Goodwill And Other Intangible Assets (Schedule Of Estimated Annual Amortization Expense) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Apr. 30, 2012
Goodwill And Other Intangible Assets [Abstract]
Estimated annual amortization expense, For the fiscal year ending July 2012	$ 11,133
Estimated annual amortization expense, For the fiscal year ending July 2013	10,944
Estimated annual amortization expense, For the fiscal year ending July 2014	10,676
Estimated annual amortization expense, For the fiscal year ending July 2015	10,318
Estimated annual amortization expense, For the fiscal year ending July 2016	9,262
Estimated annual amortization expense, For the fiscal year ending July 2017 and thereafter	$ 73,028