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Segment Information - Reconciliation of Net Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Revenue from External Customer [Line Items] |  |
Segment Adjusted EBITDA | $ 69,824 | $ 187,053
Other revenues | 226,720 | 378,290
Cost of other revenues | (7,561) | (7,745)
Depreciation and depletion | (28,692) | (22,233)
Selling, general and administrative | (8,456) | (8,905)
Loss on early extinguishment of debt | 0 | (9,756)
Other income | 1,822 | 0
Interest expense, net | (7,533) | (8,592)
Income tax expense | (3,241) | (27,984)
Net income | 21,545 | 110,447
Other revenues |  |
Revenue from External Customer [Line Items] |  |
Other revenues | $ 5,382 | $ 8,609

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