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Property and Equipment
6 Months Ended
Jun. 30, 2013
Property, Plant and Equipment [Abstract]  
Property and Equipment
Property and Equipment
 
The following table summarizes our property and equipment as of the dates presented: 
 
As of
 
June 30,
 
December 31,
 
2013
 
2012
Oil and gas properties:
 

 
 

Proved
$
2,774,854

 
$
2,277,811

Unproved
172,684

 
60,746

Total oil and gas properties
2,947,538

 
2,338,557

Other property and equipment
103,251

 
93,648

Total property and equipment
3,050,789

 
2,432,205

Accumulated depreciation, depletion and amortization
(816,533
)
 
(708,846
)
 
$
2,234,256

 
$
1,723,359