CRK


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:DebtInstrument

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:InterestExpense
us-gaap:DebtInstrument
us-gaap:InterestExpenseLongTermDebt

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ProfitLoss

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService

us-gaap:Revenues

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:OtherAssetsCurrent
us-gaap:BalanceSheetLocation

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:TaxesPayableCurrent
us-gaap:CreditFacility
us-gaap:LongTermDebt
us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:ShareBasedCompensation
us-gaap:IncomeStatementLocation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument
us-gaap:BusinessAcquisition, us-gaap:StatementClassOfStock
us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsValuationAllowance

crk:DerivativeCashReceivedPaidOnHedge

crk:ExplorationExpenseIncludingUnprovedImpairmentsAndExploratoryDryHoleCosts

crk:GasGatheringAndTransportationCost

crk:LeaseOperatingExpenses

crk:NetIncomeLossAvailableToCommonStockholdersBasicAdjusted

crk:NoncashExplorationExpenseIncludingUnprovedImpairmentsAndExploratoryDryHoleCosts

crk:NoncashOrPartNoncashAcquisitionWorkingCapital

crk:NoncashOrPartNoncashIncreaseDecreaseInAccruedCapitalExpenditure

crk:PreferredStockDividendsAndAccretion

crk:ProductionAndSeveranceTaxesOperatingExpense

crk:RetirementOfDebtInExchangeForCommonStock

crk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedWeightedAverageNumber
us-gaap:AwardType
crk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnrecognizedCompensationCost
us-gaap:StatementScenario, us-gaap:StatementClassOfStock
crk:TemporaryEquityAggregateCommonStockConversionShares

crk:TemporaryEquityDividendsOnTemporaryEquityValue
us-gaap:StatementEquityComponents

crk:WeightedAverageNumberOfSharesConvertiblePreferredStock

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
us-gaap:StatementEquityComponents

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount

us-gaap:AssetRetirementObligationAccretionExpense

us-gaap:AssetRetirementObligationLiabilitiesIncurred

us-gaap:AssetRetirementObligationLiabilitiesSettled

us-gaap:CurrentStateAndLocalTaxExpenseBenefit

us-gaap:DeferredFederalIncomeTaxExpenseBenefit

us-gaap:DeferredStateAndLocalIncomeTaxExpenseBenefit
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType, us-gaap:TradingActivityByType
us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNonmonetaryNotionalAmountVolume
us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments

us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3

us-gaap:GainLossOnDerivativeInstrumentsNetPretax
us-gaap:TradingActivityByType

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:GainLossOnSaleOfCommodityContracts

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:OperatingLeaseCost
us-gaap:IncomeStatementLocation

us-gaap:OperatingLeasePayments

us-gaap:PaymentOfFinancingAndStockIssuanceCosts

us-gaap:PaymentsForRepurchaseOfPreferredStockAndPreferenceStock
us-gaap:DebtInstrument
us-gaap:PaymentsOfDebtExtinguishmentCosts

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt
us-gaap:DebtInstrument

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfSeniorDebt
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RevenueFromRelatedParties

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:StatementEquityComponents
us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

crk:AccruedAdValoremTaxesPayable

crk:AccruedCapitalExpenditures

crk:AccruedDrillingCosts

crk:AccruedLeaseOperatingExpenses

crk:AccruedTransactionCosts

crk:AccruedTransportationCosts
us-gaap:BusinessAcquisition
crk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsProvedOilAndNaturalGasProperties
us-gaap:BusinessAcquisition
crk:BusinessCombinationRecognizedIdentifiableConsiderationAndLiabilitiesAssumed

crk:CapitalizedCostsLeaseHoldCosts

crk:CommitmentsForContractedDrillingServices

crk:ContractualObligationToBePaidAfterYearTwo

crk:DeferredTaxAssetsInterestExpenseLimitation
us-gaap:IncomeTaxAuthority
crk:DeferredTaxAssetsTaxCreditCarryforwardsInterestExpense

crk:DeferredTaxLiabilitiesAmortizationOfBondDiscount
us-gaap:RelatedPartyTransactionsByRelatedParty
crk:DerivativeAssetRelatedParty
us-gaap:DerivativeInstrumentRisk
crk:DerivativeAveragePutPrice
us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType
us-gaap:IncomeTaxAuthority
crk:EstimatedNetOperatingLossTaxCreditCarryforwardsToExpireUnusedAmount

crk:ExpectedFuturePaymentsForContractedDrillingServices

crk:LongTermDebtPrincipalAmount
us-gaap:CreditFacility
us-gaap:DebtInstrument
us-gaap:AwardType
crk:PerformanceShareUnitsOutstandingWeightedAverageGrantDateFairValue

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows

srt:StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent

us-gaap:AccountsReceivableRelatedParties
us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AssetRetirementObligationsNoncurrent
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

us-gaap:CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities

us-gaap:CapitalizedCostsOilAndGasProducingActivitiesNet

us-gaap:CapitalizedCostsProvedProperties

us-gaap:CapitalizedCostsUnprovedProperties

us-gaap:CapitalizedCostsWellsAndRelatedEquipmentAndFacilities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:ContractualObligationDueAfterFifthYear

us-gaap:ContractualObligationDueInFifthYear

us-gaap:ContractualObligationDueInFourthYear

us-gaap:ContractualObligationDueInNextTwelveMonths

us-gaap:ContractualObligationDueInSecondYear

us-gaap:ContractualObligationDueInThirdYear

us-gaap:ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear
us-gaap:CreditFacility
us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument
us-gaap:DebtInstrument
us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:DebtInstrument
us-gaap:DebtInstrumentUnamortizedPremium
us-gaap:CreditFacility
us-gaap:DebtWeightedAverageInterestRate

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:TradingActivityByType
us-gaap:DerivativeAssetFairValueGrossLiability
us-gaap:TradingActivityByType
us-gaap:DerivativeAssets

us-gaap:DerivativeAssetsCurrent
us-gaap:BalanceSheetLocation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:TradingActivityByType

us-gaap:DerivativeAssetsNoncurrent
us-gaap:BalanceSheetLocation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAverageCapPrice
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAverageFloorPrice
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAverageForwardPrice
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType, us-gaap:TradingActivityByType
us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:TradingActivityByType
us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:DerivativeLiabilities
us-gaap:TradingActivityByType

us-gaap:DerivativeLiabilitiesCurrent
us-gaap:BalanceSheetLocation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:TradingActivityByType

us-gaap:DerivativeLiabilitiesNoncurrent
us-gaap:BalanceSheetLocation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:DerivativeNonmonetaryNotionalAmount
us-gaap:TradingActivityByType

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs

us-gaap:InterestPayableCurrent

us-gaap:LesseeOperatingLeaseDiscountRate

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
us-gaap:CreditFacility
us-gaap:LongTermDebtFairValue
us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
us-gaap:CreditFacility

us-gaap:OilAndGasJointInterestBillingReceivablesCurrent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:PropertyPlantAndEquipmentOther

us-gaap:ProvedOilAndGasPropertySuccessfulEffortMethod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:IncomeTaxAuthority
us-gaap:TaxCreditCarryforwardAmount

