Segment Reporting - Schedule of Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting Information [Line Items]
Fuel costs	$ 1,054,762	$ 776,847	$ 1,821,904	$ 1,497,058
Operating income from segments	65,055	60,916	125,782	113,444
Interest and other financial expenses, net	(3,679)	(7,797)	(9,200)	(15,275)
Operating Segments
Segment Reporting Information [Line Items]
Total revenues	1,838,588	1,443,384	3,182,953	2,790,710
Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	1,043,603	656,235	1,769,996	1,252,965
Wholesale
Segment Reporting Information [Line Items]
Fuel costs	891,375	670,714	1,542,339	1,280,727
Credit card fees	1,826	1,823	3,348	3,492
Rent, included allocated expenses	13,580	9,451	26,532	18,107
Repairs and maintenance	1,944	1,277	3,211	2,268
Other segment expenses	1,477	2,097	2,669	2,550
Operating income from segments	24,883	23,242	47,895	41,872
Wholesale | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	935,085	708,604	1,625,994	1,349,016
Wholesale | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Fleet Fueling
Segment Reporting Information [Line Items]
Fuel costs	158,258	100,353	268,812	203,457
Credit card fees	1,325	1,136	2,735	2,181
Rent, included allocated expenses	2,952	2,845	5,924	5,699
Repairs and maintenance	916	1,255	1,906	2,173
Other segment expenses	1,510	1,698	3,169	3,309
Operating income from segments	13,287	13,079	25,242	24,071
Fleet Fueling | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	178,248	120,366	307,788	240,890
Fleet Fueling | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
GPMP
Segment Reporting Information [Line Items]
Fuel costs	0	352	0	848
Other segment expenses	2,358	2,660	4,680	5,328
Operating income from segments	26,570	23,948	52,186	45,874
Interest and other financial expenses, net	(3,679)	(7,797)	(9,200)	(15,275)
GPMP | Related Party
Segment Reporting Information [Line Items]
Fuel costs	704,550	592,799	1,208,069	1,156,632
GPMP | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	716,839	605,278	1,232,208	1,180,997
GPMP | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	1,039,889	653,396	1,763,140	1,247,544
Fuel costs	1,023,250	638,915	1,730,413	1,219,859
Other Segments
Segment Reporting Information [Line Items]
Other segment expenses	11,815	11,328	23,360	23,601
Operating income from segments	315	647	459	1,627
Other Segments | Operating Segments
Segment Reporting Information [Line Items]
Total revenues	8,416	9,136	16,963	19,807
Other Segments | Intersegment Eliminations
Segment Reporting Information [Line Items]
Total revenues	3,714	2,839	6,856	5,421
Fuel Revenue [Member]
Segment Reporting Information [Line Items]
Total revenues	1,098,919	820,871	1,906,517	1,577,669
Fuel Revenue [Member] | Related Party
Segment Reporting Information [Line Items]
Total revenues	716,008	604,065	1,230,492	1,178,481
Fuel Revenue [Member] | Wholesale
Segment Reporting Information [Line Items]
Total revenues	917,696	696,103	1,591,551	1,326,163
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	175,343	118,121	302,642	236,527
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	353	0	849
Fuel Revenue [Member] | GPMP | Related Party
Segment Reporting Information [Line Items]
Total revenues	716,008	604,065	1,230,492	1,178,481
Fuel Revenue [Member] | Other Segments
Segment Reporting Information [Line Items]
Total revenues	5,880	6,294	12,324	14,130
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	20,291	15,229	39,393	28,186
Other Revenues, Net | Related Party
Segment Reporting Information [Line Items]
Total revenues	3,370	3,219	6,551	6,374
Other Revenues, Net | Wholesale
Segment Reporting Information [Line Items]
Total revenues	16,984	12,501	33,514	22,853
Other Revenues, Net | Wholesale | Related Party
Segment Reporting Information [Line Items]
Total revenues	405	0	929	0
Other Revenues, Net | Fleet Fueling
Segment Reporting Information [Line Items]
Total revenues	2,905	2,245	5,146	4,363
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	47	191	218	346
Other Revenues, Net | GPMP | Related Party
Segment Reporting Information [Line Items]
Total revenues	784	669	1,498	1,321
Other Revenues, Net | Other Segments
Segment Reporting Information [Line Items]
Total revenues	355	292	515	624
Other Revenues, Net | Other Segments | Related Party
Segment Reporting Information [Line Items]
Total revenues	$ 2,181	$ 2,550	$ 4,124	$ 5,053