Fair Value Measurements - Narratives (Details) - USD ($) $ in Thousands		3 Months Ended
		Jul. 01, 2016	Apr. 01, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Payments to Acquire Businesses		$ 2,900
Debt and Capital Lease Obligations		24,019
Business Combination, Contingent Consideration, Liability, Current	[1]	2,483
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Convertible Debt, Fair Value Disclosures		100,900		$ 123,100
Debt and Capital Lease Obligations		24,000
TVN [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		(5,500)
Business Combination, Contingent Consideration, Liability, Current			$ 8,000
Cash Earnout [Member] | TVN [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Payments to Acquire Businesses		3,500
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		2,000
Cash Earnout [Member] | TVN [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Payments to Acquire Businesses		3,500
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		2,000
Business Combination, Contingent Consideration, Liability, Current		2,500	$ 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		$ 2,900

[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 capped to (i) the difference between €76 million (approximately $83.3 million as converted from euros into U.S. dollars using an agreed upon average exchange rate) and $75 million, with respect to an adjustment based on TVN’s 2015 revenue, and (ii) up to $5 million with respect to an adjustment based on TVN’s 2015 backlog that ships during the first half of 2016. During the second quarter of 2016, the Company paid $3.5 million upon the finalization of the revenue and working capital adjustments. The remaining backlog adjustment amount has been finalized at $2.5 million and will be paid in the third quarter of 2016.