Income Taxes (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014
Income Tax Contingency [Line Items]
Valuation allowance increase		$ 1.8
Unrecognized tax benefits that would impact effective tax rate	$ 3.2		$ 3.2
Unrecognized tax benefits, income tax penalties and interest accrued	$ 1.8		$ 1.6
Minimum
Income Tax Contingency [Line Items]
Number of years open for tax examinations	3 years
Maximum
Income Tax Contingency [Line Items]
Number of years open for tax examinations	5 years