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Property, Plant and Equipment
 9 Months Ended
Sep. 30, 2020
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment consists of the following (in thousands): 
September 30,
2020		December 31, 2019
Oil and natural gas properties
Proved
$1,479,664 $1,484,359 
Unproved
18,653 24,603 
Total oil and natural gas properties
1,498,317 1,508,962 
Less accumulated depreciation, depletion and impairment
(1,367,703)(1,129,622)
Net oil and natural gas properties
130,614 379,340 
Land200 4,400 
Electrical infrastructure121,818 126,482 
Other non-oil and natural gas equipment1,653 12,665 
Buildings and structures3,603 77,148 
Financing leases1,298 2,109 
Total128,572 222,804 
Less accumulated depreciation and amortization
(23,747)(34,201)
Other property, plant and equipment, net
104,825 188,603 
Total property, plant and equipment, net
$235,439 $567,943 

See Note 5 for discussion of impairment of property, plant and equipment, and Note 6 for discussion of the sale of the Company's headquarters in Oklahoma City, OK, which is included in buildings and structures in the table above as of December 31, 2019.