Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Inventory [Line Items]
Crude oil and feedstocks	$ 244,290	$ 124,877
Refined products and blendstock	280,662	162,576
Warehouse stock and other	48,927	34,612
Total	573,879	322,065
Reserves for the lower of cost or market value of inventory	13,400	3,800
LIFO reserve	10,600
Titled Inventory
Inventory [Line Items]
Crude oil and feedstocks	71,058	7,000
Refined products and blendstock	121,955	62,401
Warehouse stock and other	48,927	34,612
Total	241,940	104,013
Supply and Offtake Agreements
Inventory [Line Items]
Crude oil and feedstocks	173,232	117,877
Refined products and blendstock	158,707	100,175
Warehouse stock and other	0	0
Total	331,939	218,052
Renewable Identification Numbers “RINs”
Inventory [Line Items]
Warehouse stock and other	$ 4,800	$ 5,000

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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 by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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Amount of valuation reserve for inventory.

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