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Acquisitions - Pro Forma Financial Information (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Business Combinations [Abstract]        
Net sales $ 352.4 $ 344.9 $ 684.0 $ 675.9
Net income $ 38.7 $ 33.2 $ 62.0 $ 65.6
Basic earnings per share (in dollars per share) $ 1.00 $ 0.87 $ 1.61 $ 1.72
Diluted earnings per share (in dollars per share) $ 0.99 $ 0.85 $ 1.58 $ 1.69