Segment Information (Details)	6 Months Ended
	Jun. 30, 2017 operating_segments mi bbl
Segment Reporting Information [Line Items]
Number of Reportable Segments | operating_segments	2
Pipeline, Miles | mi	705
Active Storage Capacity	12,400,000
Pump Station [Member] | Logistics Segment [Member]
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Operated, Number of Significant Assets	15
Crude Oil Storage Tanks [Member] | Logistics Segment [Member]
Segment Reporting Information [Line Items]
Active Storage Capacity	959,000
Property, Plant and Equipment, Operated, Number of Significant Assets	33
Truck Loading and Unloading Locations [Member] | Logistics Segment [Member]
Segment Reporting Information [Line Items]
Property, Plant and Equipment, Operated, Number of Significant Assets	8
Storage Tanks [Member] | Logistics Segment [Member]
Segment Reporting Information [Line Items]
Active Storage Capacity	11,400,000