Restructuring Costs (Details) $ in Thousands	12 Months Ended
Sep. 30, 2017 USD ($)
Restructuring and Related Activities [Abstract]
Non-cash restructuring costs	$ 5,048
Asset impairment costs	4,786
Accelerated depreciation costs	262
Workforce reduction costs incurred	215
Workforce reduction costs paid	$ 15

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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

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