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Note G - Pension and Other Postretirement Benefit Plans (Tables)
9 Months Ended
Mar. 30, 2018
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
   
For the Quarter Ended
   
For the Three Quarters Ended
 
   
March 30, 2018
   
March 31, 2017
   
March 30, 2018
   
March 31, 2017
 
Pension Benefits:
                               
Service cost
  $
260
    $
238
    $
763
    $
718
 
Interest cost
   
1,089
     
1,130
     
3,225
     
3,373
 
Expected return on plan assets
   
(1,524
)    
(1,537
)    
(4,565
)    
(4,436
)
Amortization of transition obligation
   
9
     
8
     
27
     
26
 
Amortization of prior service cost
   
1
     
1
     
3
     
3
 
Amortization of actuarial net loss
   
759
     
900
     
2,277
     
2,698
 
Net periodic benefit cost
  $
594
    $
740
    $
1,730
    $
2,382
 
                                 
Postretirement Benefits:
                               
Service cost
  $
5
    $
6
    $
15
    $
19
 
Interest cost
   
78
     
123
     
247
     
367
 
Amortization of actuarial net loss
   
(59
)    
181
     
(115
)    
545
 
Net periodic benefit cost
  $
24
    $
310
    $
147
    $
931