us-gaap:UnamortizedDebtIssuanceExpense

us-gaap:UnprovedOilAndGasPropertySuccessfulEffortMethod

Plots across concepts


IncomeStatement
Income Loss From Continuing Operations 
Before Income Taxes Extraordinary Items Noncontrolling Interest
Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Derivative Liabilities
Current Liabilities
Operating Lease Liability Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Income Loss
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Diluted Shares Outstanding
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:CommonStockValue █████▆▆▅▁▁▁▁116.425116.206116.206116.21116.2994.9995.00392.76252.97152.93452.93652.94NA8.1317.7397.64226.57423.86323.86423.78823.42923.9323.93223.91923.8423.84224.15824.15224.08124.058
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock█████▇▇▆▄▄▄▄▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂232.85232.411232.415232.421232.58189.981190.007185.524105.942105.868105.871105.87916.37916.26115.47915.28453.14947.72547.72847.57646.85847.86147.86447.83747.68147.68548.31648.30448.16248.115
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁231.428231.377NA231.223208.904285.166NA171.487105.457105.457NA105.46315.468NANANANA46.1546.12246.027NA46.65147.00446.749NA46.5746.75446.7346.42646.372
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁231.428231.377NA231.223208.904188.916NA171.487105.457105.457NA105.44815.468NANANANA46.1546.12246.027NA46.65146.65146.599NA46.5746.75446.7346.42646.372
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount █▁1.1921.136NA1.1360.9760.927NA0.862NANANANANANANANA0.0590.1030.1040.111NA0.1150.1150.115NA0.1150.1340.157NANA
us-gaap:EarningsPerShareBasic ▁▂▇▂▄▆▇▅▆▆█▆-0.8-0.60.38-0.57-0.290.160.22-0.010.20.130.480.13NANANANANA-11.81-2.93-1.71-1.26-0.040.040.02-0.82-0.522.68-0.58-0.220.14
us-gaap:EarningsPerShareDiluted ▁▂▇▂▄▆▆▅▆▆█▆-0.8-0.60.38-0.57-0.290.150.19-0.010.20.130.480.13NANANANANA-11.81-2.93-1.71-1.26-0.040.040.02-0.82-0.522.68-0.58-0.220.14
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
 TTM Greenblatt ROC _ _██▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▁▅▆▆▇▇▇▆▆▆▆▆▇146.496159.726102.73912.3653.91144.017101.68176.3643.62153.22481.4534.5818.2287.39910.472.381-56.49-596.026-182.185-96.928-80.2910.26327.72920.228-24.386-9.086-18.004-20.856-4.0921.487
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:GainsLossesOnExtinguishmentOfDebt ▅▁███-114.06-238.5390.00.0-0.861NANANANANANANANANANANA33.3851.0547.267-2.735NANANANA-17.854NANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFiveNANANA-1.80.9NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▆▆▄▇▇▇▅▆▅▆▆▁▁▅▅▅▄▄▅▆▅▆█▇▇▆▇▇▇▇7.8728.0286.0498.9748.2988.7196.4848.1056.8417.8148.0963.3033.0446.9566.5596.4015.5755.6537.1767.9666.4697.9279.6148.3698.7718.1539.0568.7879.0338.798
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▄▅█▅▆▇▇▇▇▇▇▇▇▆▇▇▆▁▅▆▆▇▇-247.872-164.092118.89-172.615-61.32153.41967.73610.63828.50917.80965.30317.763-16.26-34.125-20.925-22.496-52.117-575.642-207.742-120.13-84.411-2.3933.151NANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▁▄█▃▅▆▆▆▆▆▇▆▆▆▆▆▆▄▁▃▄▆▆▆▄▅▅▅▅▆-68.177-29.96736.967-46.123-11.44511.39112.623.8477.1024.23415.0043.940.605-0.1220.5170.4354.46-30.646-72.674-41.628-26.14-0.491.2530.688-19.365-12.554-11.996-12.242-7.7727.989
us-gaap:InterestExpense ▇███▆▆▆▆▃▃▃▁▂▅▄▄▃▄▄▂▁▁▁▁▁▂▂▂▁▁56.8863.81166.06563.8952.06452.8154.10751.01528.56827.85128.75814.84522.1440.21336.75532.929.94432.15933.80720.75415.27214.91214.76713.6815.89420.5319.2417.57814.52913.237
 us-gaap:InterestExpenseLongTermDebt us-gaap:DebtInstrument crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySixNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet █▁106.62597.99NA53.3935.34555.207NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▅▅█▅▆▇▇▇▇▇▇▇▆▆▆▆▆▁▅▆▆▇▇▇▆▆█▆▇▇-179.695-134.12581.923-126.492-49.87642.02855.1166.79121.40713.57550.29913.823-16.865-34.003-21.442-22.931-56.577-544.996-135.068-78.502-58.271-1.9031.8981.165-37.498-24.034129.705-27.144-10.3046.859
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁█-179.695-134.125NA-126.492-49.87642.028NA6.79121.40713.57550.29913.823-16.865-34.003-21.442-22.931-56.577-544.996-135.068-78.502-58.271-1.9031.8981.165-37.498-24.034129.705-27.144-10.3046.859
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▁▂█▂▄▇▇▆▆▆▇▆▅-184.058-138.4477.523-130.89-60.00229.95640.829-1.33721.31813.52250.29913.823-16.865NANANANA-544.996-135.068-78.502NA-2.0541.7451.026NANANANA-10.3046.61
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted NA-138.4477.523-130.89-60.00241.99163.029-1.33721.31813.52250.10213.772NANANANANA-544.996-135.068-78.502NA-2.0541.7451.026NANANANA-10.3046.61
us-gaap:NonoperatingIncomeExpense ▁▂█▅▇█▇▇▇▇▇▇▇▇▇▇██▇▇██▇▇▇▇▇▇▇█-394.368-323.81816.151-184.98-65.2329.402-33.945-65.722-15.112-35.415-16.147-16.818-24.488-41.524-31.395-24.8774.37320.384-25.557-23.202-4.12-2.656-24.578-18.375-31.62-27.502-15.523-15.903-13.98413.361
us-gaap:OperatingExpenses ▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁▁▂█▄▃▃▂▂▂▂▂▂▂▂▂197.197180.759172.032165.646175.624181.861187.567148.08484.49573.65772.04835.54224.3654.0551.00151.4293.393657.386259.497163.45192.907144.72127.994121.681130.246120.676125.905115.876129.12115.575
us-gaap:OperatingIncomeLoss ██▇▇▇▇▇▇▇▇▇▇▇▇▇▇▆▁▅▆▆▇▇▇▆▆▆▆▆▇146.496159.726102.73912.3653.91144.017101.68176.3643.62153.22481.4534.5818.2287.39910.472.381-56.49-596.026-182.185-96.928-80.2910.26327.72920.228-24.386-9.086-18.004-20.856-4.0921.487
us-gaap:OtherNonoperatingIncomeExpense █▁0.530.281NA0.489-0.0090.313NA0.0920.155NANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▁▂█▂▄▇▇▆▆▆▇▆-179.695-134.12581.923-126.492-49.87642.02855.1166.79121.40713.57550.29913.823NANANANANANANANANANANANANANANANANANA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ██▆▄▄▅▇▅▃▃▄▂▁▂▂▁▁▂▂▂▃▄▄▃▃▃▃▂▃▃343.693340.485274.771178.011179.535225.878289.248224.444128.116126.881153.49870.12332.58861.44961.47153.80136.90361.3677.31266.522112.616144.983155.723141.909105.86111.59107.90195.02110.667110.499
us-gaap:Revenues ██▆▄▄▅▇▅▃▃▄▂▁▂▂▁▁▂▂▂▃▄▄▃▃▃▃▂▃▃343.693340.485274.771178.011179.535225.878289.248224.444128.116126.881153.49870.12332.58861.44961.47153.80136.90361.3677.31266.522112.616144.983155.723141.909105.86111.59107.90195.02110.667110.499
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:Assets ███▇▇██▇▁▁▁▁4764.2484735.1484623.9834502.8544533.4184643.7414657.1224552.3092282.8962221.8882187.842094.376NA921.333901.831865.9861085.1361529.6742205.2582480.1612274.3372322.3512300.2592260.9382139.3982277.3892262.2222622.5072661.3122710.672
us-gaap:Liabilities █▇▆▆▆▆▆▆▁▁▁▁3641.8383430.1553182.213140.1743040.9173087.2653134.5173107.1111677.0721638.0941618.2691573.265NA1363.7541207.1381151.4021305.3551414.3761547.0031688.5351404.0651382.7251355.5251314.9321187.3931285.151233.8411720.6251620.0191683.315
us-gaap:LiabilitiesAndStockholdersEquity ███▇▇██▇▁▁▁▁4764.2484735.1484623.9834502.8544533.4184643.7414657.1224552.3092282.8962221.8882187.842094.376NA921.333901.831865.9861085.1361529.6742205.2582480.1612274.3372322.3512300.2592260.9382139.3982277.3892262.2222622.5072661.3122710.672
us-gaap:StockholdersEquity ▇▇█▇█▇▇▇▅▅▅▅▁▁▂▂▂▃▅▆▆▇▇▇▇▇▇▆▇▇947.411129.9931266.7731187.681317.5011174.3931143.0221070.198605.824583.794569.571521.111-458.454-442.421-305.307-285.416-220.219115.298658.255791.626870.272939.626944.734946.006952.005992.2391028.381901.8821041.2931027.357
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:AssetsCurrent ▅▆▄▂▃▇█▇▂▁▂▁224.878244.043199.81149.83187.61267.837289.685268.398151.441134.123159.427131.472NA202.14975.38357.719149.359191.851268.63265.27561.21786.15790.19779.33857.134325.18334.506673.72586.062176.799
us-gaap:CashAndCashEquivalentsAtCarryingValue ▁▂▁▁▁▁▁▁▁▁▁▁█▂▁▁▂▂▂▃▁▁▁▁▁▃▃▁▁▁19.72777.43530.27228.26811.59515.52718.53253.24346.74729.32423.19331.78894.187158.37835.32130.4489.323163.84130.214228.8962.0716.4333.8131.7712.967228.353263.7376.8443.5053.75
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▂█▃▃▁▁▂▅19.72777.43530.27228.26811.59515.52718.53253.243NANA23.193NANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent █▇▆▃▂▃▆▄▁▂▃▁144.358126.503125.01687.96575.36983.594120.11197.7562.7976.77287.61161.003NA21.51822.54718.40411.75119.6826.99523.15732.84946.6157.63552.80235.86739.7739.05738.42134.65545.01
us-gaap:OtherAssetsCurrent ▃▃▆▅▅▆▄▅▁▂▆█8.419.16314.83911.77313.20214.22710.39913.1024.146.22213.82919.07NA4.4822.7321.4621.8842.9332.5052.41910.1053.5472.7452.3521.7967.35.1434.8326.6952.908
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment █▇▆▆▅▄▃▂▂▂▁▁1132.1911011.065902.261798.288699.584596.591486.473374.838294.767248.017210.556174.52NA2096.413077.83047.6922945.2833083.8792459.922397.1032305.0082150.3462050.5671955.9791867.3011786.371700.8311630.9481353.0711233.116
