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Summary of Option Activity (Parenthetical) (Detail) (USD $) | 3 Months Ended
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Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted Average Price Per Share, Option exercised | $ 7.50 | $ 7.50 | $ 7.50

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- Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
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