Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Narrative (Details)

v3.20.4
Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 04, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Aug. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Issuance of common stock, net of related expenses (in shares)   12,500,000      
Stock-based compensation expense   $ 16.3 $ 10.7 $ 11.3  
Capitalized stock-based compensation   $ 2.9 $ 5.8 $ 4.5  
Restricted stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of awards granted (in shares)   3,069,521 4,011,073 1,579,911  
Unrecognized compensation expense   $ 5.2      
Weighted average period   1 year 3 months 21 days      
Restricted stock | 2019 Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of awards granted (in shares)   7,630,554      
Restricted stock | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment award, award vesting period   1 year      
Restricted stock | Minimum | Director          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment award, award vesting period   1 year      
Restricted stock | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment award, award vesting period   3 years      
Restricted stock | Maximum | Employee          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based payment award, award vesting period   3 years      
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of awards granted (in shares)   0 2,009,144 0  
Unrecognized compensation expense   $ 1.4      
Weighted average period   1 year 3 months 7 days      
Share-based payment award, relative total shareholder return, target award, minimum     0.00%    
Share-based payment award, relative total shareholder Return, target award, maximum     200.00%    
Share-based payment award, expected award performance period     2 years    
Share-based payment award, fair value assumptions, risk free interest rate, minimum   1.56%      
Share-based payment award, fair value assumptions, risk free interest rate, maximum   2.42%      
Share-based payment award, fair value assumptions, expected volatility rate, minimum   29.10%      
Share-based payment award, fair value assumptions, expected volatility rate, maximum   85.10%      
Performance Shares | 2019 Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of awards granted (in shares)   840,595      
Incentive Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   $ 1.5      
Percentage of cash retention incentives clawed back 50.00%        
Percentage of cash retention incentives repaid 50.00%        
Cash retention         $ 13.5
Cash incentives net paid   3.6      
Prepaid cash incentives   $ 4.8