Fair Value Measurements - Narratives (Details) - USD ($) $ in Thousands		Apr. 01, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt and Capital Lease Obligations		$ 25,307
Business Combination, Contingent Consideration, Liability, Current	[1]	7,991
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Debt, Fair Value Disclosures		103,800	$ 123,100
Debt and Capital Lease Obligations		25,300
Cash Earnout [Member] | TVN [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Current		8,000
Assumed Employee Equity Plans [Member] | TVN [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Current		$ 2,400

[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.