Amount of cash distribution paid to unit-holder of limited partnership (LP).

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

- Definition

Date of distribution for distribution of cash or unit to limited partner of limited partnership (LP), in YYYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DistributionMadeToLimitedPartnerDistributionDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

The amount of the distribution per unit of limited partner interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

+ Details

Name:	us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_LimitedPartnersCapitalAccountByClassAxis=gel_CommonUnitholdersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Partners' Capital, Mezzanine Equity and Distributions (Distributions Paid) (Details) - Common Unitholders - USD ($) $ / shares in Units, $ in Thousands	Feb. 14, 2023	Nov. 14, 2022	Aug. 12, 2022	May 13, 2022	Feb. 14, 2022	Nov. 12, 2021	Aug. 13, 2021	May 14, 2021	Feb. 12, 2021	Nov. 13, 2020	Aug. 14, 2020	May 15, 2020
Distribution Made to Limited Partner [Line Items]
Date Paid		Nov. 14, 2022	Aug. 12, 2022	May 13, 2022	Feb. 14, 2022	Nov. 12, 2021	Aug. 13, 2021	May 14, 2021	Feb. 12, 2021	Nov. 13, 2020	Aug. 14, 2020	May 15, 2020
Per Unit Amount (in dollars per unit)		$ 0.1500	$ 0.1500	$ 0.1500	$ 0.1500	$ 0.1500	$ 0.1500	$ 0.1500	$ 0.1500	$ 0.1500	$ 0.1500	$ 0.1500
Total Amount		$ 18,387	$ 18,387	$ 18,387	$ 18,387	$ 18,387	$ 18,387	$ 18,387	$ 18,387	$ 18,387	$ 18,387	$ 18,387
Subsequent Event
Distribution Made to Limited Partner [Line Items]
Date Paid	Feb. 14, 2023
Total Amount	$ 24,000
Scenario, Forecast \| Subsequent Event
Distribution Made to Limited Partner [Line Items]
Date Paid	Feb. 14, 2023
Per Unit Amount (in dollars per unit)	$ 0.1500
Total Amount	$ 18,387