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Share-Based Compensation - Schedule of Deferred Stock Units to be Settled in Shares (Parenthetical) (Detail) | 9 Months Ended
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Sep. 30, 2015 shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Vested but unreleased awards | 300

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- Definition Share based compensation arrangement by share based payment award deferred stock unit vested but unreleased in period. + References No definition available. + Details
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Period Type: | duration

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- References No definition available. + Details
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