Segment Disclosures, Narrative Information (Details)	3 Months Ended
	Mar. 31, 2014 segments
Segment Reporting Information
Number of operating segments (segments)	2
Segment reporting, foreign operations	We do not have any foreign operations.
Crude oil gathering system
Segment Reporting Information
Number of assets (assets)	1
Regulated Common Carrier Pipelines
Segment Reporting Information
Number of assets (assets)	1
Jet Fuel Pipelines
Segment Reporting Information
Number of assets (assets)	1
Crude oil and refined products terminals and storage facilities
Segment Reporting Information
Number of assets (assets)	20
Marine terminals
Segment Reporting Information
Number of assets (assets)	4
Rail car unloading facility
Segment Reporting Information
Number of assets (assets)	1
Petroleum coke handling and storage facility
Segment Reporting Information
Number of assets (assets)	1