Summary Of Significant Accounting Policies (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2009
Summary Of Significant Accounting Policies
Foreign currency translation adjustment	$ 131,699	$ 59,194	$ 75,155
Net gain (loss) on cash flow hedging derivatives, net of deferred taxes	380	(462)	(394)
Pension liability adjustment, net of deferred taxes	(92,052)	(99,218)	(84,438)
Total accumulated other comprehensive income (loss)	$ 40,027	$ (40,486)	$ (9,677)