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
Jun. 30, 2021
USD ($)
$ / bbl
Mar. 31, 2021
USD ($)
Jun. 30, 2020
USD ($)
$ / bbl
Jun. 30, 2021
USD ($)
$ / bbl
Jun. 30, 2020
USD ($)
$ / bbl
Dec. 31, 2020
USD ($)
Property, Plant and Equipment [Abstract]            
Proved Oil and Gas Property, Full Cost Method $ 1,701,353     $ 1,701,353   $ 1,545,910
Unproved Oil and Gas Property, Full Cost Method 58,525     58,525   49,935
Oil and Gas Property, Full Cost Method, Gross 1,759,878     1,759,878   1,595,845
Total properties and equipment 1,788,063     1,788,063   1,623,591
Other property and equipment 28,185     28,185   27,746
Accumulated depreciation, depletion, amortization and impairments (954,340)     (954,340)   (900,042)
Property and equipment, net (successful efforts method) 833,723     833,723   723,549
Unproved Oil and Gas Property excluded 58,500     58,500   $ 49,900
Capitalized Costs of Unproved Properties Excluded from Amortization, Period Cost   $ 1,200        
Undeveloped Leasehold Costs Transferred       13,500 $ 4,400  
Capitalized Costs, Proved Properties $ 1,700   $ 1,200 1,700 1,200  
Interest Costs Capitalized       $ 1,600 $ 1,400  
Amortization Expense Per Physical Unit of Production | $ / bbl 12.82   16.66 12.82 16.66  
Impairments of oil and gas properties $ 0   $ 35,509 $ 1,811 $ 35,509