Rental Equipment - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Rental Equipment [Abstract]
Rental equipment depreciation expense	$ 13,900	$ 12,400	$ 7,300
Inventories transferred to rental equipment	$ 5,013	$ 10,742	$ 4,902