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Supplemental Information on Oil and Natural Gas Producing Activities (Unaudited) - Results of Operations from Oil and Natural Gas Producing Activities (Unaudited) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Results of Operations for Oil and Gas Producing Activities |  |  |
Revenues | $ 266,845 | $ 349,395 | $ 357,299
Expenses |  |  |
Production costs | 110,711 | 112,173 | 116,372
Depreciation and depletion | 146,874 | 127,281 | 118,035
Impairment | 409,574 | 0 | 0
Total expenses | 667,159 | 239,454 | 234,407
Income (loss) before income taxes | (401,055) | 109,272 | 121,803
Income tax expense (benefit) | (105,477) | 28,520 | 47,722
Results of operations for oil and natural gas producing activities (excluding corporate overhead and interest costs) | (295,578) | 80,752 | 74,081
Oil, natural gas and NGL |  |  |
Results of Operations for Oil and Gas Producing Activities |  |  |
Revenues | $ 266,104 | $ 348,726 | $ 356,210

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