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Discontinued Operations (Tables) | 6 Months Ended
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Jun. 30, 2019
Discontinued Operations and Disposal Groups [Abstract] |
Schedule of Major Classes of Assets and Liabilities |
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Revenue | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 12,346 |
COSTS AND EXPENSES |  |  |  |  |  |  |
Costs applicable to sales(1) | — |  |  | — |  |  | — |  |  | 12,269 |
General and administrative | — |  |  | — |  |  | — |  |  | 41 |
Pre-development, reclamation, and other | — |  |  | — |  |  | — |  |  | 265 |
OTHER INCOME (EXPENSE), NET |  |  |  |  |  |  |
Interest expense, net of capitalized interest | — |  |  | — |  |  | — |  |  | (3 | )
Other, net | — |  |  | — |  |  | — |  |  | (260 | )
Pretax profit (loss) on discontinued operations related to major classes of pretax profit (loss) | — |  |  | — |  |  | — |  |  | (492 | )
Pretax gain on the disposal of the discontinued operation | — |  |  | — |  |  | 5,693 |  |  | 1,525 |
Total pretax gain or loss on discontinued operations | — |  |  | — |  |  | 5,693 |  |  | 1,033 |
Income and mining tax (expense) benefit | — |  |  | — |  |  | — |  |  | (483 | )
Income (loss) from discontinued operations | $ | — |  |  | $ | — |  |  | $ | 5,693 |  |  | $ | 550 |
(1) Excludes amortization.

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