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Employee Benefit Plans (Change in Benefit Obligation and Plan Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 28, 2016
Dec. 30, 2015
Dec. 31, 2014
Pension Plan [Member]      
Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year $ 67,735 $ 74,208  
Service cost 105 380 $ 380
Interest cost 0 2,983 3,099
Actuarial (gains) losses 945 (5,780)  
Benefits paid (1,057) (4,056)  
Settlements (67,728) 0  
Benefit obligation at end of year 0 67,735 74,208
Accumulated benefit obligation 0 67,735  
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 58,378 62,820  
Actual return on plan assets 861 (386)  
Employer contributions 9,546 0  
Benefits paid (1,057) (4,056)  
Settlements (67,728) 0  
Fair value of plan assets at end of year 0 58,378 62,820
Funded status 0 (9,357)  
Other Defined Benefit Plans [Member]      
Change in Benefit Obligation [Roll Forward]      
Benefit obligation at beginning of year 2,669 2,713  
Service cost 0 0  
Interest cost 91 107 123
Actuarial (gains) losses 73 43  
Benefits paid (194) (194)  
Settlements 0 0  
Benefit obligation at end of year 2,639 2,669 2,713
Accumulated benefit obligation 2,639 2,669  
Change in Plan Assets [Roll Forward]      
Fair value of plan assets at beginning of year 0 0  
Actual return on plan assets 0 0  
Employer contributions 194 194  
Benefits paid (194) (194)  
Settlements 0 0  
Fair value of plan assets at end of year 0 0 $ 0
Funded status $ (2,639) $ (2,669)