Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation and Other Benefit Plans (Detail)

v3.10.0.1
Share-Based Compensation and Other Benefit Plans (Detail) - USD ($)
$ in Thousands
4 Months Ended 8 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 12, 2016
Dec. 31, 2018
Dec. 31, 2017
Successor [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based compensation (equity-classified) $ 81   $ 4,618 $ 3,809
Allocated Share-based Compensation Expense 81   4,618 3,809
Successor [Member] | Restricted Stock Units (RSUs)        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized     $ 7,800  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     42,459  
Successor [Member] | Stock Options        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     1 year 5 months 26 days  
Predecessor [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based compensation (equity-classified)   $ 1,511    
Allocated Share-based Compensation Expense   1,492    
Other Pension, Postretirement and Supplemental Plans [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Pension and Other Postretirement Benefits Cost (Reversal of Cost)       100
Other Pension, Postretirement and Supplemental Plans [Member] | Successor [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Liability, Defined Benefit Plan, Noncurrent     $ 1,400 $ 1,700
Pension and Other Postretirement Benefits Cost (Reversal of Cost) $ 100   $ 100  
Other Pension, Postretirement and Supplemental Plans [Member] | Predecessor [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Pension and Other Postretirement Benefits Cost (Reversal of Cost)   $ 100