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Prepaid and Other Current Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Schedule of Other Current Assets | Prepaid and other current assets at December 31, 2017 and 2016 consist of the following (in thousands):
| December 31,
| 2017 |  | 2016
Advances to suppliers for crude oil purchases | $ | — |  |  | $ | 38,300 |
Collateral posted with broker for derivative instruments | 215 |  |  | 2,714 |
Prepaid insurance | 7,547 |  |  | 7,504 |
Derivative assets | 4,296 |  |  | 161 |
Other | 5,221 |  |  | 4,701 |
Total | $ | 17,279 |  |  | $ | 53,380 |

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- Definition Tabular disclosure of the carrying amounts of other current assets. + References No definition available. + Details
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