Product Sales Revenues (Components Of Product Sales Revenues) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Product Sales Revenue [Line Items]
Physical sale of petroleum products	$ 163,418		$ 157,793		$ 471,124		$ 433,422
Total NYMEX contract adjustments	37,150		2,150		5,174		(36,183)
Total product sales revenues	200,568		159,943		476,298		397,239
Petroleum Products Blending And Fractionation Activities [Member]
Product Sales Revenue [Line Items]
Total NYMEX contract adjustments	27,850	[1]	(1,078)	[1]	2,961	[1]	(21,058)	[1]
Houston-To-El Paso Pipeline Section Line Fill And Working Inventory [Member]
Product Sales Revenue [Line Items]
Total NYMEX contract adjustments	9,020	[1]	3,228	[1]	1,921	[1]	(15,199)	[1]
Other [Member]
Product Sales Revenue [Line Items]
Total NYMEX contract adjustments	$ 280				$ 292		$ 74

[1] The associated petroleum products for these activities are, to the extent still owned as of the statement date, or were, to the extent no longer owned as of the statement date, classified as inventory in current assets on our consolidated balance sheets.