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Share-Based Compensation - Performance Restricted Stock Units Narrative (Details)
shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
metric
shares
Dec. 31, 2022
USD ($)
metric
shares
Dec. 31, 2021
shares
PRSUs        
Share-based compensation        
Number of restricted stocks units granted (in shares) | shares 295 282 341  
Net reduction in number of awards with performance against target (in shares) | shares 201 305 285  
Unvested restricted stock units outstanding (in shares) | shares 125 60 371 388
PRSUs | Executive and senior officers        
Share-based compensation        
Performance payout period 1 year   1 year  
Number of metrics | metric     3  
Average share price trading period     20 days  
Share price, last day in trading period     20 days  
Vesting period 4 years      
Requisite service period 5 years      
Recognized share-based compensation expense | $ $ 0.4 $ 0.7 $ 1.2  
Unrecognized compensation cost, net of estimated forfeitures | $ $ 0.6      
Weighted-average period over which unrecognized compensation cost is expected to be recognized 2 years 3 months 18 days      
Income tax benefit recognized on share-based compensation | $ $ 1.6 $ 0.8 $ 1.6  
PRSUs | Executive and senior officers | Minimum        
Share-based compensation        
Target award percentage 0.00%      
PRSUs | Executive and senior officers | Maximum        
Share-based compensation        
Target award percentage 200.00%      
PRSUs | Executive Officer        
Share-based compensation        
Number of metrics | metric   3 3  
Restricted Stock Units        
Share-based compensation        
Vesting period 4 years      
Number of restricted stocks units granted (in shares) | shares 733 606 687  
Recognized share-based compensation expense | $ $ 4.1 $ 4.9 $ 3.7  
Unrecognized compensation cost, net of estimated forfeitures | $ $ 7.5      
Unvested restricted stock units outstanding (in shares) | shares 1,231 1,184 1,415 1,208
Weighted-average period over which unrecognized compensation cost is expected to be recognized 2 years 2 months 12 days      
Restricted Stock Units | Executive and senior officers        
Share-based compensation        
Dividend yield     0.00%