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Net Income per Share - Computation of Basic and Diluted Earnings per Share (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 27, 2019
Sep. 28, 2018
Sep. 27, 2019
Sep. 28, 2018
Net income per share:        
Basic (in dollars per share) $ 0.15 $ 0.14 $ 0.45 $ 0.40
Diluted (in dollars per share) $ 0.15 $ 0.14 $ 0.45 $ 0.40
Weighted average common shares:        
Basic (in shares) 29,549,308 29,080,929 29,511,143 28,458,972
Diluted (in shares) 29,954,837 29,743,851 29,723,609 29,619,703