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Business Segment Information (Schedule Of Segment Information) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  | $ 347,264 gel_SegmentMargin | [1] | $ 280,360 gel_SegmentMargin | [1] | $ 262,333 gel_SegmentMargin | [1]
Revenues | 847,282 us-gaap_Revenues | 964,114 us-gaap_Revenues | 1,015,049 us-gaap_Revenues | 1,019,719 us-gaap_Revenues | 961,035 us-gaap_Revenues | 1,090,293 us-gaap_Revenues | 1,068,694 us-gaap_Revenues | 1,014,808 us-gaap_Revenues | 3,846,164 us-gaap_Revenues |  | 4,134,830 us-gaap_Revenues |  | 3,367,361 us-gaap_Revenues |
Capital Expenditures |  |  |  |  |  |  |  |  | 644,548 gel_CapitalExpenditures | [2] | 704,205 gel_CapitalExpenditures | [2] | 426,298 gel_CapitalExpenditures | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  | 3,846,164 gel_ExternalCustomerRevenues |  | 4,134,830 gel_ExternalCustomerRevenues |  | 3,367,361 gel_ExternalCustomerRevenues |
IntersegmentRevenues |  |  |  |  |  |  |  |  | 0 gel_IntersegmentRevenues | [3] | 0 gel_IntersegmentRevenues | [3] | 0 gel_IntersegmentRevenues | [3]
Pipeline Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  | 61,231 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 64,349 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 58,039 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember | [1]
Revenues |  |  |  |  |  |  |  |  | 83,157 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 82,585 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 70,782 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |
Capital Expenditures |  |  |  |  |  |  |  |  | 46,611 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 130,787 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 59,345 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  | 66,760 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 65,452 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 56,198 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |
IntersegmentRevenues |  |  |  |  |  |  |  |  | 16,397 gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 17,133 gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 14,584 gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |
Offshore Pipeline Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  | 71,598 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |  | 44,530 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |  | 38,500 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember | [1]
Revenues |  |  |  |  |  |  |  |  | 3,296 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |  | 3,923 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |  | 5,508 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |
Capital Expenditures |  |  |  |  |  |  |  |  | 37,639 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |  | 94,286 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |  | 269,365 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  | 3,296 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |  | 3,923 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |  | 5,508 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |
IntersegmentRevenues |  |  |  |  |  |  |  |  | 0 gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |  | 0 gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |  | 0 gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_OffshorePipelineTransportationMember |
Refinery Services [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  | 84,851 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |  | 75,361 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |  | 72,883 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember | [1]
Revenues |  |  |  |  |  |  |  |  | 207,401 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |  | 205,985 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |  | 196,017 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |
Capital Expenditures |  |  |  |  |  |  |  |  | 2,385 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |  | 3,258 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |  | 2,692 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  | 218,297 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |  | 216,860 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |  | 205,110 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |
IntersegmentRevenues |  |  |  |  |  |  |  |  | (10,896)gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |  | (10,875)gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |  | (9,093)gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_RefineryServicesMember |
Marine Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  | 86,239 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |  | 47,726 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |  | 37,528 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember | [1]
Revenues |  |  |  |  |  |  |  |  | 229,282 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |  | 152,542 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |  | 118,204 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |
Capital Expenditures |  |  |  |  |  |  |  |  | 232,783 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |  | 260,736 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |  | 37,188 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  | 214,039 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |  | 131,049 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |  | 99,016 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |
IntersegmentRevenues |  |  |  |  |  |  |  |  | 15,243 gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |  | 21,493 gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |  | 19,188 gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_MarineTransportationMember |
Supply And Logistics [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment margin |  |  |  |  |  |  |  |  | 43,345 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |  | 48,394 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |  | 55,383 gel_SegmentMargin / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember | [1]
Revenues |  |  |  |  |  |  |  |  | 3,323,028 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |  | 3,689,795 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |  | 2,976,850 us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |
Capital Expenditures |  |  |  |  |  |  |  |  | 325,130 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |  | 215,138 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |  | 57,708 gel_CapitalExpenditures / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember | [2]
ExternalCustomerRevenues |  |  |  |  |  |  |  |  | 3,343,772 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |  | 3,717,546 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |  | 3,001,529 gel_ExternalCustomerRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |
IntersegmentRevenues |  |  |  |  |  |  |  |  | (20,744)gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |  | (27,751)gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |  | (24,679)gel_IntersegmentRevenues / us-gaap_StatementBusinessSegmentsAxis = gel_SupplyAndLogisticsMember |
SEKCO [Member] | Pipeline Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Expenditures |  |  |  |  |  |  |  |  | 36,100 gel_CapitalExpenditures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gel_SekcoMember / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  | 94,300 gel_CapitalExpenditures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gel_SekcoMember / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |  |  |
Gulf Of Mexico Crude Oil Pipelines [Member] | Pipeline Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Expenditures |  |  |  |  |  |  |  |  |  |  |  |  | $ 205,600 gel_CapitalExpenditures / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = gel_GulfOfMexicoCrudeOilPipelinesMember / us-gaap_StatementBusinessSegmentsAxis = gel_OnshorePipelineTransportationMember |
[1] | A reconciliation of Segment Margin to income from continuing operations before income taxes 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 internal growth projects) as well as acquisitions of businesses and interests in equity investees. In addition to construction of internal growth projects, capital spending in our Offshore pipeline transportation segment included $36.1 million and $94.3 million during the years ended December 31, 2014 and December 31, 2013 representing capital contributions to our SEKCO equity investee to fund our share of the construction costs for its pipeline. 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. During 2012, capital spending in our pipeline transportation segment also included $205.6 million for the acquisition of interests in several Gulf of Mexico pipelines
[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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- Definition Revenues less product costs, operating expenses (excluding non-cash charges such as depreciation and amortization), and segment general and administrative expenses, plus our equity in distributable cash generated by our equity investees. Also excludes the non-cash effects of our stock appreciation rights compensation plan and includes the non-income portion of payments received under direct financing leases. + References No definition available. + Details
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