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Derivatives - Schedule of Pre-Tax Gain (Loss) Recognized in the Statement of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Commodity derivatives | Cost of revenue |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Pre-tax gains (losses) | $ 781 | $ (2,755) | $ (56,378) | $ (3,259)
J. Aron repurchase obligation derivative | Cost of revenue |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Pre-tax gains (losses) | (10,370) | 13,388 | (57,015) | (3,919)
MLC terminal obligation derivative | Cost of revenue |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Pre-tax gains (losses) | (26,882) | 9,603 | 56,076 | (3,339)
Interest rate derivatives | Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Pre-tax gains (losses) | $ (292) | $ (1,471) | $ (2,312) |
Interest rate derivatives | Interest income |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Pre-tax gains (losses) |  |  |  | $ (1,470)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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