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Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2011
Commitments and Contingencies [Abstract] 
Future minimum transportation fees
         
    Transportation  
    Commitments  
2011 (remaining)
  $ 22,880  
2012
    91,235  
2013
    90,588  
2014
    90,113  
2015
    87,182  
Thereafter
    510,508  
 
     
 
  $ 892,506