Quarterly report pursuant to Section 13 or 15(d)

Summary of Property and Equipment (Detail)

v3.21.2
Summary of Property and Equipment (Detail)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
$ / bbl
Sep. 30, 2020
USD ($)
$ / bbl
Jun. 30, 2021
USD ($)
Sep. 30, 2021
USD ($)
$ / bbl
Sep. 30, 2020
USD ($)
$ / bbl
Dec. 31, 2020
USD ($)
Property, Plant and Equipment [Abstract]            
Proved Oil and Gas Property, Full Cost Method $ 1,762,268     $ 1,762,268   $ 1,545,910
Unproved Oil and Gas Property, Full Cost Method 59,560     59,560   49,935
Oil and Gas Property, Full Cost Method, Gross 1,821,828     1,821,828   1,595,845
Total properties and equipment 1,850,093     1,850,093   1,623,591
Other property and equipment 28,265     28,265   27,746
Accumulated depreciation, depletion, amortization and impairments (985,215)     (985,215)   (900,042)
Property and equipment, net (successful efforts method) 864,878     864,878   723,549
Unproved Oil and Gas Property excluded 59,600     59,600   $ 49,900
Capitalized Costs of Unproved Properties Excluded from Amortization, Period Cost     $ 1,200      
Undeveloped Leasehold Costs Transferred       13,800 $ 4,500  
Capitalized Costs, Proved Properties $ 2,800 $ 1,300   2,800 1,300  
Interest Costs Capitalized       $ 2,600 $ 2,100  
Amortization Expense Per Physical Unit of Production | $ / bbl 12.96 16.63   12.96 16.63  
Impairments of oil and gas properties $ 0 $ 235,989   $ 1,811 $ 271,498