Other Matters - Sale of Certain Assets (Details) $ in Thousands	3 Months Ended
Dec. 31, 2020 USD ($)
Receivables [Abstract]
Proceeds from sale of assets	$ 43,200
Holdback of certain proceeds	2,000
Gain on sale of certain assets	$ 12,100

Amount of cash inflow from the sale of other assets as part of operating activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585

Name:	us-gaap_ProceedsFromSaleOfOtherAssets1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration