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Prepaid and Other Current Assets (Tables)

12 Months Ended

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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Tabular disclosure of the carrying amounts of other current assets.

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