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Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
2 Months Ended 12 Months Ended
Jan. 01, 2016
Jan. 01, 2016
Jan. 02, 2015
Jan. 03, 2014
Defined Contribution And Benefit Plan Disclosure [Line Items]        
Defined Benefit Plan, Basis Points   0.50%    
Defined Contribution Plan Cash [Member]        
Defined Contribution And Benefit Plan Disclosure [Line Items]        
Employer matching contribution, percentage of employees' gross pay     35.00% 35.00%
Maximum contribution per employee, percent     6.00% 6.00%
Legacy Greatbatch 401(k) Plan [Member] | Defined Contribution Plan Cash [Member]        
Defined Contribution And Benefit Plan Disclosure [Line Items]        
Employer matching contribution, percentage of employees' gross pay   35.00%    
Maximum contribution per employee, percent   6.00%    
Net costs recognized   $ 2.3 $ 2.2 $ 2.0
Legacy Greatbatch 401(k) Plan [Member] | Defined Contribution Plan Stock [Member]        
Defined Contribution And Benefit Plan Disclosure [Line Items]        
Employer matching contribution, percentage of employees' gross pay   4.00%    
Employer contribution cost   $ 0.0 $ 4.2 $ 4.8
Shares Held In Employee Stock Plan 580,000 580,000    
Lakes Region Medical 401(k) Plan [Member] | Lake Region Medical 401(k) Plan [Member]        
Defined Contribution And Benefit Plan Disclosure [Line Items]        
Employer matching contribution, percentage of employees' gross pay   6.00%    
Maximum contribution per employee, percent   50.00%    
Net costs recognized $ 0.8      
Employer matching contribution, percentage   50.00%    
Vesting period   5 years    
Lakes Region Medical 401(k) Plan [Member] | Lake Region Medical 401(k) Plan [Member] | Maximum [Member]        
Defined Contribution And Benefit Plan Disclosure [Line Items]        
Employer matching contribution, percentage of employees' gross pay   3.00%