Business Segment Information (Schedule Of Segment Information) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Jul. 22, 2013
Segment Reporting Information [Line Items]
Segment margin	$ 77,351,000	$ 72,065,000
Capital Expenditures	102,778,000	101,815,000
Pipeline Transportation Services Revenues	20,920,000	20,779,000
Refinery Services Revenues	54,193,000	49,484,000
Supply And Logistics Revenues	944,606,000	944,545,000
External customers	1,019,719,000	1,014,808,000
Intersegment	0	0
Total revenues	1,019,719,000	1,014,808,000
Business Acquisition, Transaction Costs			230,900,000
Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Segment margin	28,092,000	25,196,000
Capital Expenditures	34,280,000	83,852,000
External customers	16,450,000	17,305,000
Intersegment	4,470,000	3,474,000
Refinery Services [Member]
Segment Reporting Information [Line Items]
Segment margin	20,872,000	17,965,000
Capital Expenditures	302,000	352,000
External customers	57,107,000	52,179,000
Intersegment	(2,914,000)	(2,695,000)
Supply And Logistics [Member]
Segment Reporting Information [Line Items]
Segment margin	28,387,000	28,904,000
Capital Expenditures	68,196,000	17,611,000
External customers	946,162,000	945,324,000
Intersegment	(1,556,000)	(779,000)
Sekco [Member] | Pipeline Transportation [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	$ 10,400,000	$ 64,500,000