Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Retail motor fuel	$ 1,401,830	$ 1,580,815	$ 3,876,542	$ 4,597,670
Wholesale motor fuel sales to third parties	2,026,454	2,664,186	5,544,905	7,946,323
Wholesale motor fuel sales to affiliates	28,226	3,779	45,065	8,718
Merchandise	605,275	589,299	1,705,963	1,633,102
Rental income	22,883	20,949	67,582	61,265
Other	52,649	47,744	151,740	136,630
Intersegment	0	0	0	0
Total revenues	4,137,317	4,906,772	11,391,797	14,383,708
Gross Profit, Motor Fuel - Retail	179,003	196,002	447,883	483,207
Gross Profit, Motor Fuel - Wholesale	138,169	76,174	453,887	331,711
Gross Profit, Merchandise	192,292	185,120	545,962	510,132
Gross Profit, Other	67,923	67,462	208,965	194,151
Gross profit	577,387	524,758	1,656,697	1,519,201
Total operating expenses	473,237	431,406	1,336,545	1,236,845
Income from operations	104,150	93,352	320,152	282,356
Interest expense, net	54,289	28,517	132,565	57,692
Income before income taxes	49,861	64,835	187,587	224,664
Net income tax expense	5,310	30,124	8,890	47,113
Net income and comprehensive income	44,551	34,711	178,697	177,551
Depreciation, amortization and accretion	77,628	65,984	234,418	202,927
EBITDA	181,778	159,336	554,570	485,283
Non-cash compensation expense	3,017	2,132	9,455	5,886
Loss (gain) on disposal of assets	203	747	2,918	894
Unrealized loss on commodity derivatives	5,689	735	8,534	2,926
Inventory fair value adjustments	(1,767)	90,763	(63,797)	34,146
Adjusted EBITDA	188,920	253,713	511,680	529,135
Capital expenditures	110,668	140,768	290,560	342,429
Total assets at end of period	8,997,001	8,841,819	8,997,001	8,841,819	$ 8,841,819
Retail Segment [Member]
Segment Reporting Information [Line Items]
Income before income taxes			(21,004)
Operating Segments [Member] | Wholesale Segment [Member]
Segment Reporting Information [Line Items]
Retail motor fuel	0	0	0	0
Wholesale motor fuel sales to third parties	2,026,454	2,664,186	5,544,905	7,946,323
Wholesale motor fuel sales to affiliates	28,226	3,779	45,065	8,718
Merchandise	0	0	0	0
Rental income	19,353	11,333	57,210	34,327
Other	13,331	5,996	30,164	17,876
Intersegment	1,006,088	1,183,629	2,698,542	3,519,958
Total revenues	3,093,452	3,868,923	8,375,886	11,527,202
Gross Profit, Motor Fuel - Retail	0	0	0	0
Gross Profit, Motor Fuel - Wholesale	138,169	76,174	453,887	331,711
Gross Profit, Merchandise	0	0	0	0
Gross Profit, Other	26,629	16,099	78,974	48,588
Gross profit	164,798	92,273	532,861	380,299
Total operating expenses	103,775	89,527	282,966	253,549
Income from operations	61,023	2,746	249,895	126,750
Interest expense, net	13,198	13,106	41,304	33,293
Income before income taxes	47,825	(10,360)	208,591	93,457
Net income tax expense	507	39	1,361	898
Net income and comprehensive income	47,318	(10,399)	207,230	92,559
Depreciation, amortization and accretion	21,819	13,571	60,427	47,821
EBITDA	82,842	16,317	310,322	174,571
Non-cash compensation expense	1,516	1,697	4,600	3,361
Loss (gain) on disposal of assets	(599)	921	(1,396)	1,069
Unrealized loss on commodity derivatives	5,689	735	8,534	2,926
Inventory fair value adjustments	(1,581)	87,307	(60,920)	32,200
Adjusted EBITDA	87,867	106,977	261,140	214,127
Capital expenditures	34,382	17,610	78,369	98,283
Total assets at end of period	2,938,747	2,925,842	2,938,747	2,925,842
Operating Segments [Member] | Retail Segment [Member]
Segment Reporting Information [Line Items]
Retail motor fuel	1,401,830	1,580,815	3,876,542	4,597,670
Wholesale motor fuel sales to third parties	0	0	0	0
Wholesale motor fuel sales to affiliates	0	0	0	0
Merchandise	605,275	589,299	1,705,963	1,633,102
Rental income	3,530	9,616	10,372	26,938
Other	39,318	41,748	121,576	118,754
Intersegment	37,978	34,202	99,253	93,907
Total revenues	2,087,931	2,255,680	5,813,706	6,470,371
Gross Profit, Motor Fuel - Retail	179,003	196,002	447,883	483,207
Gross Profit, Motor Fuel - Wholesale	0	0	0	0
Gross Profit, Merchandise	192,292	185,120	545,962	510,132
Gross Profit, Other	41,294	51,363	129,991	145,563
Gross profit	412,589	432,485	1,123,836	1,138,902
Total operating expenses	369,462	341,879	1,053,579	983,296
Income from operations	43,127	90,606	70,257	155,606
Interest expense, net	41,091	15,411	91,261	24,399
Income before income taxes	2,036	75,195		131,207
Net income tax expense	4,803	30,085	7,529	46,215
Net income and comprehensive income	(2,767)	45,110	(28,533)	84,992
Depreciation, amortization and accretion	55,809	52,413	173,991	155,106
EBITDA	98,936	143,019	244,248	310,712
Non-cash compensation expense	1,501	435	4,855	2,525
Loss (gain) on disposal of assets	802	(174)	4,314	(175)
Unrealized loss on commodity derivatives	0	0	0	0
Inventory fair value adjustments	(186)	3,456	(2,877)	1,946
Adjusted EBITDA	101,053	146,736	250,540	315,008
Capital expenditures	76,286	123,158	212,191	244,146
Total assets at end of period	6,058,254	5,915,977	6,058,254	5,915,977
Intersegment Eliminations
Segment Reporting Information [Line Items]
Intersegment	(1,044,066)	(1,217,831)	(2,797,795)	(3,613,865)
Total revenues	$ (1,044,066)	$ (1,217,831)	$ (2,797,795)	$ (3,613,865)