Note 13. Postemployment Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Components of Net Periodic Benefit Cost (before tax):
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