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Employee Benefit Plans (Defined Contribution Plans) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Rate
Jun. 29, 2013
Non-Collective-Bargaining Plan [Member]
       
Defined Contribution Plans [Line Items]        
Percentage of Employees Covered     84.00%  
Employer Matching Contribution, Percentage     1.00%  
Employer Matching Contribution, Discretionary Percentage     2.00%  
Maximum Annual Contribution Per Employee, Percentage     3.00%  
Cost Recognized $ 135 $ 292 $ 367 $ 435
Collective-Bargaining Plan [Member]
       
Defined Contribution Plans [Line Items]        
Percentage of Employees Covered     16.00%  
Maximum Annual Contribution Per Employee, Percentage     2.75%  
Cost Recognized $ 27 $ 24 $ 45 $ 41