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 (Detail)

v3.8.0.1
Property, Plant and Equipment - Summary of Property, Plant and Equipment Comprised of Fixed Assets and Oil and Gas Properties (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 116,950 $ 116,398
Accumulated depreciation and depletion (909) (542)
Total property, plant and equipment, net 116,041 115,856
Land    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 9,963 9,491
Proved oil and natural gas properties    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 90,952 90,869
Unproved oil and natural gas properties    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 13,000 13,000
Corporate and other    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 3,035 $ 3,038