Product Sales Revenues (Components Of Product Sales Revenues) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Product Sales Revenue [Line Items]
Physical sale of petroleum products	$ 307,706		$ 275,629
Total NYMEX contract adjustments	(31,976)		(38,333)
Total product sales revenues	275,730		237,296
Petroleum Products Blending And Fractionation Activities [Member]
Product Sales Revenue [Line Items]
Total NYMEX contract adjustments	(24,889)	[1]	(19,980)	[1]
Houston-To-El Paso Pipeline Section Linefill And Working Inventory [Member]
Product Sales Revenue [Line Items]
Total NYMEX contract adjustments	(7,099)	[1]	(18,427)	[1]
Other [Member]
Product Sales Revenue [Line Items]
Total NYMEX contract adjustments	$ 12		$ 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.