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Acquisitions - Narrative (Details) - USD ($) |  |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
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Sep. 01, 2017 | Aug. 04, 2017 | Jul. 03, 2017 | Jul. 01, 2017 | Jun. 16, 2017 | May 23, 2017 | May 19, 2017 | May 01, 2017 | Jan. 31, 2017 | Jul. 06, 2016 | Feb. 04, 2016 | Sep. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,927,000 | $ 1,594,000 |  |
Goodwill acquired |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,698,000 |  |  |
Laurane Medical S.A.S. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  | $ 16,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration |  | $ 5,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average useful life |  | 11 years 11 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Osseon LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  | $ 6,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales related to acquisition |  |  |  |  |  |  |  |  |  |  |  | $ 442,000 |  | 442,000 |  |  |
Weighted average useful life |  |  | 8 years 11 months 15 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  | 11,000,000 |  | 30,000,000 |  |  |
Weighted average useful life |  |  |  |  |  |  |  |  | 5 years 11 months 15 days |  |  |  |  |  |  |  |
Reduction of purchase price |  |  |  |  |  |  |  |  | $ (797,000) |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  | 2,700,000 |  | 7,000,000 |  |  |
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 Rights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible Assets |  |  |  |  |  |  |  |  |  |  |  | 172,796,000 | $ 135,358,000 | 172,796,000 |  | 135,358,000 |
Developed Technology Rights | Laurane Medical S.A.S. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  | 12 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed Technology Rights | Osseon LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  | 9 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Developed Technology Rights | Vascular Access Technologies, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  |  |  | 15 years |  |  |  |  |  |  |  |  |
Developed Technology Rights | Argon Medical Devices, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  |  |  |  | 7 years |  |  |  |  |  |  |  |
Developed Technology Rights | Catheter Connections, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  |  |  |  | 12 years |  |  |  |  |  |  |  |
Developed Technology Rights | DFINE, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  |  |  |  |  | 15 years |  |  |  |  |  |  |
Developed Technology Rights | HeRO®Graft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |
Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible Assets |  |  |  |  |  |  |  |  |  |  |  | 8,481,000 |  | 8,481,000 | 6,860,000 |  |
Customer lists | Laurane Medical S.A.S. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer lists | Osseon LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  | 8 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 | $ 15,000,000 |  |  | $ 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Current Royalty Rate | 6.00% |  |  | 6.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life |  |  |  | 15 years |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire intangible assets | $ 11,900,000 |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |
Intangible Assets |  |  |  |  |  |  |  |  |  |  |  | 19,417,000 |  | 19,417,000 | 17,273,000 |  |
Patent rights and other intellectual property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |
Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible Assets |  |  |  |  |  |  |  |  |  |  |  | 11,878,000 |  | 11,878,000 | $ 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 |  |  |  |  |  |  |  |  |  |  |  | 90,000 |  | 2,500,000 |  |  |
Cardiovascular Segment | Catheter Connections, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition-related costs |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  | $ 482,000 |  |  |
Cardiovascular Segment | DFINE, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition-related costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,600,000 |

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