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Acquisitions and Dispositions of Oil and Gas Properties - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012 acre	Jul. 30, 2012
Business Acquisition [Line Items]
Acquisition of oil and gas properties	$ 587,288,000us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties	$ 478,993,000us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties	$ 350,518,000us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties
Net proceeds from sale of oil and gas properties			119,800,000us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment
Gain on sale of oil and gas properties			26,000,000us-gaap_GainLossOnDispositionOfAssets
JV Partner Participation Cost Per Acre			25,000crk_JVPartnerParticipationCostPerAcre
Joint Venture expected acres per well drilled			80crk_JVExpectedAcresPerWellDrilled
JV partner total working interest per well			33.00%crk_JVPartnerTotalWorkingInterestPerWell
JV partner acreage participation working interest per well			33.00%crk_JVPartnerAcreageParticipationWorkingInterestPerWell
JV partner drilling cost working interest			33.00%crk_JVPartnerDrillingCostWorkingInterestPerWell
Payments received from KKR for initial participation in wells spud				23,800,000crk_PaymentReceivedFromJointVenturePartnerForInitialParticipationInWellsSpud
Payment received from joint venture partner for acreage and facility reimbursements	28,700,000crk_PaymentReceivedFromJointVenturePartnerForAcreageAndFacilityReimbursements	51,500,000crk_PaymentReceivedFromJointVenturePartnerForAcreageAndFacilityReimbursements	8,700,000crk_PaymentReceivedFromJointVenturePartnerForAcreageAndFacilityReimbursements
Formation costs incurred			1,700,000crk_JointVentureFormationCostsIncurred
Burleson County, Texas
Business Acquisition [Line Items]
Acquisition of oil and gas properties	33,900,000us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties / us-gaap_BusinessAcquisitionAxis = crk_BurlesonCountyTexasMember	67,400,000us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties / us-gaap_BusinessAcquisitionAxis = crk_BurlesonCountyTexasMember
Working interest acquired in producing well	30.00%crk_WorkingInterestAcquiredInProducingWell / us-gaap_BusinessAcquisitionAxis = crk_BurlesonCountyTexasMember
Number of oil and gas producing well	1crk_NumberOfOilAndGasProducingWells / us-gaap_BusinessAcquisitionAxis = crk_BurlesonCountyTexasMember	1crk_NumberOfOilAndGasProducingWells / us-gaap_BusinessAcquisitionAxis = crk_BurlesonCountyTexasMember
Oil and gas properties, net acres	9,000crk_AcquisitionOfProspectiveForOilNetAcres / us-gaap_BusinessAcquisitionAxis = crk_BurlesonCountyTexasMember	21,000crk_AcquisitionOfProspectiveForOilNetAcres / us-gaap_BusinessAcquisitionAxis = crk_BurlesonCountyTexasMember
Mississippi and Louisiana
Business Acquisition [Line Items]
Acquisition of oil and gas properties		$ 53,300,000us-gaap_CostsIncurredAcquisitionOfOilAndGasProperties / us-gaap_BusinessAcquisitionAxis = crk_MississippiAndLouisianaMember
Oil and gas properties, net acres		51,000crk_AcquisitionOfProspectiveForOilNetAcres / us-gaap_BusinessAcquisitionAxis = crk_MississippiAndLouisianaMember

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Acquisition of prospective for oil net acres.

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Joint venture formation costs incurred.

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J V expected acres per well drilled.

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J V partner acreage participation working interest per well.

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JV Partner Drilling Cost Working Interest Per Well.

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JV Partner Cost per Acre.

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J V partner total working interest per well.

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Number of oil and gas producing wells.

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Payment received from joint venture partner for acreage and facility reimbursements.

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Payment received from joint venture partner for initial participation in wells spud.

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Working interest acquired in producing well.

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Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 235

-Section 50

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

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The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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