Income Taxes (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective income tax rate	39.20%	41.20%
Unrecognized tax benefits	$ 2,532		$ 2,532
Unrecognized tax benefits that would impact effective tax rate	2,053		2,053
Unrecognized tax benefits, interest on income taxes accrued	$ 107		$ 107