Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Taxes [Abstract]
Deferred Tax Assets, Valuation Allowance	$ 3.2		$ 3.2		$ 3.2
Income (Loss) from Continuing Operations before Income Taxes, Domestic					$ 17.7	$ (18.4)	$ (24.5)
Deferred Tax Liabilities, Gross	2.4		2.4
Deferred Tax Liabilities, Unrealized Gains on Trading Securities	1.0		1.0
Income Tax Expense (Benefit)	$ 5.5	$ 5.1	$ 8.8	$ 9.3
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	28.00%		27.00%	29.00%