us-gaap:PropertyPlantAndEquipmentNet ████▇█▇▇▁▁▁▁4195.7734144.4464084.554012.3484000.6434029.1134008.8033917.011765.4451722.5581667.9791593.602NA698.69825.479807.262934.6211315.351911.8072188.6562198.1692220.4332193.4982166.2752066.7351936.8131909.8091929.842547.2192517.672
us-gaap:Goodwill ▁▁▁▁▁▁▁▁████335.897335.897335.897335.897335.897335.897335.897335.897350.214350.214350.214349.667NANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▇█▁▂▃▂▂▂▃▄6.8337.2013.0253.5543.9923.8283.5093.9094.3814.773NANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▁▁▁▁▄▄▄▁▅▁▁█0.0370.0370.040.040.2310.2310.2310.0030.3280.0020.0020.549NA1.4080.9691.0051.15622.47324.82126.2314.95115.76116.56415.32515.52913.57617.90718.94221.79616.201
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:AccountsPayableCurrent █▇▇▄▃▅▆▅▂▂▂▁292.998280.696259.284202.174173.411215.338252.994231.707154.122155.574138.767124.008NA153.38772.45557.07341.58351.21360.806116.285117.329126.744128.938112.725101.872120.16482.67986.54795.691148.633
us-gaap:AccruedLiabilitiesCurrent ▅▄▇▅▅▅▇█▃▁▃▂105.2189.923133.019112.695103.459107.081137.166155.75672.4740.50568.08653.261NA35.45638.16317.39830.66739.76449.748.88244.84256.80142.13553.04391.29760.68638.21487.77972.27393.295
us-gaap:LiabilitiesCurrent █▅▅▄▃▃▄▄▂▁▁▁655.525433.584441.592380.782290.966327.619392.376389.46228.625198.086206.853180.118NA189.073110.61874.47172.2590.977110.726165.167162.171184.913179.667168.536194.995378.618122.126225.851176.726250.06
us-gaap:OperatingLeaseLiabilityCurrent ▅▄▇██▄▁▁▂▁2.192.1452.2842.3182.3312.1571.9941.9972.0332.007NANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent ▄█▇▆▇█▇▇▂▁▂▄2.9614.4453.9953.4853.934.3614.0924.0232.1821.6881.8982.927NA1.8481.7661.1584.4536.5168.845.446.9628.2178.1057.1219.2049.0984.2097.14914.48610.555
us-gaap:TaxesPayableCurrent 5.661NA2.168NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
 us-gaap:LongTermDebt us-gaap:CreditFacility us-gaap:LineOfCredit▁▂▁▁▄███475.0550.0500.0500.0800.01250.01250.01265.0NANA450.0NANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:FairValueByFairValueHierarchyLevel crk:SeniorNotesFivePointEightSevenFivePercentDueTwoThousandThirty,us-gaap:FairValueInputsLevel1965.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:FairValueByFairValueHierarchyLevel crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix,us-gaap:FairValueInputsLevel1NA844.0681577.8241575.554NANA820.057NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:FairValueByFairValueHierarchyLevel crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFive,us-gaap:FairValueInputsLevel1▁▁██191.774189.304473.728467.917NANA455.768NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:FairValueByFairValueHierarchyLevel crk:SeniorNotesSixPointSevenFivePercentDueTwoThousandTwentyNine,us-gaap:FairValueInputsLevel1▁█1257.2571257.443NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent ██▇▇▆▇▆▇▁▁▁▁2847.3092800.4782517.1492507.6692501.8032507.2842500.1322508.0741267.391265.8471244.3631242.844NA1153.3331070.241051.3571210.5821297.3121379.4341393.6531070.4451000.298975.151949.14798.7688.26883.3241334.9571223.2351207.042
us-gaap:DeferredIncomeTaxLiabilitiesNet ▁▅▇▅█99.245170.433200.583163.55211.566NA211.772NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▁▁▁▂▄▆█0.180.4790.4921.1622.8694.5946.351NANANANANANANANANANANANANA2.0022.0251.8032.0912.1382.1832.2022.262.3372.394
us-gaap:OperatingLeaseLiabilityNoncurrent ▇█▁▂▂▃▂▃▄▄4.6745.0680.741.2361.6611.6711.5151.9122.3482.766NANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ██▁▁1.9831.9270.5620.529NANA1.689NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ██▁▁1.7331.7080.1960.182NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour 0.001NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:StockholdersEquity ▇▇█▇█▇▇▇▅▅▅▅▁▁▂▂▂▃▅▆▆▇▇▇▇▇▇▆▇▇947.411129.9931266.7731187.681317.5011174.3931143.0221070.198605.824583.794569.571521.111-458.454-442.421-305.307-285.416-220.219115.298658.255791.626870.272939.626944.734946.006952.005992.2391028.381901.8821041.2931027.357
us-gaap:CommonStockValue █████▆▆▅▁▁▁▁116.425116.206116.206116.21116.2994.9995.00392.76252.97152.93452.93652.94NA8.1317.7397.64226.57423.86323.86423.78823.42923.9323.93223.91923.8423.84224.15824.15224.08124.058
us-gaap:AdditionalPaidInCapital █████▂▂▁1098.31097.0441095.3841093.8111092.662910.851909.423879.669NANA452.513NANANANANANANANANANANANANANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▄▆▅▇██▇▇▇▆▆-267.315-83.25755.183-22.341108.549168.552138.59697.76799.10477.69764.12213.823NA-1003.128-860.207-838.765-737.277-392.157152.839287.907366.409430.564438.449442.534447.349490.807520.837397.173520.932531.236
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ███▅▅▆▇▅▄▄▅▁192.311193.272185.746123.864115.972150.119168.431109.7898.31174.71598.6933.609NANANANANANANANA72.001123.688109.55495.74155.71797.5510.6697.3528.718133.18
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇██▇▇▁██▇█-173.017-165.551-178.853-98.471-90.384-143.49-177.937-823.6-80.808-88.494-111.588-50.046NANANANANANANANA-132.425-140.011-124.891-237.46-172.169-117.704704.89-101.66-18.137-146.423
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▅▅▅▅▅▅█▅▅▅▁-77.00219.442-4.889-8.72-29.52-9.634-25.205720.316-0.0819.914.308-815.97NANANANANANANANA56.06218.94317.379140.523-108.934-15.23-458.6576.6819.1748.533
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▇█████▇████▁-57.70847.1632.00416.673-3.932-3.005-34.7116.49617.4236.131-8.587-862.407NANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit ▁█-71.131-30.15NA-46.237-11.53611.33NA3.7757.0784.352NA3.883NA-0.1460.4960.3594.446-31.333-73.094-41.691-26.164-0.4171.230.674-19.499-12.554-11.993-12.245-7.6568.072
us-gaap:DepreciationDepletionAndAmortization █▇▇▇▇▇▇▅▃▃▂▁▁▂▂▂▃▅▆▆▆▇▆▆▅▆▆▆▆▅121.446109.128104.28499.056103.347110.425111.84280.24746.84737.5936.12417.8214.08226.79830.32129.90538.83679.44590.57391.88994.88599.97794.53988.87481.16185.76285.24484.96790.08379.097
us-gaap:IncreaseDecreaseInAccountsReceivable ▇▅█▅▃▁█▃▄▄▆█33.1587.03244.8273.79-28.875-54.29745.184-27.67-9.951-10.78316.16444.884NA2.1727.6092.048-4.287-8.152-2.044-15.081-23.088-8.3996.3922.876-37.06527.4251.03619.724-9.796-1.815
us-gaap:NetCashProvidedByUsedInOperatingActivities ███▅▅▆▇▅▄▄▅▁192.311193.272185.746123.864115.972150.119168.431109.7898.31174.71598.6933.609NANANANANANANANA72.001123.688109.55495.74155.71797.5510.6697.3528.718133.18
us-gaap:NetIncomeLoss ▅▅█▅▆▇▇▇▇▇▇▇▆▆▆▆▆▁▅▆▆▇▇▇▆▆█▆▇▇-179.695-134.12581.923-126.492-49.87642.02855.1166.79121.40713.57550.29913.823-16.865-34.003-21.442-22.931-56.577-544.996-135.068-78.502-58.271-1.9031.8981.165-37.498-24.034129.705-27.144-10.3046.859
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁█-179.695-134.125NA-126.492-49.87642.028NA6.79121.40713.57550.29913.823-16.865-34.003-21.442-22.931-56.577-544.996-135.068-78.502-58.271-1.9031.8981.165-37.498-24.034129.705-27.144-10.3046.859
us-gaap:ProfitLoss ▁▂█▂▄▇▇▆▆▆▇▆-179.695-134.12581.923-126.492-49.87642.02855.1166.79121.40713.57550.29913.823NANANANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation █▇██▇▆▇▅▂▃▃▁1.7991.691.731.7521.5521.431.6611.0880.6230.6480.6650.329NA1.5081.551.2651.332.0792.091.8922.8552.8452.7342.2633.2243.1213.2223.2183.3253.535
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇██▇▇▁██▇█-173.017-165.551-178.853-98.471-90.384-143.49-177.937-823.6-80.808-88.494-111.588-50.046NANANANANANANANA-132.425-140.011-124.891-237.46-172.169-117.704704.89-101.66-18.137-146.423
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment █▇█▃▃▆█▅▂▃▄▁173.028165.751177.06298.75490.384143.49178.039130.95382.8594.939110.76959.017NA44.09747.42838.40114.18535.63356.236141.027132.425140.011124.891237.46171.891117.52770.76862.058164.209184.128
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▅▅▅▅▅▅█▅▅▅▁-77.00219.442-4.889-8.72-29.52-9.634-25.205720.316-0.0819.914.308-815.97NANANANANANANANA56.06218.94317.379140.523-108.934-15.23-458.6576.6819.1748.533
us-gaap:RepaymentsOfLongTermDebt NA1260.0NANANANANANANANANA1291.352NANANANANA82.527NANA0.00.0NANA297.7750.0NANANANA
 us-gaap:RepaymentsOfLongTermDebt us-gaap:DebtInstrument crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySixNA777.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:BusinessAcquisition,us-gaap:StatementClassOfStock crk:CoveyParkEnergyLLC,crk:ConvertibleSeriesAPreferredStockNANA7.5e-06NANANA7.5e-087.5e-08NANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value116116116116116949592525252528.1318.0797.7147.7147.7397.6426.9696.6926.2532623232323232323232323242424242424242323232323
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.52.52.62.62.02.02.02.32.42.42.50.90.90.80.90.90.90.80.80.62.42.01.61.11.01.01.01.01.11.11.01.10.90.90.90.90.90.91.11.11.21.21.3

