Rental Equipment (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Rental Equipment (Textual) [Abstract]
Rental equipment depreciation expense	$ 5.5	$ 2.8	$ 1.1
Inventories transferred to rental equipment	$ 2.0	$ 0.3