v3.8.0.1
Stock-Based Compensation - Restricted Stock Units, Narrative (Details) - USD ($)
2 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average remaining period   2 years
Successor    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Allocated Share-based Compensation Expense $ 0 $ 7,400,000
RSUs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Percentage of granted units, eligible to be received   225.00%
Total unrecognized compensation cost   $ 6,500,000
Total unrecognized compensation cost, grant date fair value   4,800,000
RSUs | Successor | General and Administrative Expense    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Allocated Share-based Compensation Expense   $ 5,400,000
Minimum | RSUs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Requisite service period of awards   1 year
Maximum | RSUs    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Requisite service period of awards   3 years