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Acquisition - Summary of Annual Unaudited Pro Forma Financial Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Business Acquisition Pro Forma Information [Abstract]    
Net sales $ 937,043 $ 904,430
Income from continuing operations $ 1,585 $ 1,396
Income per share from continuing operations $ 0.04 $ 0.03