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Inventories (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Inventory [Line Items]
Crude oil and feedstocks	$ 118,028,000	$ 149,984,000
Refined products and blendstock	211,213,000	172,422,000
Warehouse stock and other	29,340,000	22,951,000
Total	358,581,000	345,357,000
Reserves for the lower of cost or market value of inventory	0	0
Titled Inventory
Inventory [Line Items]
Crude oil and feedstocks	10,632,000	93,970,000
Refined products and blendstock	78,600,000	63,505,000
Warehouse stock and other	29,340,000	22,951,000
Total	118,572,000	180,426,000
Supply and Offtake Agreements
Inventory [Line Items]
Crude oil and feedstocks	107,396,000	56,014,000
Refined products and blendstock	132,613,000	108,917,000
Warehouse stock and other	0	0
Total	240,009,000	$ 164,931,000
Renewable Identification Numbers “RINs”
Inventory [Line Items]
Warehouse stock and other	$ 6,000,000

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The aggregate carrying amount as of the balance sheet date of unrefined petroleum and the liquid hydrocarbon components recovered from natural gas.

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Carrying amount as of the balance sheet date of finished goods inventories for petroleum products, crude oil, petrochemical products, and other oil and gas inventories.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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