Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation - Additional Information (Detail)

v3.10.0.1
Share-Based Compensation - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in dollars per share)   $ 11.02 $ 9.59 $ 3.52
Share-based compensation   $ 5,126,000 $ 23,019,000 $ 24,495,000
Settlement of bonuses accrued       $ 2,000,000
Unrecognized compensation expense   $ 197,000,000    
Share-based payments, shares   0 2,000,000 0
Weighted average grant date fair value (in dollars per share)     $ 2.72  
Exercised (in shares)   0 0  
Granted (in shares)   4,311,000    
Vested (in shares)   213,000    
Restricted Stock, Restricted Stock Units (RSUs), and Phantom Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation   $ 0    
Total grant date fair value of restricted stock vested   $ 2,500,000 $ 3,700,000 $ 400,000
Granted (in shares)   24,400,000    
Vested (in shares)   600,000    
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period (in years)   3 years    
Omnibus Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of common stock authorized for issuance   40,000,000    
Granted (in dollars per share) $ 11.88      
First anniversary of FID | Restricted Stock, Restricted Stock Units (RSUs), and Phantom Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested (in shares)   19,800,000    
Second anniversary of FID | Restricted Stock, Restricted Stock Units (RSUs), and Phantom Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested (in shares)   4,000,000