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Inventory - Schedule of Inventory (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Inventory |  |
Equipment and materials | $ 23,713 | $ 25,103
Crude oil inventory | 5,710 | 8,826
Total inventory | 29,423 | 33,929
Long-term inventory |  |
Linefill in third party pipelines | 15,805 | 14,522
Total long-term inventory | 15,805 | 14,522
Total | $ 45,228 | $ 48,451

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