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Segment Reporting - Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 203,035	$ 171,069
Operating income	8,781	5,609
Cardiovascular
Segment Reporting Information [Line Items]
Net sales	195,855	164,754
Operating income	6,397	3,981
Endoscopy
Segment Reporting Information [Line Items]
Net sales	7,180	6,315
Operating income	$ 2,384	$ 1,628

X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

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X

- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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