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Acquisitions - Purchase Price Allocation (Vascular Access Technologies, Inc.) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
May 01, 2017
Dec. 31, 2016
Business Acquisition [Line Items]      
Goodwill $ 226,829   $ 211,927
Vascular Access Technologies, Inc.      
Business Acquisition [Line Items]      
Goodwill   $ 4,323  
Deferred tax liabilities   (3,073)  
Total assets acquired   9,900  
Developed technology | Vascular Access Technologies, Inc.      
Business Acquisition [Line Items]      
Intangibles   7,800  
In-process technology | Vascular Access Technologies, Inc.      
Business Acquisition [Line Items]      
Intangibles   $ 850