Business Segment Information We currently manage our businesses through four divisions that constitute our reportable segments:  Offshore pipeline transportation  offshore transportation of crude oil and natural gas in the Gulf of Mexico;  Sodium minerals and sulfur services  trona and trona-based exploring, mining, processing, producing, marketing and selling activities, as well as processing high sulfur (or sour) gas streams for refineries to remove the sulfur, and selling the related by-product, NaHS;  Onshore facilities and transportation  terminalling, blending, storing, marketing and transporting crude oil, petroleum products (primarily fuel oil, asphalt, and other heavy refined products) and CO 2 ;and  Marine transportation  marine transportation to provide waterborne transportation of petroleum products and crude oil throughout North America. Substantially all of our revenues are derived from, and substantially all of our assets are located in, the United States. We define Segment Margin as revenues less product costs, operating expenses (excluding non-cash gains and charges, such as depreciation, depletion and amortization), and segment general and administrative expenses, plus our equity in distributable cash generated by our equity investees. In addition, our Segment Margin definition excludes the non-cash effects of our long-term incentive compensation plan and includes the non-income portion of payments received under direct financing leases. Our chief operating decision maker (our Chief Executive Officer) evaluates segment performance based on a variety of measures including Segment Margin, segment volumes, where relevant, and capital investment. Segment information for the periods presented below was as follows: Offshore Pipeline Transportation Sodium Minerals &amp; Sulfur Services Onshore Facilities &amp; Transportation Marine Transportation Total Three Months Ended September 30, 2019 Segment margin (a) $ 81,060 $ 55,258 $ 24,829 $ 14,672 $ 175,819 Capital expenditures (b) $ 1,996 $ 26,415 $ 1,599 $ 12,741 $ 42,751 Revenues: External customers $ 79,738 $ 279,416 $ 205,913 $ 56,630 $ 621,697 Intersegment (c)  (1,889 ) (885 ) 2,774  Total revenues of reportable segments $ 79,738 $ 277,527 $ 205,028 $ 59,404 $ 621,697 Three Months Ended September 30, 2018 Segment margin (a) $ 70,963 $ 63,942 $ 36,189 $ 12,113 $ 183,207 Capital expenditures (b) $ 564 $ 20,819 $ 16,700 $ 4,936 $ 43,019 Revenues: External customers $ 70,115 $ 293,491 $ 327,844 $ 53,828 $ 745,278 Intersegment (c)  (1,769 ) (699 ) 2,468  Total revenues of reportable segments $ 70,115 $ 291,722 $ 327,145 $ 56,296 $ 745,278 Nine Months Ended September 30, 2019 Segment Margin (a) $ 233,978 $ 171,602 $ 86,352 $ 41,563 $ 533,495 Capital expenditures (b) $ 4,975 $ 75,258 $ 5,383 $ 29,665 $ 115,281 Revenues: External customers $ 236,482 $ 833,278 $ 640,716 $ 166,015 1,876,491 Intersegment (c)  (5,659 ) (3,086 ) 8,745  Total revenues of reportable segments $ 236,482 $ 827,619 $ 637,630 $ 174,760 $ 1,876,491 Nine Months Ended September 30, 2018 Segment Margin (a) $ 215,738 $ 192,875 $ 83,622 $ 35,066 $ 527,301 Capital expenditures (b) $ 2,665 $ 49,078 $ 52,559 $ 25,615 $ 129,917 Revenues: External customers $ 213,344 $ 881,822 $ 976,193 $ 152,115 2,223,474 Intersegment (c)  (5,309 ) (3,986 ) 9,295  Total revenues of reportable segments $ 213,344 $ 876,513 $ 972,207 $ 161,410 $ 2,223,474 Total assets by reportable segment were as follows: September 30, 2019 December 31, 2018 Offshore pipeline transportation $ 2,307,072 $ 2,359,013 Sodium minerals and sulfur services 1,991,392 1,844,845 Onshore facilities and transportation 1,435,504 1,431,910 Marine Transportation 771,235 800,243 Other assets 55,478 43,060 Total consolidated assets $ 6,560,681 $ 6,479,071 (a) A reconciliation of total Segment Margin to net income (loss) attributable to Genesis Energy, L.P. for the periods is presented below. (b) Capital expenditures include maintenance and growth capital expenditures, such as fixed asset additions (including enhancements to existing facilities and construction of growth projects) as well as contributions to equity investees. (c) Intersegment sales were conducted under terms that we believe were no more or less favorable than then-existing market conditions. Reconciliation of total Segment Margin to net income (loss) attributable to Genesis Energy, L.P: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 Total Segment Margin $ 175,819 $ 183,207 $ 533,495 $ 527,301 Corporate general and administrative expenses (15,276 ) (23,760 ) (39,878 ) (47,686 ) Depreciation, depletion, amortization and accretion (87,209 ) (94,522 ) (233,250 ) (252,392 ) Interest expense (54,673 ) (58,819 ) (165,881 ) (172,864 ) Adjustment to exclude distributable cash generated by equity investees not included in income and include equity in investees net income (1) (7,682 ) (7,552 ) (18,185 ) (26,646 ) Other non-cash items 9,880 (999 ) (7,223 ) (7,774 ) Cash payments from direct financing leases in excess of earnings (2,131 ) (1,931 ) (6,238 ) (5,654 ) Loss on extinguishment of debt    (3,339 ) Differences in timing of cash receipts for certain contractual arrangements (2) (1,249 ) 792 10,886 5,271 Gain on sale of assets  3,363  3,363 Non-cash provision for leased items no longer in use 461 181 833 42 Redeemable noncontrolling interest redemption value adjustments (3) (272 )  (272 )  Income tax expense (111 ) (283 ) (656 ) (914 ) Net income (loss) attributable to Genesis Energy, L.P. $ 17,557 $ (323 ) $ 73,631 $ 18,708 (1) Includes distributions attributable to the quarter and received during or promptly following such quarter. (2) Includes the difference in timing of cash receipts from customers during the period and the revenue we recognize in accordance with GAAP on our related contracts. (3) Includes distributions paid in kind attributable to the period and accretion on the redemption feature.