Segment Reporting - Schedule of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Segment Reporting Information [Line Items]
Fuel costs	$ 1,101,819	$ 812,897	$ 2,923,723	$ 2,309,955
Operating income from segments	66,531	61,046	192,313	174,490
Interest and other financial expenses, net	(3,789)	(7,973)	(12,989)	(23,248)
Operating Segments
Segment Reporting Information [Line Items]
Total revenues	1,888,800	1,484,189	5,071,753	4,274,899
Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	1,088,421	687,020	2,858,417	1,939,987
Wholesale
Segment Reporting Information [Line Items]
Fuel costs	930,891	700,922	2,473,230	1,981,649
Credit card fees	1,771	1,836	5,119	5,328
Rent, included allocated expenses	13,696	10,708	40,228	28,815
Repairs and maintenance	1,494	988	4,705	3,256
Other segment expenses	1,506	1,105	4,175	3,655
Operating income from segments	25,823	24,128	73,718	66,000
Wholesale | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	975,181	739,687	2,601,175	2,088,703
Wholesale | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Fleet Fueling
Segment Reporting Information [Line Items]
Fuel costs	165,940	105,952	434,752	309,409
Credit card fees	1,604	1,144	4,339	3,325
Rent, included allocated expenses	3,022	2,905	8,946	8,604
Repairs and maintenance	959	1,145	2,865	3,318
Other segment expenses	1,622	1,575	4,791	4,884
Operating income from segments	13,294	12,211	38,536	36,282
Fleet Fueling | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	186,441	124,932	494,229	365,822
Fleet Fueling | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
GPMP
Segment Reporting Information [Line Items]
Fuel costs	0	0	0	848
Other segment expenses	2,362	2,655	7,042	7,983
Operating income from segments	26,930	24,308	79,116	70,182
Interest and other financial expenses, net	(3,789)	(7,973)	(12,989)	(23,248)
GPMP | Related Party
Segment Reporting Information [Line Items]
Fuel costs	706,886	597,831	1,914,955	1,754,463
GPMP | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	719,176	609,902	1,951,384	1,790,899
GPMP | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	1,084,411	683,889	2,847,551	1,931,435
Fuel costs	1,067,409	668,997	2,797,822	1,888,858
Other Segments
Segment Reporting Information [Line Items]
Other segment expenses	11,528	12,400	34,888	36,001
Operating income from segments	484	399	943	2,026
Other Segments | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	8,002	9,668	24,965	29,475
Other Segments | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	4,010	3,131	10,866	8,552
Fuel Revenue [Member]
Segment Reporting Information [Line Items]
Total revenues	1,146,866	855,585	3,053,383	2,433,254
Fuel Revenue [Member] | Related Party
Segment Reporting Information [Line Items]
Total revenues	718,372	609,022	1,948,864	1,787,503
Fuel Revenue [Member] | Wholesale
Segment Reporting Information [Line Items]
Total revenues	957,611	725,990	2,549,162	2,052,153
Fuel Revenue [Member] | Wholesale | Related Party
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Fuel Revenue [Member] | Fleet Fueling
Segment Reporting Information [Line Items]
Total revenues	183,553	122,692	486,195	359,219
Fuel Revenue [Member] | Fleet Fueling | Related Party
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Fuel Revenue [Member] | GPMP
Segment Reporting Information [Line Items]
Total revenues	0	0	0	849
Fuel Revenue [Member] | GPMP | Related Party
Segment Reporting Information [Line Items]
Total revenues	718,372	609,022	1,948,864	1,787,503
Fuel Revenue [Member] | Other Segments
Segment Reporting Information [Line Items]
Total revenues	5,702	6,903	18,026	21,033
Fuel Revenue [Member] | Other Segments | Related Party
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Other Revenues, Net
Segment Reporting Information [Line Items]
Total revenues	20,351	16,401	59,744	44,587
Other Revenues, Net | Related Party
Segment Reporting Information [Line Items]
Total revenues	3,211	3,181	9,762	9,555
Other Revenues, Net | Wholesale
Segment Reporting Information [Line Items]
Total revenues	17,223	13,697	50,737	36,550
Other Revenues, Net | Wholesale | Related Party
Segment Reporting Information [Line Items]
Total revenues	347	0	1,276	0
Other Revenues, Net | Fleet Fueling
Segment Reporting Information [Line Items]
Total revenues	2,888	2,240	8,034	6,603
Other Revenues, Net | Fleet Fueling | Related Party
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Other Revenues, Net | GPMP
Segment Reporting Information [Line Items]
Total revenues	50	194	268	540
Other Revenues, Net | GPMP | Related Party
Segment Reporting Information [Line Items]
Total revenues	754	686	2,252	2,007
Other Revenues, Net | Other Segments
Segment Reporting Information [Line Items]
Total revenues	190	270	705	894
Other Revenues, Net | Other Segments | Related Party
Segment Reporting Information [Line Items]
Total revenues	$ 2,110	$ 2,495	$ 6,234	$ 7,548