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Benefit Plans (Schedule of Defined Benefit Plan, Change in Benefit Obligation) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 01, 2016
Jul. 03, 2015
Jul. 01, 2016
Jul. 03, 2015
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]        
At January 1, 2016     $ 7,121  
Net defined benefit cost $ 198 $ 102 390 $ 207
Benefit payments     (70)  
Foreign currency translation     116  
At July 1, 2016 $ 7,557   $ 7,557