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Inventory- Schedule of Inventory (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Inventory |  |
Crude oil inventory | $ 6,934 | $ 7,086
Equipment and materials | 10,235 | 3,562
Total inventory | 17,169 | 10,648
Long-term inventory |  |
Linefill in third-party pipelines | 10,885 | 0
Long-term inventory | 10,885 | 0
Total | $ 28,054 | $ 10,648

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