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Revenues - Disaggregation of Revenue (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) item segment | Jun. 30, 2019 USD ($)
Disaggregation of Revenue [Line Items] |  |  |  |
Number of operating segments | segment |  |  | 2 |
Net sales | $ 218,371 | $ 255,532 | $ 461,896 | $ 493,881
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 118,140 | 144,662 | 259,196 | 282,722
International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 100,231 | 110,870 | $ 202,700 | 211,159
Cardiovascular |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Number of product categories | item |  |  | 4 |
Net sales | 212,177 | 246,666 | $ 447,721 | 477,146
Cardiovascular | Peripheral Intervention |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 72,635 | 88,848 | 159,710 | 173,481
Cardiovascular | Cardiac Intervention |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 66,005 | 79,643 | 138,596 | 152,183
Cardiovascular | Custom Procedural Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 45,319 | 47,216 | 92,940 | 93,077
Cardiovascular | OEM |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 28,218 | 30,959 | 56,475 | 58,405
Cardiovascular | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 112,302 | 136,113 | 245,780 | 266,605
Cardiovascular | United States | Peripheral Intervention |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 42,614 | 55,975 | 98,416 | 111,575
Cardiovascular | United States | Cardiac Intervention |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 22,698 | 29,145 | 51,293 | 56,161
Cardiovascular | United States | Custom Procedural Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 23,383 | 25,150 | 48,797 | 48,965
Cardiovascular | United States | OEM |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 23,607 | 25,843 | 47,274 | 49,904
Cardiovascular | International |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 99,875 | 110,553 | 201,941 | 210,541
Cardiovascular | International | Peripheral Intervention |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 30,021 | 32,873 | 61,294 | 61,906
Cardiovascular | International | Cardiac Intervention |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 43,307 | 50,498 | 87,303 | 96,022
Cardiovascular | International | Custom Procedural Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 21,936 | 22,066 | 44,143 | 44,112
Cardiovascular | International | OEM |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 4,611 | 5,116 | 9,201 | 8,501
Endoscopy |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 6,194 | 8,866 | 14,175 | 16,735
Endoscopy | Endoscopy Devices |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 6,194 | 8,866 | 14,175 | 16,735
Endoscopy | United States | Endoscopy Devices |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | 5,838 | 8,549 | 13,416 | 16,117
Endoscopy | International | Endoscopy Devices |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Net sales | $ 356 | $ 317 | $ 759 | $ 618

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