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Business Combination (Narratives) (Details) - USD ($) $ in Thousands | Aug. 09, 2019 | Sep. 30, 2020 | Jun. 30, 2020
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Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 331,159 | $ 331,159
Aerohive Networks, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Business acquisition, cash consideration | $ 267,100 |  |
Business acquisition, date of acquisition | Aug. 09, 2019 |  |
Goodwill | $ 192,600 |  |
Identifiable intangible assets | $ 52,500 |  |

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