Note 15. Postemployment Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Components of Net Periodic Benefit Cost (before tax):
Service cost	$ 119	$ 126	$ 245	$ 253
Interest cost	18	24	37	47
Amortization of actuarial income	(90)	(103)	(178)	(202)
Net periodic benefit cost	$ 47	$ 47	$ 104	$ 98