Business Segment Information (Schedule Of Segment Information) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jul. 22, 2013
Segment Reporting Information [Line Items]
Segment margin	$ 94,790,000	$ 64,824,000	$ 254,822,000	$ 207,331,000
Capital Expenditures	139,877,000	330,088,000	382,779,000	509,219,000
Pipeline Transportation Services Revenues	21,323,000	23,217,000	65,435,000	66,533,000
Refinery Services Revenues	51,208,000	52,410,000	158,202,000	153,370,000
Supply And Logistics Revenues	891,583,000	1,014,666,000	2,775,245,000	2,953,892,000
External customers	964,114,000	1,090,293,000	2,998,882,000	3,173,795,000
Intersegment	0	0	0	0
Total revenues	964,114,000	1,090,293,000	2,998,882,000	3,173,795,000
Business Acquisition, Transaction Costs					230,900,000
Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Segment margin	37,020,000	29,860,000	93,078,000	81,512,000
Capital Expenditures	35,289,000	38,514,000	76,606,000	159,922,000
External customers	16,689,000	16,636,000	52,897,000	53,121,000
Intersegment	4,634,000	6,581,000	12,538,000	13,412,000
Refinery Services [Member]
Segment Reporting Information [Line Items]
Segment margin	21,855,000	19,163,000	64,354,000	55,824,000
Capital Expenditures	1,254,000	632,000	2,153,000	2,296,000
External customers	53,930,000	55,025,000	166,589,000	161,492,000
Intersegment	(2,722,000)	(2,615,000)	(8,387,000)	(8,122,000)
Supply And Logistics [Member]
Segment Reporting Information [Line Items]
Segment margin	35,915,000	15,801,000	97,390,000	69,995,000
Capital Expenditures	103,334,000	290,942,000	304,020,000	347,001,000
External customers	893,495,000	1,018,632,000	2,779,396,000	2,959,182,000
Intersegment	(1,912,000)	(3,966,000)	(4,151,000)	(5,290,000)
Sekco [Member] | Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	$ 23,400,000	$ 5,200,000	$ 36,100,000	$ 71,400,000