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Net revenues Other revenues (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Apr. 01, 2018
Revenue, Major Customer [Line Items] |  |
Net revenues | $ 613,584 | $ 587,230
Vascular access |  |
Revenue, Major Customer [Line Items] |  |
Net revenues | 143,897 | 144,028
Anesthesia |  |
Revenue, Major Customer [Line Items] |  |
Net revenues | 80,252 | 84,922
Interventional |  |
Revenue, Major Customer [Line Items] |  |
Net revenues | 103,184 | 90,142
Surgical |  |
Revenue, Major Customer [Line Items] |  |
Net revenues | 86,719 | 85,621
Interventional urology |  |
Revenue, Major Customer [Line Items] |  |
Net revenues | 59,731 | 42,300
OEM |  |
Revenue, Major Customer [Line Items] |  |
Net revenues | 54,238 | 45,854
Other (1) |  |
Revenue, Major Customer [Line Items] |  |
Net revenues | $ 85,563 | $ 94,363

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