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Employee Benefits (Tables)
9 Months Ended
Sep. 29, 2012
Employee Benefits [Abstract]  
Net periodic pension cost
    Third Quarter  
 
 
 
Period from July 1,
2012 to September 29, 2012
   
Period from July 3,
2011 to October 1, 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  

 
 
    Nine Months Ended  
 
 
 
Period from January 1,
2012 to September 29, 2012
   
Period from January 2,
2011 to October 1, 2011
 
       
Service cost
  $ 1,407     $ 1,569  
Interest cost on projected benefit obligation
    3,663       3,456  
Expected return on plan assets
    (3,672 )     (4,128 )
Amortization of unrecognized loss
     1,557        435  
Net periodic pension cost
  $ 2,955     $ 1,332