Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Income Tax Disclosure [Abstract]
Income (loss) before income taxes	$ (2,908)	$ (9,290)	$ (40,697)	$ (54,198)
Income tax expense (benefit)	$ 2,230	$ 1,318	$ 2,763	$ 2,759
Effective Tax Rate	(76.70%)	(14.20%)	(6.80%)	(5.10%)