Income Taxes Taxes by Jurisdiction (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		9 Months Ended
	Oct. 02, 2016	Jul. 03, 2016	Sep. 27, 2015	Jun. 28, 2015	Jul. 03, 2016	Jun. 28, 2015	Oct. 02, 2016	Sep. 27, 2015
Income Taxes [Line Items]
Federal and state income taxes	$ (2,662)		$ (1,643)				$ 4,051	$ 2,431
Foreign income taxes	376		135				594	888
Income tax expense (benefit)	$ (2,286)	$ (2,286)	$ (1,508)	$ (1,508)	$ 4,645	$ 3,319	$ 4,645	$ 3,319
Effective income tax rate	48.70%	48.70%	32.00%		41.80%	66.80%	41.80%	66.80%