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Business Combinations (Schedule of Identifiable Intangible Assets Acquired as Part of Acquisition) (Details) - USD ($) $ in Thousands | Oct. 27, 2017 | Jul. 14, 2017
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Data Center Business |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Amount | $ 32,200 |
Data Center Business | Developed technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Amount | $ 25,400 |
Data Center Business | Developed technology | Minimum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 2 years |
Data Center Business | Developed technology | Maximum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 5 years |
Data Center Business | Customer relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 5 years |
Amount | $ 5,400 |
Data Center Business | Trade names |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) | 4 years |
Amount | $ 1,400 |
Campus Fabric Business |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Amount |  | $ 42,200
Campus Fabric Business | Developed technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Amount |  | $ 32,700
Campus Fabric Business | Developed technology | Minimum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 2 years
Campus Fabric Business | Developed technology | Maximum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 4 years
Campus Fabric Business | Customer relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 4 years
Amount |  | $ 5,100
Campus Fabric Business | Trade names |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Amount |  | $ 2,600
Campus Fabric Business | Trade names | Minimum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 4 years
Campus Fabric Business | Trade names | Maximum |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 5 years
Campus Fabric Business | Backlog |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Useful Life (in years) |  | 1 year
Amount |  | $ 1,800

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