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Supplemental Oil and Gas Disclosures (Unaudited) Summary of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 1,399,134 | $ 1,401,638 | $ 1,409,409 | $ 1,191,335 | $ 879,112 | $ 909,781 | $ 856,396 | $ 765,439 | $ 5,401,516 | $ 3,410,728 | $ 2,443,066
Expenses |  |  |  |  |  |  |  |  |  |  |
Results of operations of oil and gas producing activities |  |  |  |  |  |  |  |  | (153,722) | 23,811 | 13,093
Company |  |  |  |  |  |  |  |  |  |  |
Expenses |  |  |  |  |  |  |  |  |  |  |
Production costs |  |  |  |  |  |  |  |  | 87 | 191 | 29
Depletion and amortization |  |  |  |  |  |  |  |  | 6 | 17 | 66
Results of operations of oil and gas producing activities |  |  |  |  |  |  |  |  | 63 | (157) | 193
Company's Share of Laramie Energy |  |  |  |  |  |  |  |  |  |  |
Expenses |  |  |  |  |  |  |  |  |  |  |
Production costs |  |  |  |  |  |  |  |  | 41,446 | 42,706 | 32,606
Impairment of proved properties |  |  |  |  |  |  |  |  | 163,401 | 0 | 0
Depletion and amortization |  |  |  |  |  |  |  |  | 38,011 | 26,819 | 21,277
Results of operations of oil and gas producing activities |  |  |  |  |  |  |  |  | (153,785) | 23,968 | 12,900
Oil and Gas | Company |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 156 | 51 | 288
Oil and Gas | Company's Share of Laramie Energy |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 89,073 | $ 93,493 | $ 66,783

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