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Segment and Geographic Information (Narrative) (Details)
$ in Thousands
12 Months Ended
Jan. 02, 2016
USD ($)
segment
Jan. 03, 2015
USD ($)
Dec. 28, 2013
USD ($)
Segment Reporting Information [Line Items]      
Number of Operating Segments | segment 2    
Number of industry segments | segment 1    
Impairment of goodwill and intangible assets | $ $ 21,655 $ 0 $ 0
Qterics      
Segment Reporting Information [Line Items]      
Revenue, Percent 0.30%    
Net Loss, Percent 16.30%    
Impairment of goodwill and intangible assets | $ $ 12,700    
Assets, Percent 0.80%