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Segment Information (Reconciliation of Revenue from Segments to Consolidated) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 29, 2018 | Jun. 30, 2017 | Jun. 29, 2018 | Jun. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Total sales from continuing operations | $ 314,464 | $ 280,916 | $ 606,890 | $ 547,652
Operating Segments [Member] | Medical Segment [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Total sales from continuing operations | 299,458 | 265,173 | 579,172 | 520,563
Operating Segments [Member] | Medical Segment [Member] | Cardio And Vascular [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Total sales from continuing operations | 148,766 | 130,718 | 285,629 | 254,202
Operating Segments [Member] | Medical Segment [Member] | Cardiac Neuromodulation [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Total sales from continuing operations | 115,941 | 106,173 | 224,851 | 209,928
Operating Segments [Member] | Medical Segment [Member] | Advanced Surgical, Orthopedics, and Portable Medical [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Total sales from continuing operations | 34,751 | 28,282 | 68,692 | 56,433
Operating Segments [Member] | Non-Medical Segment [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Total sales from continuing operations | $ 15,006 | $ 15,743 | $ 27,718 | $ 27,089

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