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value2322322322322321891901851051051051051616161515151513131253474747474647474747474848484848484847474747474645
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-08-132015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value23123123120828517110510510515464646464746464646464646464545454545
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-08-132015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value23123123120818817110510510515464646464646464646464646464545454545
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value1192000.01136000.01136000.0976000.0927000.0862000.012000.012000.059000.0103000.0104000.0111000.0115000.0115000.0115000.0115000.0134000.0157000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.8-0.60.38-0.57-0.290.160.22-0.010.20.130.480.13-11.81-2.93-1.71-1.26-0.040.040.02-0.82-0.522.68-0.58-1.68-0.56-0.220.14-0.890.030.080.05-0.45-0.1-0.040.16
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-0.8-0.60.38-0.57-0.290.150.19-0.010.20.130.480.13-11.81-2.93-1.71-1.26-0.040.040.02-0.82-0.522.68-0.58-1.68-0.56-0.220.14-0.890.030.080.05-0.45-0.1-0.040.16
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312013-12-31
Value-114.06-238.5390.00.0-0.861-1.064100563323517.267-2.735-17.854
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-33.2-70.10.00.0-0.50.00.00.090.50.083.29.4-4.10.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument

crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFive


Gains
Period End2020-09-302020-05-312020-06-30
Value-1.8-0.90.9
Percentage of GainsLossesOnExtinguishmentOfDebt0.0-104.50.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.00.00.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFive0.00.00.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.8728.0286.0498.9748.2988.7196.4848.1056.8417.8148.0963.3033.0446.9566.0167.0036.1746.5596.4018.5374.1885.6635.5752.7465.6537.1767.9666.4697.9279.6148.3698.7718.1539.0568.7877.8258.1429.0338.7989.1998.6288.9178.4288.2359.49.7649.801
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.32.40.05.04.63.92.23.65.36.25.34.79.311.30.00.00.010.711.90.00.00.015.10.09.29.312.00.05.56.25.90.07.38.49.20.00.08.28.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-247.872-164.092118-172.615-61.32153671028176517-16.26-34.125-41.304-61.123-24.805-20.925-22.496-51.487-29.3014.94-52.117-298.04-575.642-207.742-120.13-84.411-2.3933.151
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-72.1-48.20.0-97.0-34.223.623.44.722.314.042.525.3-49.9-55.50.00.00.0-34.0-41.80.00.00.0-141.20.0-938.1-268.7-180.60.0-1.72.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-68.177-29.96736-46.123-11.44511123.8477.1024.234153.940.605-0.1220.582-18.827-0.0690.5170.4353.446-0.8250.0884.46-9.497-30.646-72.674-41.628-26.14-0.491.2530.688-19.365-12.554-11.996-12.242-35.992-11.579-7.7727.989-21.2743.462.5820.608-4.778-0.208-0.0210.161
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-19.8-8.80.0-25.9-6.45.04.41.75.53.39.85.61.9-0.20.00.00.00.80.80.00.00.012.10.0-49.9-94.0-62.60.0-0.30.80.50.0-11.3-11.1-12.90.00.0-7.07.20.00.00.00.00.00.00.00.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value566366635252545128272814224038393736323831282931323320151414131520191719171413129.98810106.9057.1087.5997.844
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.518.70.035.929.023.418.722.722.322.018.721.267.965.40.00.00.059.861.20.00.00.081.10.052.443.731.20.010.39.59.60.018.417.818.50.00.013.112.00.00.00.00.00.00.00.00.0

Interest Expense Long Term Debt

us-gaap:InterestExpenseLongTermDebt us-gaap:DebtInstrument

us-gaap:InterestExpenseLongTermDebt

crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix


Interest
Period End2021-06-29
Value31
Percentage of InterestExpenseLongTermDebt100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix0.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value10697533555
Percentage of InterestPaidNet100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax31.028.830.019.724.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-179.695-134.12581-126.492-49.87642556.79121135013-16.865-34.003-41.886-42.296-24.736-21.442-22.931-54.933-28.4764.852-56.577-288.543-544.996-135.068-78.502-58.271-1.9031.8981.165-37.498-24.034129-27.144-78.151-25.988-10.3046.859-41.1341.3093.9492.404-20.609-4.7-1.6197.342
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-52.3-39.40.0-71.1-27.818.619.13.016.710.732.819.7-51.8-55.30.00.00.0-34.9-42.60.00.00.0-153.30.0-888.2-174.7-118.00.0-1.31.20.80.0-21.5120.2-28.60.00.0-9.36.20.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-179.695-134.125-126.492-49.876426.79121135013-16.865-34.003-41.886-42.296-24.736-21.442-22.931-54.933-28.4764.852-56.577-288.543-544.996-135.068-78.502-58.271-1.9031.8981.165-37.498-24.034129-27.144-70.627-25.988-10.3046.859-41.1341.3093.9492.404
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.090.4100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-52.3-39.4-71.1-27.818.63.016.710.732.819.7-51.8-55.30.00.00.0-34.9-42.60.00.00.0-153.30.0-888.2-174.7-118.00.0-1.31.20.80.0-21.5120.2-28.60.00.0-9.36.20.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-184.058-138.4477-130.89-60.0022940-1.33721135013-16.865-544.996-135.068-78.502-2.0541.7451.026-70.627-25.988-10.3046.61-40.8661.2643.8132.317-20.609-4.7-1.619
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-53.6-40.70.0-73.5-33.413.314.1-0.616.610.732.819.7-51.8-888.2-174.7-118.0-1.41.10.70.00.0-9.36.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-138.4477-130.89-60.0024163-1.33721135013-544.996-135.068-78.502-2.0541.7451.026-70.627-25.988-10.3046.61-40.8661.2643.8132.317-20.609-4.7-1.619
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-40.70.0-73.5-33.418.621.8-0.616.610.732.619.6-888.2-174.7-118.0-1.41.10.70.00.0-9.36.00.00.00.00.00.00.00.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-394.368-323.81816-184.98-65.2329.402-33.945-65.722-15.112-35.415-16.147-16.818-24.488-41.524-36.182-36.899-35.995-31.395-24.877-45.68269274.373-7.52520-25.557-23.202-4.12-2.656-24.578-18.375-31.62-27.502-15.523-15.9032.251-17.382-13.98413-8.891-7.317-1.847114.023-7.003-1.763-7.685
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-114.7-95.10.0-103.9-36.34.2-11.7-29.3-11.8-27.9-10.5-24.0-75.1-67.60.00.00.0-51.1-46.20.00.00.011.80.033.2-33.1-34.90.0-1.8-15.8-12.90.0-24.6-14.4-16.70.00.0-12.612.10.00.00.00.00.00.00.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value197180172165175181187148847372352454779755515154149639333765725916319214412712113012012511523213712911516710710496102779090
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax57.453.10.093.197.880.564.866.066.058.146.950.774.888.00.00.00.083.095.60.00.00.0253.10.01071.4335.6245.70.099.882.285.70.0108.1116.7121.90.00.0116.7104.60.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value146159102123.9114410176435381348.2287.399-5.122-24.22411102.381-5.805-98.789-22.706-56.49-290.515-596.026-182.185-96.928-80.2910.2632720-24.386-9.086-18.004-20.856-102.036-20.185-4.0921.487-53.517128.378-8.263-29.412.0950.12315
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax42.646.90.06.92.219.535.234.034.041.953.149.325.212.00.00.00.017.04.40.00.00.0-153.10.0-971.4-235.6-145.70.00.217.814.30.0-8.1-16.7-21.90.00.0-3.71.30.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value530000.0281000.0489000.0-9000.0313000.092000.0155000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.3-0.00.10.00.1

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-179.695-134.12581-126.492-49.87642556.79121135013
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-52.3-39.40.0-71.1-27.818.619.13.016.710.732.819.7

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
Value34334027417817922528922412812615370326161533661776611214415514110511110795110110
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

us-gaap:NaturalGasProduction


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-30
Value321323261168172207260193919010736325650
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax93.595.195.194.696.091.790.086.271.871.070.351.998.591.682.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax93.595.195.194.696.091.790.086.271.871.070.351.998.591.682.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NaturalGasProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OilAndCondensate


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-30
Value2216139.6377.173182930363645330.4995.18411
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.54.94.95.44.08.310.013.828.229.029.748.11.58.417.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.54.94.95.44.08.310.013.828.229.029.748.11.58.417.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OilAndCondensate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-302017-03-312016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-06-302012-03-31
Value34334027417817922528922412812615370326161533661776611214415514110511110795110110
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value476447354623450245334643465745522282222121872094921910930899901865889885104710851195152922052480227423222300226021392277226226222567265726612710263921962168206319641858
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value36413430318231403040308731343107167716381618157313631320129912281207115111611105125413051367141415471688140413821355131411871285123317201633164616201683160211331091983895792
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets76.472.468.869.767.166.567.368.373.573.774.075.1148.0145.0139.7136.5133.9133.0130.5124.8119.8120.3114.392.570.268.161.759.558.958.255.556.454.565.663.661.960.962.160.751.650.347.745.642.7

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value476447354623450245334643465745522282222121872094921910930899901865889885104710851195152922052480227423222300226021392277226226222567265726612710263921962168206319641858
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value9471129126611871317117411431070605583569521-458.454-442.421-409.922-369.272-328.444-305.307-285.416-271.269-220.023-207.267-220.219-171.258115658791870939944946952992102890193310111041102710371063107710791068106610621039
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.923.927.426.429.125.324.523.526.526.326.024.90.0-48.0-45.0-39.7-36.5-33.9-33.0-30.5-24.8-19.8-20.3-14.37.529.831.938.340.541.141.844.543.645.534.436.438.139.137.939.348.449.752.354.457.30.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value10981097109510931092910909879453453452454553552549546545543541531526518490485483481479480485482479480477483480480477473470468464460457454434415386
Percentage of StockholdersEquity115.997.186.592.182.977.679.682.274.977.679.487.2-120.6-124.8-134.1-148.0-166.0-178.1-189.7-196.1-239.2-250.4-222.7-283.5419.473.260.655.251.651.150.750.548.147.053.351.547.245.545.845.243.742.842.442.540.839.237.2
Percentage of Assets23.123.223.724.324.119.619.519.319.920.420.721.70.059.960.458.860.660.362.559.859.449.645.240.631.621.819.421.120.921.021.222.521.021.418.318.718.017.817.417.821.221.322.223.123.40.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value116116116116116949592525252528.1898.1318.0797.7147.7147.7397.6426.9696.6926.25326232323232323232323232424242424242423232323232322
Percentage of StockholdersEquity12.310.39.29.88.88.18.38.78.79.19.310.2-1.8-1.8-2.0-2.1-2.3-2.5-2.7-2.6-3.0-3.0-12.1-13.920.73.63.02.72.52.52.52.52.42.32.72.62.42.32.32.32.22.22.22.22.22.22.2
Percentage of Assets2.42.52.52.62.62.02.02.02.32.42.42.50.00.90.90.80.90.90.90.80.80.62.42.01.61.11.01.01.01.01.11.11.01.10.90.90.90.90.90.91.11.11.21.21.30.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-267.315-83.25755-22.3411081681389799776413-1019.993-1003.128-969.125-927.239-884.943-860.207-838.765-815.834-760.901-732.425-737.277-680.7-392.157152287366430438442447490520397424494520531524565564560557577613361
Percentage of StockholdersEquity-28.2-7.44.4-1.98.214.412.19.116.413.311.32.7222.5226.7236.4251.1269.4281.8293.9300.7345.8353.4334.8397.5-340.123.236.442.145.846.446.847.049.550.644.045.548.950.051.750.553.252.451.952.254.257.834.8
Percentage of Assets-5.6-1.81.2-0.52.43.63.02.14.33.52.90.70.0-108.9-106.4-99.7-98.4-95.4-96.9-91.7-85.9-69.9-67.9-56.9-25.66.911.616.118.519.119.620.921.623.015.116.518.619.619.619.925.826.027.228.431.10.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2242441991491872672892681511341591312022083026575579076130149156191268265618690795732533467377888617611389130140135273
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.75.24.33.34.15.86.25.96.66.07.36.321.922.932.57.38.46.710.18.712.513.813.112.512.210.72.73.73.93.52.714.314.825.73.03.33.26.54.34.16.06.86.914.7

