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Transactions with Related Parties (Tables)
 12 Months Ended
Dec. 31, 2013
Related Party Transactions [Abstract]  
Schedule Of Transactions With Related Parties
 
Year Ended December 31,
 
2013
 
2012
 
2011
Revenues:
 
 
 
 
 
Sales of CO2 to Sandhill Group, LLC (1)
$
3,076

 
$
2,905

 
$
2,481

Petroleum products sales to Davison family businesses(2)
1,293

 
1,344

 
1,207

Petroleum products sales to an affiliate of the Quintana Group (2) (3)
—

 
21,143

 
20,888

Expenses:
 
 
 
 
 
Amounts paid to our CEO in connection with the use of his aircraft
$
600

 
$
600

 
$
316

Marine operating fuel and expenses provided by an affiliate of the Quintana Group (3)
—

 
6,260

 
3,568