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Inventories
 12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Inventories Inventories
    Inventories at December 31, 2020 and 2019 consisted of the following (in thousands):
Titled InventorySupply and Offtake Agreements (1)Total
December 31, 2020
Crude oil and feedstocks$88,307 $75,340 $163,647 
Refined products and blendstock112,146 83,601 195,747 
Warehouse stock and other (2)70,461 — 70,461 
Total$270,914 $158,941 $429,855 
December 31, 2019
Crude oil and feedstocks$117,717 $148,303 $266,020 
Refined products and blendstock127,966 158,737 286,703 
Warehouse stock and other (2)63,149 — 63,149 
Total$308,832 $307,040 $615,872 
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(1)Please read Note 11—Inventory Financing Agreements for further information.
(2)Includes $26.7 million and $19.1 million of RINs and environmental credits, reported at cost, as of December 31, 2020 and 2019, respectively. Our renewable volume obligation and other gross environmental credit obligations of $150.5 million and $22.8 million, reported at market value, are included in Other accrued liabilities on our consolidated balance sheets as of December 31, 2020 and 2019, respectively.
    As of December 31, 2020, there was $10.6 million reserve for the lower of cost and net realizable value of inventory. As of December 31, 2019, there was no reserve for the lower of cost and net realizable value of inventory. Our LIFO inventories, net of the lower of cost or net realizable reserve, were equal to current cost as of December 31, 2020. As of December 31, 2019, the current replacement cost exceeded the LIFO inventory carrying value by approximately $6.4 million.