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Property and Equipment
9 Months Ended
Sep. 30, 2011
Property and Equipment [Abstract] 
PROPERTY AND EQUIPMENT
4. PROPERTY AND EQUIPMENT
Property and equipment consists of the following:
                 
    September 30,     December 31,  
    2011     2010  
    (unaudited)          
    (dollars in thousands)  
OIL AND NATURAL GAS PROPERTIES
               
Unproved properties
  $ 36,923     $ 12,020  
Accumulated impairment
    (5,246 )     (2,686 )
 
           
Unproved properties, net
    31,677       9,334  
 
           
Proved oil and natural gas properties
    876,286       707,364  
Accumulated depreciation, depletion, amortization and impairment
    (352,606 )     (273,818 )
 
           
Proved oil and natural gas properties, net
    523,680       433,546  
 
           
TOTAL OIL AND NATURAL GAS PROPERTIES, net
    555,357       442,880  
 
           
LAND
    1,185       1,185  
 
           
DRILLING RIG
    10,500       10,500  
Accumulated depreciation
    (969 )     (444 )
 
           
TOTAL DRILLING RIG, net
    9,531       10,056  
 
           
OTHER PROPERTY AND EQUIPMENT
               
Office furniture and equipment, vehicles
    6,393       3,844  
Accumulated depreciation
    (1,080 )     (1,701 )
 
           
OTHER PROPERTY AND EQUIPMENT, net
    5,313       2,143  
 
           
TOTAL PROPERTY AND EQUIPMENT, net
  $ 571,386     $ 456,264