Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation and Cash-Based Incentive Compensation - Summary of Share Activity Related to Restricted Stock Units (Details)

v3.8.0.1
Share-Based Compensation and Cash-Based Incentive Compensation - Summary of Share Activity Related to Restricted Stock Units (Details) - Restricted Stock Units (RSUs)
9 Months Ended
Sep. 30, 2017
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Nonvested, beginning of period | shares 6,107,248
Granted | shares 2,095,851
Vested | shares (323,870)
Forfeited | shares (343,918)
Nonvested, end of period | shares 7,535,311
Weighted Average Grant Date Value, Beginning of period | $ / shares $ 2.73
Weighted Average Grant Date Fair Value, Granted | $ / shares 2.77
Weighted Average Grant Date Fair Value, Vested | $ / shares 2.73
Weighted Average Grant Date Fair Value, Forfeited | $ / shares 2.76
Weighted Average Grant Date Value, End of period | $ / shares $ 2.74