Business Segment Information (Schedule Of Segment Information) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jul. 22, 2013
Segment Reporting Information [Line Items]
Segment margin	$ 82,681,000	$ 70,442,000	$ 160,032,000	$ 142,507,000
Capital Expenditures	140,124,000	77,316,000	242,902,000	179,131,000
Pipeline Transportation Services Revenues	23,192,000	22,537,000	44,112,000	43,316,000
Refinery Services Revenues	52,801,000	51,476,000	106,994,000	100,960,000
Supply And Logistics Revenues	939,056,000	994,681,000	1,883,662,000	1,939,226,000
External customers	1,015,049,000	1,068,694,000	2,034,768,000	2,083,502,000
Intersegment	0	0	0	0
Total revenues	1,015,049,000	1,068,694,000	2,034,768,000	2,083,502,000
Business Acquisition, Transaction Costs					230,900,000
Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Segment margin	27,966,000	26,456,000	56,058,000	51,652,000
Capital Expenditures	7,037,000	37,556,000	41,317,000	121,408,000
External customers	19,758,000	19,180,000	36,208,000	36,485,000
Intersegment	3,434,000	3,357,000	7,904,000	6,831,000
Refinery Services [Member]
Segment Reporting Information [Line Items]
Segment margin	21,627,000	18,696,000	42,499,000	36,661,000
Capital Expenditures	597,000	1,312,000	899,000	1,664,000
External customers	55,552,000	54,288,000	112,659,000	106,467,000
Intersegment	(2,751,000)	(2,812,000)	(5,665,000)	(5,507,000)
Supply And Logistics [Member]
Segment Reporting Information [Line Items]
Segment margin	33,088,000	25,290,000	61,475,000	54,194,000
Capital Expenditures	132,490,000	38,448,000	200,686,000	56,059,000
External customers	939,739,000	995,226,000	1,885,901,000	1,940,550,000
Intersegment	(683,000)	(545,000)	(2,239,000)	(1,324,000)
Sekco [Member] | Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	$ 2,300,000	$ 1,700,000	$ 12,700,000	$ 66,200,000