Goodwill And Other Intangible Assets (Schedule Of Estimated Annual Amortization Expense) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jan. 31, 2012
Goodwill And Other Intangible Assets [Abstract]
Estimated annual amortization expense, For the fiscal year ending July 2012	$ 11,131
Estimated annual amortization expense, For the fiscal year ending July 2013	10,939
Estimated annual amortization expense, For the fiscal year ending July 2014	10,671
Estimated annual amortization expense, For the fiscal year ending July 2015	10,313
Estimated annual amortization expense, For the fiscal year ending July 2016	9,256
Estimated annual amortization expense, For the fiscal year ending July 2017 and thereafter	$ 72,945