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Segment Reporting - Operating Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales | $ 218,371 |  | $ 255,532 |  | $ 461,896 | $ 493,881
Operating income (loss) | (18,995) |  | 12,201 |  | (17,633) | 21,724
Total other expense - net | (3,305) |  | (3,202) |  | (6,659) | (5,879)
Income tax (benefit) expense | (3,242) |  | 2,140 |  | (2,080) | 2,791
Net income (loss) | (19,058) | $ (3,154) | 6,859 | $ 6,195 | (22,212) | 13,054
Cardiovascular |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales | 212,177 |  | 246,666 |  | 447,721 | 477,146
Operating income (loss) | (20,462) |  | 9,855 |  | (18,960) | 17,474
Endoscopy |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net sales | 6,194 |  | 8,866 |  | 14,175 | 16,735
Operating income (loss) | $ 1,467 |  | $ 2,346 |  | $ 1,327 | $ 4,250

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