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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Derivative Contracts Volume and Prices (Detail)	3 Months Ended
	Mar. 31, 2022 MMBTU $ / MMBTU
Natural Gas Swap Contracts:
Derivative [Line Items]
Volume (in MMBTU) | MMBTU	88,000,000
Average price (in dollars per MMBtu)	2.68
Natural Gas Swap Contracts: | Swap Contracts for 2022
Derivative [Line Items]
Volume (in MMBTU) | MMBTU	88,000,000
Average price (in dollars per MMBtu)	2.68
Natural Gas Swap Contracts: | Swap Contracts for 2023
Derivative [Line Items]
Volume (in MMBTU) | MMBTU	0
Natural Gas Collar Contracts:
Derivative [Line Items]
Volume (in MMBTU) | MMBTU	233,850,000
Average ceiling (dollars per unit)	7.17
Average floor (dollars per unit)	2.82
Natural Gas Collar Contracts: | Collar Contracts for 2022
Derivative [Line Items]
Volume (in MMBTU) | MMBTU	104,925,000
Average ceiling (dollars per unit)	3.88
Average floor (dollars per unit)	2.62
Natural Gas Collar Contracts: | Collar Contract for 2023
Derivative [Line Items]
Volume (in MMBTU) | MMBTU	128,925,000
Average ceiling (dollars per unit)	9.85
Average floor (dollars per unit)	2.98
Natural Gas Basis Swap Contracts:
Derivative [Line Items]
Volume (in MMBTU) | MMBTU	8,250,000
Average price (in dollars per MMBtu)	(0.16)
Natural Gas Basis Swap Contracts: | Basis Swap Contracts for 2022
Derivative [Line Items]
Volume (in MMBTU) | MMBTU	8,250,000
Average price (in dollars per MMBtu)	(0.16)
Natural Gas Basis Swap Contracts: | Basis Swap Contracts for 2023
Derivative [Line Items]
Volume (in MMBTU) | MMBTU	0

X

- Definition

The average cap rate on a group of price risk derivatives such as caps or collars. 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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X

- Definition

The average floor rate on a group of price risk derivatives such as floors or collars. 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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X

- Definition

The average forward price on the group of price risk forward or futures contracts, such as gas futures contracts.

+ 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

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X

- Definition

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

+ References

No definition available.

+ Details

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- Details

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X

- Details

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