Acquisitions - Narrative (Details) shares in Thousands, $ in Thousands										1 Months Ended	3 Months Ended	9 Months Ended		12 Months Ended
	May 23, 2018 USD ($)	May 18, 2018 USD ($)	Apr. 06, 2018 USD ($)	Feb. 14, 2018 USD ($)	Oct. 02, 2017 USD ($)	Aug. 04, 2017 USD ($)	Jul. 03, 2017 USD ($)	May 01, 2017 USD ($)	Jan. 31, 2017 USD ($) patents	Jul. 31, 2018 USD ($) shares	Sep. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Payments to acquire intangible assets												$ 2,234	$ 1,927
Loan for long-term agreement												10,750	$ 0
QX Medical, LLC
Business Acquisition [Line Items]
Payments to acquire intangible assets		$ 750
NinePoint
Business Acquisition [Line Items]
Option to purchase outstanding equity, up to			100.00%
Consideration received, option to purchase remaining equity			$ 10,000
Net sales related to acquisition											$ 1,400	$ 2,500
Loan for long-term agreement			$ 10,500
Interest rate on loan			9.00%
Distribution agreements | QX Medical, LLC
Business Acquisition [Line Items]
Useful life		10 years
DirectACCESS Medical, LLC
Business Acquisition [Line Items]
Total purchase price	$ 7,300
Weighted average useful life	9 years 10 months 24 days
DirectACCESS Medical, LLC | Developed technology
Business Acquisition [Line Items]
Useful life	10 years
DirectACCESS Medical, LLC | Trademarks
Business Acquisition [Line Items]
Useful life	10 years
DirectACCESS Medical, LLC | Customer Lists
Business Acquisition [Line Items]
Useful life	5 years
Becton, Dickinson and Company
Business Acquisition [Line Items]
Total purchase price				$ 100,300
Weighted average useful life												8 years
Net sales related to acquisition											11,800	$ 30,300
Acquisition-related costs												$ 1,800
Becton, Dickinson and Company | Developed technology
Business Acquisition [Line Items]
Useful life												8 years
Becton, Dickinson and Company | Trademarks
Business Acquisition [Line Items]
Useful life												9 years
Becton, Dickinson and Company | Customer Lists
Business Acquisition [Line Items]
Useful life												7 years
ITL Healthcare Pty Ltd
Business Acquisition [Line Items]
Total purchase price					$ 11,300
Net sales related to acquisition											1,900	$ 6,100
ITL Healthcare Pty Ltd | Customer Lists
Business Acquisition [Line Items]
Useful life					7 years
Laurane Medical S.A.S.
Business Acquisition [Line Items]
Total purchase price						$ 16,500
Weighted average useful life						11 years 10 months 24 days
Contingent liability						$ 5,500
Laurane Medical S.A.S. | Developed technology
Business Acquisition [Line Items]
Useful life						12 years
Laurane Medical S.A.S. | Customer Lists
Business Acquisition [Line Items]
Useful life						1 year
Osseon LLC
Business Acquisition [Line Items]
Total purchase price							$ 6,800
Weighted average useful life							9 years
Net sales related to acquisition											478	1,600
Osseon LLC | Developed technology
Business Acquisition [Line Items]
Useful life							9 years
Osseon LLC | Customer Lists
Business Acquisition [Line Items]
Useful life							8 years
Vascular Access Technologies, Inc.
Business Acquisition [Line Items]
Total purchase price								$ 5,000
Contingent liability								$ 4,900
Vascular Access Technologies, Inc. | Developed technology
Business Acquisition [Line Items]
Useful life								15 years
Argon Medical Devices, Inc.
Business Acquisition [Line Items]
Total purchase price									$ 10,100
Weighted average useful life									6 years
Net sales related to acquisition											11,000	34,200
Initial payment, before working capital adjustment									$ 10,900
Working capital adjustment									$ (797)
Argon Medical Devices, Inc. | Cardiovascular Segment
Business Acquisition [Line Items]
Acquisition-related costs														$ 2,600
Argon Medical Devices, Inc. | Developed technology
Business Acquisition [Line Items]
Useful life									7 years
Argon Medical Devices, Inc. | Trademarks
Business Acquisition [Line Items]
Useful life									5 years
Argon Medical Devices, Inc. | Customer Lists
Business Acquisition [Line Items]
Useful life									5 years
Catheter Connections, Inc.
Business Acquisition [Line Items]
Total purchase price									$ 38,000
Weighted average useful life									11 years 8 months 12 days
Net sales related to acquisition											$ 3,700	$ 10,100
Number of patents acquired | patents									40
Catheter Connections, Inc. | Cardiovascular Segment
Business Acquisition [Line Items]
Acquisition-related costs														$ 482
Catheter Connections, Inc. | Developed technology
Business Acquisition [Line Items]
Useful life									12 years
Catheter Connections, Inc. | Trademarks
Business Acquisition [Line Items]
Useful life									10 years
Catheter Connections, Inc. | Customer Lists
Business Acquisition [Line Items]
Useful life									8 years
Cagent Vacsular, LLC
Business Acquisition [Line Items]
Preferred limited liability company units (in units) | shares										1,786
Payments to purchase preferred limited liability company units										$ 2,200
Equity method investment, ownership percentage										19.50%