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Related Party Transactions (Tables)
 9 Months Ended
Sep. 30, 2012
Related Party Transaction [Line Items]  
Schedule of Related Party Transactions [Table Text Block]
A summary of related party revenue, other operating costs and interest expense is as follows:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
2012
 
2011
 
2012
 
2011
Revenue
 
$
1,240

 
$
625

 
$
4,475

 
$
2,055

Other operating costs
 
74

 
393

 
942

 
2,398

Interest expense, net
 
1,151

 
3,884

 
3,319

 
11,197