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Divestiture and Acquisition (Narrative) (Details) - USD ($)
$ in Thousands
 6 Months Ended
Oct. 27, 2015
Jul. 01, 2016
Business Acquisition [Line Items]    
Goodwill, measurement-period adjustment   $ 3,932
Lake Region Medical [Member]    
Business Acquisition [Line Items]    
Total purchase price and debt assumed $ 1,770,000  
Repayments of Debt $ 1,000,000  
Reason for Acquisition The Company believes that the combination of Greatbatch and Lake Region Medical brings together two highly complementary organizations that can provide a new level of industry leading capabilities and services to OEM customers while building value for stockholders.  
Goodwill, measurement-period adjustment   3,900
Deferred Tax Liability, measurement-period adjustment   2,600
Revenue since acquisition   403,200
Net loss since acquisition   $ 16,500
Increase in Inventory $ 23,000