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Divestitures and Assets Held for Sale - Schedule of Assets and Liabilities Held for Sale (Details) - Held for Sale [Member] $ in Thousands | Jun. 30, 2018 USD ($)
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Williston Non-Op Divestiture [Member] |
Assets: |
Accounts receivable, net | $ 273
Oil and gas properties (successful efforts method) | 179,921
Less: accumulated depreciation, depletion, amortization and impairment | (61,652)
Total assets held for sale, net | 118,542
Liabilities: |
Asset retirement obligations | 1,605
Total liabilities held for sale | 1,605
Foreman Butte Divestiture [Member] |
Assets: |
Accounts receivable, net | 601
Inventory | 866
Oil and gas properties (successful efforts method) | 336,604
Other property and equipment | 11,865
Less: accumulated depreciation, depletion, amortization and impairment | (218,360)
Total assets held for sale, net | 131,576
Liabilities: |
Asset retirement obligations | 2,576
Total liabilities held for sale | $ 2,576

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