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Employee Benefit Plans (Amounts Recognized in the Consolidated Balance Sheets) (Details) - USD ($)
$ in Thousands
Dec. 28, 2016
Dec. 30, 2015
Defined Benefit Plan Disclosure [Line Items]    
Other current liabilities $ (259) $ (9,648)
Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Other current liabilities 0 (9,357)
Other noncurrent liabilities and deferred credits 0 0
Net amount recognized 0 (9,357)
Other Defined Benefit Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Other current liabilities (259) (291)
Other noncurrent liabilities and deferred credits (2,380) (2,378)
Net amount recognized $ (2,639) $ (2,669)