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Acquisitions - Pro Forma Financial Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Business Combinations [Abstract]    
Net sales $ 310,400 $ 364,300
Net income $ 36,600 $ 46,700
Basic earnings per share (in dollars per share) $ 940,000 $ 1,200,000
Diluted earnings per share (in dollars per share) $ 930,000 $ 1,190,000