Fixed Assets (Schedule Of Fixed Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fixed Assets, at cost	$ 1,415,443	$ 1,327,974
Less: Accumulated depreciation	(211,689)	(199,230)
Net fixed assets	1,203,754	1,128,744
Pipelines And Related Assets [Member]
Fixed Assets, at cost	419,282	338,920
Machinery And Equipment [Member]
Fixed Assets, at cost	176,256	173,092
Transportation Equipment [Member]
Fixed Assets, at cost	18,666	19,140
Marine Vessels [Member]
Fixed Assets, at cost	557,848	554,679
Land, Buildings And Improvements [Member]
Fixed Assets, at cost	31,260	30,170
Office Equipment, Furniture And Fixtures [Member]
Fixed Assets, at cost	5,372	5,633
Construction In Progress [Member]
Fixed Assets, at cost	178,764	183,037
Property, Plant And Equipment, Other Types [Member]
Fixed Assets, at cost	$ 27,995	$ 23,303