Acquisitions - Narrative (Details) - USD ($)							3 Months Ended		6 Months Ended		12 Months Ended
	May 23, 2017	May 19, 2017	May 01, 2017	Jan. 31, 2017	Jul. 06, 2016	Feb. 04, 2016	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2017
Business Acquisition [Line Items]
Payments to acquire intangible assets									$ 1,082,000	$ 989,000
Goodwill acquired									13,216,000
Fusion Medical, Inc.
Business Acquisition [Line Items]
Total purchase price	$ 2,500,000
Ownership interest (percent)	19.50%
Equity Method Investments	$ 2,500,000
Fusion Medical, Inc. | Preferred Stock
Business Acquisition [Line Items]
Shares acquired	182,000
Vascular Access Technologies, Inc.
Business Acquisition [Line Items]
Total purchase price			$ 5,000,000
Contingent consideration			$ 4,900,000
Argon Medical Devices, Inc.
Business Acquisition [Line Items]
Total purchase price				$ 10,100,000
Net sales related to acquisition							$ 11,700,000		19,000,000
Weighted average useful life				5 years 11 months 15 days
Reduction of purchase price				$ (800,000)
Argon Medical Devices, Inc. | Preliminary Allocation
Business Acquisition [Line Items]
Total purchase price				10,897,000
Catheter Connections, Inc.
Business Acquisition [Line Items]
Total purchase price				$ 38,000,000
Net sales related to acquisition							2,500,000		4,300,000
Weighted average useful life				11 years 8 months
DFINE, Inc.
Business Acquisition [Line Items]
Total purchase price					$ 97,500,000
Net sales related to acquisition											$ 13,500,000
Weighted average useful life					14 years 10 months
Consideration paid related to net working capital adjustment					$ 578,000
Reduction of purchase price								$ 1,100,000
Measurement period adjustment, reduction in inventories								89,000
Measurement period adjustment, reduction in property and equipment								109,000
Measurement period adjustment, reduction in goodwill								1,200,000
Measurement period adjustment, reduction in accrued expenses								407,000
Measurement period adjustment, increase in deferred tax liabilities								(113,000)
HeRO®Graft
Business Acquisition [Line Items]
Total purchase price						$ 18,500,000
Weighted average useful life						9 years 9 months 25 days
Income since acquisition date									7,100,000
Developed technology
Business Acquisition [Line Items]
Intangible Assets							157,525,000	$ 135,358,000	157,525,000		135,358,000
Developed technology | Vascular Access Technologies, Inc.
Business Acquisition [Line Items]
Useful life			15 years
Developed technology | Argon Medical Devices, Inc.
Business Acquisition [Line Items]
Useful life				7 years
Developed technology | Catheter Connections, Inc.
Business Acquisition [Line Items]
Useful life				12 years
Developed technology | DFINE, Inc.
Business Acquisition [Line Items]
Useful life					15 years
Developed technology | HeRO®Graft
Business Acquisition [Line Items]
Useful life						10 years
Customer Lists
Business Acquisition [Line Items]
Intangible Assets							8,961,000		8,961,000	6,860,000
Customer Lists | Sugan Co, Ltd.
Business Acquisition [Line Items]
Useful life		5 years
Customer Lists | Sugan Co, Ltd. | Scenario, Forecast
Business Acquisition [Line Items]
Consideration Payable												$ 1,100,000
Customer Lists | Argon Medical Devices, Inc.
Business Acquisition [Line Items]
Useful life				5 years
Customer Lists | Catheter Connections, Inc.
Business Acquisition [Line Items]
Useful life				8 years
Customer Lists | DFINE, Inc.
Business Acquisition [Line Items]
Useful life					9 years
Customer Lists | HeRO®Graft
Business Acquisition [Line Items]
Useful life						12 years
License agreements
Business Acquisition [Line Items]
Payment obligation for certain milestones			$ 750,000
Current Royalty Rate			6.00%
Useful life			15 years
Payments to acquire intangible assets			$ 570,000
Intangible Assets							17,217,000		17,217,000	17,273,000
Trademarks
Business Acquisition [Line Items]
Intangible Assets							12,216,000		12,216,000	$ 9,050,000
Trademarks | Argon Medical Devices, Inc.
Business Acquisition [Line Items]
Useful life				5 years
Trademarks | Catheter Connections, Inc.
Business Acquisition [Line Items]
Useful life				10 years
Trademarks | DFINE, Inc.
Business Acquisition [Line Items]
Useful life					15 years
Trademarks | HeRO®Graft
Business Acquisition [Line Items]
Useful life						5 years 6 months
Cardiovascular Segment | Argon Medical Devices, Inc.
Business Acquisition [Line Items]
Acquisition-related costs							$ 1,300,000		$ 2,400,000
Cardiovascular Segment | DFINE, Inc.
Business Acquisition [Line Items]
Acquisition-related costs											$ 1,600,000