of prior years	261	668	470
Reductions for tax positions of prior years	(333)	(164)	(179)
Settlements	(4,129)	(3,895)
Reductions due to a lapse of applicable statute of limitations	(2,613)	(3,004)	(1,347)
Gross unrecognized tax benefits at end of fiscal year	$ 16,514	$ 20,005	$ 18,994