Product Sales Revenues (Components Of Product Sales Revenues) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Product Sales Revenue [Line Items]
Physical sale of petroleum products	$ 293,240		$ 207,880
NYMEX Adjustments Included in Product Sales	2,823		(6,169)
Total product sales revenue	296,063		201,711
Butane Blending and Fractionation Activities [Member]
Product Sales Revenue [Line Items]
NYMEX Adjustments Included in Product Sales	2,823	[1]	(6,158)	[1]
Other Commodity Activities [Member]
Product Sales Revenue [Line Items]
NYMEX Adjustments Included in Product Sales	$ 0		$ (11)

[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.