Business Acquisition - Acquisition and Integration Expenses (Details) - TVN [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Apr. 01, 2016
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs	$ 0	$ 2,436
Business Combination, Integration Related Costs	2,150	660
Cost of Goods, Product Line [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs	0	0
Business Combination, Integration Related Costs	342	58
Research and Development Expense [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs	0	0
Business Combination, Integration Related Costs	7	50
Selling, General and Administrative Expenses [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs	0	2,436
Business Combination, Integration Related Costs	$ 1,801	$ 552