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Business Combinations (Narratives) (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Jul. 14, 2017 | Mar. 07, 2017 | Oct. 28, 2016 | Sep. 30, 2017 | Sep. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2016
Business Acquisition [Line Items] |  |  |  |  |  |  |
Acquisition-related expenses |  |  |  |  | $ 4,244 |  | $ 2,321
Avaya Networking |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Asset purchase agreement closing date | Jul. 14, 2017 |  |  |  |  |  |
Business acquisition, purchase price |  | $ 100,000 |  |  |  |  |
Business acquisition, deposits amount |  |  |  |  |  | $ 10,200 |
Business acquisition, provisional consideration |  | $ 79,800 |  |  |  |  |
Avaya Networking | Acquisition and Integration Costs |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Acquisition-related expenses |  |  |  | $ 5,100 | 2,900 |  |
Avaya Networking | In-Process Research and Development |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Fair value of indefinite lived intangibles |  |  |  | $ 2,300 | $ 2,300 |  |
Zebra Technologies Corporation |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Net cash consideration |  |  | $ 49,500 |  |  |  |

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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=84229725&loc=d3e1043-128460 + Details
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