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Fair Value Measurements - Narratives (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2016 | Jul. 01, 2016 | Apr. 01, 2016 | Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Debt and Capital Lease Obligations | $ 22,774 |  |  |
Business Combination, Contingent Consideration, Liability, Current | 0 |  |  |
Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Convertible Debt, Fair Value Disclosures | 161,200 |  |  | $ 123,100
Debt and Capital Lease Obligations | 22,800 |  |  |
TVN [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Business Combination, Contingent Consideration, Liability, Current |  |  | $ 8,000 |
Contingent consideration for TVN acquisition not yet paid | 0 |  |  |
Cash Earnout [Member] | TVN [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Other Payments to Acquire Businesses | 2,500 | $ 3,500 |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability | (2,100) |  |  |
Cash Earnout [Member] | TVN [Member] | Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Payments for Previous Acquisition | 2,500 | 3,500 |  |
Assumed Employee Equity Plans [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Other Payments to Acquire Businesses |  | 2,900 |  |
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 | $ 0 |  |  |
Contingent consideration for TVN acquisition not yet paid |  | $ 2,900 |  |

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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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