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Supplementary Balance Sheet Information (Composition Of Goodwill And Intangible Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jul. 31, 2016 | Jul. 31, 2015 | Jul. 31, 2014
Balance Sheet Related Disclosures [Abstract] |  |  |
Disposal Group, Including Discontinued Operation, Intangible Assets | $ 39,400 |  |
Current Fiscal Year End Date | --07-31 |  |
Goodwill | $ 526,391 | $ 517,787 |
Accumulated amortization | (17,354) | (17,354) |
Goodwill, net | 509,037 | 500,433 | $ 378,148
Gross indefinite-lived intangible assets | 105,253 | 105,150 |
Accumulated amortization | (24,713) | (24,713) |
Indefinite-lived intangible assets, net | 80,540 | 80,437 |
Gross amortizable intangible assets | 79,524 | 118,482 |
Accumulated amortization | (20,057) | (54,770) |
Amortizable intangible assets, net | 59,467 | 63,712 |
Total gross intangible assets | 184,777 | 223,632 |
Total accumulated amortization | (44,770) | (79,483) |
Net Intangible Assets Excluding Goodwill | 140,007 | 144,149 |
Amortization of Intangible Assets | 4,700 | $ 5,100 | $ 4,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months | $ 2,400 |  |

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