Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 303,843		$ 303,843		$ 282,196
Accumulated depreciation	(112,739)		(112,739)		(99,651)
Property, plant and equipment, net	191,104		191,104		182,545
Depreciation	4,900	$ 4,200	14,100	$ 12,500
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	32,850		32,850		31,444
Pipelines and related assets
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	93,913		93,913		82,637
Terminals and related assets
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	118,519		118,519		113,955
Asphalt plant, terminals and related assets
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	26,326		26,326		23,007
Wholesale Assets [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 32,235		$ 32,235		$ 31,153