Name:	glp_DistributionMadeToMemberOrLimitedPartnerQuarterlyCashDistributionsTargetAmountPerUnit
Namespace Prefix:	glp_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

The percentage rate used to calculate dividend payments on preferred units in a partnership.

No definition available.

Name:	glp_PreferredUnitsDividendRatePercentage
Namespace Prefix:	glp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

The per unit liquidation preference (or restrictions) of nonredeemable preferred units (or preferred units redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the units. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the unit.

No definition available.

Name:	glp_PreferredUnitsLiquidationPreference
Namespace Prefix:	glp_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP).

Name:	us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

Per unit of ownership amount of cash distributions paid to unit-holder of a limited partnership (LP).

Name:	us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

The total amount of distributions to the general partner during the period.

Name:	us-gaap_GeneralPartnersCapitalAccountDistributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of incentive obligation paid in cash or stock during the period to a limited liability corporation managing member or limited partnership general partner.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 272
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483014/272-10-45-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-8

Name:	us-gaap_IncentiveDistributionDistributionPerYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The total amount of distributions to limited partners.

Name:	us-gaap_LimitedPartnersCapitalAccountDistributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Total distributions to each class of partners (i.e., general, limited and preferred partners).

Name:	us-gaap_PartnersCapitalAccountDistributions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

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

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

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

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