Annual report pursuant to Section 13 and 15(d)

Summary of Property and Equipment (Detail)

v3.10.0.1
Summary of Property and Equipment (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
$ / bbl
Dec. 31, 2017
USD ($)
$ / bbl
Dec. 31, 2016
$ / bbl
Sep. 12, 2016
$ / bbl
Property, Plant and Equipment [Line Items]        
Proved Oil and Gas Property, Full Cost Method $ 1,037,993 $ 460,029    
Undeveloped Leasehold Costs Transferred 82,800 40,400    
Interest Costs Capitalized 9,100 2,700    
Unproved Oil and Gas Property excluded 63,500 117,600    
Capitalized Costs, Proved Properties 3,700 2,400    
Oil and gas properties:        
Unproved Oil and Gas Property, Full Cost Method 63,484 117,634    
Oil and Gas Property, Full Cost Method, Gross 1,101,477 577,663    
Other property and equipment 20,383 12,712    
Total property and equipment 1,121,860 590,375    
Accumulated depreciation, depletion and amortization (193,866) (61,316)    
Property and equipment, net (successful efforts method) $ 927,994 $ 529,059    
Successor [Member]        
Property, Plant and Equipment [Line Items]        
Amortization Expense Per Physical Unit of Production | $ / bbl 16.11 12.87 11.21  
Predecessor [Member]        
Property, Plant and Equipment [Line Items]        
Amortization Expense Per Physical Unit of Production | $ / bbl       10.04