Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Performance Stock Units - Additional Information (Detail)

v3.20.2
Stock-Based Compensation - Performance Stock Units - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance stock, shares granted   2,064,594
2017 Omnibus Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period   6 years
Performance stock, shares granted   2,893,117
Performance Stock Units [Member] | 2017 Omnibus Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 3 years  
Increase in common stock starting price $ 12.48  
Unrecognized stock-based compensation expense related to performance stock units   $ 1.8
Unrecognized stock-based compensation expense, expected recognition weighted-average period   48 months
Performance Stock Units [Member] | Tranche One [Member] | 2017 Omnibus Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting percentage 50.00%  
Performance Stock Units [Member] | Tranche Two [Member] | 2017 Omnibus Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting percentage 100.00%  
Performance Stock Units [Member] | Tranche Three [Member] | 2017 Omnibus Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting percentage 120.00%  
Performance Stock Units [Member] | Three Executive Officers [Member] | 2017 Omnibus Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance stock, shares granted 311,667