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Note 7. Employee Benefits (Tables)
9 Months Ended
Sep. 23, 2012
Schedule of Net Benefit Costs [Table Text Block]
   
Three Months Ended
 
   
Pension Benefits
   
Other Benefits
 
(In thousands)
 
Sept. 23,
2012
   
Sept. 25,
2011
   
Sept. 23,
2012
   
Sept. 25,
2011
 
Service cost
  $ -     $ -     $ 50     $ 57  
Interest cost
    5,290       5,606       445       477  
Expected return on plan assets
    (5,926 )     (5,999 )     -       -  
Amortization of prior-service cost
    -       -       315       430  
Amortization of net loss/(gain)
    1,412       949       (205 )     (256 )
Net periodic benefit cost
  $ 776     $ 556     $ 605     $ 708  
   
Nine Months Ended
 
   
Pension Benefits
   
Other Benefits
 
                         
(In thousands)
   
Sept. 23,
2012
     
Sept. 25,
2011
     
Sept. 23,
2012
     
Sept. 25,
2011
 
Service cost
  $ -     $ -     $ 150     $ 170  
Interest cost
    15,871       16,819       1,335       1,432  
Expected return on plan assets
    (17,778 )     (17,997 )     -       -  
Amortization of prior-service cost
    -       -       944       1,291  
Amortization of net loss/(gain)
    4,236       2,846       (615 )     (769 )
Net periodic benefit cost
  $ 2,329     $ 1,668     $ 1,814     $ 2,124