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Business Combinations - Narrative (Details) - USD ($) $ in Thousands | Jun. 12, 2019 | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill |  | $ 918,478 | $ 915,794
Miami Instruments |  |  |
Business Acquisition [Line Items] |  |  |
Fair value of consideration transferred | $ 17,000 |  |
Cash | 10,800 |  |
Contingent consideration | 6,000 |  |
Goodwill | 1,500 |  |
Miami Instruments | Developed technology and in process research and development |  |  |
Business Acquisition [Line Items] |  |  |
Intangible assets acquired | $ 14,700 |  |

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