Business Segment Information (Schedule Of Total Assets By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Total Conolidated Assets	$ 2,862,202	$ 2,109,664	$ 1,730,844
Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Total Conolidated Assets	1,075,235	890,652	594,728
Refinery Services [Member]
Segment Reporting Information [Line Items]
Total Conolidated Assets	417,121	414,170	426,993
Supply And Logistics [Member]
Segment Reporting Information [Line Items]
Total Conolidated Assets	1,312,461	750,347	658,393
Other Assets [Member]
Segment Reporting Information [Line Items]
Total Conolidated Assets	$ 57,385	$ 54,495	$ 50,730