Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Earnings Per Share [Abstract]
Net income	$ 6,796	$ 7,284	$ 18,707	$ 17,495
Basic and diluted weighted average shares outstanding	31,597	27,046	30,718	26,996
Basic and diluted net income per common share	$ 0.22	$ 0.27	$ 0.61	$ 0.65