Intangible Assets (Amortization Expense by Categories) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 03, 2014	Sep. 27, 2013	Oct. 03, 2014	Sep. 27, 2013	Jan. 03, 2014
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets, Amortization Expense	$ 3,487	$ 3,251	$ 10,451	$ 9,959
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Remainder of 2014	3,426		3,426
2015	12,988		12,988
2016	10,676		10,676
2017	9,520		9,520
2018	7,232		7,232
Thereafter	24,921		24,921
Amortizing intangible assets, net	68,763		68,763		76,122
Cost of Sales [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets, Amortization Expense	1,567	1,668	4,696	5,207
Selling General And Administrative Expense [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets, Amortization Expense	1,756	1,446	5,190	4,343
Research and Development Expense [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets, Amortization Expense	$ 164	$ 137	$ 565	$ 409