Three Months ended September 30, Nine Months ended September 30, 2017 2018 2017 2018 Asphalt Terminalling Services Service revenue: Third-party revenue $ 17,690 $ 6,921 $ 44,172 $ 18,693 Related-party revenue 14,464 5,211 41,301 17,512 Lease revenue: Third-party revenue  11,288  30,762 Related-party revenue  5,406  20,584 Product sales revenue: Related-party revenue  482  482 Total revenue for reportable segment 32,154 29,308 85,473 88,033 Operating expense, excluding depreciation and amortization 11,608 11,683 35,864 38,412 Operating margin, excluding depreciation and amortization $ 20,546 $ 17,625 $ 49,609 $ 49,621 Total assets (end of period) $ 142,571 $ 143,454 $ 142,571 $ 143,454 Crude Oil Terminalling Services Service revenue: Third-party revenue $ 5,162 $ 1,923 $ 17,013 $ 9,418 Intersegment revenue  222  392 Lease revenue: Third-party revenue  9  35 Total revenue for reportable segment 5,162 2,154 17,013 9,845 Operating expense, excluding depreciation and amortization 994 928 2,996 3,115 Operating margin, excluding depreciation and amortization $ 4,168 $ 1,226 $ 14,017 $ 6,730 Total assets (end of period) $ 68,985 $ 67,213 $ 68,985 $ 67,213 Three Months ended September 30, Nine Months ended September 30, 2017 2018 2017 2018 Crude Oil Pipeline Services Service revenue: Third-party revenue $ 2,196 $ 1,165 $ 7,520 $ 4,270 Related-party revenue  185 310 268 Lease revenue: Third-party revenue  40  452 Product sales revenue: Third-party revenue 2,375 97,763 8,252 146,882 Total revenue for reportable segment 4,571 99,153 16,082 151,872 Operating expense, excluding depreciation and amortization 3,056 3,094 9,438 8,420 Intersegment operating expense 77 1,644 321 3,243 Third-party cost of product sales 1,675 50,815 6,482 73,493 Related-party cost of product sales  44,106  67,853 Intersegment cost of product sales 150  150  Operating margin, excluding depreciation and amortization $ (387 ) $ (506 ) $ (309 ) $ (1,137 ) Total assets (end of period) $ 116,720 $ 171,841 $ 116,720 $ 171,841 Crude Oil Trucking Services Service revenue Third-party revenue $ 5,587 $ 2,734 $ 18,738 $ 11,783 Intersegment revenue 77 1,422 321 2,851 Lease revenue: Third-party revenue  31  160 Product sales revenue: Third-party revenue   385 10 Intersegment revenue 150  150  Total revenue for reportable segment 5,814 4,187 19,594 14,804 Operating expense, excluding depreciation and amortization 6,042 4,303 20,013 15,405 Operating margin, excluding depreciation and amortization $ (228 ) $ (116 ) $ (419 ) $ (601 ) Total assets (end of period) $ 9,781 $ 3,731 $ 9,781 $ 3,731 Total operating margin, excluding depreciation and amortization (1) $ 24,099 $ 18,229 $ 62,898 $ 54,613 Total Segment Revenues $ 47,701 $ 134,802 $ 138,162 $ 264,554 Elimination of Intersegment Revenues (227 ) (1,644 ) (471 ) (3,243 ) Consolidated Revenues $ 47,474 $ 133,158 $ 137,691 $ 261,311 ____________________ (1) The following table reconciles segment operating margin (excluding depreciation and amortization) to income before income taxes (in thousands): Three Months ended September 30, Nine Months ended September 30, 2017 2018 2017 2018 Operating margin, excluding depreciation and amortization $ 24,099 $ 18,229 $ 62,898 $ 54,613 Depreciation and amortization (7,680 ) (7,166 ) (23,586 ) (21,945 ) General and administrative expense (4,093 ) (4,322 ) (13,000 ) (13,029 ) Asset impairment expense  (15 ) (45 ) (631 ) Gain (loss) on sale of assets (107 ) (63 ) (986 ) 300 Interest expense (3,500 ) (4,090 ) (10,795 ) (12,683 ) Gain on sale of unconsolidated affiliate 1,112  5,284 2,225 Equity earnings in unconsolidated affiliate   61  Income before income taxes $ 9,831 $ 2,573 $ 19,831 $ 8,850