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Note D - Other Comprehensive (Loss) Income (Tables)
 6 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Three Months Ended
   
Six Months Ended
 
   
December 31, 201
7
    
December 31, 201
7
  
   
 
 
 
  
Unrealized
    
 
 
 
  
 
 
 
  
Unrealized
    
 
 
 
   
Defined
    
Gains
    
 
 
 
  
Defined
    
Gains
    
 
 
 
   
Benefit
    
(Losses) on
    
 
 
 
  
Benefit
    
(Losses) on
    
 
 
 
   
Pension
    
Cash Flow
    
 
 
 
  
Pension
    
Cash Flow
    
 
 
 
   
Plan
    
Hedges
    
Total
    
Plan
    
Hedges
    
Total
  
Be
ginning Balance
   $
(491
)
   $
(1,548
)
   $
(2,039
)
   $
(491
)
   $
(414
)
   $
(905
)
OCI/OCL before reclassifications
    
-
      
(490
)
    
(490
)
    
-
      
(2,443
)
    
(2,443
)
Amounts reclassified from OCI
    
-
      
187
      
187
      
-
      
365
      
365
  
Tax effect of OCI activity
    
-
      
106
      
106
      
-
      
747
      
747
  
Net current period OCI/OCL
    
-
      
(197
)
    
(197
)
    
-
      
(1,331
)
    
(1,331
)
Ending Balance
   $
(491
)
   $
(1,745
)
   $
(2,236
)
   $
(491
)
   $
(1,745
)
   $
(2,236
)
   
Three Months Ended
   
Six Months Ended
 
   
December 31, 2016
    
December 31, 2016
  
   
 
 
 
  
Unrealized
    
 
 
 
  
 
 
 
  
Unrealized
    
 
 
 
   
Defined
    
Gains
    
 
 
 
  
Defined
    
Gains
    
 
 
 
   
Benefit
    
(Losses) on
    
 
 
 
  
Benefit
    
(Losses) on
    
 
 
 
   
Pension
    
Cash Flow
    
 
 
 
  
Pension
    
Cash Flow
    
 
 
 
   
Plan
    
Hedges
    
Total
    
Plan
    
Hedges
    
Total
  
Beginning Balance
   $
(775
)
   $
(295
)
   $
(1,070
)
   $
(775
)
   $
95
     $
(680
)
OCI/OCL before reclassifications
    
-
      
2,287
      
2,287
      
-
      
1,834
      
1,834
  
Amounts reclassified from OCI
    
-
      
(343
)
    
(343
)
    
-
      
(501
)
    
(501
)
Tax effect of OCI activity
    
-
      
(702
)
    
(702
)
    
-
      
(481
)
    
(481
)
Net current period OCI/OCL
    
-
      
1,242
      
1,242
      
-
      
852
      
852
  
Ending Balance
   $
(775
)
   $
947
     $
172
     $
(775
)
   $
947
     $
172