Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Detail)

v3.19.2
Share-Based Compensation - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense for vested shares employees and directors $ 700,000 $ 2,785,000 $ 2,368,000
Unrecognized compensation expense $ 196,100,000 $ 196,100,000  
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based payments (in shares)   24,600,000  
Number of awards to vest (in shares)   700,000  
Share-based compensation expense for vested shares employees and directors   $ 0  
Antidilutive securities excluded from computation of loss per share amount (in shares)   24,600,000  
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Antidilutive securities excluded from computation of loss per share amount (in shares)   2,000,000.0  
2016 Omnibus Compensation Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of common stock authorized for issuance (in shares) 40,000,000 40,000,000  
Vesting period one | Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of awards to vest (in shares)   19,700,000  
Vesting period two | Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of awards to vest (in shares)   4,200,000