Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation and Other Benefit Plans - Additional Information (Detail)

v3.10.0.1
Share-Based Compensation and Other Benefit Plans - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
4 Months Ended 8 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 12, 2016
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation     $ 4,489 $ 2,975
Time Vested Restricted Stock Units [Domain]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     347,440  
Performance Restricted Stock Units [Domain]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     98,526  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     0  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 0.00  
Performance Restricted Stock Units [Domain] | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares expected to vest at grant date     0.00%  
Performance Restricted Stock Units [Domain] | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares expected to vest at grant date     200.00%  
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value     $ 3,300 800
Vests ratably over 3 years | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting description     One-third vesting in each year  
Vests ratably over 3 years | Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting description     One-third vesting in each year  
Vests ratably over 3 years | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting description     One-third vesting in each year  
Employees and Directors        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     749,600  
Other Pension, Postretirement and Supplemental Plans [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pension and Other Postretirement Benefits Cost (Reversal of Cost)       100
Pension Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay     6.00%  
Predecessor [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation (equity-classified)   $ (1,511)    
Recognized expense   500    
Predecessor [Member] | Liability-classified awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation (equity-classified)   $ (19)    
Predecessor [Member] | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expiration period   10 years    
Vesting period   3 years    
Predecessor [Member] | Performance Based Restricted Stock Units (PBRSUs) | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares expected to vest at grant date   0.00%    
Predecessor [Member] | Performance Based Restricted Stock Units (PBRSUs) | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares expected to vest at grant date   200.00%    
Predecessor [Member] | Vests ratably over 3 years | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights percentage   33.33%    
Predecessor [Member] | Vests ratably over 3 years | Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights percentage   33.33%    
Predecessor [Member] | Vests ratably over 3 years | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights percentage   33.33%    
Predecessor [Member] | Performance Period 1 | Performance Based Restricted Stock Units (PBRSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance period   1 year    
Predecessor [Member] | Performance Period 2 | Performance Based Restricted Stock Units (PBRSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance period   2 years    
Predecessor [Member] | Performance Period 3 | Performance Based Restricted Stock Units (PBRSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance period   3 years    
Predecessor [Member] | Other Pension, Postretirement and Supplemental Plans [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pension and Other Postretirement Benefits Cost (Reversal of Cost)   $ 100    
Successor [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation (equity-classified) $ (81)   $ (4,618) (3,809)
Recognized expense 100   $ 600 500
Successor [Member] | Performance Restricted Stock Units [Domain]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     98,526  
Successor [Member] | Liability-classified awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation (equity-classified)   $ 0 0
Successor [Member] | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     1 year 5 months 26 days  
Successor [Member] | Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [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  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 65.96  
Successor [Member] | Other Pension, Postretirement and Supplemental Plans [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pension and Other Postretirement Benefits Cost (Reversal of Cost) $ 100   $ 100  
Liability, Defined Benefit Plan, Noncurrent     1,400 1,700
Successor [Member] | Pension Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation     $ 300 $ 200