Supplemental Guarantor Condensed Consolidating Financial Statements (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 6,345	$ 5,238	$ 13,064	$ 9,217
Accounts receivable, net	410,881	457,730
Accounts receivable-affiliates	3,845	3,903
Inventories	371,627	336,813
Brokerage margin deposits	33,737	17,198
Derivate assets	57,470	83,826
Prepaid expenses and other current assets	74,123	56,515
Total current assets	958,028	961,223
Property and equipment, net	1,174,083	825,051
Intangible assets, net	80,049	48,902
Goodwill	301,987	154,078
Other assets	54,637	50,723
Total assets	2,568,784	2,039,977
Current liabilities:
Accounts payable	307,520	456,619
Working capital revolving credit facility-current portion	125,400	0
Line of credit		700
Environmental liabilities-current portion	3,085	3,101
Trustee taxes payable	90,183	105,744
Accrued expenses and other current liabilities	60,918	82,820
Derivative liabilities	48,272	58,507
Total current liabilities	635,378	707,491
Working capital revolving credit facility-less current portion	150,000	100,000
Revolving credit facility	517,400	133,800
Senior notes	368,316	368,136
Environmental liabilities-less current portion	72,186	34,462
Deferred tax liability	120,708	14,078
Other long-term liabilities	61,811	45,854
Total liabilities	1,925,799	1,403,821
Partners' equity
Total Global Partners LP equity	593,777	586,942
Noncontrolling interest	49,208	49,214
Total partners' equity	642,985	636,156
Total liabilities and partners' equity	2,568,784	2,039,977
Eliminations
Current assets:
Cash and cash equivalents		1,082
Accounts receivable, net		820
Accounts receivable-affiliates	(1,259)	(139)
Total current assets	(1,259)	1,763
Total assets	(1,259)	1,763
Current liabilities:
Accounts payable		681
Accounts payable - affiliates	(1,259)
Total current liabilities	(1,259)	681
Total liabilities	(1,259)	681
Partners' equity
Total Global Partners LP equity		1,082
Total partners' equity		1,082
Total liabilities and partners' equity	(1,259)	1,763
(Issuer) Guarantor Subsidiaries
Current assets:
Cash and cash equivalents	2,469	1,478	8,208	8,371
Accounts receivable, net	409,579	455,603
Accounts receivable-affiliates	4,059	3,222
Inventories	371,627	336,813
Brokerage margin deposits	33,737	17,198
Derivate assets	57,470	83,826
Prepaid expenses and other current assets	73,504	55,881
Total current assets	952,445	954,021
Property and equipment, net	1,128,262	778,385
Intangible assets, net	79,772	45,870
Goodwill	215,924	68,015
Other assets	54,637	50,723
Total assets	2,431,040	1,897,014
Current liabilities:
Accounts payable	306,937	454,267
Accounts payable - affiliates	1,045
Working capital revolving credit facility-current portion	125,400
Environmental liabilities-current portion	3,085	3,101
Trustee taxes payable	90,183	105,744
Accrued expenses and other current liabilities	60,394	81,686
Derivative liabilities	48,272	58,507
Total current liabilities	635,316	703,305
Working capital revolving credit facility-less current portion	150,000	100,000
Revolving credit facility	517,400	133,800
Senior notes	368,316	368,136
Environmental liabilities-less current portion	72,186	34,462
Deferred tax liability	120,708	14,078
Other long-term liabilities	61,811	45,854
Total liabilities	1,925,737	1,399,635
Partners' equity
Total Global Partners LP equity	505,303	497,379
Total partners' equity	505,303	497,379
Total liabilities and partners' equity	2,431,040	1,897,014
Non-Guarantor Subsidiary
Current assets:
Cash and cash equivalents	3,876	2,678	4,856	846
Accounts receivable, net	1,302	1,307
Accounts receivable-affiliates	1,045	820
Prepaid expenses and other current assets	619	634
Total current assets	6,842	5,439
Property and equipment, net	45,821	46,666
Intangible assets, net	277	3,032
Goodwill	86,063	86,063
Total assets	139,003	141,200
Current liabilities:
Accounts payable	583	1,671
Accounts payable - affiliates	214
Line of credit		700
Accrued expenses and other current liabilities	524	1,134
Total current liabilities	1,321	3,505
Total liabilities	1,321	3,505
Partners' equity
Total Global Partners LP equity	88,474	88,481
Noncontrolling interest	49,208	49,214
Total partners' equity	137,682	137,695
Total liabilities and partners' equity	$ 139,003	$ 141,200