Rental Equipment - Additional Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Rental Equipment (Textual) [Abstract]
Rental equipment depreciation expense	$ 7.3	$ 5.5	$ 2.8
Inventories transferred to rental equipment	$ 4.9	$ 2.0