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Earnings Per Share - Reconciliation of Net Income to Basic and Diluted EPS (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Earnings Per Share [Abstract]        
Net income $ 53.9 $ 43.3 $ 166.3 $ 111.0
Weighted average shares outstanding - Basic (shares) 61.0 60.8 61.0 60.7
Dilutive effect of common stock equivalents (shares) 0.7 0.6 0.7 0.7
Weighted average shares outstanding - Diluted (shares) 61.7 61.4 61.7 61.4
Basic earnings per share:        
Earnings per share (usd per share) $ 0.88 $ 0.71 $ 2.73 $ 1.83
Diluted earnings per share:        
Earnings per share (usd per share) $ 0.87 $ 0.71 $ 2.70 $ 1.81