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Acquisitions - Purchase Consideration (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Nov. 15, 2018
USD ($)
customer
Dec. 31, 2018
USD ($)
Sep. 30, 2019
USD ($)
Business Acquisition [Line Items]      
Net cash outflow   $ 445,210  
GENEWIZ      
Business Acquisition [Line Items]      
Total purchase price $ 442,700    
Change in purchase price     $ (4,000)
Working capital adjustment $ 400    
GENEWIZ | Minimum      
Business Acquisition [Line Items]      
Number of institutional customers | customer 4,000