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Mergers and Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Aug. 09, 2017 | Jul. 01, 2017
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 169.4 |  | $ 151.6
Trilithic, Inc |  |  |
Business Acquisition [Line Items] |  |  |
Net tangible assets acquired |  | $ 11.8 |
Goodwill |  | 16.9 |
Total purchase price |  | 55.5 |
Developed technology | Trilithic, Inc |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets acquired: |  | 15.5 |
Customer relationships | Trilithic, Inc |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets acquired: |  | 11.0 |
Other | Trilithic, Inc |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets acquired: |  | $ 0.3 |

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