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Derivative Financial Instruments and Hedging Activities - Schedule of Derivative Contracts Volume and Prices (Detail)	12 Months Ended
	Dec. 31, 2021 MMBTU $ / MMBTU $ / bbl
Natural Gas Swap Contracts:
Derivative [Line Items]
Volume (in MMBTU)	121,300,000
Average price (in dollars per MMBTU) | $ / MMBTU	2.67
Natural Gas Swap Contracts: | Swap Contracts for 2022
Derivative [Line Items]
Volume (in MMBTU)	121,300,000
Average price (in dollars per MMBTU) | $ / MMBTU	2.67
Natural Gas Swap Contracts: | Swap Contracts for 2023
Derivative [Line Items]
Volume (in MMBTU)	0
Natural Gas Collar Contracts:
Derivative [Line Items]
Volume (in MMBTU)	147,675,000
Ceiling, average price (in dollars per MMBTU) | $ / MMBTU	3.92
Floor, average price (in dollars per MMBTU) | $ / MMBTU	2.63
Natural Gas Collar Contracts: | Collar Contracts for 2022
Derivative [Line Items]
Volume (in MMBTU)	140,925,000
Ceiling, average price (in dollars per MMBTU) | $ / MMBTU	3.91
Floor, average price (in dollars per MMBTU) | $ / MMBTU	2.62
Natural Gas Collar Contracts: | Collar Contract for 2023
Derivative [Line Items]
Volume (in MMBTU)	6,750,000
Ceiling, average price (in dollars per MMBTU) | $ / MMBTU	4.03
Floor, average price (in dollars per MMBTU) | $ / MMBTU	2.67
Volume (MMBtu)
Derivative [Line Items]
Volume (in MMBTU)	10,950,000
Average price (in dollars per MMBTU) | $ / bbl	(0.16)
Volume (MMBtu) | Basis Swap Contracts For Year Three
Derivative [Line Items]
Volume (in MMBTU)	0
Volume (MMBtu) | Basis Swap Contracts For Year Two
Derivative [Line Items]
Volume (in MMBTU)	10,950,000
Average price (in dollars per MMBTU) | $ / bbl	(0.16)

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.

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- 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.

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- Definition

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

+ References

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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.

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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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