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Note G - Pension and Other Postretirement Benefit Plans (Tables)
 6 Months Ended
Dec. 27, 2019
Notes Tables  
Schedule of Net Funded Status [Table Text Block]
   
For the Quarter Ended
    
For the Two Quarters Ended
  
   
12/27/2019
    
12/28/2018
    
12/27/2019
    
12/28/2018
  
Pension Benefits:
                                
Service cost
   $
194
     $
251
     $
406
     $
497
  
Interest cost
    
889
      
1,083
      
1,794
      
2,175
  
Expected return on plan assets
    
(1,240
 )    
(1,333
 )    
(2,488
 )    
(2,664
 )
Amortization of transition obligation
    
9
      
9
      
17
      
17
  
Amortization of prior service cost
    
(4
 )    
1
      
(7
 )    
2
  
Amortization of actuarial net loss
    
784
      
678
      
1,568
      
1,355
  
Net periodic benefit cost
   $
632
     $
689
     $
1,290
     $
1,382
  
                                 
Postretirement Benefits:
                                
Service cost
   $
4
     $
5
     $
9
     $
9
  
Interest cost
    
55
      
76
      
110
      
152
  
Amortization of prior service cost
    
(69
 )    
-
      
(138
 )    
-
  
Amortization of actuarial net loss
    
-
      
(69
 )    
-
      
(137
 )
Net periodic benefit (gain) cost
   $
(10
 )   $
12
     $
(19
 )   $
24