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Business Segment Information (Schedule Of Segment Information) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin | [1] |  |  |  |  |  |  |  |  | $ 476,585 | $ 347,264 | $ 280,360 |
Revenues |  | $ 491,011 | $ 572,334 | $ 656,327 | $ 526,857 | $ 847,282 | $ 964,114 | $ 1,015,049 | $ 1,019,719 | 2,246,529 | 3,846,164 | 4,134,830 |
Capital Expenditures | [2] |  |  |  |  |  |  |  |  | 2,007,611 | 644,548 | 704,205 |
ExternalCustomerRevenues |  |  |  |  |  |  |  |  |  | 2,246,529 | 3,846,164 | 4,134,830 |
IntersegmentRevenues | [3] |  |  |  |  |  |  |  |  | 0 | 0 | 0 |
Pipeline Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  |  | 58,919 | 61,231 | 64,349 | [1]
Revenues |  |  |  |  |  |  |  |  |  | 77,092 | 83,157 | 82,585 |
Capital Expenditures |  |  |  |  |  |  |  |  |  | 235,069 | 46,611 | 130,787 | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  |  | 64,524 | 66,760 | 65,452 |
IntersegmentRevenues |  |  |  |  |  |  |  |  |  | 12,568 | 16,397 | 17,133 |
Offshore Pipeline Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  |  | 197,723 | 71,598 | 44,530 | [1]
Revenues |  |  |  |  |  |  |  |  |  | 140,230 | 3,296 | 3,923 |
Capital Expenditures |  |  |  |  |  |  |  |  |  | 1,527,320 | 37,639 | 94,286 | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  |  | 140,230 | 3,296 | 3,923 |
IntersegmentRevenues |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 |
Refinery Services [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  |  | 80,246 | 84,851 | 75,361 | [1]
Revenues |  |  |  |  |  |  |  |  |  | 177,880 | 207,401 | 205,985 |
Capital Expenditures |  |  |  |  |  |  |  |  |  | 1,595 | 2,385 | 3,258 | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  |  | 187,257 | 218,297 | 216,860 |
IntersegmentRevenues |  |  |  |  |  |  |  |  |  | (9,377) | (10,896) | (10,875) |
Marine Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  |  | 103,222 | 86,239 | 47,726 | [1]
Revenues |  |  |  |  |  |  |  |  |  | 238,757 | 229,282 | 152,542 |
Capital Expenditures |  |  |  |  |  |  |  |  |  | 69,009 | 232,783 | 260,736 | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  |  | 230,192 | 214,039 | 131,049 |
IntersegmentRevenues |  |  |  |  |  |  |  |  |  | 8,565 | 15,243 | 21,493 |
Supply And Logistics [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  |  | 36,475 | 43,345 | 48,394 | [1]
Revenues |  |  |  |  |  |  |  |  |  | 1,612,570 | 3,323,028 | 3,689,795 |
Capital Expenditures |  |  |  |  |  |  |  |  |  | 174,618 | 325,130 | 215,138 | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  |  | 1,624,326 | 3,343,772 | 3,717,546 |
IntersegmentRevenues |  |  |  |  |  |  |  |  |  | (11,756) | (20,744) | $ (27,751) |
SEKCO [Member] | Pipeline Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Expenditures |  |  |  |  |  |  |  |  |  | $ 2,500 | $ 36,100 |  |
[1] | A reconciliation of Segment Margin to net income attributable to Genesis Energy, L.P. for each year is presented below.
[2] | 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 acquisitions of businesses and contributions to equity investees related to same. In addition to construction of growth projects, capital spending in our offshore pipeline transportation segment included $1.5 billion during the year ended December 31, 2015 to fund our Enterprise acquisition. Capital spending in this segment also included $2.5 million and $36.1 million during the years ended December 31, 2015 and December 31, 2014 representing capital contributions to our SEKCO pipeline to fund our share of the construction costs for its pipeline (as prior to our Enterprise acquisition in July 2015, we owned a 50% interest in the SEKCO pipeline with Enterprise owning the remaining 50%). During 2014, capital spending in our marine transportation segment included $157 million for our purchase of the M/T American Phoenix. During 2013, capital spending in our marine segment also included $230.9 million for the acquisition of our offshore marine transportation assets.
[3] | Intersegment sales were conducted under terms that we believe were no more or less favorable than then-existing market conditions.

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