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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2014
Goodwill [Abstract]  
Schedule of Goodwill [Table Text Block]
A summary of our goodwill accounts is as follows (in thousands):
 
 
Wholesale Marketing and Terminalling
 
Pipelines and Transportation
 
Total
Balance,
December 31, 2011
$
7,499

 
$
—

 
$
7,499

Acquisitions
—

 
2,955

 
2,955

Balance,
December 31, 2012
7,499

 
2,955

 
10,454

Acquisitions
—

 
1,200

 
1,200

Balance,
December 31, 2013
7,499

 
4,155

 
11,654

Balance,
December 31, 2014
$
7,499

 
$
4,155

 
$
11,654