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Supplementary Balance Sheet Information (Composition Of Goodwill And Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified | Jul. 31, 2012 | Jul. 31, 2011 | Jul. 31, 2010
--- | --- | --- | ---
Balance Sheet Related Disclosures [Abstract] |  |  |
Goodwill | $ 287,123 | $ 285,412 |
Accumulated amortization | (17,354) | (17,354) |
Goodwill, net | 269,769 | 268,058 | 181,085
Gross indefinite-lived intangible assets | 107,211 | 105,838 |
Accumulated amortization | (24,713) | (24,713) |
Indefinite-lived intangible assets, net | 82,498 | 81,125 |
Gross amortizable intangible assets | 52,813 | 51,850 |
Accumulated amortization | (43,241) | (41,877) |
Amortizable intangible assets, net | 9,572 | 9,973 |
Total gross intangible assets | 160,024 | 157,688 |
Total accumulated amortization | (67,954) | (66,590) |
Net Intangible Assets Excluding Goodwill | $ 92,070 | $ 91,098 |

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