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Inventory
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Inventory Inventory
Crude oil inventory includes crude oil in tanks and linefill. Linefill that represents the minimum volume of product in a pipeline system that enables the system to operate is generally not available to be withdrawn from the pipeline system until the expiration of the transportation contract. Crude oil in tanks and linefill in third party pipelines that is expected to be withdrawn within one year is included in inventory on the Company’s Condensed Consolidated Balance Sheets, and crude oil linefill in third party pipelines that is not expected to be withdrawn within one year is included in long-term inventory on the Company’s Condensed Consolidated Balance Sheets.
Equipment and materials consist primarily of well equipment, tanks and tubular goods to be used in the Company’s exploration and production activities and spare parts and equipment for the Company’s midstream assets. Equipment and materials are included in inventory on the Company’s Condensed Consolidated Balance Sheets.
Inventory, including long-term inventory, is stated at the lower of cost and net realizable value with cost determined on an average cost method. The Company assesses the carrying value of inventory and uses estimates and judgment when making any adjustments necessary to reduce the carrying value to net realizable value. Among the uncertainties that impact the Company’s estimates are the applicable quality and location differentials to include in the Company’s net realizable value analysis as well as the liquidation timing of the inventory. Changes in assumptions made as to the timing of a sale can materially impact net realizable value. Due to lower commodity and market prices, the Company recorded impairment losses for the Company’s crude oil inventory, long-term linefill inventory and equipment and materials inventory of $7.2 million, $1.3 million and $1.0 million, respectively, to adjust the carrying values of the inventory to their estimated net realizable values during the six months ended June 30, 2020.
The Company’s total inventory consists of the following:
June 30, 2020December 31, 2019
 (In thousands)
Inventory
Crude oil inventory$8,400  $18,296  
Equipment and materials28,520  16,963  
Total inventory$36,920  $35,259  
Long-term inventory
Linefill in third party pipelines$14,173  $13,924  
Total long-term inventory$14,173  $13,924  
Total$51,093  $49,183