XML 32 R21.htm IDEA: XBRL DOCUMENT v3.21.1

Summary of Significant Accounting Policies - Schedule of Derivative Contracts Volume and Prices (Detail)	1 Months Ended	3 Months Ended
	May 05, 2021 MMBTU $ / MMBTU	Mar. 31, 2021 MMBTU $ / bbl $ / MMBTU bbl
Natural Gas Swap Contracts
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		182,878,737
Average price		2.54
Natural Gas Swap Contracts | Subsequent Event
Derivative [Line Items]
Volume (in MMBTU) | MMBTU	14,600,000
Average price	2.70
Natural Gas Swap Contracts | Swap Contracts For Remainder Of Fiscal Year
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		159,228,737
Average price		2.53
Natural Gas Swap Contracts | Swap Contracts for 2022
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		23,650,000
Average price		2.58
Natural Gas Swap Contracts | Swaption Swap Contracts 2021
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		33,000,000
Average price		2.51
Natural Gas 2-Way Collar Contracts
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		129,030,000
Average Ceiling		3.06
Average Floor		2.48
Natural Gas 2-Way Collar Contracts | Collar Contract For Remainder Of Fiscal Year
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		103,630,000
Average Ceiling		3.02
Average Floor		2.47
Natural Gas 2-Way Collar Contracts | Collar Contracts for 2022
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		25,400,000
Average Ceiling		3.24
Average Floor		2.51
Natural Gas Swaptions Call Contracts
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		43,800,000
Average price		2.51
Natural Gas Swaptions Call Contracts | Swap Contracts for 2022
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		43,800,000
Average price		2.51
Natural Gas Swaptions Call Contracts | Swaption Contracts 2022
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		43,800,000
Average price		2.51
Natural Gas Swaptions Call Contracts | Swaption Contracts October 2021
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		36,500,000
Average price		2.52
Natural Gas Swaptions Call Contracts | Swaption Contracts November 2021
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		7,300,000
Average price		2.50
Natural Gas Basis Swap Contracts
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		21,950,000
Average price		(0.14)
Natural Gas Basis Swap Contracts | Swap Contracts For Remainder Of Fiscal Year
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		11,000,000
Average price		(0.12)
Natural Gas Basis Swap Contracts | Swap Contracts for 2022
Derivative [Line Items]
Volume (in MMBTU) | MMBTU		10,950,000
Average price		(0.16)
Crude Oil Collar Contracts
Derivative [Line Items]
Volume (in Barrels) | bbl		412,500
Average Ceiling | $ / bbl		51.67
Average Floor | $ / bbl		41.67
Crude Oil Collar Contracts | Collar Contract For Remainder Of Fiscal Year
Derivative [Line Items]
Volume (in Barrels) | bbl		412,500
Average Ceiling | $ / bbl		51.67
Average Floor | $ / bbl		41.67

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

Name:	us-gaap_DerivativeAverageCapPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

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

Name:	us-gaap_DerivativeAverageFloorPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

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

Name:	us-gaap_DerivativeAverageForwardPrice
Namespace Prefix:	us-gaap_
Data Type:	srt-types:perUnitItemType
Balance Type:	na
Period Type:	instant

X

- 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

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure
Namespace Prefix:	us-gaap_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix:	us-gaap_
Data Type:	num:volumeItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=crk_NaturalGasContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TradingActivityByTypeAxis=crk_SwapContractsForRemainderOfFiscalYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TradingActivityByTypeAxis=crk_SwapContractsForYearTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TradingActivityByTypeAxis=crk_SwaptionSwapContractsTwentyTwentyOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=crk_NaturalGasContractTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TradingActivityByTypeAxis=crk_CollarContractForRemainderOfFiscalYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TradingActivityByTypeAxis=crk_CollarContractsForYearTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=crk_NaturalGasSwaptionsCallContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TradingActivityByTypeAxis=crk_SwaptionContractsTwoThousandTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TradingActivityByTypeAxis=crk_SwaptionContractsOctoberTwoThousandTwentyOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TradingActivityByTypeAxis=crk_SwaptionContractsNovemberTwoThousandTwentyOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=crk_BasisSwapContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=crk_CrudeOilContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: