Fixed Assets (Schedule Of Fixed Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fixed Assets, at cost	$ 1,155,977	$ 723,225
Less: Accumulated depreciation	(186,640)	(157,944)
Net fixed assets	969,337	565,281
Pipelines And Related Assets [Member]
Fixed Assets, at cost	268,650	226,831
Machinery And Equipment [Member]
Fixed Assets, at cost	110,710	87,502
Transportation Equipment [Member]
Fixed Assets, at cost	19,751	21,170
Marine Vessels [Member]
Fixed Assets, at cost	529,891	298,054
Land, Buildings And Improvements [Member]
Fixed Assets, at cost	20,002	15,606
Office Equipment, Furniture And Fixtures [Member]
Fixed Assets, at cost	5,436	4,964
Construction In Progress [Member]
Fixed Assets, at cost	180,892	52,541
Property, Plant And Equipment, Other Types [Member]
Fixed Assets, at cost	$ 20,645	$ 16,557