Inventories (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Inventory [Line Items]
Crude oil and feedstocks	$ 192,836,000	$ 266,020,000
Refined products and blendstock	171,335,000	286,703,000
Warehouse stock and other	63,508,000	63,149,000
Total	427,679,000	615,872,000
RINs and environmental obligations	68,900,000	22,800,000
Reserves for the lower of cost or market value of inventory	24,000,000.0	0
LIFO reserve		6,400,000
Titled Inventory
Inventory [Line Items]
Crude oil and feedstocks	94,718,000	117,717,000
Refined products and blendstock	85,881,000	127,966,000
Warehouse stock and other	63,508,000	63,149,000
Total	244,107,000	308,832,000
Supply and Offtake Agreements
Inventory [Line Items]
Crude oil and feedstocks	98,118,000	148,303,000
Refined products and blendstock	85,454,000	158,737,000
Warehouse stock and other	0	0
Total	183,572,000	307,040,000
Renewable Identification Numbers “RINs”
Inventory [Line Items]
Warehouse stock and other	$ 17,800,000	$ 19,100,000

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Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

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