Derivatives - Schedule of Pre-Tax Gain (Loss) Recognized in the Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Commodity derivatives | Cost of revenue
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gains (losses)	$ 1,860	$ (4,836)	$ (54,160)	$ (8,095)
J. Aron repurchase obligation derivative | Cost of revenue
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gains (losses)	44,556	(2,638)	(12,459)	(6,558)
MLC terminal obligation derivative | Cost of revenue
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gains (losses)	6,000	4,656	62,076	1,317
Interest rate derivatives | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Pre-tax gains (losses)	$ 2	$ (415)	$ (2,310)	$ (1,885)