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)

v3.10.0.1
Share-Based Compensation and Cash-Based Incentive Compensation - Summary of Share Activity Related to Restricted Stock Units (Details) - Restricted Stock Units (RSUs)
6 Months Ended
Jun. 30, 2018
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Nonvested, beginning of period | shares 5,765,251
Vested | shares (28,503)
Forfeited/adjustments | shares (45,017)
Nonvested, end of period | shares 5,691,731
Nonvested, beginning of period | $ / shares $ 2.48
Vested | $ / shares 2.38
Forfeited/adjustments | $ / shares 2.47
Nonvested, end of period | $ / shares $ 2.48