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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Inventories    
Crude Oil $ 575,714us-gaap_CrudeOilAndNaturalGasLiquids $ 581,592us-gaap_CrudeOilAndNaturalGasLiquids
Other raw materials and unfinished products 199,608hfc_EnergyRelatedInventoryOtherRawMaterialsandUnfinishedProducts [1] 204,467hfc_EnergyRelatedInventoryOtherRawMaterialsandUnfinishedProducts [1]
Finished products 614,546hfc_EnergyRelatedInventoryFinishedproducts [2] 531,523hfc_EnergyRelatedInventoryFinishedproducts [2]
Lower of cost or market reserve (390,932)us-gaap_InventoryValuationReserves (397,478)us-gaap_InventoryValuationReserves
Process chemicals 4,563us-gaap_EnergyRelatedInventoryChemicals [3] 4,028us-gaap_EnergyRelatedInventoryChemicals [3]
Repairs and maintenance supplies and other 112,179us-gaap_OtherInventory 110,999us-gaap_OtherInventory
Inventories, total $ 1,115,678us-gaap_InventoryNet $ 1,035,131us-gaap_InventoryNet
[1] Other raw materials and unfinished products include feedstocks and blendstocks, other than crude.
[2] Finished products include gasolines, jet fuels, diesels, lubricants, asphalts, LPG’s and residual fuels.
[3] Process chemicals include additives and other chemicals.Inventories, which are valued at the lower of LIFO cost or market, reflect a valuation reserve of $390.9 million and $397.5 million at March 31, 2015 and December 31, 2014, respectively. The December 31, 2014 market reserve of $397.5 million was reversed and reduced cost of products sold during the first quarter of 2015, due to the sale of inventory quantities that gave rise to the reserve. A new market reserve of $390.9 million was established as of March 31, 2015 based on market conditions and prices at that time.