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Equity Summary of Restricted Stock Awards (Details) - Restricted Stock
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Number of Shares  
Unvested, beginning of period | shares 1,228,898
Granted | shares 1,974,259
Vested | shares (517,883)
Forfeited | shares (72,007)
Unvested, end of period | shares 2,613,267
Weighted- Average Grant Date Fair Value  
Unvested, beginning of period (in dollars per share) | $ / shares $ 7.16
Granted (in dollars per share) | $ / shares 9.80
Vested (in dollars per share) | $ / shares 6.90
Forfeited (in dollars per share) | $ / shares 9.77
Unvested, end of period (in dollars per share) | $ / shares $ 9.14