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Acquisitions (Details) - USD ($) $ in Thousands | Oct. 28, 2015 | Dec. 10, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
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Business Acquisition [Line Items] |  |  |  |  |
Purchase price allocated to goodwill |  |  | $ 25,561 | $ 12,242 |
ADI Engineering, Inc. [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Aggregate purchase price in cash | $ 10,000 |  |  |  |
Contingent consideration | 7,802 |  |  |  |
Total purchase price | 17,802 |  |  |  |
Purchase price allocated to tangible assets | 222 |  |  |  |
Purchase price allocated to intangibles assets | 4,261 |  |  |  |
Purchase price allocated to goodwill | 13,319 |  |  |  |
Contingent consideration |  |  | 4,942 |  |
Total obligation company must pay as first milestone was acheived | $ 3,000 |  |  |  |
Fiberblaze [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Aggregate purchase price in cash |  | $ 10,161 |  |  |
Contingent consideration |  | 4,683 |  |  |
Total purchase price |  | 14,844 |  |  |
Purchase price allocated to tangible assets |  | 2,022 |  |  |
Purchase price allocated to intangibles assets |  | 1,996 |  |  |
Purchase price allocated to goodwill |  | 12,242 |  |  |
Purchase price allocated to liabilities assumed |  | $ 1,416 |  |  |
Total obligation company must pay as the milestones were partly achieved |  |  | $ 1,498 |  |

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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