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Note I - Pension and Other Postretirement Benefit Plans (Tables)
 3 Months Ended
Sep. 28, 2018
Notes Tables  
Schedule of Net Funded Status [Table Text Block]
   
For the Quarter Ended
  
   
September 28, 2018
    
September 29, 2017
  
Pension Benefits:
                
Service cost
   $
246
     $
262
  
Interest cost
    
1,092
      
1,074
  
Expected return on plan assets
    
(1,331
 )    
(1,525
 )
Amortization of transition obligation
    
9
      
9
  
Amortization of prior service cost
    
1
      
1
  
Amortization of actuarial net loss
    
678
      
759
  
Net periodic benefit cost
   $
695
     $
580
  
                 
Postretirement Benefits:
                
Service cost
   $
5
     $
5
  
Interest cost
    
76
      
92
  
Amortization of actuarial net loss
    
(69
 )    
3
  
Net periodic benefit cost
   $
12
     $
100