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Discontinued Operations and Disposal Groups - Balance Sheet Data Related to Assets and Liabilities Held for Sale (Details) - Held for Sale - 2019 Divestitures $ in Thousands | Sep. 30, 2019 USD ($)
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Oil and gas properties (successful efforts method) | $ 6,700
Less: accumulated depreciation, depletion, amortization and impairment | 0
Total assets held for sale, net | 6,700
Accrued liabilities | 6,700
Total liabilities held for sale | $ 6,700

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