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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Summary of Property and Equipment
The following table summarizes our property and equipment as of the dates presented: 
 
As of December 31,
 
2015
 
2014
Oil and gas properties:
 

 
 

Proved
$
2,678,415

 
$
3,390,482

Unproved 1
6,881

 
125,676

Total oil and gas properties
2,685,296

 
3,516,158

Other property and equipment
31,365

 
75,073

Total property and equipment
2,716,661

 
3,591,231

Accumulated depreciation, depletion and amortization 1
(2,372,266
)
 
(1,766,133
)
 
$
344,395

 
$
1,825,098