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Employee Benefit Plans (Amounts Recognized in Accumulated Other Comprehensive Income, Not Yet Recognized as a Component of Net Periodic Benefit Cost) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 28, 2016
Dec. 30, 2015
Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Unamortized actuarial losses, net $ 0 $ (23,955)
Other Defined Benefit Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Unamortized actuarial losses, net (1,033) $ (1,045)
Other Defined Benefit Plans [Member] | Maximum [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated other comprehensive income to be recognized in 2017 $ 100