Intangible Assets (Schedule of Finite-Lived Intangible Assets, Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Oct. 02, 2015	Oct. 03, 2014
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets, Amortization Expense	$ 3,243	$ 3,487	$ 10,008	$ 10,451
Cost of Sales [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets, Amortization Expense	1,324	1,567	4,240	4,696
Selling General And Administrative Expense [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets, Amortization Expense	1,831	1,756	5,474	5,190
Research and Development Expense [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets, Amortization Expense	$ 88	$ 164	$ 294	$ 565