Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation (Narrative) (Details)

v3.20.2
Share-Based Compensation (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Jun. 08, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized (in shares)           13,250,000
RSUs            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
TSR, maximum percent of performance period 5.00%     5.00%    
Vested (in shares) (900,000)   (458,000) (1,062,000) (791,000)  
Grant date fair value $ 600,000   $ 3,400,000 $ 1,300,000 $ 6,000,000.0  
Unrecognized compensation costs 19,700,000     $ 19,700,000    
Period for recognition       2 years 1 month 6 days    
RSUs | Vesting Percentage, Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting rights       0.00% 0.00%  
RSUs | Vesting Percentage, Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting rights       300.00% 200.00%  
Performance-based Equity Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vested (in shares)       0    
Grant date fair value $ 500,000   $ 0 $ 3,400,000 $ 4,300,000  
Performance-based Equity Awards | Vesting Percentage, Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting rights 0.00% 0.00%        
Performance-based Equity Awards | Vesting Percentage, Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting rights 30000.00% 200.00%        
Cash-Settled RSUs            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vested (in shares) (2,000)   (17,000) (12,000) (17,000)  
Unrecognized compensation costs $ 2,200,000     $ 2,200,000    
Period for recognition       2 years 3 months 18 days    
Award vesting period       3 years    
2020 Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares of common stock available for grant (in shares) 15,937,327     15,937,327