Organization and Basis of Presentation, Acquisition (Details)	6 Months Ended
	Jun. 30, 2014
Marine terminals
Acquisition
Number of assets (assets)	4
Petroleum coke handling and storage facility
Acquisition
Number of assets (assets)	1
Los Angeles Logistics Assets
Acquisition
Effective date of acquisition	Dec. 06, 2013
Los Angeles Logistics Assets | Marine terminals
Acquisition
Number of assets (assets)	2
Los Angeles Logistics Assets | Marine storage terminals
Acquisition
Number of assets (assets)	1
Los Angeles Logistics Assets | Products terminals
Acquisition
Number of assets (assets)	1
Los Angeles Logistics Assets | Petroleum coke handling and storage facility
Acquisition
Number of assets (assets)	1
Los Angeles Terminal Assets
Acquisition
Number of assets (assets)	6
Effective date of acquisition	Jun. 01, 2013