Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Oct. 02, 2017	Feb. 17, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 2,235,592			$ 1,276,720	$ 1,295,852
Vascular Solutions, Inc.
Business Acquisition [Line Items]
Current assets			$ 61,592
Property, plant and equipment			45,533
Intangible assets			539,250
Goodwill			524,872
Other assets			728
Total assets acquired			1,171,975
Current liabilities			15,079
Deferred tax liabilities			181,372
Liabilities assumed			196,451
Net assets acquired			$ 975,524
NeoTract, Inc
Business Acquisition [Line Items]
Current assets		$ 32,887
Property, plant and equipment		6,980
Intangible assets		763,314
Goodwill		341,171
Other assets		184
Total assets acquired		1,144,536
Current liabilities		13,580
Deferred tax liabilities		155,806
Liabilities assumed		169,386
Net assets acquired		$ 975,150