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value1977302811151853462923318941585061253530652667891341631302282.0716.4333.8131.7712.9672282636.8444.4712.5693.5053.758.464.5443.5564.1961.7324.3542122906.2815.565
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.41.60.70.60.30.30.41.22.01.31.11.50.017.25.66.62.83.93.57.43.06.48.211.210.75.99.20.10.30.20.10.110.011.70.30.20.10.10.10.30.20.20.20.10.00.00.04.90.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value197730281115185323
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.41.60.70.60.30.30.41.21.1

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value14412612587758312097627687612126262422181916161115192623324657523539393836423445474040342831
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.02.72.72.01.71.82.62.12.83.54.02.92.32.92.92.72.52.12.21.91.51.11.31.31.20.91.42.02.52.31.71.71.71.51.41.61.31.71.81.91.91.71.51.7

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value8.419.1631411131410134.146.22213194.4822.8472.7452.4942.7321.4621.8241.9752.3391.8841.9932.9332.5052.419103.5472.7452.3521.7967.35.1434.8326.9547.6586.6952.9083.2553.832135.7964.6754.259
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.30.30.30.30.20.30.20.30.60.90.50.30.30.30.30.20.20.20.20.20.20.20.10.10.40.20.10.10.10.30.20.20.30.30.30.10.10.20.60.30.20.2

us-gaap:OtherAssetsCurrent us-gaap:BalanceSheetLocation

crk:AdvancePaymentsForDrillingCosts


Other
Period End2020-12-312018-12-31
Value1.7959.336
Percentage of OtherAssetsCurrent12.167.5
Percentage of Assets0.00.4
Percentage of Assets crk:AdvancePaymentsForDrillingCosts0.00.0

crk:OtherOtherCurrentAssets


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value0.222.2352.1280.3380.6410.7950.0380.0580.0490.085
Percentage of OtherAssetsCurrent1.521.515.412.335.139.90.43.20.72.6
Percentage of Assets0.00.00.10.00.10.10.00.00.00.0
Percentage of Assets crk:OtherOtherCurrentAssets0.00.00.00.00.00.00.00.00.00.0

crk:PipeInventory


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value3.084.5030.9120.9981.1831.1981.3791.3881.9222.314
Percentage of OtherAssetsCurrent20.843.36.636.464.960.113.677.327.671.1
Percentage of Assets0.10.10.00.10.10.10.10.10.10.1
Percentage of Assets crk:PipeInventory0.00.00.00.00.00.00.00.00.00.0

crk:PrepaidExpenses


Other
Period End2020-12-312019-12-312014-12-312013-12-312012-12-312011-12-31
Value1.8292.0050.4870.350.30.397
Percentage of OtherAssetsCurrent12.319.34.819.54.312.2
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets crk:PrepaidExpenses0.00.00.00.00.00.0

crk:ProductionTaxRefundsReceivable


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-31
Value7.9153.6611.4531.4090.3031.83
Percentage of OtherAssetsCurrent53.335.210.551.316.626.3
Percentage of Assets0.20.10.10.20.00.1
Percentage of Assets crk:ProductionTaxRefundsReceivable0.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value113210119027986995964863742942482101742096206920423087307730473018298629492945339730832459239723052150205019551867178617001630159214751353123313531214113710621002850
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.821.419.517.715.412.810.48.212.911.29.68.3227.5227.3219.6343.2341.3351.9339.2337.3281.6271.4284.1201.6111.596.7101.392.689.186.587.378.475.262.262.055.550.845.551.355.352.451.551.045.7

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value4195414440844012400040294008391717651722166715936986826078338258077988079159341038131519112188219822202193216620661936190919292470254625472517250920902021190418161576
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets88.187.588.389.188.286.886.186.077.377.576.276.175.874.965.392.691.593.289.891.287.486.186.886.086.788.296.795.695.495.896.685.084.473.696.295.895.792.995.195.293.292.392.584.8

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-14
Value335335335335335335335335350350350349349
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.17.17.37.57.47.27.27.415.315.816.016.70.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6833000.07201000.03025000.03554000.03992000.03828000.03509000.03909000.04381000.04773000.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.20.10.10.10.10.10.10.20.2

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value0.0370.0370.040.040.2310.2310.2310.0030.3280.0020.0020.5491.4080.5490.8990.9340.9691.0051.041.0761.1211.1561.19222242614151615151317181920211616151617129.288
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.20.10.10.10.10.10.10.10.10.10.11.51.11.10.70.70.70.70.70.60.80.70.80.80.80.60.60.70.80.80.60.5

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2922802592021732152522311541551381241531251269272574537464157516011611712612811210112082868698951489411013412312367
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.15.95.64.53.84.65.45.16.87.06.35.916.613.813.510.38.06.65.14.34.43.84.83.32.84.75.25.55.65.04.85.33.73.33.43.73.65.53.65.06.26.06.33.6

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value10589133112103107137155724068533527421938174020403038394948445642539160388747957293854126212120
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.21.92.92.52.32.32.93.43.21.83.12.53.83.04.62.24.22.04.52.33.82.83.22.62.32.02.02.41.82.34.32.71.73.31.83.62.73.43.21.91.21.11.11.1

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6554334413802903273923892281982061801891671681121107491588672959011016516218417916819437812222513920017625018715317216115594
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.89.29.68.56.47.18.48.610.08.99.58.620.518.418.112.512.38.610.36.68.36.78.05.95.06.77.18.07.87.59.116.65.48.65.47.56.69.27.17.07.97.87.95.1

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2190000.02145000.02284000.02318000.02331000.02157000.01994000.01997000.02033000.02007000.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.10.10.00.00.00.10.1

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value2.9614.4453.9953.4853.934.3614.0924.0232.1821.6881.8982.9271.8480.9841.0291.5331.7661.1581.6284.3295.4814.4534.0636.5168.845.446.9628.2178.1057.1219.2049.0984.2097.149111514102421
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.20.10.10.20.20.10.20.50.50.40.30.40.40.20.30.40.40.30.40.40.20.30.40.60.50.40.91.1

Taxes Payable Current

us-gaap:TaxesPayableCurrent

us-gaap:TaxesPayableCurrent


Taxes
Period End2021-06-302020-12-31
Value5661000.02168000.0
Percentage of TaxesPayableCurrent100.0100.0
Percentage of Assets0.10.0

Long Term Debt

us-gaap:LongTermDebt us-gaap:CreditFacility

us-gaap:LongTermDebt

us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value475550500500800125012501265450
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.011.610.811.117.626.926.827.820.6
Percentage of Assets us-gaap:LineOfCredit0.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel

crk:SeniorNotesFivePointEightSevenFivePercentDueTwoThousandThirty, us-gaap:FairValueInputsLevel1


Long
Period End2021-06-30
Value965
Percentage of LongTermDebt203.2
Percentage of Assets20.3
Percentage of Assets crk:SeniorNotesFivePointEightSevenFivePercentDueTwoThousandThirty us-gaap:FairValueInputsLevel10.0

crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix, us-gaap:FairValueInputsLevel1


Long
Period End2021-03-312020-12-312020-09-302019-12-31
Value84415771575820
Percentage of LongTermDebt153.5315.6315.165.6
Percentage of Assets17.834.135.017.6
Percentage of Assets crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix us-gaap:FairValueInputsLevel10.00.00.00.0

crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFive, us-gaap:FairValueInputsLevel1


Long
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value191189473467455
Percentage of LongTermDebt40.434.494.793.636.5
Percentage of Assets4.04.010.210.49.8
Percentage of Assets crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFive us-gaap:FairValueInputsLevel10.00.00.00.00.0

crk:SeniorNotesSixPointSevenFivePercentDueTwoThousandTwentyNine, us-gaap:FairValueInputsLevel1


Long
Period End2021-06-302021-03-31
Value12571257
Percentage of LongTermDebt264.7228.6
Percentage of Assets26.426.6
Percentage of Assets crk:SeniorNotesSixPointSevenFivePercentDueTwoThousandTwentyNine us-gaap:FairValueInputsLevel10.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value2847280025172507250125072500250812671265124412421153113111101089107010511044102511451210124912971379139310701000975949798688883133413241238122312071196746691596513470
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets59.859.154.455.755.254.053.755.155.557.056.959.3125.2124.3119.4121.1118.7121.4117.4115.8109.4111.6104.584.862.656.247.143.142.442.037.330.239.050.951.646.646.044.545.334.031.928.926.125.3

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value99170200163211211
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0
Percentage of Assets2.13.64.33.64.74.5

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value180000.0479000.0492000.01162000.02869000.04594000.06351000.02002000.02025000.01803000.02091000.02138000.02183000.02202000.02260000.02273000.02301000.02337000.02394000.02442000.02453000.02499000.02540000.02580000.00
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.0

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4674000.05068000.0740000.01236000.01661000.01671000.01515000.01912000.02348000.02766000.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.00.00.00.00.00.00.10.1

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1983000.01927000.0562000.0529000.01689000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1733000.01708000.0196000.0182000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-30
Value1000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-30
Value6865000.07214000.03025000.03554000.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0
Percentage of Assets0.10.20.10.1

