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Goodwill And Other Intangible Assets (Schedule Of Estimated Annual Amortization Expense) (Details) (USD $)
In Thousands, unless otherwise specified |
9 Months Ended |
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Apr. 30, 2012
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| 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 |