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Discontinued Operations Financial Infomration for Discontinued Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract] |  |  |
Coal Revenue |  |  | $ 1,067,841
Other Outside Sales |  |  | 60,066
Freight-Outside Coal |  |  | 66,297
Miscellaneous Other Income |  |  | 73,645
Total Revenue and Other Income |  |  | 1,267,849
Total Costs |  |  | 1,147,254
Income from Operations Before Income Taxes |  |  | 120,595
Income Tax Expense |  |  | 23,984
Less: Net Income Attributable to Noncontrolling Interest |  |  | 10,903
Income from Discontinued Operations, net | $ 0 | $ 0 | $ 85,708

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