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Employee Benefits (Tables)
 6 Months Ended
Jun. 30, 2012
Employee Benefits [Abstract]  
Net periodic pension cost
                 
    Second Quarter  
    Period from April  1,
2012 to June 30, 2012		     Period from April 3,
2011 to July 2, 2011		  

Service cost

   $ 469     $ 523  

Interest cost on projected benefit obligation

     1,221       1,152  

Expected return on plan assets

     (1,224 )      (1,376 ) 

Amortization of unrecognized loss

     519       145  
   

 

 

    

 

 

  

Net periodic pension cost

   $ 985     $ 444  
   

 

 

    

 

 

  
                 
    Six Months Ended  
    Period from January  1,
2012 to June 30, 2012		     Period from January  2,
2011 to July 2, 2011		  

Service cost

   $ 938     $ 1,046  

Interest cost on projected benefit obligation

     2,442       2,304  

Expected return on plan assets

     (2,448 )      (2,753 ) 

Amortization of unrecognized loss

     1,038       290  
   

 

 

    

 

 

  

Net periodic pension cost

   $ 1,970     $ 887