Transactions with Related Parties (Schedule Of Transactions With Related Parties) (Details) (USD $) In Thousands, unless otherwise specified					12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010		Dec. 31, 2012 Quintana Group [Member]		Dec. 31, 2011 Quintana Group [Member]		Dec. 31, 2010 Quintana Group [Member]		Dec. 31, 2012 Sandhill [Member]		Dec. 31, 2011 Sandhill [Member]		Dec. 31, 2010 Sandhill [Member]		Dec. 31, 2012 Davison [Member]		Dec. 31, 2011 Davison [Member]		Dec. 31, 2010 Davison [Member]		Dec. 31, 2012 General Partners [Member]		Dec. 31, 2011 General Partners [Member]		Dec. 31, 2010 General Partners [Member]		Dec. 31, 2012 Pipeline Transportation And Supply And Logistics Services [Member] Denbury [Member]	Dec. 31, 2011 Pipeline Transportation And Supply And Logistics Services [Member] Denbury [Member]	Dec. 31, 2010 Pipeline Transportation And Supply And Logistics Services [Member] Denbury [Member]		Dec. 31, 2012 Supply and Logistics Products And Services [Member] Denbury [Member]	Dec. 31, 2011 Supply and Logistics Products And Services [Member] Denbury [Member]	Dec. 31, 2010 Supply and Logistics Products And Services [Member] Denbury [Member]		Dec. 31, 2012 Class A [Member] Quintana Group [Member]	Dec. 31, 2012 Class A [Member] Davison [Member]	Oct. 05, 2012 Class A [Member] Davison [Member]	Dec. 31, 2012 Class B [Member] Quintana Group [Member]	Dec. 31, 2012 Class B [Member] Davison [Member]	Oct. 05, 2012 Class B [Member] Davison [Member]	Dec. 31, 2011 Sandhill Group, LLC [Member]
Related Party Transaction [Line Items]
Related party transaction, revenues					$ 21,143	[1]	$ 20,888	[1]	$ 3,740	[1],[2]	$ 2,905	[3]	$ 2,481	[3]	$ 2,706	[2],[3]	$ 1,344	[1]	$ 1,207	[1]	$ 1,081	[1],[2]							$ 0	$ 0	$ 3,059	[2]
Related party transaction, expenses					6,260	[1]	3,568	[1]	2,443	[1],[2]													0	[4]	0	[4]	47,035	[2],[4]					0	0	373	[2]
Amounts paid to our CEO in connection with the use of his aircraft	$ 600	$ 316	$ 0	[2]			$ 100
Percentage of equity interest																																					12.00%	17.00%	17.20%	74.00%	76.90%	76.90%	50.00%

[1] The Quintana Group, a private equity fund based in Houston, Texas owned 12% of our Class A common units and 74% of our Class B common units until October 5, 2012 when the Quintana Group monetized all of its remaining investment in us. Substantially in connection with that transaction, certain members of the Davison family, collectively, increased their investment in us to 17.2% of our Class A common units and 76.9% of our Class B common units. At December 31, 2012, certain members of the Davison family, collectively, owned 17% of our Class A common units and 76.9% of our Class B common units. Solely for financial statement purposes, we will continue to treat the Davison family and their affiliates as related parties.

[2] Affiliates of Denbury Resources, Inc. sold its interests in our general partner in February 2010. Transactions with Denbury are included in the table as a related party through that date.

[3] We own a 50% interest in Sandhill Group, LLC.

[4] Our general partner became a wholly-owned subsidiary in December 2010.