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Segment Information (Reconciliation of Operating Profit (Loss) from Segments to Consolidated) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 01, 2021 | Dec. 31, 2020 | Oct. 02, 2020 | Oct. 01, 2021 | Oct. 02, 2020
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | $ 33,090 |  | $ 39,758 | $ 107,048 | $ 93,019
Unallocated expenses, net | (9,911) |  | (8,358) | (28,113) | (24,815)
Income before taxes | 23,179 |  | 31,400 | 78,935 | 68,204
Gain related to litigation settlement |  | $ 28,200 | 28,200 |  | 28,200
Operating Segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | 54,363 |  | 29,991 | 169,685 | 125,797
Operating Segments | Medical |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | 52,347 |  | 28,777 | 164,311 | 120,903
Operating Segments | Non-Medical |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | 2,016 |  | 1,214 | 5,374 | 4,894
Segment Reconciling Items |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | $ (21,273) |  | $ 9,767 | $ (62,637) | $ (32,778)

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