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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 342,407 $ 325,647
Less: accumulated depreciation (91,378) (71,799)
Property, plant and equipment, net 251,029 253,848
Depreciation expense 19,750 18,629
Pipelines and Transportation    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 279,155 266,169
Less: accumulated depreciation (67,032) (50,542)
Property, plant and equipment, net 212,123 215,627
Depreciation expense 16,133 15,011
Wholesale Marketing and Terminalling    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 63,252 59,478
Less: accumulated depreciation (24,346) (21,257)
Property, plant and equipment, net 38,906 38,221
Depreciation expense 3,617 3,618
Land and land improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 4,435 4,253
Building and building improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 2,236 1,886
Pipelines, tanks and terminals    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 305,302 299,101
Asset retirement obligation assets    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 2,073 2,073
Other equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 12,925 4,270
Construction in process    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 15,436 $ 14,064