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Acquisitions - Purchase Price Allocation (Osseon LLC) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Jul. 03, 2017
Dec. 31, 2016
Business Acquisition [Line Items]      
Goodwill $ 234,043   $ 211,927
Osseon LLC      
Business Acquisition [Line Items]      
Inventories   $ 1,023  
Property and equipment   58  
Goodwill   159  
Total assets acquired   6,840  
Developed Technology Rights | Osseon LLC      
Business Acquisition [Line Items]      
Intangibles   5,400  
Customer lists | Osseon LLC      
Business Acquisition [Line Items]      
Intangibles   $ 200