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value7175000.07565000.03124000.03687000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets0.20.20.10.1

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value310000.0351000.099000.0133000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value9471129126611871317117411431070605583569521-458.454-442.421-409.922-369.272-328.444-305.307-285.416-271.269-220.023-207.267-220.219-171.258115658791870939944946952992102890193310111041102710371063107710791068106610621039
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.923.927.426.429.125.324.523.526.526.326.024.90.0-48.0-45.0-39.7-36.5-33.9-33.0-30.5-24.8-19.8-20.3-14.37.529.831.938.340.541.141.844.543.645.534.436.438.139.137.939.348.449.752.354.457.30.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value10981097109510931092910909879453453452454553552549546545543541531526518490485483481479480485482479480477483480480477473470468464460457454434415386
Percentage of StockholdersEquity115.997.186.592.182.977.679.682.274.977.679.487.2-120.6-124.8-134.1-148.0-166.0-178.1-189.7-196.1-239.2-250.4-222.7-283.5419.473.260.655.251.651.150.750.548.147.053.351.547.245.545.845.243.742.842.442.540.839.237.2
Percentage of Assets23.123.223.724.324.119.619.519.319.920.420.721.70.059.960.458.860.660.362.559.859.449.645.240.631.621.819.421.120.921.021.222.521.021.418.318.718.017.817.417.821.221.322.223.123.40.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value116116116116116949592525252528.1898.1318.0797.7147.7147.7397.6426.9696.6926.25326232323232323232323232424242424242423232323232322
Percentage of StockholdersEquity12.310.39.29.88.88.18.38.78.79.19.310.2-1.8-1.8-2.0-2.1-2.3-2.5-2.7-2.6-3.0-3.0-12.1-13.920.73.63.02.72.52.52.52.52.42.32.72.62.42.32.32.32.22.22.22.22.22.22.2
Percentage of Assets2.42.52.52.62.62.02.02.02.32.42.42.50.00.90.90.80.90.90.90.80.80.62.42.01.61.11.01.01.01.01.11.11.01.10.90.90.90.90.90.91.11.11.21.21.30.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-312007-12-31
Value-267.315-83.25755-22.3411081681389799776413-1019.993-1003.128-969.125-927.239-884.943-860.207-838.765-815.834-760.901-732.425-737.277-680.7-392.157152287366430438442447490520397424494520531524565564560557577613361
Percentage of StockholdersEquity-28.2-7.44.4-1.98.214.412.19.116.413.311.32.7222.5226.7236.4251.1269.4281.8293.9300.7345.8353.4334.8397.5-340.123.236.442.145.846.446.847.049.550.644.045.548.950.051.750.553.252.451.952.254.257.834.8
Percentage of Assets-5.6-1.81.2-0.52.43.63.02.14.33.52.90.70.0-108.9-106.4-99.7-98.4-95.4-96.9-91.7-85.9-69.9-67.9-56.9-25.66.911.616.118.519.119.620.921.623.015.116.518.619.619.619.925.826.027.228.431.10.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value116116116116116949592525252528.1318.0797.7147.7147.7397.6426.9696.6926.2532623232323232323232323242424242424242323232323
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.52.52.62.62.02.02.02.32.42.42.50.90.90.80.90.90.90.80.80.62.42.01.61.11.01.01.01.01.11.11.01.10.90.90.90.90.90.91.11.11.21.21.3

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value10981097109510931092910909879452
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.123.223.724.324.119.619.519.320.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-267.315-83.25755-22.3411081681389799776413-1003.128-969.125-927.239-884.943-860.207-838.765-815.834-760.901-732.425-737.277-680.7-392.157152287366430438442447490520397424494520531524565564560557577
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-5.6-1.81.2-0.52.43.63.02.14.33.52.90.7-108.9-106.4-99.7-98.4-95.4-96.9-91.7-85.9-69.9-67.9-56.9-25.66.911.616.118.519.119.620.921.623.015.116.518.619.619.619.925.826.027.228.431.1

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1921931851231151501681099874983.60972123109955597109736838.71813367996650625074124
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax56.056.867.669.664.666.558.248.976.758.964.35.163.985.370.467.552.687.49.9102.50.00.07.9120.50.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-173.017-165.551-178.853-98.471-90.384-143.49-177.937-823.6-80.808-88.494-111.588-50.046-132.425-140.011-124.891-237.46-172.169-117.704704-101.66-119.601-99.559-18.137-146.423-511.538-153.659-162.49-124.399-45.319-148.285-151.423-95.446
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-50.3-48.6-65.1-55.3-50.3-63.5-61.5-367.0-63.1-69.7-72.7-71.4-117.6-96.6-80.2-167.3-162.6-105.5653.3-107.00.00.0-16.4-132.50.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-77.00219-4.889-8.72-29.52-9.634-25.205720-0.08194.308-815.97561817140-108.934-15.23-458.6576.68184149.1748.533448559475-19.72559-2.6112.435
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-22.45.7-1.8-4.9-16.4-4.3-8.7320.9-0.115.72.8-1163.649.813.111.299.0-102.9-13.6-425.17.00.00.08.37.70.00.00.00.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-57.708472.00416-3.932-3.005-34.7116.496176.131-8.587-862.407
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-16.813.90.79.4-2.2-1.3-12.02.913.64.8-5.6-1229.8

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-71.131-30.15-46.237-11.536113.7757.0784.3523.883-0.1460.572-0.0870.4960.3593.418-0.8320.0734.446-9.131-31.333-73.094-41.691-26.164-0.4171.230.674-19.499-12.554-11.993-12.245-36.041-11.567-7.6568.072-21.2453.9722.1720.449-4.7480.1740.012-0.055
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1211091049910311011180463736171426273032302929373638597990919499948881858584969990797877746050465759
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value337.032443.79-28.875-54.29745-27.67-9.951-10.78316442.172-1.4554.1762.2957.6092.0483.7520.233.956-4.287-4.971-8.152-2.044-15.081-23.088-8.3996.3922-37.065271.03619-10.1499.785-9.796-1.8154.088-1.6731.3325.29912-9.55-3.3324.786
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1921931851231151501681099874983.60972123109955597109736838.71813367996650625074124
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax56.056.867.669.664.666.558.248.976.758.964.35.163.985.370.467.552.687.49.9102.50.00.07.9120.50.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-179.695-134.12581-126.492-49.87642556.79121135013-16.865-34.003-41.886-42.296-24.736-21.442-22.931-54.933-28.4764.852-56.577-288.543-544.996-135.068-78.502-58.271-1.9031.8981.165-37.498-24.034129-27.144-78.151-25.988-10.3046.859-41.1341.3093.9492.404-20.609-4.7-1.6197.342
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-52.3-39.429.8-71.1-27.818.619.13.016.710.732.819.7-51.8-55.30.00.00.0-34.9-42.60.00.00.0-153.30.0-888.2-174.7-118.0-51.7-1.31.20.8-35.4-21.5120.2-28.60.00.0-9.36.20.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-179.695-134.125-126.492-49.876426.79121135013-16.865-34.003-41.886-42.296-24.736-21.442-22.931-54.933-28.4764.852-56.577-288.543-544.996-135.068-78.502-58.271-1.9031.8981.165-37.498-24.034129-27.144-70.627-25.988-10.3046.859-41.1341.3093.9492.404
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.090.4100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-52.3-39.4-71.1-27.818.63.016.710.732.819.7-51.8-55.30.00.00.0-34.9-42.60.00.00.0-153.30.0-888.2-174.7-118.0-51.7-1.31.20.8-35.4-21.5120.2-28.60.00.0-9.36.20.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-179.695-134.12581-126.492-49.87642556.79121135013
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-52.3-39.429.8-71.1-27.818.619.13.016.710.732.819.7

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.7991.691.731.7521.5521.431.6611.0880.6230.6480.6650.3291.5081.6011.4681.641.551.2651.0891.0781.1631.332.0882.0792.091.8922.8552.8452.7342.2633.2243.1213.2223.2183.5393.3293.3253.5354.0743.9463.853.1624.4474.3884.3094.233
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation us-gaap:IncomeStatementLocation

us-gaap:GeneralAndAdministrativeExpense


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-30
Value1.81.71.81.81.61.41.61.10.60.60.70.30.81.51.61.41.71.51.31.11.11.21.32.02.12.11.92.92.82.72.33.23.13.23.23.3
Percentage of ShareBasedCompensation100.1100.6104.0102.7103.197.996.3101.196.392.6105.391.20.099.599.995.4103.796.8102.8101.0102.0103.297.795.8101.0100.5100.4101.698.498.8101.699.399.399.399.499.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-173.017-165.551-178.853-98.471-90.384-143.49-177.937-823.6-80.808-88.494-111.588-50.046-132.425-140.011-124.891-237.46-172.169-117.704704-101.66-119.601-99.559-18.137-146.423-511.538-153.659-162.49-124.399-45.319-148.285-151.423-95.446
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-50.3-48.6-65.1-55.3-50.3-63.5-61.5-367.0-63.1-69.7-72.7-71.4-117.6-96.6-80.2-167.3-162.6-105.5653.3-107.00.00.0-16.4-132.50.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1731651779890143178130829411059444647464738167.4881914313556141132140124237171117706211912016418451515717415813014816395
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-77.00219-4.889-8.72-29.52-9.634-25.205720-0.08194.308-815.97561817140-108.934-15.23-458.6576.68184149.1748.533448559475-19.72559-2.6112.435
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-22.45.7-1.8-4.9-16.4-4.3-8.7320.9-0.115.72.8-1163.649.813.111.299.0-102.9-13.6-425.17.00.00.08.37.70.00.00.00.00.00.00.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-03-042021-03-312018-09-302016-09-302015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302012-12-312012-09-302011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value126012601291-0.0094.84820.00.02970.00.0250.00.00.0287650.0
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.00.00.0100.00.00.0100.00.00.00.0100.0100.00.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:DebtInstrument

crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix


Repayments
Period End2021-06-292021-03-042021-03-31
Value978777777
Percentage of RepaymentsOfLongTermDebt0.061.761.7

