Property, Plant and Equipment (PP&E Schedule) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 202,606	$ 179,353
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(66,289)	(66,628)
Property, Plant and Equipment, Net, Excluding Construction in Progress	136,317	112,725
Construction in Progress, Gross	9,301	21,871
Property, Plant and Equipment, Net	145,618	134,596
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	5,428	6,023
Pipelines [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	71,103	60,731
Terminals and Related Assets [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	103,361	90,425
Asphalt Plant, Terminals, and Related Assets [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 22,714	$ 22,174