Risk Management and Derivative Instruments - Open Commodity Positions (Detail)	12 Months Ended
Dec. 31, 2020 MMBTU $ / MMBTU $ / bbl bbl
Natural Gas Derivative Contracts Fixed Price Swap 2022 [Member]
Derivative [Line Items]
Average monthly volume (MMBtu) \| MMBTU	590,000
Weighted-average fixed price \| $ / MMBTU	2.48
Natural Gas Derivative Two Way Collars Contracts 2022 [Member]
Derivative [Line Items]
Average monthly volume (MMBtu) \| MMBTU	595,000
Weighted-average floor price	2.37
Weighted-average ceiling price	3.09
Crude Oil Derivative Contracts Fixed Price Swap 2022 [Member]
Derivative [Line Items]
Average monthly volume (Bbls) \| bbl	40,000
Weighted-average fixed price	52.39
Natural Gas P E P L Basis Swaps Two Thousand Twenty Two
Derivative [Line Items]
Average monthly volume (MMBtu) \| MMBTU	0
Weighted-average spread \| $ / MMBTU	0
Crude Oil Derivative Three Way Collars Contracts 2022 [Member]
Derivative [Line Items]
Average monthly volume (Bbls) \| bbl	76,000
Weighted-average floor price	40.00
Weighted-average ceiling price	53.18
Weighted-average sub-floor price	31.32
NGL Derivative Contracts Fixed Price Swap 2022 [Member]
Derivative [Line Items]
Average monthly volume (Bbls) \| bbl	0
Weighted-average fixed price	0
Natural Gas Derivative Contracts Fixed Price Swap 2021 [Member]
Derivative [Line Items]
Average monthly volume (MMBtu) \| MMBTU	925,000
Weighted-average fixed price \| $ / MMBTU	2.49
Natural Gas Derivative Two Way Collars Contracts 2021 [Member]
Derivative [Line Items]
Average monthly volume (MMBtu) \| MMBTU	925,000
Weighted-average floor price	2.10
Weighted-average ceiling price	3.28
Crude Oil Derivative Three Way Collars Contracts 2021 [Member]
Derivative [Line Items]
Average monthly volume (Bbls) \| bbl	42,500
Weighted-average floor price	40.00
Weighted-average ceiling price	50.61
Weighted-average sub-floor price	30.00
Natural Gas P E P L Basis Swaps Two Thousand Twenty One
Derivative [Line Items]
Average monthly volume (MMBtu) \| MMBTU	500,000
Weighted-average spread \| $ / MMBTU	(0.40)
Crude Oil Derivative Contracts Fixed Price Swap 2021 [Member]
Derivative [Line Items]
Average monthly volume (Bbls) \| bbl	181,250
Weighted-average fixed price	45.84
NGL Derivative Contracts Fixed Price Swap 2021 [Member]
Derivative [Line Items]
Average monthly volume (Bbls) \| bbl	22,800
Weighted-average fixed price	24.25

Derivative sub floor price.

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- Definition

Derivative weighted average fixed price.

+ References

No definition available.

+ Details

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- Definition

Derivative weighted average spread.

+ References

No definition available.

+ Details

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- Definition

The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

+ References

No definition available.

+ Details

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- Definition

Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

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