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Acquisitions - Narrative (Details) - USD ($) |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 31, 2017 | Jul. 06, 2016 | Feb. 04, 2016 | Mar. 31, 2017 | Dec. 31, 2016 | Mar. 31, 2016 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payments to acquire intangible assets |  |  |  | $ 668,000 |  | $ 482,000 |
Goodwill acquired |  |  |  | 7,612,000 |  |  |
Argon Medical Devices, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Total purchase price | $ 10,897,000 |  |  |  |  |  |
Net sales related to acquisition |  |  |  | 7,200,000 |  |  |
Weighted average useful life | 5 years 11 months 15 days |  |  |  |  |  |
Catheter Connections, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Total purchase price | $ 38,000,000 |  |  |  |  |  |
Net sales related to acquisition |  |  |  | 1,800,000 |  |  |
Weighted average useful life | 11 years 10 months |  |  |  |  |  |
DFINE, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Total purchase price |  | $ 97,500,000 |  |  |  |  |
Net sales related to acquisition |  |  |  |  |  |  | $ 13,500,000
Trade receivables acquired, gross |  | 4,300,000 |  |  |  |  |
Trade receivables, expected to be uncollectible |  | $ (224,000) |  |  |  |  |
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 |  |  |  | 156,414,000 | $ 135,358,000 |  | 135,358,000
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 |  |  |  | 7,616,000 |  | 6,860,000 |
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 |  |  |  |
Trademarks |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible Assets |  |  |  | 13,128,000 |  | $ 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 |  |  |  | $ 1,100,000 |  |  |
Cardiovascular Segment | DFINE, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Acquisition-related costs |  |  |  |  |  |  | $ 1,600,000

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