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Goodwill and Other Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 26, 2015
Sep. 27, 2014
Sep. 26, 2015
Sep. 27, 2014
Dec. 27, 2014
Goodwill and Intangible Assets Disclosure [Abstract]          
Goodwill $ 3,389   $ 3,389   $ 3,389
Finite-Lived Intangible Assets, Net 3,148   3,148   $ 3,378
Amortization of intangibles $ 76 $ 105 $ 229 $ 255