Note 10. Accumulated Other Comprehensive Income - Reclassifications from Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Reclassification Adjustment from Accumulated Other Comprehensive Income
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	$ (28)	$ (23)	$ (57)	$ (46)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	(109)	(90)	(221)	(178)
Total Reclassification for the Period from AOCI	81	67	164	132
Non-operating income (expense), net
Reclassification Adjustment from Accumulated Other Comprehensive Income
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax	109	90	221	178
Benefit (Provision) for Income Taxes
Reclassification Adjustment from Accumulated Other Comprehensive Income
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	(28)	(23)	(57)	(46)
Net Income
Reclassification Adjustment from Accumulated Other Comprehensive Income
Total Reclassification for the Period from AOCI	$ 81	$ 67	$ 164	$ 132