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Divestitures and Assets Held for Sale - Balance Sheet Data Related to Assets and Liabilities Held for Sale (Details) - Held for Sale - Well Services Exit $ in Thousands	Jun. 30, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Inventory	$ 580
Other property and equipment	67,617
Less: Accumulated depreciation and impairment	(66,817)
Total assets held for sale	$ 1,380

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