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

Accumulated Amortization Excluding Goodwill

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The cumulative amount of amortization related to goodwill.

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Gross Intangible Assets Excluding Goodwill

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Indefinite-Lived Intangible Assets, Accumulated Amortization

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Indefinite-Lived Intangible Assets (Excluding Goodwill), Net

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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Carrying amount of assets (excluding financial assets) that lack physical substance, excluding goodwill, having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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