? 5. SEGMENT INFORMATION ? The company reports the financial and operating performance for the following four operating segments: (1) ethanol production, which includes the production of ethanol, distillers grains and corn oil, (2) agribusiness and energy services, which includes grain handling and storage, commodity marketing and merchant trading for company-produced and third-party ethanol, distillers grains, corn oil and other commodities, (3) food and ingredients, which includes cattle feeding and food-grade corn oil operations and included vinegar production until the sale of Fleischmanns Vinegar during the fourth quarter of 2018 and (4) partnership, which includes fuel storage and transportation services. ? Corporate activities include selling , general and administrative expenses, consisting primarily of compensation, professional fees and overhead costs not directly related to a specific operating segment. ? During the normal course of business, the operating segments conduct business with each other. For example, the agribusiness and energy services segment procures grain and natural gas and sells products, including ethanol, distillers grains and corn oil for the ethanol production segment. The partnership segment provides fuel storage and transportation services for the ethanol production segment. These intersegment activities are treated like third-party transactions with origination, marketing and storage fees charged at estimated market values. Consequently, these transactions affect segment performance; however, they do not impact the companys consolidated results since the revenues and corresponding costs are eliminated. ? The following tables set forth certain financial data for the companys operating segments (in thousands): ? ? ? ? Three Months Ended March 31, ? 2019 2018 ? Revenues: ? Ethanol production: ? Revenues from external customers $ 268,716 $ 563,763 ? Intersegment revenues 2,117 1,953 ? Total segment revenues 270,833 565,716 ? Agribusiness and energy services: ? Revenues from external customers 162,795 201,787 ? Intersegment revenues 6,413 11,429 ? Total segment revenues 169,208 213,216 ? Food and ingredients: ? Revenues from external customers 208,499 278,109 ? Intersegment revenues 38 42 ? Total segment revenues 208,537 278,151 ? Partnership: ? Revenues from external customers 2,305 1,628 ? Intersegment revenues 18,782 24,257 ? Total segment revenues 21,087 25,885 ? Revenues including intersegment activity 669,665 1,082,968 ? Intersegment eliminations (27,350) (37,681) ? Revenues as reported $ 642,315 $ 1,045,287 ? Refer to Note 2 - Revenue , for further disaggregation of revenue by operating segment. ? ? ? ? Three Months Ended March 31, ? 2019 2018 ? Cost of goods sold: ? Ethanol production $ 293,487 $ 564,559 ? Agribusiness and energy services 159,626 201,712 ? Food and ingredients 206,073 259,765 ? Partnership - - ? Intersegment eliminations (23,611) (37,701) ? $ 635,575 $ 988,335 ? ? ? ? Three Months Ended March 31, ? 2019 2018 ? Operating income (loss): ? Ethanol production $ (44,192) $ (27,529) ? Agribusiness and energy services 5,304 7,064 ? Food and ingredients (1,432) 12,585 ? Partnership 12,551 15,360 ? Intersegment eliminations (3,677) 68 ? Corporate activities (8,559) (11,473) ? $ (40,005) $ (3,925) ? ? ? ? Three Months Ended March 31, ? 2019 2018 ? EBITDA: ? Ethanol production $ (28,503) $ (7,095) ? Agribusiness and energy services 5,862 7,702 ? Food and ingredients 257 15,997 ? Partnership 13,771 16,623 ? Intersegment eliminations (3,677) 68 ? Corporate activities (6,379) (10,175) ? $ (18,669) $ 23,120 ? ? ? ? Three Months Ended March 31, ? 2019 2018 ? Depreciation and amortization: ? Ethanol production $ 15,340 $ 20,436 ? Agribusiness and energy services 549 630 ? Food and ingredients 1,611 3,404 ? Partnership 985 1,181 ? Corporate activities 750 823 ? $ 19,235 $ 26,474 ? The following table reconciles net loss to EBITDA (in thousands): ? ? ? ? Three Months Ended March 31, ? 2019 2018 ? Net loss $ (37,871) $ (19,455) ? Interest expense 14,427 22,128 ? Income tax benefit (14,460) (6,027) ? Depreciation and amortization (1) 19,235 26,474 ? EBITDA $ (18,669) $ 23,120 ? (1) Excludes the amortization of operating lease right-of-use assets and amortization of debt issuance costs. ? The following table sets forth total assets by operating segment (in thousands): ? ? ? ? March 31, 2019 December 31, 2018 ? Total assets (1) : ? Ethanol production $ 876,306 $ 872,845 ? Agribusiness and energy services 325,226 399,633 ? Food and ingredients 550,700 552,459 ? Partnership 102,805 67,297 ? Corporate assets 306,617 334,236 ? Intersegment eliminations (14,074) (10,038) ? $ 2,147,580 $ 2,216,432 ? (1) Asset balances by segment exclude intercompany balances .