Fixed Assets And Asset Retirement Obligations (Schedule Of Fixed Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	$ 4,763,396	$ 4,310,226
Less: Accumulated depreciation	(548,532)	(378,247)
Net fixed assets	4,214,864	3,931,979
Crude oil pipelines and natural gas pipelines and related assets
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	2,901,202	2,501,821
Machinery and equipment
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	427,658	414,100
Transportation equipment
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	17,543	19,025
Marine vessels
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	863,199	794,508
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	55,712	41,202
Office equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	9,654	7,540
Construction in progress
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	440,225	485,575
Other
Property, Plant and Equipment [Line Items]
Fixed assets, at cost	$ 48,203	$ 46,455