Fixed Assets (Schedule Of Fixed Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fixed Assets, at cost	$ 1,668,131	$ 1,327,974
Less: Accumulated depreciation	(248,145)	(199,230)
Net fixed assets	1,419,986	1,128,744
Pipelines And Related Assets [Member]
Fixed Assets, at cost	460,118	338,920
Machinery And Equipment [Member]
Fixed Assets, at cost	268,172	173,092
Transportation Equipment [Member]
Fixed Assets, at cost	18,369	19,140
Marine Vessels [Member]
Fixed Assets, at cost	594,322	554,679
Land, Buildings And Improvements [Member]
Fixed Assets, at cost	31,776	30,170
Office Equipment, Furniture And Fixtures [Member]
Fixed Assets, at cost	5,541	5,633
Construction In Progress [Member]
Fixed Assets, at cost	255,497	183,037
Property, Plant And Equipment, Other Types [Member]
Fixed Assets, at cost	$ 34,336	$ 23,303