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Segment Information (Reconciliation of Operating Profit (Loss) 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 Information [Line Items] |  |  |  |
Operating income from continuing operations | $ 44,358 | $ 36,062 | $ 74,401 | $ 59,965
Unallocated expenses, net | (12,563) | (26,248) | (24,148) | (46,414)
Income from continuing operations before taxes | 31,795 | 9,814 | 50,253 | 13,551
Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income from continuing operations | 65,572 | 56,497 | 116,285 | 105,776
Operating Segments [Member] | Medical Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income from continuing operations | 61,179 | 51,557 | 108,694 | 99,274
Operating Segments [Member] | Non-Medical Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income from continuing operations | 4,393 | 4,940 | 7,591 | 6,502
Segment Reconciling Items [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income from continuing operations | $ (21,214) | $ (20,435) | $ (41,884) | $ (45,811)

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