Segment Information (Reconciliation of Revenue from Segments to Consolidated) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Apr. 01, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Total sales	$ 345,413	$ 332,238
Operating Segments [Member] | Medical Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total sales	334,067	320,566
Operating Segments [Member] | Medical Segment [Member] | Cardio And Vascular [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total sales	125,108	113,671
Operating Segments [Member] | Medical Segment [Member] | Cardiac Neuromodulation [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total sales	103,813	108,533
Operating Segments [Member] | Medical Segment [Member] | Advanced Surgical, Orthopedics, and Portable Medical [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total sales	105,146	98,362
Operating Segments [Member] | Non-Medical Segment [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Total sales	$ 11,346	$ 11,672