Goodwill And Other Intangible Assets (Schedule Of Intangible Assets Purchased Through Business Acquisition) (Details) (USD $) In Thousands	Aug. 31, 2011	Aug. 31, 2010
Gross Carrying Amount	$ 217,573	$ 216,800
Accumulated Amortization	(128,467)	(112,687)
Net Carrying Amount	89,106	104,113
Trade Names [Member]
Gross Carrying Amount	52,892	47,888
Net Carrying Amount	52,892	47,888
Contractual Agreements And Customer Relationships [Member]
Gross Carrying Amount	85,131	83,746
Accumulated Amortization	(53,365)	(43,698)
Net Carrying Amount	31,766	40,048
Intellectual Property [Member]
Gross Carrying Amount	79,550	85,166
Accumulated Amortization	(75,102)	(68,989)
Net Carrying Amount	$ 4,448	$ 16,177

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 42, 45

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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),(b))

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

Name:	us-gaap_IntangibleAssetsNetExcludingGoodwill
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant