Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment - Summary of Property, Plant and Equipment Comprised of Fixed Assets and Oil and Gas Properties (Details)

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Property, Plant and Equipment - Summary of Property, Plant and Equipment Comprised of Fixed Assets and Oil and Gas Properties (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment at cost $ 106,366 $ 80,003
Accumulated DD&A (47,424) (38,764)
Right of use asset — financing leases 58,176 20,018
Total property, plant and equipment, net 117,118 61,257
Land and land improvement    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment at cost 15,284 13,808
Proved properties    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment at cost 76,406 62,227
Wells in progress    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment at cost 11,200 492
Corporate and other    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment at cost $ 3,476 $ 3,476