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Employee Benefit Plans (Tables)
6 Months Ended
Jul. 07, 2012
Employee Benefit Plans [Abstract]  
Summary of Pension (benefit) expense
                                 
    Three Months Ended     Six Months Ended  
    July 1,
2012
    July 3,
2011
    July 1,
2012
    July 3,
2011
 
    (Unaudited)     (Unaudited)  

Service cost

  $ 10     $ 7     $ 20     $ 18  

Interest cost on projected benefit obligation

    466       455       932       1,034  

Net amortizations, deferrals and other costs

    201       154       402       293  

Expected return on plan assets

    (608     (673     (1,216     (1,277
   

 

 

   

 

 

   

 

 

   

 

 

 
    $ 69     $ (57   $ 138     $ 68