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Business Segment Information (Reconciliation Of Segment Margin To (Loss) Income) (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] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital Expenditures |  |  |  |  |  |  |  |  | $ 644,548 gel_CapitalExpenditures | [1] | $ 704,205 gel_CapitalExpenditures | [1] | $ 426,298 gel_CapitalExpenditures | [1]
Segment margin |  |  |  |  |  |  |  |  | 347,264 gel_SegmentMargin | [2] | 280,360 gel_SegmentMargin | [2] | 262,333 gel_SegmentMargin | [2]
Corporate general and administrative expenses |  |  |  |  |  |  |  |  | (47,065)us-gaap_OtherGeneralAndAdministrativeExpense |  | (43,353)us-gaap_OtherGeneralAndAdministrativeExpense |  | (38,372)us-gaap_OtherGeneralAndAdministrativeExpense |
Depreciation, amortization and impairment |  |  |  |  |  |  |  |  | (90,908)us-gaap_DepreciationDepletionAndAmortization |  | (64,784)us-gaap_DepreciationDepletionAndAmortization |  | (61,150)us-gaap_DepreciationDepletionAndAmortization |
Interest income (expense), net |  |  |  |  |  |  |  |  | (66,639)us-gaap_InterestIncomeExpenseNet |  | (48,583)us-gaap_InterestIncomeExpenseNet |  | (40,923)us-gaap_InterestIncomeExpenseNet |
Distributable cash from equity investees in excess of equity in earnings |  |  |  |  |  |  |  |  | (31,093)gel_DistributableCashFromEquityInvesteesInExcessOfEquityInEarnings |  | (23,889)gel_DistributableCashFromEquityInvesteesInExcessOfEquityInEarnings |  | (24,464)gel_DistributableCashFromEquityInvesteesInExcessOfEquityInEarnings | [3]
Non-cash items not included in segment margin |  |  |  |  |  |  |  |  | 3,017 gel_NonCashExpensesNotIncludedInSegmentMargin |  | (7,551)gel_NonCashExpensesNotIncludedInSegmentMargin |  | (5,280)gel_NonCashExpensesNotIncludedInSegmentMargin |
Cash payments from direct financing leases in excess of earnings |  |  |  |  |  |  |  |  | (5,529)gel_CashPaymentsFromDirectFinancingLeasesInExcessOfEarnings |  | (5,110)gel_CashPaymentsFromDirectFinancingLeasesInExcessOfEarnings |  | (5,016)gel_CashPaymentsFromDirectFinancingLeasesInExcessOfEarnings |
Income tax (expense) benefit |  |  |  |  |  |  |  |  | (2,845)us-gaap_IncomeTaxExpenseBenefit |  | (845)us-gaap_IncomeTaxExpenseBenefit |  | 9,205 us-gaap_IncomeTaxExpenseBenefit | [4]
Discontinued Operations for Segment Margin Reconciliation |  |  |  |  |  |  |  |  | 0 gel_DiscontinuedOperationsforSegmentMarginReconciliation |  | (2,241)gel_DiscontinuedOperationsforSegmentMarginReconciliation |  | 1,004 gel_DiscontinuedOperationsforSegmentMarginReconciliation |
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest | 26,166 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 29,113 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 21,148 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 29,775 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 16,722 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 17,966 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 26,612 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 22,704 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 106,202 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest |  | 84,004 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest |  | 97,337 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest |
Pipeline Transportation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 | [1]
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 | [2]
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 |  |  |
[1] | 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
[2] | A reconciliation of Segment Margin to income from continuing operations before income taxes for each year is presented below.
[3] | (1) Includes distributions attributable to the quarter and received during or promptly following such quarter.
[4] | (1)Our discontinued operations had no income tax benefit or expense in any period presented.

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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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