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Income Taxes (Schedule Of Income Tax Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2020 | [1] | Sep. 30, 2020 | [1] | Jun. 30, 2020 | [1],[2] | Mar. 31, 2020 | [1] | Dec. 31, 2019 | [3] | Sep. 30, 2019 | [3] | Jun. 30, 2019 | [3] | Mar. 31, 2019 | [3] | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Taxes [Abstract] |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  | $ (37,047) | $ (2,177) | $ 7,758
Deferred |  |  |  |  |  |  |  |  | (13,336) | (18,881) | (24,484)
Total |  |  |  |  |  |  |  |  | (50,383) | (21,058) | (16,726)
Less: Income tax expense - discontinued operations |  |  |  |  |  |  |  |  |  | 258 | 3,421
Income tax expense (benefit) | $ (1,922) | $ 7,280 | $ (11,458) | $ (44,283) | $ 19,514 | $ (12,565) | $ (15,322) | $ (12,943) | $ (50,383) | $ (21,316) | $ (20,147)
[1] | The fourth quarter of 2020 includes the recognition of a $8.5 million valuation allowance which impacted income tax expense.
[2] | During the third quarter of 2020, the company identified an immaterial issue which resulted in the overstatement of both revenues and cost of goods sold within the agribusiness and energy services segment as previously reported for the three and six months ended June 30, 2020. The second quarter revenues and cost of goods sold reflected in the quarterly financial data have been revised to correct these amounts.
[3] | The fourth quarter of 2019 includes the recognition of a $25.9 million valuation allowance which impacted income tax expense.

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