Note 13. Postemployment Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Components of Net Periodic Benefit Cost (before tax):
Service cost	$ 126	$ 131	$ 253	$ 266
Interest cost	24	21	47	42
Amortization of actuarial income	(103)	(66)	(202)	(133)
Net periodic benefit cost	$ 47	$ 86	$ 98	$ 175