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Note 13. Postemployment Benefits (Tables)
 9 Months Ended
Mar. 31, 2019
Postemployment Benefits [Abstract]  
Schedule of Changes in Projected Benefit Obligations
The components of net periodic postemployment benefit cost applicable to our severance plans were as follows:
 
Three Months Ended
 
Nine Months Ended
 
March 31
 
March 31
(Amounts in Thousands)
2019
 
2018
 
2019
 
2018
Service cost
$
126

 
$
132

 
$
379

 
$
398

Interest cost
23

 
20

 
70

 
62

Amortization of actuarial income
(100
)
 
(58
)
 
(302
)
 
(191
)
Net periodic benefit cost
$
49

 
$
94

 
$
147

 
$
269