Organization and Basis of Presentation (Details)		12 Months Ended
	Aug. 07, 2018 $ / shares shares	Dec. 31, 2018 item $ / shares shares	Dec. 31, 2017 shares
Organization
Number of owned, leased and/or supplied gasoline stations | item		1,579
Number of convenience stores | item		297
General partner interest (as a percent)		0.67%
Number of units held		33,995,563
Liquidation preference (in dollars per unit) | $ / shares	$ 25.00
Series A Preferred Limited Partners
Organization
Number of units held		0	0
Number of units sold	2,760,000
Initial distribution rate (as a percentage)	9.75%	9.75%
Liquidation preference (in dollars per unit) | $ / shares		$ 25.00
Sale price (in dollars per unit) | $ / shares	$ 25.00
Global Partners LP [Member]
Organization
Limited partner ownership interest (as a percent)		99.33%
Affiliates of general partner
Organization
Number of units held		7,340,941
Affiliates of general partner | Global Partners LP [Member]
Organization
Limited partner ownership interest (as a percent)		21.60%