Business Acquisition Narratives (Details) - USD ($)			3 Months Ended
		Feb. 29, 2016	Apr. 01, 2016	Apr. 03, 2015	Dec. 31, 2015
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			100.00%
Business Combination, Contingent Consideration, Liability, Current	[1]		$ 7,991,000
Purchase Consideration Escrow Period			18 months
Goodwill			$ 237,899,000		$ 197,781,000
Net loss			(25,180,000)	$ (2,657,000)
Goodwill, Acquired During Period			39,206,000
TVN [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Payments to Acquire Businesses, Gross		$ 84,600,000
Purchase Consideration Remain in Escrow			13,500,000
Goodwill			39,206,000
Revenues			2,900,000
Net loss			(5,500,000)
Business Combination, Acquisition Related Costs			3,096,000
In Process Research and Development | TVN [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets			$ 980,000
Minimum [Member] | In Process Research and Development | TVN [Member]
Business Acquisition [Line Items]
Project Completion Period			3 months
Maximum [Member] | In Process Research and Development | TVN [Member]
Business Acquisition [Line Items]
Project Completion Period			6 months

[1] The TVN acquisition is subject to post-closing adjustments as set forth in the TVN Purchase Agreement to be determined within 90 days from the acquisition date in amounts respectively capped to (i) the difference between €76 million (as converted from euros into U.S. dollars) and $75 million, with respect to an adjustment based on TVN’s 2015 revenue, and (ii) $5 million with respect to an adjustment based on TVN’s 2015 backlog that ships during the first half of 2016.