Fixed Assets (Schedule Of Fixed Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fixed Assets, at cost	$ 4,814,044	$ 4,763,396
Less: Accumulated depreciation	(591,275)	(548,532)
Net fixed assets	4,222,769	4,214,864
Pipelines And Related Assets [Member]
Fixed Assets, at cost	2,848,339	2,901,202
Machinery And Equipment [Member]
Fixed Assets, at cost	467,126	427,658
Transportation Equipment [Member]
Fixed Assets, at cost	17,049	17,543
Marine Vessels [Member]
Fixed Assets, at cost	864,103	863,199
Land, Buildings And Improvements [Member]
Fixed Assets, at cost	77,986	55,712
Office Equipment, Furniture And Fixtures [Member]
Fixed Assets, at cost	9,642	9,654
Construction In Progress [Member]
Fixed Assets, at cost	481,595	440,225
Property, Plant And Equipment, Other Types [Member]
Fixed Assets, at cost	$ 48,204	$ 48,203

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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