Annual report pursuant to Section 13 and 15(d)

Commodity Derivative Positions (Detail)

v3.20.4
Commodity Derivative Positions (Detail)
Dec. 31, 2020
bbl
$ / bbl
First Quarter 2021 [Member] [Domain] | 2-Way Collars [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 40.00
Derivative, Cap Price 45.78
Derivative, Nonmonetary Notional Amount | bbl 9,722
First Quarter 2021 [Member] [Domain] | 2-Way Collars [Domain] | Natural Gas [Member]  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 2.607
Derivative, Cap Price 3.117
Derivative, Nonmonetary Notional Amount | bbl 10,000
First Quarter 2021 [Member] [Domain] | Put Option [Member] | Natural Gas [Member]  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 6,667
Derivative, Swap Type, Average Fixed Price 2.000
First Quarter 2021 [Member] [Domain] | Swap [Member] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 3,889
Derivative, Swap Type, Average Fixed Price 54.38
First Quarter 2021 [Member] [Domain] | Purchased Put [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 1,667
Derivative, Swap Type, Average Fixed Price 55.00
First Quarter 2021 [Member] [Domain] | Basis Swap [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 8,889
Derivative, Swap Type, Average Fixed Price 1.16
First Quarter 2021 [Member] [Domain] | CMA Roll Basis Swap [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 14,444
Derivative, CMA Roll Basis Swap, Price (0.18)
First Quarter 2021 [Member] [Domain] | Sold Put [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 556
Derivative, Swap Type, Average Fixed Price 26.50
Second Quarter 2021 [Member] [Domain] | 2-Way Collars [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 42.84
Derivative, Cap Price 51.70
Derivative, Nonmonetary Notional Amount | bbl 10,440
Second Quarter 2021 [Member] [Domain] | 2-Way Collars [Domain] | Natural Gas [Member]  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 2.607
Derivative, Cap Price 3.117
Derivative, Nonmonetary Notional Amount | bbl 9,890
Second Quarter 2021 [Member] [Domain] | Put Option [Member] | Natural Gas [Member]  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 6,593
Derivative, Swap Type, Average Fixed Price 2.000
Second Quarter 2021 [Member] [Domain] | Swap [Member] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 3,297
Derivative, Swap Type, Average Fixed Price 55.89
Second Quarter 2021 [Member] [Domain] | CMA Roll Basis Swap [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 13,187
Derivative, CMA Roll Basis Swap, Price 0.07
Second Quarter 2021 [Member] [Domain] | Sold Put [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 11,538
Derivative, Swap Type, Average Fixed Price 36.93
Third Quarter 2021 [Member] [Domain] | 2-Way Collars [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 40.35
Derivative, Cap Price 51.85
Derivative, Nonmonetary Notional Amount | bbl 9,239
Third Quarter 2021 [Member] [Domain] | 2-Way Collars [Domain] | Natural Gas [Member]  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 2.607
Derivative, Cap Price 3.117
Derivative, Nonmonetary Notional Amount | bbl 9,783
Third Quarter 2021 [Member] [Domain] | Put Option [Member] | Natural Gas [Member]  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 6,522
Derivative, Swap Type, Average Fixed Price 2.000
Third Quarter 2021 [Member] [Domain] | Swap [Member] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 815
Derivative, Swap Type, Average Fixed Price 45.54
Third Quarter 2021 [Member] [Domain] | CMA Roll Basis Swap [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 13,043
Derivative, CMA Roll Basis Swap, Price 0.07
Third Quarter 2021 [Member] [Domain] | Sold Put [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 5,707
Derivative, Swap Type, Average Fixed Price 35.14
Fourth Quarter 2021 [Member] [Domain] | 2-Way Collars [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 40.40
Derivative, Cap Price 52.10
Derivative, Nonmonetary Notional Amount | bbl 8,152
Fourth Quarter 2021 [Member] [Domain] | 2-Way Collars [Domain] | Natural Gas [Member]  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 2.607
Derivative, Cap Price 3.117
Derivative, Nonmonetary Notional Amount | bbl 9,783
Fourth Quarter 2021 [Member] [Domain] | Put Option [Member] | Natural Gas [Member]  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 6,522
Derivative, Swap Type, Average Fixed Price 2.000
Fourth Quarter 2021 [Member] [Domain] | Swap [Member] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 815
Derivative, Swap Type, Average Fixed Price 45.54
Fourth Quarter 2021 [Member] [Domain] | CMA Roll Basis Swap [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 13,043
Derivative, CMA Roll Basis Swap, Price 0.07
Fourth Quarter 2021 [Member] [Domain] | Sold Put [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Nonmonetary Notional Amount | bbl 5,707
Derivative, Swap Type, Average Fixed Price 35.14
First Quarter 2022 [Domain] | 2-Way Collars [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 40.00
Derivative, Cap Price 50.00
Derivative, Nonmonetary Notional Amount | bbl 2,917
Second Quarter 2022 [Domain] | 2-Way Collars [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 40.00
Derivative, Cap Price 50.00
Derivative, Nonmonetary Notional Amount | bbl 2,885
Third Quarter 2022 [Domain] | 2-Way Collars [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 40.00
Derivative, Cap Price 50.00
Derivative, Nonmonetary Notional Amount | bbl 2,853
Fourth Quarter 2022 [Domain] | 2-Way Collars [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 40.00
Derivative, Cap Price 50.00
Derivative, Nonmonetary Notional Amount | bbl 2,853
First Quarter 2023 [Domain] | 2-Way Collars [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 40.00
Derivative, Cap Price 50.00
Derivative, Nonmonetary Notional Amount | bbl 2,917
Second Quarter 2023 [Domain] | 2-Way Collars [Domain] | Crude Oil  
Derivative Instruments Related to Oil and Gas Production [Line Items]  
Derivative, Floor Price 40.00
Derivative, Cap Price 50.00
Derivative, Nonmonetary Notional Amount | bbl 2,855