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Acquisitions And Dispositions (Tables) | 12 Months Ended
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Dec. 31, 2018
Acquisitions And Dispositions [Abstract] |
Summarized Results Of, And Assets And Liabilities Attributable To, Discontinued Operations | Summarized Results of Discontinued Operations
﻿ |  |  |  |  |  |  |  |
﻿ | Year Ended December 31,
﻿ | 2018 |  | 2017 |  | 2016
﻿ | (in thousands)
﻿Operating costs and expenses: |  |  |  |  |  |  |  |
﻿Exploration expense | $ | — |  | $ | — |  | $ | 15,137
﻿Depreciation, depletion and amortization |  | — |  |  | — |  |  | 9
﻿General and administrative expense |  | 467 |  |  | 615 |  |  | 1,269
﻿Bad debt recovery and other |  | — |  |  | — |  |  | (7,629)
﻿Total operating costs, expenses and (recovery) |  | 467 |  |  | 615 |  |  | 8,786
﻿Other operating loss, net |  | — |  |  | — |  |  | (172)
﻿Operating loss |  | (467) |  |  | (615) |  |  | (8,958)
﻿Other income (expense): |  |  |  |  |  |  |  |
﻿Interest income |  | — |  |  | — |  |  | 3,201
﻿Other, net |  | (29) |  |  | (3) |  |  | 552
﻿Total other income (expense) |  | (29) |  |  | (3) |  |  | 3,753
﻿Loss from discontinued operations before income taxes |  | (496) |  |  | (618) |  |  | (5,205)
﻿Income tax expense |  | — |  |  | 3 |  |  | 3,078
﻿Loss from discontinued operations | $ | (496) |  | $ | (621) |  | $ | (8,283)
﻿ Assets and Liabilities Attributable to Discontinued Operations
﻿ |  |  |  |  |  |
﻿ |  | As of December 31,
﻿ |  | 2018 |  | 2017
﻿ |  | (in thousands)
﻿ASSETS |  |  |  |  |  |
﻿Accounts with joint venture owners |  | $ | 3,290 |  | $ | 2,836
﻿Total current assets |  |  | 3,290 |  |  | 2,836
﻿Total assets |  | $ | 3,290 |  | $ | 2,836
﻿ |  |  |  |  |  |
﻿LIABILITIES |  |  |  |  |  |
﻿Current liabilities: |  |  |  |  |  |
﻿Accounts payable |  | $ | 73 |  | $ | 158
﻿Accrued liabilities and other |  |  | 15,172 |  |  | 15,189
﻿Total current liabilities |  |  | 15,245 |  |  | 15,347
﻿Total liabilities |  | $ | 15,245 |  | $ | 15,347
﻿

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