Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation - Narrative (Details)

v3.22.0.1
Share-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for grant (in shares) 1,619,272    
Fair value of shares vested $ 4.6    
RSU equity awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted, grant date fair value per share (usd per share) $ 38.59 $ 21.07 $ 85.96
TSR, maximum percent of performance period 5.00%    
Granted (in shares) 643,000    
Fair value of shares vested $ 8.7 $ 1.6 $ 7.3
Unrecognized compensation cost related to unvested awards $ 21.2    
Weighted average period over which expense is expected to be recognized 2 years    
RSU equity awards | Vesting Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation arrangement vesting rights, percentage 0.00% 0.00% 0.00%
RSU equity awards | Vesting Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation arrangement vesting rights, percentage 300.00% 200.00% 200.00%
Performance-based RSU      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of shares vested   $ 3.4 $ 4.3
Cash-settleable RSU awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted, grant date fair value per share (usd per share) $ 36.71 $ 26.84 $ 105.08
Granted (in shares) 3,000    
Unrecognized compensation cost related to unvested awards $ 2.7    
Weighted average period over which expense is expected to be recognized 1 year    
Vesting period 3 years    
Cash payment made for vested awards $ 0.7 $ 0.2 $ 0.8
Cash-settleable RSU awards | Non-employee director | Amended and Restated Deferred Compensation Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 3,200    
Cash-settleable RSU awards | Employee      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 0    
Performance Based Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (in shares) 0