Supp Guarantor Cond Cons Fin Stmts - I/S (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Sales	$ 2,270,784,000	$ 1,750,812,000
Cost of sales	2,130,757,000	1,620,753,000
Gross profit	140,027,000	130,059,000
Costs and operating expenses:
Selling, general and administrative expenses	36,787,000	34,984,000
Operating expenses	67,213,000	72,236,000
Amortization expense	2,261,000	2,509,000
Net (gain) loss on sale and disposition of assets	(11,862,000)	6,105,000
Total costs and operating expenses	94,399,000	115,834,000
Operating income	45,628,000	14,225,000
Interest expense	(23,287,000)	(22,980,000)
Income (loss) before income tax benefit	22,341,000	(8,755,000)
Income tax benefit	164,000	920,000
Net income (loss)	22,505,000	(7,835,000)
Net income attributable to noncontrolling interest	441,000	811,000
Net income (loss) attributable to Global Partners LP	22,946,000	(7,024,000)
Less: General partner’s interest in net income (loss), including incentive distribution rights	154,000	(47,000)
Limited partners' interest in net income (loss)	22,792,000	(6,977,000)
Eliminations
Sales	(6,000)	(2,102,000)
Cost of sales	(6,000)	(2,102,000)
(Issuer) Guarantor Subsidiaries
Sales	2,270,121,000	1,750,281,000
Cost of sales	2,129,652,000	1,620,015,000
Gross profit	140,469,000	130,266,000
Costs and operating expenses:
Selling, general and administrative expenses	36,673,000	34,751,000
Operating expenses	66,649,000	70,649,000
Amortization expense	2,261,000	2,509,000
Net (gain) loss on sale and disposition of assets	(11,845,000)	6,105,000
Total costs and operating expenses	93,738,000	114,014,000
Operating income	46,731,000	16,252,000
Interest expense	(23,287,000)	(22,980,000)
Income (loss) before income tax benefit	23,444,000	(6,728,000)
Income tax benefit	164,000	920,000
Net income (loss)	23,608,000	(5,808,000)
Net income (loss) attributable to Global Partners LP	23,608,000	(5,808,000)
Less: General partner’s interest in net income (loss), including incentive distribution rights	154,000	(47,000)
Limited partners' interest in net income (loss)	23,454,000	(5,761,000)
Non-Guarantor Subsidiary
Sales	669,000	2,633,000
Cost of sales	1,111,000	2,840,000
Gross profit	(442,000)	(207,000)
Costs and operating expenses:
Selling, general and administrative expenses	114,000	233,000
Operating expenses	564,000	1,587,000
Net (gain) loss on sale and disposition of assets	(17,000)
Total costs and operating expenses	661,000	1,820,000
Operating income	(1,103,000)	(2,027,000)
Income (loss) before income tax benefit	(1,103,000)	(2,027,000)
Net income (loss)	(1,103,000)	(2,027,000)
Net income attributable to noncontrolling interest	441,000	811,000
Net income (loss) attributable to Global Partners LP	(662,000)	(1,216,000)
Limited partners' interest in net income (loss)	(662,000)	$ (1,216,000)
Parent Company [Member]
Costs and operating expenses:
Income tax benefit	$ 0