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Property and Equipment
9 Months Ended
Sep. 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
 
September 30,
 
December 31,
 
2013
 
2012
Oil and gas properties:
 

 
 

Proved
$
2,791,757

 
$
2,277,811

Unproved
154,174

 
60,746

Total oil and gas properties
2,945,931

 
2,338,557

Other property and equipment
102,998

 
93,648

Total property and equipment
3,048,929

 
2,432,205

Accumulated depreciation, depletion and amortization
(878,807
)
 
(708,846
)
 
$
2,170,122

 
$
1,723,359