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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2020
Stockholders' Equity [Abstract] |
Reclassification From Accumulated Other Comprehensive Income (Loss) |
| Year Ended December 31, |  | Statements of Operations
| 2020 |  | 2019 |  | 2018 |  | Classification
Gains (losses) on cash flow hedges: |  |  |  |  |  |  |  |  |  |
Commodity derivatives | $ | 5,538 |  | $ | - |  | $ | 3,648 |  | (1)
Commodity derivatives |  | (2,115) |  |  | - |  |  | 1,258 |  | (2)
Total gains on cash flow hedges from continuing operations |  | 3,423 |  |  | - |  |  | 4,906 |  | (3)
Gains (losses) on cash flow hedges from discontinued operations, net of income taxes |  | - |  |  | 38,795 |  |  | (10,092) |  | (4)
Income tax expense |  | 857 |  |  | - |  |  | 1,483 |  | (5)
Amounts reclassified from accumulated other comprehensive income (loss) | $ | 2,566 |  | $ | 38,795 |  | $ | (6,669) |  |
(1)Revenues (2)Costs of goods sold (3)Income (loss) from continuing operations before income taxes and income (loss) from equity method investees (4)Net income from discontinued operations, net of income taxes (5)Income tax benefit

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