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Business Segment, Geographic And Concentration Risk Information (Segment Revenue by Categories) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2013	Mar. 30, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	$ 148,265	$ 159,103
Revenue, Major Customer [Line Items]
Revenue Major Customer Percent	52.00%	43.00%
Customera [Member]
Revenue, Major Customer [Line Items]
Revenue Major Customer Percent	19.00%	20.00%
Customer B [Member]
Revenue, Major Customer [Line Items]
Revenue Major Customer Percent	18.00%	13.00%
Customer C [Member]
Revenue, Major Customer [Line Items]
Revenue Major Customer Percent	15.00%	10.00%
United States [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	71,334	82,406
Puerto Rico [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	28,498	23,540
Belgium [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	17,671	15,338
United Kingdom Ireland [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	7,536	12,357
Rest Of World [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	23,226	25,462
Implantable Medical [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	111,414	117,817
Implantable Medical [Member] | Cardiac Neuromodulation [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	71,167	75,135
Implantable Medical [Member] | Vascular [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	10,624	11,636
Implantable Medical [Member] | Orthopaedic [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	29,623	31,046
Electrochem [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	36,851	41,286
Electrochem [Member] | Portable Medical [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	18,889	18,720
Electrochem [Member] | Energy [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	12,293	14,771
Electrochem [Member] | Other Electrochem [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales Revenue, Net	$ 5,669	$ 7,795

X

- Definition

Percent of total company revenue from top four customers

+ References

No definition available.

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X

- 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=6880815&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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