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Property and Equipment
 12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Property And Equipment
PROPERTY AND EQUIPMENT

 
Successor
 
 
Predecessor
(in thousands)
December 31, 2018
 
 
December 31, 2017
Oil and gas properties
 
 
 
 
Unproved properties
$
816,282

 
 
$
84,590

Accumulated impairment of unproved properties
(742,065
)
 
 
—

Unproved properties, net
74,217

 
 
84,590

Proved oil and gas properties
2,110,346

 
 
1,061,105

Accumulated depreciation, depletion, amortization and impairment
(1,421,226
)
 
 
(251,065
)
Proved oil and gas properties, net
689,120

 
 
810,040

Total oil and gas properties, net
763,337

 
 
894,630

Other property and equipment
 
 
 
 
Land
5,059

 
 
2,912

Fresh water wells
27,366

 
 
—

Produced water disposal system
3,608

 
 
30,990

Office furniture, equipment and vehicles
2,840

 
 
20,008

Accumulated depreciation
(726
)
 
 
(21,770
)
Other property and equipment, net
38,147

 
 
32,140

Total property and equipment, net
$
801,484

 
 
$
926,770



Depreciation and Depletion Expense

 
Successor
 
 
Predecessor
(in thousands)
February 9, 2018
Through
December 31, 2018
 
 
January 1, 2018
Through
February 8, 2018
 
Year Ended
December 31, 2017
 
Year Ended
December 31, 2016
Oil and gas properties depletion
$
130,439

 
 
$
11,021

 
$
83,537

 
$
49,481

Other property and equipment depreciation
2,375

 
 
609

 
5,240

 
4,004

Total depreciation and depletion expense
$
132,814

 
 
$
11,630

 
$
88,777

 
$
53,485



Sale of Produced Water Assets
In November 2018, we sold our produced water assets, consisting of over 200 miles of produced water gathering pipelines and related facilities, along with 20 produced water disposal wells, surface leases, easements and other agreements, net of related obligations, to a subsidiary of Kingfisher Midstream, LLC (“KFM”), a related party and an entity under common control by our parent, AMR, for $98.0 million, including approximately $90.0 million in cash transferred during 2018. The remaining balance owed of approximately $8.0 million is included in related party receivables. No gain or loss was recognized as a result of these transactions. In conjunction with the sale, we entered into a new fifteen-year produced water disposal agreement with KFM. Under that agreement, we recognized expense of $4.7 million during November and December of 2018.