Rental Equipment - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Rental Equipment [Abstract]
Rental equipment depreciation expense	$ 14,523	$ 13,948	$ 12,182
Inventories transferred to rental equipment	$ 3,982	$ 5,013	$ 10,742

This element represents equipment expense including depreciation, repairs, rentals, and service contract costs. This item also includes equipment purchases which do not qualify for capitalization in accordance with the entity's accounting policy. This item may also include furniture expenses.

No definition available.

Name:	us-gaap_EquipmentExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration