Amount classified as assets attributable to disposal group held for sale or disposed of.

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Name:	us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Subsequent Events (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended	8 Months Ended	9 Months Ended
Subsequent Events (Details) - USD ($) $ in Thousands	Nov. 01, 2021	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Subsequent Event [Line Items]
Reduction in value of assets held for sale		$ 14,500	$ 12,400	$ 26,905	$ 109,591
Axis Energy Services [Member] \| Subsequent Event [Member] \| Superior Well Services [Member]
Subsequent Event [Line Items]
Discontinued operation, assets	$ 8,500
Reduction in value of assets held for sale	14,500
Working capital retained	$ 6,800