Inventories (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Inventory [Line Items]
Crude oil and feedstocks	$ 108,233,000	$ 266,020,000
Refined products and blendstock	148,932,000	286,703,000
Warehouse stock and other	62,375,000	63,149,000
Total	319,540,000	615,872,000
RINs and environmental obligations	38,300,000	22,800,000
Reserves for the lower of cost or market value of inventory	176,400,000	0
LIFO reserve	0	6,400,000
Titled Inventory
Inventory [Line Items]
Crude oil and feedstocks	34,527,000	117,717,000
Refined products and blendstock	76,506,000	127,966,000
Warehouse stock and other	62,375,000	63,149,000
Total	173,408,000	308,832,000
Supply and Offtake Agreements
Inventory [Line Items]
Crude oil and feedstocks	73,706,000	148,303,000
Refined products and blendstock	72,426,000	158,737,000
Warehouse stock and other	0	0
Total	146,132,000	307,040,000
Renewable Identification Numbers “RINs”
Inventory [Line Items]
Warehouse stock and other	$ 17,800,000	$ 19,100,000