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Equity Method Investments - Summarized Financial Information (Details) - USD ($) $ in Thousands | 8 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Red River |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Current assets | $ 9,278 | $ 9,278 |  |
Non-current assets | 381,778 | 381,778 |  |
Current liabilities | 8,291 | 8,291 |  |
Revenues | 38,352 |  |  |
Gross profit | 25,919 |  |  |
Operating income | 25,497 |  |  |
Net Income | 25,548 |  |  |
Joint Ventures |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Current assets | 29,476 | 29,476 | $ 15,450 |
Non-current assets | 262,300 | 262,300 | 240,852 |
Current liabilities | 6,391 | 6,391 | 4,362 |
Non-current liabilities | $ 8 | 8 | 0 |
Revenues |  | 48,703 | 35,050 | $ 28,805
Gross profit |  | 30,473 | 17,690 | 13,344
Operating income |  | 28,503 | 12,909 | 10,920
Net Income |  | $ 28,601 | $ 15,701 | $ 10,714

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