XML 41 R30.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Prepaid and Other Current Assets (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Prepaid and Other Current Assets | Prepaid and other current assets at June 30, 2018 and December 31, 2017 consisted of the following (in thousands):
| June 30, 2018 |  | December 31, 2017
Advances to suppliers for crude oil purchases | $ | 70,387 |  |  | $ | — |
Collateral posted with broker for derivative instruments | 2,593 |  |  | 215 |
Prepaid insurance | 2,858 |  |  | 7,547 |
Derivative assets | 3,217 |  |  | 4,296 |
Other | 7,886 |  |  | 5,221 |
Total | $ | 86,941 |  |  | $ | 17,279 |

X
- References No definition available. + Details
Name: | us-gaap_DeferredCostsCapitalizedPrepaidAndOtherAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the carrying amounts of other current assets. + References No definition available. + Details
Name: | us-gaap_ScheduleOfOtherCurrentAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration