Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014	Dec. 28, 2014
Income Tax Examination [Line Items]
Deferred Tax Assets, Valuation Allowance	$ 3,900		$ 3,900		$ 3,900
Income tax (provision) benefit	$ (2,669)	$ 321	$ (6,108)	$ (6,539)
Effective Income Tax Rate, Continuing Operations	35.00%	(12.00%)	28.00%	47.00%
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 1,000		$ 1,000