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Acquisitions - Purchase Price Allocation (Laurane Medical S.A.S.) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Aug. 04, 2017
Dec. 31, 2016
Business Acquisition [Line Items]      
Goodwill $ 234,043   $ 211,927
Laurane Medical S.A.S.      
Business Acquisition [Line Items]      
Inventories   $ 579  
Goodwill   6,381  
Total assets acquired   22,000  
Developed Technology Rights | Laurane Medical S.A.S.      
Business Acquisition [Line Items]      
Intangibles   14,920  
Customer lists | Laurane Medical S.A.S.      
Business Acquisition [Line Items]      
Intangibles   $ 120