Significant Customers (Schedule of Significant Customers That accounted For More Than 10% Of Total Revenues) (Details)	0 Months Ended		12 Months Ended
	Dec. 31, 2010		Dec. 31, 2012		Dec. 31, 2011		Dec. 21, 2010
ConocoPhillips [Member]
Revenue percentage			12.00%	[1]
Plains Marketing LP [Member]
Revenue percentage			13.00%	[1]
Shell Trading US Company [Member]
Revenue percentage	23.00%	[1]	33.00%	[1]	29.00%	[1]	45.00%
Sunoco Inc R&M [Member]
Revenue percentage							10.00%
ExxonMobil Corporation [Member]
Revenue percentage	34.00%	[1]			12.00%	[1]
Predecessor [Member] | ConocoPhillips [Member]
Revenue percentage					11.00%	[1]

[1] In 2012, 2011 and 2010 these percentages are reflective as if the Partnership owned the December 2012 Transferred Properties for the entire year.