Transactions With Related Parties

3 Months Ended

Mar. 31, 2012

Transactions With Related Parties [Abstract]

Transactions With Related Parties

11. Transactions with Related Parties

Sales, purchases and other transactions with affiliated companies, in the opinion of management, are conducted under terms no more or less favorable than then-existing market conditions. The transactions with related parties were as follows:

	Three Months Ended March 31,
	2012		2011
Petroleum products sales to an affiliate of the Robertson Group (1)	$	10,188	$	9,721
Marine operating fuel and expenses provided by an affiliate of the Robertson Group (1)		1,957		1,040
Sales of CO2 to Sandhill Group, LLC (2)		613		543
Petroleum products sales to Davison family businesses (1)		312		242
Amounts paid to our CEO in connection with the use of his aircraft		150		—

(1) The Robertson Group owned 9% of our Class A common units and 74% of our Class B common units at March 31, 2012. The Davison family owned 16% of our Class A common units at March 31, 2012.

(2) We own a 50% interest in Sandhill Group, LLC.

Amounts due to and from Related Parties

At March 31, 2012 and December 31, 2011, an affiliate of the Robertson Group owed us $3 million and $1.9 million, respectively, for petroleum product sales. We owed the affiliate $0.2 million and $0.1 million, respectively, for marine related costs. Sandhill Group, LLC owed us $0.2 million at both March 31, 2012 and December 31, 2011 for purchases of CO₂.