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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 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Earnings Per Share [Abstract]        
Net income $ 40.3 $ 33.5 $ 67.7 $ 54.0
Weighted average shares outstanding - Basic (shares) 60.7 60.4 60.7 60.6
Dilutive effect of common stock equivalents (shares) 0.7 0.5 0.7 0.5
Weighted average shares outstanding - Diluted (shares) 61.4 60.9 61.4 61.1
Basic earnings per share:        
Earnings per share (usd per share) $ 0.66 $ 0.55 $ 1.12 $ 0.89
Diluted earnings per share:        
Earnings per share (usd per share) $ 0.66 $ 0.55 $ 1.10 $ 0.88