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Schedule of Share-based Compensation Expense (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |
Equity award expense acceleration | $ 0.2 | $ 0.2
Share based awards, value of shares forfeited | $ 1.2 | $ 1.2

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Value of Awards Forfeited + References No definition available. + Details
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- Details
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- Definition Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition. + References No definition available. + Details
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