Note 3. Recent Accounting Pronouncements and Supplemental Information - Textuals (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Effective Income Tax Rate Reconciliation, Percent	10.50%	96.40%	28.10%	18.50%
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount				$ 0.7
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	1.1		1.1
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	0.4	0.4	0.4	0.4
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount			$ (0.4)