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Business Segment, Geographic And Concentration Risk Information (Reconciliation of Revenue from Segments to Consolidated) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	$ 348,382	$ 174,890	$ 680,620	$ 336,210
Advanced Surgical, Orthopedics, and Portable Medical [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	104,317	53,181	195,646	105,819
Cardio And Vascular [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	144,219	12,907	277,869	23,263
Cardiac Neuromodulation [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	91,623	92,257	188,698	172,873
Electrochem [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	9,819	16,545	21,491	34,255
Greatbatch Medical [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue From Intersegment Sales	100		300
Lake Region Medical [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue From Intersegment Sales	300		1,000
Interproduct-Line Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	(1,596)	0	(3,084)	0
Operating Segments [Member] | Greatbatch Medical [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	141,167	172,786	272,773	329,763
Operating Segments [Member] | QiG [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	2,747	2,741	6,121	7,788
Operating Segments [Member] | Lake Region Medical [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	204,934	0	403,209	0
Intersegment Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	$ (466)	$ (637)	$ (1,483)	$ (1,341)

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Revenue From Intersegment Sales

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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