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Supplementary Balance Sheet Information (Composition Of Goodwill And Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2013
Jul. 31, 2012
Jul. 31, 2011
Balance Sheet Related Disclosures [Abstract]      
Goodwill $ 366,178 $ 287,123  
Accumulated amortization (17,354) (17,354)  
Goodwill, net 348,824 269,769 268,058
Gross indefinite-lived intangible assets 100,889 107,211  
Accumulated amortization (24,713) (24,713)  
Indefinite-lived intangible assets, net 76,176 82,498  
Gross amortizable intangible assets 90,990 52,813  
Accumulated amortization (45,822) (43,241)  
Amortizable intangible assets, net 45,168 9,572  
Total gross intangible assets 191,879 160,024  
Total accumulated amortization (70,535) (67,954)  
Net Intangible Assets Excluding Goodwill $ 121,344 $ 92,070