Earnings Per Share - Reconciliation of Basic and Diluted Weighted Average Shares Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 29, 2019	Mar. 30, 2018
Earnings Per Share [Abstract]
Net income	$ 7,091	$ 6,111
Weighted average common shares outstanding (in shares)	11,292	11,146
Add: Dilutive impact of stock options (in shares)	29	80
Add: Dilutive impact of restricted stock units (in shares)	78	112
Diluted weighted average common shares outstanding (in shares)	11,399	11,338
Earnings per share
Basic (in dollars per share)	$ 0.63	$ 0.55
Diluted (in dollars per share)	$ 0.62	$ 0.54