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Share-based Compensation (Details) - USD ($)
shares in Thousands, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award        
Share-based compensation, fair value of awards granted     $ 13.6  
Allocated share-based compensation expense $ 2.6 $ 2.3 6.6 $ 5.6
Share based compensation expense not yet recognized $ 18.8   $ 18.8  
Period in which unrecognized share based compensation will be recognized (in years)     2 years 3 months 18 days  
Director        
Share-based Compensation Arrangement by Share-based Payment Award        
Share-based compensation, fair value of restricted shares granted     $ 0.5  
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award        
Share-based compensation, shares granted (shares)     50  
Share-based compensation, vesting period (in years)     4 years  
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award        
Share-based compensation, restricted shares granted (shares)     40  
Share-based compensation, vesting period (in years)     3 years  
Share-based compensation, shares vested other than options (shares)     50  
Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award        
Share-based compensation, restricted shares granted (shares)     50  
Share-based compensation, vesting period (in years)     3 years  
Share-based compensation, shares vested other than options (shares)     30  
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award        
Share-based compensation, shares vested other than options (shares)     50