Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Detail)

v3.10.0.1
Share-Based Compensation - Additional Information (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2018
USD ($)
shares
Sep. 30, 2018
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense for vested shares employees and directors | $ $ 900,000 $ 3,300,000
Unrecognized compensation expense | $ $ 201,000,000 $ 201,000,000
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)   800,000
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 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)   19,800,000
Vesting period two | Restricted Stock    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of awards to vest (in shares)   3,700,000