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Supplementary Balance Sheet Information (Composition Of Goodwill And Intangible Assets) (Details) (USD $) In Thousands | Jul. 31, 2011 | Jul. 31, 2010 | Jul. 31, 2009
--- | --- | --- | ---
Supplementary Balance Sheet Information |  |  |
Goodwill | $ 285,412 | $ 198,439 |
Accumulated amortization | (17,354) | (17,354) |
Goodwill, net | 268,058 | 181,085 | 167,950
Gross indefinite-lived intangible assets | 105,838 | 105,838 |
Accumulated amortization | (24,713) | (24,713) |
Indefinite-lived intangible assets, net | 81,125 | 81,125 |
Gross amortizable intangible assets | 51,850 | 48,326 |
Accumulated amortization | (41,877) | (40,178) |
Amortizable intangible assets, net | 9,973 | 8,148 |
Total gross intangible assets | 157,688 | 154,164 |
Total accumulated amortization | (66,590) | (64,891) |
Total intangible assets, net | $ 91,098 | $ 89,273 |

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- Definition The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275 + Details
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