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Investment in Laramie Energy, LLC - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jul. 01, 2021 | Nov. 20, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Mar. 04, 2019 | Jan. 11, 2019 | Dec. 31, 2018
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt |  | $ 564,558,000 | $ 708,593,000 |  |  |  |  |  |  |  |  |
Impairment expense |  | $ 1,838,000 | 85,806,000 | $ 0 |  |  |  |  |  |  |  |
Laramie Energy Company |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  | $ 160,000,000 |  |  |  |  |  |  |
Impairment expense | $ 355,200,000 |  |  |  |  |  |  |  |  |  |  |
Disposal group, property, plant and equipment |  |  |  |  |  |  |  |  |  | $ 17,500,000 |  |
Term Loan B | Term Loan |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  | $ 250,000,000 |
Laramie Energy Company |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership of laramie energy, LLC |  | 46.00% |  |  |  |  |  |  |  |  |  |
Equity method investments, fair value |  |  |  |  |  |  |  | $ 1,900,000 | $ 51,800,000 |  |  |
Equity method investment, aggregate cost |  |  |  |  |  |  |  | $ 47,200,000 | $ 133,300,000 |  |  |
Impairment charge |  |  | 45,294,000 | 81,515,000 |  |  |  |  |  |  |  |
Impairment expense |  | $ 0 | 0 | 355,220,000 |  |  |  |  |  |  |  |
Investment in Laramie Energy, LLC | $ 46,905,000 |  | 0 | $ 46,905,000 |  |  | $ 0 |  |  |  |  | $ 136,656,000
Laramie Energy Company | Term Loan B | Term Loan |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term Debt |  | $ 140,100,000 |  |  |  |  |  |  |  |  |  |
Laramie Energy Company | Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line credit maximum borrowing amount |  |  | 400,000,000 |  |  |  |  |  |  |  |  |
Current borrowing capacity |  |  | 139,700,000 |  |  |  |  |  |  |  |  |
Balance outstanding on the revolving credit facility |  |  | $ 139,700,000 |  |  |  |  |  |  |  |  |
Laramie Energy Company | Revolving Credit Facility | Deficiency Loan |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line credit maximum borrowing amount |  |  |  |  |  | $ 140,000,000 |  |  |  |  |  |
Borrowing base deficiency |  |  |  |  |  | $ 60,000,000 |  |  |  |  |  |

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