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Fair Value Measurements - Narratives (Details) - USD ($) $ in Thousands | Apr. 01, 2016 | Dec. 31, 2015
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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.

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