Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Concentration Risk [Line Items]

Schedule of inventories (in thousands)

	2019		2018
Distillates: home heating oil, diesel and kerosene	$	222,202	$	173,403
Gasoline		120,958		93,534
Gasoline blendstocks		39,702		52,195
Crude oil		16,018		21,325
Residual oil		26,521		21,054
Propane and other		1,356		1,447
Renewable identification numbers (RINs)		1,329		1,034
Convenience store inventory		22,396		22,450
Total	$	450,482	$	386,442

Schedule of estimated useful lives of property and equipment

Gasoline station buildings, improvements and storage tanks	15-25	years
Buildings, docks, terminal facilities and improvements	5-25	years
Gasoline station equipment	7	years
Fixtures, equipment and capitalized internal use software	3-7	years

Schedule of original contracted terms

Gasoline station and convenience store leases	1-20	years
Terminal lease arrangements	1-5	years
Dedicated storage facility leases	1-5	years
Barge and railcar equipment leases	1-10	years
Office space leases	1-12	years
Computer equipment, convenience store equipment and automobile leases	1-5	years

Reconciliation of net income and the assumed allocation of net income to the limited partners' interest for purposes of computing net income per limited partner unit (in thousands, except per unit data)

	Year Ended December 31, 2019
			Common		General
			Limited		Partner
Numerator:	Total		Partners		Interest		IDRs
Net income attributable to Global Partners LP	$	35,867	$	34,488	$	1,379	$	—
Declared distribution	$	71,988	$	70,372	$	477	$	1,139
Assumed allocation of undistributed net loss		(36,121)		(35,884)		(237)		—
Assumed allocation of net income	$	35,867	$	34,488	$	240	$	1,139
Less net income attributable to Series A preferred limited partners				6,728
Net income attributable to common limited partners			$	27,760
Denominator:
Basic weighted average common units outstanding				33,810
Dilutive effect of phantom units				529
Diluted weighted average common units outstanding				34,339
Basic net income per common limited partner unit			$	0.82
Diluted net income per common limited partner unit			$	0.81

	Year Ended December 31, 2018
			Common		General
			Limited		Partner
Numerator:	Total		Partners		Interest		IDRs
Net income attributable to Global Partners LP	$	103,905	$	102,872	$	1,033	$	—
Declared distribution	$	65,794	$	65,019	$	439	$	336
Assumed allocation of undistributed net income		38,111		37,853		258		—
Assumed allocation of net income	$	103,905	$	102,872	$	697	$	336
Less net income attributable to Series A preferred limited partners				2,691
Net income attributable to common limited partners			$	100,181
Denominator:
Basic weighted average common units outstanding				33,701
Dilutive effect of phantom units				271
Diluted weighted average common units outstanding				33,972
Basic net income per common limited partner unit			$	2.97
Diluted net income per common limited partner unit			$	2.95

	Year Ended December 31, 2017
			Common		General
			Limited		Partner
Numerator:	Total		Partners		Interest		IDRs
Net income attributable to Global Partners LP	$	58,752	$	58,358	$	394	$	—
Declared distribution	$	63,316	$	62,892	$	424	$	—
Assumed allocation of undistributed net loss		(4,564)		(4,534)		(30)		—
Assumed allocation of net income	$	58,752	$	58,358	$	394	$	—
Denominator:
Basic weighted average common units outstanding				33,589
Dilutive effect of phantom units				45
Diluted weighted average common units outstanding				33,634
Basic net income per common limited partner unit			$	1.74
Diluted net income per common limited partner unit			$	1.74

Sales Revenue

Concentration Risk [Line Items]

Schedule of concentration of risk as percentage of consolidated amount

	2019		2018		2017
Gasoline sales: gasoline and gasoline blendstocks (such as ethanol)	75	%	74	%	65	%
Distillates (home heating oil, diesel and kerosene), residual oil and propane sales	21	%	22	%	26	%
Crude oil sales and crude oil logistics revenue	1	%	1	%	5	%
Convenience store sales, rental income and sundries	3	%	3	%	4	%
Total	100	%	100	%	100	%

Product Margin [Member]

Concentration Risk [Line Items]

Schedule of concentration of risk as percentage of consolidated amount

	2019		2018		2017
Wholesale segment	16	%	19	%	23	%
Gasoline Distribution and Station Operations segment	80	%	78	%	74	%
Commercial segment	4	%	3	%	3	%
Total	100	%	100	%	100	%

Common Limited Partners

Concentration Risk [Line Items]

Schedule of quarterly cash distributions

	Per Unit Cash		Distribution Declared for the
Cash Distribution Declaration Date	Distribution Declared		Quarterly Period Ended
April 29, 2019	$	0.5100	March 31, 2019
July 26, 2019	$	0.5150	June 30, 2019
October 25, 2019	$	0.5200	September 30, 2019
January 27, 2020	$	0.5250	December 31, 2019

Series A Preferred Limited Partners

Concentration Risk [Line Items]

Schedule of quarterly cash distributions

	Per Unit Cash		Distribution Declared for the
Cash Distribution Declaration Date	Distribution Declared		Quarterly Period Covering
January 22, 2019	$	0.609375	November 15, 2018 - February 14, 2019
April 19, 2019	$	0.609375	February 15, 2019 - May 14, 2019
July 22, 2019	$	0.609375	May 15, 2019 - August 14, 2019
October 22, 2019	$	0.609375	August 15, 2019 - November 14, 2019
January 21, 2020	$	0.609375	November 15, 2019 - February 14, 2020