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Property and Equipment (Tables)
 3 Months Ended
Mar. 31, 2016
Property, Plant and Equipment [Abstract]  
Components of Property and Equipment

Property and equipment at March 31, 2016 and December 31, 2015 consisted of the following:

 

(Thousands of dollars)    March 31,
2016		      December 31,
2015		  

Proved oil and gas properties, at cost

    $ 403,525       $ 395,129   

Less: Accumulated depletion and depreciation

      (208,648 )       (204,213 ) 
  

 

 

     

 

 

  

Oil and Gas Properties, Net

    $ 194,877       $ 190,916   
  

 

 

     

 

 

  

Field and office equipment

    $ 27,491       $ 27,919   

Less: Accumulated depreciation

      (16,953 )       (16,824 ) 
  

 

 

     

 

 

  

Field and Office Equipment, Net

    $ 10,538       $ 11,095   
  

 

 

     

 

 

  

Total Property and Equipment, Net

    $ 205,415       $ 202,011