Fixed Assets (Schedule Of Fixed Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Fixed Assets, at cost	$ 4,476,649	$ 4,310,226
Less: Accumulated depreciation	(416,425)	(378,247)
Net fixed assets	4,060,224	3,931,979
Pipelines And Related Assets [Member]
Fixed Assets, at cost	2,656,905	2,501,821
Machinery And Equipment [Member]
Fixed Assets, at cost	414,707	414,100
Transportation Equipment [Member]
Fixed Assets, at cost	18,323	19,025
Marine Vessels [Member]
Fixed Assets, at cost	803,581	794,508
Land, Buildings And Improvements [Member]
Fixed Assets, at cost	46,462	41,202
Office Equipment, Furniture And Fixtures [Member]
Fixed Assets, at cost	7,869	7,540
Construction In Progress [Member]
Fixed Assets, at cost	481,887	485,575
Property, Plant And Equipment, Other Types [Member]
Fixed Assets, at cost	$ 46,915	$ 46,455