Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Oct. 01, 2016	Oct. 03, 2015
Income Tax Disclosure [Abstract]
Income (loss) before income taxes	$ 2,814	$ (3,088)	$ (20,731)	$ (43,785)
Income tax expense	$ 2,996	$ 2,116	$ 5,777	$ 4,879
Effective tax rate	106.50%	(68.50%)	(27.90%)	(11.10%)