4 . Segment Information We have two reportable segments : our Owned and Operated Mines segment and our Logistics and Related Activities segment. Our Owned and Operated Mines segment is characterized by the predominant focus on thermal coal production where the sale occurs at the mine site and where title and risk of loss generally pass to the customer at that point. This segment includes our Antelope Mine, Cordero Rojo Mine, and Spring Creek Mine. Sales in this segment are primarily to dom estic electric utilities and some industrials , although a portion may be made to our Logistics and Related Activities segment. S ales between reportable segments are priced based on prevailing market prices for arms length transactions. Our mines utilize surface mining extraction processes and are all located in the PRB. The gains and losses resulting from any domestic coal futures contracts and WTI derivative financial instruments are reported within this segment. Our Logistics and Related Activities segment is characterized by the services we provide to our international and certain of our domestic customers where we deliver coal to the customer at a terminal or the customers plant or other delivery point, remote from our mine site. Services provide d include the purchase of coal from third parties or from our Owned and Operated Mines segment, at market prices, as well as the contracting and coordination of the transportation and other handling services from third-party operators, which are typically rail and terminal companies and may include chartering of a vessel. Title and risk of loss are retained by the Logistics and Related Activities segment through the transportation and delivery process. Title and risk of loss pass to the customer in accord ance with the contract and typically occur at a vessel loading terminal, a vessel unloading terminal or an end use facility. Risk associated with rail and terminal take-or-pay agreements is also borne by the Logistics and Related Activities segment. The gains and losses resulting from any international coal forward contracts and international coal put options are reported within this segment. Amortization related to the amended port and rail take-or-pay agreements are also included in this segment. See Note 5 for additional information about the amended transportation agreements. Incremental production taxes and royalties associated with the sales made by our Logistics and Related Activities segment are also included in this segment. Our bu siness activities that are not considered operating segments are included in Other , although they are not required to be included in this footnote. They are provided for reconciliation purposes and include Selling, general and administrative expenses (SG&amp;A) as well as results relating to broker activity. Eliminations represent the purchase and sale of coal between reportable segments and the associated elimination of intercompany profit or loss in inventory and are provided for reconciliation purp oses. Revenue The following table presents Revenue (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2019 2018 2019 2018 Owned and Operated Mines $ 173,693 $ 161,977 $ 431,630 $ 459,570 Logistics and Related Activities 65,831 90,982 140,731 249,951 Other  3  8 Eliminations (19,297) (19,882) (38,606) (54,442) Consolidated $ 220,227 $ 233,080 $ 533,755 $ 655,087 Total Assets The following table presents Total assets (in thousands): September 30, December 31, 2019 2018 Owned and Operated Mines $ 104,039 $ 735,022 Logistics and Related Activities 31,863 29,327 Other 192,413 164,879 Eliminations (1,653) (572) Consolidated $ 326,662 $ 928,656 As of September 30, 2019 and December 31, 2018 , all of our long-lived assets were located in the U.S. The change in Total assets , from December 31, 2018 to September 30, 2019 , is primarily due to the impairment charge as described in Note 6 . Capital Expenditures The following table presents purchases of property, plant and equipment, investment in development projects, and capital expenditures included in Property, plant and equipment, net , Other assets , and Accounts payable (in thousands): Nine Months Ended September 30, 2019 2018 Owned and Operated Mines $ 3,434 $ 14,224 Logistics and Related Activities   Other 108 299 Consolidated $ 3,542 $ 14,523 Adjusted EBITDA EBITDA represents net income (loss) before: (1) interest income (expense) net, (2) income tax provision, (3) depreciation and depletion, and (4) amortization. Adjusted EBITDA represents EBITDA as further adjusted for accretion, which represents non-cash increases in asset retirement obligation liabilities resulting from the passage of time, and specifically identified items that management believes do not directly reflect our core operations. The specifi cally identified items that we routinely adjust for are: (1) adjustments to exclude non-cash impairment charges, (2) adjustments for derivative financial instruments, excluding fair value mark-to-market gains or losses and including derivative settlements , (3) adjustments to exclude debt restructuring costs, (4) non-cash amortization expense related to transportation agreements with BNSF and Westshore , and (5) reorganization items incurred since our filing for Chapter 11. Adjusted EBITDA is an additional tool intended to assist our management in comparing our performanc e on a consistent basis for purposes of business decision making by removing the impact of certain items that management believes do not directly reflect our core operations. Adjusted EBITDA is a metric intended to assist management in evaluating operatin g performance, compensation decisions, comparing performance across periods, planning and forecasting future business operations and helping determine levels of operating and capital investments. The following table reconciles segment Adjusted EBITDA to In come (loss) before income tax provision and earnings from unconsolidated affiliates (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2019 2018 2019 2018 Adjusted EBITDA Owned and Operated Mines $ 31,499 $ 32,289 $ 37,665 $ 56,195 Logistics and Related Activities (2,679) 10,471 (11,217) 24,858 Total Adjusted EBITDA for reportable segments 28,820 42,760 26,448 81,053 Unallocated net expenses (8,605) (2,059) (41,133) (21,487) Adjustments to Income (loss) before income tax provision and earnings from unconsolidated affiliates Depreciation and depletion 2,488 (17,392) (20,095) (46,788) Accretion (1,699) (1,947) (4,796) (5,359) Impairments   (621,005) (800) Reorganization items, net (13,152)  24,038  Derivative financial instruments: Gain (loss) on derivative financial instruments (1)  730 1,809 730 Settlement of derivative financial instruments   (1,809)  Total derivative financial instruments  730  730 Interest expense, net (1,787) (8,107) (14,167) (27,300) (Income) loss from unconsolidated affiliates, net of tax (24) (3) (890) (269) Non-cash throughput amortization expense and contract termination payments (1,288) (1,288) (3,865) (4,668) Income (loss) before income tax provision and earnings from unconsolidated affiliates $ 4,753 $ 12,693 $ (655,466) $ (24,886) (Gain) loss on derivative financial instruments reflected in the Unaudited Condensed Consolidate d Statements of Operations and Comprehensive Income (Loss).