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Share-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for future grant (in shares) 1,309,786   1,309,786    
Stock options expired (in shares)     500,000    
Weighted-average exercise prices, expired (in dollars per share)     $ 11.15    
Costs for share-based payment arrangements $ 2.9 $ 3.1 $ 7.7 $ 8.1  
Unamortized share-based compensation expense 14.1   $ 14.1    
Weighted average period over which unrecognized compensation cost is expected to be recognized     2 years    
Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Units granted (in shares)     375,769 555,986  
Weighted-average fair values per share (in dollars per share)     $ 10.53 $ 16.52  
Unrestricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Units granted (in shares)     165,030 96,668  
Weighted-average fair values per share (in dollars per share)     $ 10.63 $ 15.62  
Cash-settled Performance Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Units granted (in shares)     315,768 275,986  
Weighted-average fair values per share (in dollars per share)     $ 14.89 $ 20.21  
Restricted Stock Units, Guaranteed Minimum Payouts          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Liabilities recognized for restricted stock grants $ 2.6   $ 2.6   $ 4.8
Cash used to settle liabilities     $ 3.6 $ 0.3