Fixed Assets (Schedule Of Fixed Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fixed Assets, at cost	$ 1,552,110	$ 1,327,974
Less: Accumulated depreciation	(227,838)	(199,230)
Net fixed assets	1,324,272	1,128,744
Pipelines And Related Assets [Member]
Fixed Assets, at cost	421,319	338,920
Machinery And Equipment [Member]
Fixed Assets, at cost	260,457	173,092
Transportation Equipment [Member]
Fixed Assets, at cost	18,535	19,140
Marine Vessels [Member]
Fixed Assets, at cost	585,933	554,679
Land, Buildings And Improvements [Member]
Fixed Assets, at cost	31,912	30,170
Office Equipment, Furniture And Fixtures [Member]
Fixed Assets, at cost	5,537	5,633
Construction In Progress [Member]
Fixed Assets, at cost	195,712	183,037
Property, Plant And Equipment, Other Types [Member]
Fixed Assets, at cost	$ 32,705	$ 23,303