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Supplemental Oil And Gas Disclosures (Tables)
 12 Months Ended
Dec. 31, 2011
Supplemental Oil And Gas Disclosures [Abstract]  
Capitalized Costs
      September 30,       September 30,  
       December 31,  
       2011      2010  
       (In thousands)  

Proved oil and gas properties

      $ 1,152,532       $ 479,657   

Less: Accumulated depreciation, depletion, amortization and impairment

        (174,948 )       (98,821 ) 
      

 

 

     

 

 

  

Proved oil and gas properties, net

        977,584         380,836   

Unproved oil and gas properties

        82,825         101,311   
      

 

 

     

 

 

  

Total oil and gas properties, net

      $ 1,060,409       $ 482,147   
      

 

 

     

 

 

  
Costs Incurred In Oil And Natural Gas Property Acquisition, Exploration And Development Activities
      September 30,       September 30,       September 30,  
       Year Ended December 31,  
       2011        2010        2009  
       (In thousands)  

Acquisition costs:

                                 

Proved oil and gas properties

      $ 3,356         $ 20,259         $ 35,134   

Unproved oil and gas properties

        15,197           81,624           13,917   

Exploration costs

        1,685           297           1,019   

Development costs

        618,737           243,758           38,526   

Asset retirement costs

        5,055           968           1,314   
      

 

 

       

 

 

       

 

 

  

Total costs incurred

      $ 644,030         $ 346,906         $ 89,910   
      

 

 

       

 

 

       

 

 

  
Results Of Operations For Oil And Natural Gas Producing Activities

 

      September 30,       September 30,       September 30,  
       December 31,  
       2011        2010        2009  
       (In thousands)  

Revenues

      $ 330,422         $ 128,927         $ 37,755   

Production costs

        67,937           28,350           12,501   

Depreciation, depletion and amortization

        74,101           37,583           16,592   

Exploration costs

        1,685           297           1,019   

Rig termination(1)

        —             —             3,000   

Impairment of oil and gas properties

        3,610           11,967           6,233   

Loss (gain) on sale of properties

        207           —             (1,455 ) 

Income tax expenses

        64,009           17,756           —     
      

 

 

       

 

 

       

 

 

  

Results of operations for oil and gas producing activities

      $ 118,873         $ 32,974         $ (135 ) 
      

 

 

       

 

 

       

 

 

  

(1)

During the first quarter of 2009, we paid a total of $3.0 million in rig termination expenses in connection with early termination of two drilling rig contracts entered into in 2008. We did not have any rig termination expenses during the years ended December 31, 2011 and 2010.