Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Income Taxes [Abstract]
Deferred Tax Assets, Valuation Allowance	$ 3.2		$ 3.2		$ 2.8
Income (Loss) from Continuing Operations before Income Taxes, Domestic					$ 17.3	$ 24.5	$ 21.9
Deferred Tax Liabilities, Gross	3.9		3.9
Deferred Tax Liabilities, Unrealized Gains on Trading Securities	1.3		1.3
Income Tax Expense (Benefit)	$ 5.0	$ 0.3	$ 14.3	$ 4.4
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	29.00%	8.00%	29.00%