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Property And Equipment
9 Months Ended
Sep. 30, 2011
Property And Equipment [Abstract] 
Property And Equipment

(5) Property and Equipment:

Property and equipment at September 30, 2011 and December 31, 2010 consisted of the following:

 

(Thousands of dollars)    September 30,
2011
     December 31,
2010
 

Proved oil and gas properties, at cost

   $ 476,679       $ 453,145   

Unproved oil and gas properties, at cost

     —           698   

Less: Accumulated depletion and depreciation

     347,964         310,809   
  

 

 

    

 

 

 
   $ 128,715       $ 143,034   

Field service equipment and other

   $ 21,306       $ 19,499   

Less: Accumulated depreciation

     13,316         12,705   
  

 

 

    

 

 

 
   $ 7,990       $ 6,794   
  

 

 

    

 

 

 

Total net property and equipment

   $ 136,705       $ 149,828