Goodwill and Intangible Assets (Amortization) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014	Dec. 27, 2014
Property, Plant and Equipment [Line Items]
Amortization of intangible assets			$ 6,502
Finite-Lived Intangible Assets, Net, Amortization Expense, Rolling Maturity [Abstract]
2015	$ 6,635		6,635
2016	9,511		9,511
2017	3,314		3,314
2018	2,949		2,949
2019	2,447		2,447
and thereafter	2,831		2,831
Total	27,687		27,687		$ 31,789
Cost of Sales | Intellectual Property
Property, Plant and Equipment [Line Items]
Amortization of intangible assets	2,600	$ 4,400	5,200	$ 8,800
Selling, general and administrative | Intellectual Property
Property, Plant and Equipment [Line Items]
Amortization of intangible assets	$ 700	$ 700	$ 1,300	$ 1,400