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Property and Equipment
3 Months Ended
Mar. 31, 2015
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
 
March 31,
 
December 31,
 
2015
 
2014
Oil and gas properties:
 

 
 

Proved
$
3,533,859

 
$
3,390,482

Unproved
127,504

 
125,676

Total oil and gas properties
3,661,363

 
3,516,158

Other property and equipment
76,058

 
75,073

Total properties and equipment
3,737,421

 
3,591,231

Accumulated depreciation, depletion and amortization
(1,856,809
)
 
(1,766,133
)
 
$
1,880,612

 
$
1,825,098