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Business Acquisition Narratives (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Feb. 29, 2016 | Jul. 01, 2016 | Apr. 01, 2016 | Jul. 03, 2015 | Jul. 01, 2016 | Jul. 03, 2015 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  | 100.00% |  |  | 100.00% |  |
Business Combination, Contingent Consideration, Liability, Current | [1] |  | $ 2,483,000 |  |  | $ 2,483,000 |  |
Goodwill |  |  | 235,369,000 |  |  | 235,369,000 |  | $ 197,781,000
Indefinite-lived Intangible Assets Acquired |  |  | 1,000,000 |  |  |  |  |
Gross Profit |  |  | 51,040,000 |  | $ 54,385,000 | 91,694,000 | $ 109,413,000 |
Goodwill, Acquired During Period |  |  |  |  |  | 37,630,000 |  |
Business Combination, Acquisition and Integration Related Expenses |  |  | 3,400,000 |  |  | 6,500,000 |  |
TVN [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 100.00% |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Current |  |  |  | $ 8,000,000 |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  |  | 5,500,000 |  |  |  |  |
Business Combination, Consideration Transferred |  | $ 84,600,000 | 82,546,000 |  |  |  |  |
Purchase Consideration Remain in Escrow |  |  | $ 13,500,000 |  |  | 13,500,000 |  |
Purchase Consideration Escrow Period |  |  | 18 months |  |  |  |  |
Goodwill |  |  | $ 37,630,000 |  |  | 37,630,000 |  |
Revenues |  |  | 18,300,000 |  |  | 21,200,000 |  |
Gross Profit |  |  | 6,900,000 |  |  | 7,100,000 |  |
Goodwill, Acquired During Period |  |  |  | $ 39,200,000 |  |  |  |
Business Combination, Acquisition Related Costs |  |  | 885,000 |  |  | 3,321,000 |  |
In Process Research and Development | TVN [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets | [2] |  | $ 0 |  |  | 0 |  |
Developed Technology | TVN [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  | 4 years |  |  |  |  |
Maximum [Member] | In Process Research and Development | TVN [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Project Completion Period |  |  | 6 months |  |  |  |  |
Fair Value Adjustment To Deferred Revenue [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Revenues |  |  |  |  | $ 5,700,000 |  | $ 8,100,000 |
TVN's 2015 backlog [Member] | TVN [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  |  | $ 2,100,000 |  |  |  |  |
Contingent consideration for TVN acquisition not yet paid |  |  | $ 2,500,000 |  |  | $ 2,500,000 |  |
TVN's 2015 backlog [Member] | Maximum [Member] | TVN [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Contingent consideration for TVN acquisition not yet paid |  | $ 5,000,000 |  |  |  |  |  |
[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.
[2] | By the end of the second quarter of 2016, the Company completed the TVN in-process research and development activities and as a result, the in-process research and development of $1.0 million was reclassified to developed technology.

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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- Definition Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
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- Definition This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to items of consideration transferred in connection with a business combination for which the initial accounting was incomplete. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1500-128463 + Details
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- Definition Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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