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Share-Based Compensation - Schedule of Deferred Stock Units to be Settled in Shares (Detail) shares in Thousands | 9 Months Ended
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Sep. 30, 2015 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |
Beginning balance of Outstanding Shares | 117 |
Granted, Shares | 3 |
Vested, Shares | (15) | [1]
Ending balance of Outstanding Shares | 105 |
Beginning balance of Weighted Average Grant-Date Fair Value Per Unit | $ / shares | $ 4.39 |
Granted, Weighted Average Grant-Date Fair Value Per Unit | $ / shares | 5.73 |
Vested, Weighted Average Grant-Date Fair Value Per Unit | $ / shares | 4.39 | [1]
Ending balance of Weighted Average Grant-Date Fair Value Per Unit | $ / shares | $ 4.43 |
[1] | The total vested awards exclude 0.3 thousand of vested but unreleased awards. These awards are included in total outstanding awards until they are released under the terms of the agreement.

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- Definition The number of equity-based deferred stock units that vested during the reporting period. + References No definition available. + Details
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- Definition The number of grants made during the period for deferred stock units. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award deferred stock units grants in period weighted average grant date fair value. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award deferred stock units unreleased weighted average grant date fair value. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award deferred stock units vested weighted average grant date fair value. + References No definition available. + Details
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