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Business Segment Information (Schedule Of Segment Information) (Details) - Business Acquisition, Acquiree [Domain] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Segment Reporting Information [Line Items]    
Segment margin $ 94,121 $ 77,351
Capital Expenditures 125,208 102,778
Pipeline Transportation Services Revenues 19,858 20,920
Refinery Services Revenues 46,124 54,193
Supply And Logistics Revenues 403,504 888,313
External customers 526,857 1,019,719
Intersegment 0 0
Total revenues 526,857 1,019,719
Pipeline Transportation [Member]    
Segment Reporting Information [Line Items]    
Segment margin 14,323 14,689
Capital Expenditures 68,591 23,896
External customers 15,831 15,503
Intersegment 3,237 4,470
Total revenues 19,068 19,973
Offshore Pipeline Transportation [Member]    
Segment Reporting Information [Line Items]    
Segment margin 25,198 13,403
Capital Expenditures 2,053 10,384
External customers 790 947
Intersegment 0 0
Total revenues 790 947
Refinery Services [Member]    
Segment Reporting Information [Line Items]    
Segment margin 19,160 20,872
Capital Expenditures 1,212 302
External customers 48,435 57,107
Intersegment (2,311) (2,914)
Total revenues 46,124 54,193
Marine Transportation [Member]    
Segment Reporting Information [Line Items]    
Segment margin 25,693 20,457
Capital Expenditures 16,576 10,959
External customers 54,640 51,090
Intersegment 2,731 5,203
Total revenues 57,371 56,293
Supply And Logistics [Member]    
Segment Reporting Information [Line Items]    
Segment margin 9,747 7,930
Capital Expenditures 36,776 57,237
External customers 407,161 895,072
Intersegment (3,657) (6,759)
Total revenues 403,504 888,313
Sekco [Member] | Pipeline Transportation [Member]    
Segment Reporting Information [Line Items]    
Capital Expenditures $ 1,800 $ 10,400