Earnings Per Share - Computation of Basic and Diluted Net Income Per Share (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Net income per share:
Basic (in dollars per share)	$ 0.14	$ 0.11	$ 0.40	$ 0.19
Diluted (in dollars per share)	$ 0.14	$ 0.11	$ 0.40	$ 0.19
Weighted average common shares:
Basic (in shares)	29,080,929	26,092,387	28,458,972	26,011,913
Diluted (in shares)	29,743,851	27,387,619	29,619,703	26,063,655