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Acquisitions and Dispositions (Tables) | 12 Months Ended
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Dec. 31, 2020
Acquisitions and Dispositions [Abstract] |
Summarized Results, Assets and Liabilities Attributable to Discontinued Operations | Summarized Results of Discontinued Operations
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
| (in thousands)
Operating costs and expenses: |  |  |  |  |  |  |  |
Gain on settlement of drilling obligation | $ | — |  | $ | (7,193) |  | $ | —
General and administrative expense |  | 93 |  |  | 344 |  |  | 467
Total operating costs, expenses and (recovery) |  | 93 |  |  | (6,849) |  |  | 467
Operating income (loss) |  | (93) |  |  | 6,849 |  |  | (467)
Other expense: |  |  |  |  |  |  |  |
Other, net |  | (5) |  |  | — |  |  | (29)
Total other expense |  | (5) |  |  | — |  |  | (29)
Income (loss) from discontinued operations before income taxes |  | (98) |  |  | 6,849 |  |  | (496)
Income tax expense (benefit) |  | — |  |  | 1,438 |  |  | —
Income (loss) from discontinued operations | $ | (98) |  | $ | 5,411 |  | $ | (496)
Assets and Liabilities Attributable to Discontinued Operations
|  | As of December 31,
|  | 2020 |  | 2019
|  | (in thousands)
ASSETS |  |  |  |  |  |
Accounts with joint venture owners |  | $ | — |  | $ | —
Total current assets |  |  | — |  |  | —
Total assets |  | $ | — |  | $ | —
LIABILITIES |  |  |  |  |  |
Current liabilities: |  |  |  |  |  |
Accounts payable |  | $ | — |  | $ | 8
Accrued liabilities and other |  |  | 7 |  |  | 342
Total current liabilities |  |  | 7 |  |  | 350
Total liabilities |  | $ | 7 |  | $ | 350

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