Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 593,157		$ 588,113
Accumulated depreciation	(191,966)		(182,743)
Property, plant and equipment, net, excluding construction in progress	401,191		405,370
Property, plant and equipment, net	410,154		412,170
Depreciation	9,400	$ 9,000
Interest Expense, Construction in Progress, Contra	0	$ 0
Land and Building [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	27,141		26,463
Pipelines and related assets
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	266,731		264,398
Terminals and related assets
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	247,311		245,512
Asphalt plant, terminals and related assets
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	26,890		26,861
Wholesale and related assets
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	25,084		24,879
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	8,963		6,800
Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Assets Held-for-sale, Not Part of Disposal Group	$ 7,000		$ 7,300