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:BusinessAcquisition, us-gaap:StatementClassOfStock

us-gaap:DebtInstrumentInterestRateStatedPercentage

crk:CoveyParkEnergyLLC, crk:ConvertibleSeriesAPreferredStock


Debt
Period End2020-12-312019-12-312019-09-30
Value7.50.0750.075
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations crk:CoveyParkEnergyLLC crk:ConvertibleSeriesAPreferredStock0.00.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value27.518.3-10.726.70.1870.213-0.0440.3620.2490.2380.0070.222-0.0370.004-0.0140.1520.003-0.025-0.019-0.0060.0290.018-0.086-0.0310.0530.350.347-0.2540.2050.3980.3710.0010.3440.3580.3330.0420.3080.430.538-0.1610.7260.3950.2020.2690.0430.013
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312015-12-312014-12-31
Value2002111.965154
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312015-12-312014-12-31
Value1181103.475107
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-31
Value1516
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0

crk:DerivativeCashReceivedPaidOnHedge

crk:DerivativeCashReceivedPaidOnHedge


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value-19.136-8.677345345
Percentage of DerivativeCashReceivedPaidOnHedge100.0100.0100.0100.0100.0

crk:ExplorationExpenseIncludingUnprovedImpairmentsAndExploratoryDryHoleCosts

crk:ExplorationExpenseIncludingUnprovedImpairmentsAndExploratoryDryHoleCosts


Exploration
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.00.00.00.0270.00.2410.0760.07.7530.3855.0423427.95411182.9959.7542.593581.4070.0371.3530.0820.4470.0829.5370.0991.238
Percentage of ExplorationExpenseIncludingUnprovedImpairmentsAndExploratoryDryHoleCosts0.00.00.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

crk:GasGatheringAndTransportationCost

crk:GasGatheringAndTransportationCost


Gas
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-30
Value3129292226282923107.437.0613.453.1094.3983.545
Percentage of GasGatheringAndTransportationCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

crk:LeaseOperatingExpenses

crk:LeaseOperatingExpenses


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-30
Value26242325302828291414137.0163.4187.9489.433
Percentage of LeaseOperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

crk:NetIncomeLossAvailableToCommonStockholdersBasicAdjusted

crk:NetIncomeLossAvailableToCommonStockholdersBasicAdjusted


Net
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-138.44-130.89-60.00229-1.337211313
Percentage of NetIncomeLossAvailableToCommonStockholdersBasicAdjusted100.0100.0100.0100.0100.0100.0100.0100.0

crk:NoncashExplorationExpenseIncludingUnprovedImpairmentsAndExploratoryDryHoleCosts

crk:NoncashExplorationExpenseIncludingUnprovedImpairmentsAndExploratoryDryHoleCosts


Noncash
Period End2020-09-302020-06-302020-03-31
Value0027000.0
Percentage of NoncashExplorationExpenseIncludingUnprovedImpairmentsAndExploratoryDryHoleCosts0.00.0100.0

crk:NoncashOrPartNoncashAcquisitionWorkingCapital

crk:NoncashOrPartNoncashAcquisitionWorkingCapital


Noncash
Period End2020-12-312019-12-31
Value0.0-0.259
Percentage of NoncashOrPartNoncashAcquisitionWorkingCapital0.0100.0

crk:NoncashOrPartNoncashIncreaseDecreaseInAccruedCapitalExpenditure

crk:NoncashOrPartNoncashIncreaseDecreaseInAccruedCapitalExpenditure


Noncash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1.0951.88-34.005-12.3071513-22.645421.7462.463
Percentage of NoncashOrPartNoncashIncreaseDecreaseInAccruedCapitalExpenditure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

crk:PreferredStockDividendsAndAccretion

crk:PreferredStockDividendsAndAccretion


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value4.3634.3154.44.3981012148.128
Percentage of PreferredStockDividendsAndAccretion100.0100.0100.0100.0100.0100.0100.0100.0

crk:ProductionAndSeveranceTaxesOperatingExpense

crk:ProductionAndSeveranceTaxesOperatingExpense


Production
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value109.6529.1999.7986.4455.567106.9665.8275.9397.1044.0510.7071.1121.841.6431.491.1431.0970.8641.5561.3271.1861.3352.173.8072.9745.366.3696.4675.6014.3524.1683.8832.1213.1483.8563.383.6371.440.1411.3630.7260.3513.062
Percentage of ProductionAndSeveranceTaxesOperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

crk:RetirementOfDebtInExchangeForCommonStock

crk:RetirementOfDebtInExchangeForCommonStock


Retirement
Period End2020-12-312020-09-30
Value08302000.0
Percentage of RetirementOfDebtInExchangeForCommonStock0.0100.0

crk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedWeightedAverageNumber

crk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedWeightedAverageNumber


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1091000.01035000.0-36000.01285000.01184000.01085000.0146000.0758000.0441000.0414000.014000.0396000.0813000.0857000.0834000.00666000.0659000.0503000.04000.0355000.0350000.01571000.036000.01576000.01545000.01166000.06000.01210000.01222000.01113000.0-8000.01520000.01563000.01573000.09000.01717000.01732000.01750000.018000.01635000.01644000.01717000.018000.01695000.01698000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionNonvestedWeightedAverageNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

crk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnrecognizedCompensationCost us-gaap:AwardType

crk:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnrecognizedCompensationCost

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-31
Value900000.04100000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsUnrecognizedCompensationCost100.0100.0

crk:TemporaryEquityAggregateCommonStockConversionShares us-gaap:StatementScenario, us-gaap:StatementClassOfStock

crk:TemporaryEquityAggregateCommonStockConversionShares

srt:ScenarioForecast, crk:SeriesAAndBConvertiblePreferredStock


Temporary
Period End2020-07-16
Value96
Percentage of TemporaryEquityAggregateCommonStockConversionShares100.0

crk:TemporaryEquityDividendsOnTemporaryEquityValue

crk:TemporaryEquityDividendsOnTemporaryEquityValue


Temporary
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value4.3634.3154.3987.219.5728.128
Percentage of TemporaryEquityDividendsOnTemporaryEquityValue100.0100.0100.0100.0100.0100.0

crk:TemporaryEquityDividendsOnTemporaryEquityValue us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Temporary
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value4.3634.3154.3987.219.5728.128
Percentage of TemporaryEquityDividendsOnTemporaryEquityValue100.0100.0100.0100.0100.0100.0

crk:WeightedAverageNumberOfSharesConvertiblePreferredStock

crk:WeightedAverageNumberOfSharesConvertiblePreferredStock


Weighted
Period End2021-06-302021-03-312020-06-302020-03-31
Value430.04375720.09625
Percentage of WeightedAverageNumberOfSharesConvertiblePreferredStock100.0100.0100.0100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation


Adjustments
Period End2021-06-302020-09-302020-03-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value198000.0677000.015000.0167000.004695000.04000.0365000.0041000.00271000.0001000.0312000.0001052000.0-526000.0-4698000.0000
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.00.0100.0100.0100.00.0100.00.0100.00.00.0100.0100.00.00.0100.0100.0100.00.00.00.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302020-09-302020-03-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value182000.0619000.014000.0151000.004423000.04000.0339000.0038000.00258000.01000.0085000.0207000.000974000.0-487000.0-4568000.0000
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation91.991.493.390.40.094.2100.092.90.092.70.095.20.00.08500.066.30.00.092.692.697.20.00.00.0

us-gaap:CommonStock


Adjustments
Period End2021-06-302020-09-302020-03-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312013-09-30
Value16000.058000.01000.016000.00272000.0026000.003000.0013000.0-1000.00-84000.0105000.00078000.0-39000.0-130000.0000
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation8.18.66.79.60.05.80.07.10.07.30.04.80.00.0-8400.033.70.00.07.47.42.80.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-30
Value0.1260.030.00610
Percentage of AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-30
Value0.1260.030.00610
Percentage of AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value5.0868.4899.8079.5057.5277.1997.0686.0091.6231.5741.5820.8221211109.9149.5655.435113.881.2521.2811.1921.3881.5031.0610.9570.9571.021.1631.2721.5841.6311.5871.5881.5861.1590.9440.9490.9480.9381.4650.6020.6080.6240.602
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value9.219.339.339.339.589.6
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfNetIncomePerOutstandingUnitAmount100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationAccretionExpense

us-gaap:AssetRetirementObligationAccretionExpense


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value305000.0297000.0305000.0299000.0294000.0287000.0199000.0176000.097000.096000.088000.045000.0140000.0140000.0165000.0214000.0211000.0220000.0222000.0220000.0222000.0274000.073000.0199000.0203000.0198000.0220000.0213000.0206000.0196000.0230000.0222000.0222000.0272000.0191000.0187000.0178000.0172000.0100000.096000.094000.092000.0101000.099000.0
Percentage of AssetRetirementObligationAccretionExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationLiabilitiesIncurred

us-gaap:AssetRetirementObligationLiabilitiesIncurred


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value534000.0328000.0282000.0162000.0103000.0186000.0260000.0100000.0116000.040000.040000.010000.02000.02000.02000.01000.03000.01000.01000.001000.01000.01000.047000.049000.0213000.0435000.0317000.0358000.0370000.0484000.0286000.0-16000.0329000.0682000.0211000.0528000.0416000.05967000.098000.0119000.072000.0744000.059000.0
Percentage of AssetRetirementObligationLiabilitiesIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetRetirementObligationLiabilitiesSettled

us-gaap:AssetRetirementObligationLiabilitiesSettled


Asset
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value053000.016000.011000.017000.011000.0029000.09000.060000.0-279000.0320000.024000.012000.0-808000.040000.0842000.0335000.014000.075000.077000.042000.03000.021000.0160000.044000.051000.01049000.07000.091000.0-60000.018000.01146000.0109000.0
Percentage of AssetRetirementObligationLiabilitiesSettled0.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CurrentStateAndLocalTaxExpenseBenefit

us-gaap:CurrentStateAndLocalTaxExpenseBenefit


Current
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3001000.0136000.0-370000.067000.088000.061000.0-201000.072000.024000.0-118000.025000.057000.0-22000.024000.010000.021000.018000.021000.076000.028000.07000.015000.014000.0
Percentage of CurrentStateAndLocalTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFederalIncomeTaxExpenseBenefit

us-gaap:DeferredFederalIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-30
Value-58.044-34.91925-35.645-13.5211133.1846.8343.942123.8630.9360.451
Percentage of DeferredFederalIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredStateAndLocalIncomeTaxExpenseBenefit

us-gaap:DeferredStateAndLocalIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-13134000.04816000.011712000.0-10545000.01987000.0-173000.0-770000.0591000.0244000.0410000.03785000.020000.0-309000.0-597000.0-454000.0238000.0-87000.0496000.0359000.03418000.0-832000.073000.04446000.0
Percentage of DeferredStateAndLocalIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure

crk:BasisSwapContracts


Derivative
Period End2021-06-302021-03-31
Value-3.6421
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure100.0100.0

crk:NaturalGasContract


Derivative
Period End2021-06-302021-03-312020-12-31
Value-2.7887371827.091562
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure76.6833.20.0

crk:NaturalGasContractTwo


Derivative
Period End2021-06-302021-03-312020-12-31
Value59129-1.42
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-1624.5587.80.0

crk:NaturalGasSwaptionsCallContracts


Derivative
Period End2021-06-302021-03-31
Value0.043
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-0.0199.5

