Derivatives - Fair Value Amounts of Derivatives and Placement in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Prepaid and other current assets
Derivative Instruments, Gain (Loss) [Line Items]
Cash collateral	$ 3,400	$ 1,500
Other non-current assets
Derivative Instruments, Gain (Loss) [Line Items]
Cash collateral	9,500	9,500
Commodity derivatives | Prepaid and other current assets
Derivative Instruments, Gain (Loss) [Line Items]
Asset (Liability)	34	1,346
Commodity derivatives | Other accrued liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Asset (Liability)	(6,308)	0
J. Aron repurchase obligation derivative | Obligations under inventory financing agreements | Over the Counter
Derivative Instruments, Gain (Loss) [Line Items]
Asset (Liability)	(29,584)	(20,797)
MLC terminal obligation derivative | Obligations under inventory financing agreements | Over the Counter
Derivative Instruments, Gain (Loss) [Line Items]
Asset (Liability)	(15,739)	(10,161)
Interest rate derivatives | Other accrued liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Asset (Liability)	0	(966)
Interest rate derivatives | Other liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Asset (Liability)	$ 0	$ (2,027)