Properties and Equipment (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	$ 1,224,306,000		$ 1,210,913,000
Less accumulated depreciation	265,557,000		253,099,000
Properties and equipment, net	958,749,000		957,814,000
Interest costs, capitalized during period	(376,000)	(69,000)
Depreciation	(13,700,000)	(12,300,000)
Pipelines and terminals [Member]
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	1,077,058,000		1,077,037,000
Land and right of way [Member]
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	63,425,000		63,425,000
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	63,828,000		50,454,000
Other Fixed Assets [Member]
Property, Plant and Equipment [Line Items]
Properties and equipment, gross	$ 19,995,000		$ 19,997,000