Acquisitions And Divestitures (Components And Useful Lives Of Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2011 years
Property, plant and equipment	$ 1,419,591
Land and improvements [Member]
Property, plant and equipment	30,759
Buildings and improvements [Member]
Property, plant and equipment	3,123
Property, plant and equipment useful life, maximum in years	40
Property, Plant and Equipment, Useful Life, Minimum	10
Pipelines and equipment [Member]
Property, plant and equipment	662,881
Property, plant and equipment useful life, maximum in years	65
Property, Plant and Equipment, Useful Life, Minimum	20
Natural gas liquids storage [Member]
Property, plant and equipment	682,419
Property, plant and equipment useful life, maximum in years	40
Linepack [Member]
Property, plant and equipment	704
Vehicles [Member]
Property, plant and equipment	242
Property, plant and equipment useful life, maximum in years	20
Property, Plant and Equipment, Useful Life, Minimum	3
Furniture and fixtures [Member]
Property, plant and equipment	49
Property, plant and equipment useful life, maximum in years	10
Property, Plant and Equipment, Useful Life, Minimum	3
Other [Member]
Property, plant and equipment	8,526
Property, plant and equipment useful life, maximum in years	10
Property, Plant and Equipment, Useful Life, Minimum	5
Construction work-in-process [Member]
Property, plant and equipment	$ 30,888