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Segment Reporting - Operating Income (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Segment Reporting Information [Line Items] |  |
Net sales | $ 243,525 | $ 238,349
Operating income | 1,362 | 9,523
Total other expense - net | (3,354) | (2,677)
Income tax expense | 1,162 | 651
Net income (loss) | (3,154) | 6,195
Cardiovascular |  |
Segment Reporting Information [Line Items] |  |
Net sales | 235,544 | 230,480
Operating income | 1,502 | 7,619
Endoscopy |  |
Segment Reporting Information [Line Items] |  |
Net sales | 7,981 | 7,869
Operating income | $ (140) | $ 1,904

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