Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Detail)

v3.19.1
Share-Based Compensation - Additional Information (Detail)
3 Months Ended
Mar. 31, 2019
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based compensation expense for vested shares employees and directors | $ $ 2,100,000
Unrecognized compensation expense | $ $ 194,600,000
Restricted Stock  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based payments (in shares) 24,300,000
Number of awards to vest (in shares) 600,000
Share-based compensation expense for vested shares employees and directors | $ $ 0
Antidilutive securities excluded from computation of loss per share amount (in shares) 24,300,000
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
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
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) 4,000,000