Amount 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.

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

Separation Costs (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Separation Costs (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring and other, net	$ 1,400	$ 1,400	$ 11	$ 787
Separation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other, net	$ 1,400