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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