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PROPERTY AND EQUIPMENT
 12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
PROPERTY AND EQUIPMENT PROPERTY AND EQUIPMENT
(in thousands)
December 31, 2019
 
December 31,
2018
Oil and gas properties
 
 
 
Unproved properties
$
813,310

 
$
816,282

Accumulated impairment of unproved properties
(813,310
)
 
(742,065
)
Unproved properties, net
—

 
74,217

Proved oil and gas properties
2,239,444

 
2,110,346

Accumulated depreciation, depletion, amortization and impairment
(2,024,092
)
 
(1,421,226
)
Proved oil and gas properties, net
215,352

 
689,120

Total oil and gas properties, net
215,352


763,337

Other property and equipment
 
 
 
Land
5,690

 
5,600

Fresh water wells
27,373

 
27,366

Produced water disposal system
108,966

 
104,498

Gas processing plant and gathering lines
414,615

 
380,470

Office furniture, equipment and vehicles
3,397

 
3,703

Accumulated depreciation and impairment
(453,013
)
 
(77,368
)
Other property and equipment, net
107,028

 
444,269

Total property and equipment, net
$
322,380


$
1,207,606



Depreciation and Depletion

 
Successor
 
 
Predecessor
(in thousands)
Year Ended December 31, 2019
 
February 9, 2018
Through
December 31, 2018
 
 
January 1, 2018
Through
February 8, 2018
Oil and gas properties depletion
$
118,003

 
$
129,579

 
 
$
11,021

Midstream tangible asset depreciation
11,663

 
8,235

 
 
—

Other property and equipment depreciation
1,646

 
3,236

 
 
609

Total depletion and depreciation
$
131,312

 
$
141,050

 
 
$
11,630


Sale of Produced Water Assets

In November 2018, Alta Mesa sold its produced water assets, consisting of over 200 miles of produced water gathering pipelines and 20 disposal wells, surface leases, easements and other agreements, to a subsidiary of KFM for approximately $99 million, including approximately $90 million in cash at closing and $9 million of purchase price adjustments which, in total, approximated the net book value of the produced water assets.  This transaction was accounted for as a transfer of assets among entities under common control and recorded at carrying value. Accordingly, no gain or loss was recognized. In conjunction with the sale, Alta Mesa entered into a new fifteen-year produced water disposal agreement with KFM.