Intangible Assets (Amortization Expense by categories) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2016	Jan. 02, 2015	Jan. 03, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 17,496	$ 13,877	$ 13,167
Cost of Sales [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	7,403	6,201	6,822
Selling, General and Administrative Expenses [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	9,681	7,009	5,800
Research and Development Expense [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 412	$ 667	$ 545