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Restructuring and Related Charges Restructuring and Related Charges, COS & OPEX (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jul. 01, 2016
Jun. 30, 2017
Jul. 01, 2016
Restructuring and Related Activities [Abstract]        
Production Related Impairments or Charges $ 278 $ 6 $ 786  
Production Related Impairment Cost Recovery       $ (23)
Restructuring Charges 777 1,903 2,056 4,515
Restructuring and Related Cost, Incurred Cost $ 1,055 $ 1,909 $ 2,842 $ 4,492