This element represents the amount of equity in earnings of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

No definition available.

+ Details

Name:	gel_BusinessCombinationProFormaInformationIncomeLossFromEquityMethodInvestmentsOfAcquireeSinceAcquisitionDateActual
Namespace Prefix:	gel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=gel_GulfOfMexicoCrudeOilPipelineSystemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=gel_HornbeckAcquisitionMember
Namespace Prefix:
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Period Type:

Acquisitions (Schedule Of Selected Financial Information) (Details) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
American Phoenix Acquisition [Member]
Business Acquisition [Line Items]
Revenues	$ 3,038
Net income	454
Hornbeck Acquisition [Member]
Business Acquisition [Line Items]
Revenues		30,424
Net income		7,348
Gulf Of Mexico Crude Oil Pipeline Systems [Member]
Business Acquisition [Line Items]
Revenues			5,508
Equity in earnings of equity investees			13,118
Net income			$ 15,112