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Commitments And Contingencies (Tables)
12 Months Ended
Dec. 31, 2011
Commitments And Contingencies [Abstract]  
Future Minimum Lease Commitments
         

2012

   $  26,843  

2013

   $ 24,997  

2014

   $ 14,732  

2015

   $ 13,156  

2016

   $ 11,775  

Thereafter

   $ 41,459  
Future Minimum Gathering, Processing And Transportation Fees
         

2012

   $ 151,640  

2013

   $ 217,617  

2014

   $ 262,888  

2015

   $ 311,529  

2016

   $ 329,379  

Thereafter

   $ 1,069,159