Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Name:	us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Subsequent Event (Details) - USD ($) $ in Thousands		12 Months Ended
Subsequent Event (Details) - USD ($) $ in Thousands	Dec. 15, 2017	Sep. 30, 2017	Sep. 30, 2016
Subsequent Event [Line Items]
Gain on sale of building		$ (4,957)	$ (31)
Subsequent event
Subsequent Event [Line Items]
Proceeds from sale of building	$ 3,068
Buildings \| Subsequent event
Subsequent Event [Line Items]
Gain on sale of building	$ 1,100