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Goodwill and Intangibles - Intangible Assets Subject to Amortization (Detail) (USD $) In Thousands, unless otherwise specified									12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 Customer relationships [Member]	Sep. 30, 2011 Customer relationships [Member]	Sep. 30, 2012 Trade names [Member]	Sep. 30, 2011 Trade names [Member]	Sep. 30, 2012 Technology assets [Member]	Sep. 30, 2011 Technology assets [Member]	Sep. 30, 2012 Minimum [Member]	Sep. 30, 2012 Minimum [Member] Customer relationships [Member]	Sep. 30, 2012 Minimum [Member] Trade names [Member]	Sep. 30, 2012 Minimum [Member] Technology assets [Member]	Sep. 30, 2012 Maximum [Member]	Sep. 30, 2012 Maximum [Member] Customer relationships [Member]	Sep. 30, 2012 Maximum [Member] Trade names [Member]	Sep. 30, 2012 Maximum [Member] Technology assets [Member]
Finite And Indefinite Lived Intangible Assets By Major Class [Line Items]
Cost	$ 1,037,988	$ 960,442	$ 796,235	$ 738,937	$ 150,829	$ 149,700	$ 90,924	$ 71,805
Accumulated Amortization	164,127	103,328	113,012	73,373	28,347	16,320	22,768	13,635
Net	$ 873,861	$ 857,114	$ 683,223	$ 665,564	$ 122,482	$ 133,380	$ 68,156	$ 58,170
Intangible asset, Amortizable Life									1 year	15 years	1 year	4 years	3 years	20 years	12 years	17 years

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- Definition

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

+ References

Reference 1: 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=7658586&loc=d3e16323-109275



Reference 2: 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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- Definition

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

+ References

Reference 1: 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=7658586&loc=d3e16323-109275



Reference 2: 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.

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- Definition

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

+ References

Reference 1: 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=7658586&loc=d3e16323-109275



Reference 2: 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.

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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