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Prepaid and Other Current Assets (Tables) | 6 Months Ended
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Jun. 30, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Prepaid and Other Current Assets | Prepaid and other current assets at June 30, 2020 and December 31, 2019 consisted of the following (in thousands):
| June 30, 2020 |  | December 31, 2019
Advances to suppliers | $ | 17,374 |  |  | $ | 27,635 |
Collateral posted with broker for derivative instruments (1) | 2,712 |  |  | 10,306 |
Prepaid insurance | 4,580 |  |  | 13,536 |
Derivative assets | 3,177 |  |  | 2,075 |
Other | 4,462 |  |  | 5,604 |
Total | $ | 32,305 |  |  | $ | 59,156 |
_________________________________________________________ (1) Our cash margin that is required as collateral deposits on our commodity derivatives cannot be offset against the fair value of open contracts except in the event of default. Please read Note 11—Derivatives for further information.

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