Property and Equipment, net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Property, Plant and Equipment [Line Items]
Depreciation	$ 5.7	$ 5.8	$ 4.7
Furniture and Fixtures, Gross	5.2	6.0
Capitalized Computer Software, Gross	6.2	6.0
Machinery and Equipment, Gross	10.9	10.2
Leasehold Improvements, Gross	9.3	9.6
Property, Plant and Equipment, Gross	31.6	31.8
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	15.7	14.3
Property, Plant and Equipment, Net	$ 15.9	$ 17.5
Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	3 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	10 years