Net Investment In Direct Financing Leases (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2013
Leases [Abstract]
Fixed lease payments per year	$ 20.7
Fixed lease interest rate per year	10.25%
Minimum lease payments received, year one	21.2
Minimum lease payments received, year five	$ 20.7

Annual rate of interest earned under a direct financing lease.

No definition available.

Name:	gel_FixedLeaseInterestRatePerYear
Namespace Prefix:	gel_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fixed annual lease payments received under a direct financing lease.

+ References

No definition available.

+ Details

Name:	gel_FixedLeasePaymentsPerYear
Namespace Prefix:	gel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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

- Definition

Amount of minimum lease payments maturing in the fifth fiscal year following the latest fiscal year for sale-leaseback transactions accounted for using the deposit method or as a financing.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 40

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6456377&loc=d3e50824-112756

+ Details

Name:	us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsWithinFiveYears
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of minimum lease payments maturing in the next fiscal year following the latest fiscal year for sale-leaseback transactions accounted for using the deposit method or as a financing.

+ References

+ Details

Name:	us-gaap_MinimumLeasePaymentsSaleLeasebackTransactionsWithinOneYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant