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Note G - Pension and Other Postretirement Benefit Plans (Tables)
 9 Months Ended
Mar. 27, 2020
Notes Tables  
Schedule of Net Funded Status [Table Text Block]
   
For the Quarter Ended
    
For the Three Quarters Ended
  
   
March 27, 2020
    
March 29, 2019
    
March 27, 2020
     March 29, 2019  
Pension Benefits:
                                
Service cost
   $
205
     $
242
     $
612
     $
739
  
Interest cost
    
909
      
1,095
      
2,703
      
3,270
  
Expected return on plan assets
    
(1,245
 )    
(1,329
 )    
(3,733
 )    
(3,992
 )
Amortization of transition obligation
    
9
      
9
      
26
      
26
  
Amortization of prior service cost
    
(4
 )    
1
      
(11
 )    
3
  
Amortization of actuarial net loss
    
673
      
 678
      
2,241
      
 2,033
  
Net periodic benefit cost
   $
547
     $
696
     $
1,838
     $
2,079
  
                                 
Postretirement Benefits:
                                
Service cost
   $
4
     $
5
     $
13
     $
14
  
Interest cost
    
55
      
76
      
164
      
228
  
Amortization of prior service cost
    
(69
 )    
-
      
(206
 )    
-
  
Amortization of actuarial net loss
    
-
      
 (69
 )    
-
      
 (206
 )
Net periodic benefit (gain) cost
   $
(10
 )   $
12
     $
(29
 )   $
36