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JOTEC Acquisition (Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Nov. 30, 2017 | Oct. 10, 2017 | Sep. 30, 2017 | Dec. 31, 2016
Subsequent Event [Line Items] |  |  |  |
Term loan balance |  |  | $ 69,678 | $ 73,594
Scenario, Forecast [Member] | JOTEC AG [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Acquisition price | $ 225,000 |  |  |
Percent of payments to acquire business that is cash | 75.00% |  |  |
Percent of payments to acquire business that is in common stock issued | 25.00% |  |  |
Scenario, Forecast [Member] | JOTEC AG [Member] | Common Stock [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Common stock value issued in business combination | $ 56,250 |  |  |
Term Loan [Member] | Subsequent Event [Member] | JOTEC AG [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Term loan balance |  | $ 69,000 |  |
Senior Secured Credit Facility [Member] | Scenario, Forecast [Member] | JOTEC AG [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Financing for business acquisition | 255,000 |  |  |
Term Loan B [Member] | Scenario, Forecast [Member] | JOTEC AG [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Financing for business acquisition | 225,000 |  |  |
Revolving Credit Facility [Member] | Scenario, Forecast [Member] | JOTEC AG [Member] |  |  |  |
Subsequent Event [Line Items] |  |  |  |
Financing for business acquisition | $ 30,000 |  |  |

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