Intangible Assets Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 135,507	$ 122,767
Finite-Lived Intangible Assets, Accumulated Amortization	(50,829)	(40,452)
Intangible assets, net	84,678	82,315
Wholesale Fuel Supply Contracts
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	118,201	105,181
Finite-Lived Intangible Assets, Accumulated Amortization	(41,212)	(32,498)
Intangible assets, net	76,989	72,683
Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,094	2,494
Finite-Lived Intangible Assets, Accumulated Amortization	(645)	(1,264)
Intangible assets, net	449	1,230
Covenant Not To Compete
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	4,131	3,911
Finite-Lived Intangible Assets, Accumulated Amortization	(2,274)	(1,600)
Intangible assets, net	1,857	2,311
Below Market Lease
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	12,081	11,181
Finite-Lived Intangible Assets, Accumulated Amortization	(6,698)	(5,090)
Intangible assets, net	$ 5,383	$ 6,091