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Acquisitions (Schedule Of Selected Financial Information) (Details) (Gulf Of Mexico Crude Oil Pipeline Systems [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Gulf Of Mexico Crude Oil Pipeline Systems [Member]
   
Business Acquisition [Line Items]    
Revenues $ 1,180 $ 4,334
Equity in earnings of equity investees 3,497 9,194
Net income $ 3,950 $ 11,128