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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 28, 2015
Jun. 29, 2014
Jun. 28, 2015
Jun. 29, 2014
Dec. 28, 2014
Income Tax Examination [Line Items]          
Deferred Tax Assets, Valuation Allowance $ 3,900   $ 3,900   $ 3,900
Income tax (provision) benefit $ 4,200 $ 3,623 $ 3,439 $ 6,860  
Effective Income Tax Rate, Continuing Operations 39.00% 42.00% 24.00% 41.00%