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Goodwill - Additional Information (Detail) | Sep. 30, 2012
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Goodwill And Intangible Assets Disclosure [Abstract] |
Goodwill impairment test fair value in excess of carrying amount percentage | 25.00%

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- Definition Goodwill Impairment Test, Fair Value In Excess of Carrying Amount, Percentage + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration