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Share-Based Compensation - Schedule of Information with Respect to all Outstanding Restricted Stock (Detail)
3 Months Ended
Mar. 31, 2016
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Ending balance of Outstanding Shares 2,000,000
Restricted Stock Shares [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Beginning balance of Outstanding Shares 758,000 [1]
Granted, Shares 1,546,000
Vested, Shares (307,000) [2]
Forfeited, Shares (45,000)
Ending balance of Outstanding Shares 1,952,000
Beginning balance of Outstanding, Weighted Average Grant-Date Fair Value Per Share | $ / shares $ 5.55 [1]
Granted, Weighted Average Grant-Date Fair Value Per Share | $ / shares 4.57
Vested, Weighted Average Grant-Date Fair Value Per Share | $ / shares 6.43 [2]
Forfeited, Weighted Average Grant-Date Fair Value Per Share | $ / shares 6.43
Ending balance of Outstanding, Weighted Average Grant-Date Fair Value Per Share | $ / shares $ 4.62
[1] The outstanding balance as of December 31, 2015 includes an adjustment of approximately 0.2 million restricted stock units. These units were previously recorded in the summary table of restricted stock units settled in cash due to the potential for cash settlement upon an involuntary, not for cause termination.
[2] The total vested awards include 9.2 thousand of vested stock settled in cash. As a result of the termination provision for certain awards, certain termination scenarios allow for cash-settlement.