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Estimated Useful Life of Definite-Lived Intangible Assets (Detail) | 12 Months Ended
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Sep. 30, 2014
Completed technology | Minimum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Estimated useful life | 4 years
Completed technology | Maximum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Estimated useful life | 10 years
Customer relationships | Minimum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Estimated useful life | 5 years
Customer relationships | Maximum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Estimated useful life | 15 years
Trade names | Minimum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Estimated useful life | 1 year
Trade names | Maximum |
Acquired Finite-Lived Intangible Assets [Line Items] |
Estimated useful life | 5 years

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- Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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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. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration