Rental Equipment - Additional Information (Details) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Rental Equipment (Textual) [Abstract]
Rental equipment depreciation expense	$ 12,400,000	$ 7,300,000	$ 5,500,000
Inventories transferred to rental equipment	$ 10,742,000	$ 4,902,000	$ 2,000,000