Significant Accounting Policies and Practices and Recent Accounting Pronouncements - Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Accounting Policies [Abstract]
Gain on contingent purchase price reduction	$ 0.5	$ 0	$ 41.0
Recognized income tax positions	50.00%