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

crk:NaturalGasCollarContract, us-gaap:SubsequentEvent


Derivative
Period End2021-08-04
Value6.35
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0

crk:NaturalGasContract, us-gaap:SubsequentEvent


Derivative
Period End2021-05-052021-02-17
Value147.3
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.00.0

crk:NaturalGasContractTwo, us-gaap:SubsequentEvent


Derivative
Period End2021-02-172020-11-05
Value320.02
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.00.0

crk:NaturalGasSwapContract, us-gaap:SubsequentEvent


Derivative
Period End2021-08-04
Value2.75
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0

crk:OilCollarContracts, us-gaap:SubsequentEvent


Derivative
Period End2021-02-17
Value0.3495
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType, us-gaap:TradingActivityByType

crk:NaturalGasSwaptionsCallContracts, us-gaap:SubsequentEvent, crk:SwaptionContractsOctoberTwentyTwenty


Derivative
Period End2020-11-05
Value47
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0

us-gaap:DerivativeNonmonetaryNotionalAmountEnergyMeasure us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType

crk:BasisSwapContracts, crk:SwapContractsForRemainderOfFiscalYear


Derivative
Period End2021-06-302021-03-31
Value-3.6411
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure100.050.1

crk:BasisSwapContracts, crk:SwapContractsForYearTwo


Derivative
Period End2021-06-302021-03-31
Value0.010
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-0.049.9

crk:NaturalGasContract, crk:SwapContractsForRemainderOfFiscalYear


Derivative
Period End2021-06-302021-03-31
Value-53.888737159
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure1480.5725.4

crk:NaturalGasContract, crk:SwapContractsForYearThree


Derivative
Period End2020-12-31
Value0.0
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0

crk:NaturalGasContract, crk:SwapContractsForYearTwo


Derivative
Period End2021-06-302021-03-312020-12-31
Value512354
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-1403.8107.70.0

crk:NaturalGasContract, crk:SwaptionSwapContractsTwentyTwentyOne


Derivative
Period End2021-06-302021-03-312020-12-31
Value-10.923325
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure300.0150.30.0

crk:NaturalGasContractTwo, crk:CollarContractForRemainderOfFiscalYear


Derivative
Period End2021-06-302021-03-31
Value-29.42103
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure808.2472.1

crk:NaturalGasContractTwo, crk:CollarContractsForYearTwo


Derivative
Period End2021-06-302021-03-31
Value8425
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-2309.1115.7

crk:NaturalGasSwaptionsCallContracts, crk:SwapContractsForYearTwo


Derivative
Period End2021-06-302021-03-31
Value0.043
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-0.0199.5

crk:NaturalGasSwaptionsCallContracts, crk:SwaptionContractsMarchTwentyTwentyOne


Derivative
Period End2020-12-31
Value0.0
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0

crk:NaturalGasSwaptionsCallContracts, crk:SwaptionContractsMarchTwoThousandTwentyOne


Derivative
Period End2020-12-31
Value0.0
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure0.0

crk:NaturalGasSwaptionsCallContracts, crk:SwaptionContractsNovemberTwoThousandTwentyOne


Derivative
Period End2021-06-302021-03-312020-12-31
Value0.07.30.0
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-0.033.30.0

crk:NaturalGasSwaptionsCallContracts, crk:SwaptionContractsOctoberTwoThousandTwentyOne


Derivative
Period End2021-06-302021-03-312020-12-31
Value0.0360.0
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-0.0166.30.0

crk:NaturalGasSwaptionsCallContracts, crk:SwaptionContractsTwoThousandTwentyTwo


Derivative
Period End2021-06-302021-03-312020-12-31
Value0.0430.0
Percentage of DerivativeNonmonetaryNotionalAmountEnergyMeasure-0.0199.50.0

us-gaap:DerivativeNonmonetaryNotionalAmountVolume us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNonmonetaryNotionalAmountVolume

crk:CrudeOilContract


Derivative
Period End2021-06-302021-03-31
Value-136500.0412500.0
Percentage of DerivativeNonmonetaryNotionalAmountVolume100.0100.0

us-gaap:DerivativeNonmonetaryNotionalAmountVolume us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType

crk:CrudeOilContract, crk:CollarContractForRemainderOfFiscalYear


Derivative
Period End2021-06-302021-03-31
Value-136500.0412500.0
Percentage of DerivativeNonmonetaryNotionalAmountVolume100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value10.90.50.51.5-0.008-0.005-0.0270.0450.0240.015-0.005-0.006-0.211-0.241-0.2450.074-0.378-0.421-0.387-0.068-0.45-0.221-0.454-0.025-0.317-0.032
Percentage of EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate


Effective
Period End2021-06-30
Value-8.8
Percentage of EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate100.0

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.3-0.2-1.0-1.00.0080.005-0.0080.0120.0120.0060.001-0.002-0.007-0.004-0.010-0.007-0.004-0.0240.0040-0.001-0.002-0.192-0.1510.0420.0170.002-0.0060.006-0.0320.036-0.0280.0470.131-0.1830.4190.043-0.157-0.055-0.266-0.357
Percentage of EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments


Effective
Period End2020-12-312020-09-302020-06-302019-09-302019-06-302018-08-132017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.20.0840.0020.0270.005-0.074-0.0240.013-0.004-0.0240.0010.007-0.003-0.001-0.001-0.063-0.0490.010.00400.003-0.001-0.0030.002-0.0020.0040.01-0.0140.0240.0030.002-0.002-0.01-0.007
Percentage of EffectiveIncomeTaxRateReconciliationOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes

us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value4.1-3.0-10.45.2-0.0250.003-0.018-0.0020.0070.0270.020.0450.0390.031-0.0340.0380.050.0420.0690.124-0.1180.021-0.0070.020.0020.0190.055-0.004-0.001-0.0030.0030.0180.004-0.0120.0290.0470.036-0.067-0.0010.007-0.076-0.031-0.005
Percentage of EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings


Fair
Period End2021-06-302021-03-312020-12-312020-09-30
Value-39.9749.71243-38.904
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements


Fair
Period End2021-06-302021-03-312020-12-312020-09-30
Value-3.483-1.919-64.39510
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements100.0100.0100.0100.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3


Fair
Period End2021-06-302021-03-31
Value0-6418000.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel30.0100.0

us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:GainLossOnDerivativeInstrumentsNetPretax


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302017-06-30
Value-223.958-21.74981-121.579-12.29861192414-7.65712-2.015-0.083-1.6385.295
Percentage of GainLossOnDerivativeInstrumentsNetPretax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDerivativeInstrumentsNetPretax us-gaap:TradingActivityByType

crk:InterestRateDerivatives


Gain
Period End2021-06-302021-03-312020-09-302020-06-30
Value-0.1240.6720.116-2.752
Percentage of GainLossOnDerivativeInstrumentsNetPretax0.1-3.1-0.122.4

crk:NaturalGasPriceDerivatives


Gain
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value-219.845-18.877-120.706-5.144222
Percentage of GainLossOnDerivativeInstrumentsNetPretax98.286.899.341.869.491.2

crk:OilPriceDerivatives


Gain
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value-3.989-3.544-0.989-4.406182.194
Percentage of GainLossOnDerivativeInstrumentsNetPretax1.816.30.835.830.68.8

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:GainLossOnDispositionOfAssets1


Gain
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value9000.070000.01000.016000.00
Percentage of GainLossOnDispositionOfAssets1100.0100.0100.0100.00.0

us-gaap:GainLossOnSaleOfCommodityContracts

us-gaap:GainLossOnSaleOfCommodityContracts


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-223.958-21.74981-121.579-12.29861192414-7.65712-2.015-1.6382.6022.1681.435.2957.86-6.030.00.0180.6560.9711.0780.6271012-9.85-4.946-10.029-3.562.8812.32163.2932.719-1.354
Percentage of GainLossOnSaleOfCommodityContracts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value28-11.0477723-31.388-56.30622-22.53423-8.428301141-16.113505.10535-11.02525-28.57912-21.4444.045-13.19-53.89716-30.362148.91420-45.25260-23.06434-36.86623-58.75363-8.3931.697-1.5720.73631-6.851113
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherCurrentAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-0.75-4.7781.272-11.094-1.0253.828-2.686-5.545-0.015-1.577
Percentage of IncreaseDecreaseInOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-31
Value8.284127.3827.9758.20812-18.443199.142
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost us-gaap:IncomeStatementLocation

crk:LeaseOperatingExpense


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-31
Value0.190.2320.2370.2290.2120.1370.1050.0990.091
Percentage of OperatingLeaseCost2.31.93.22.92.61.1-0.60.51.0

crk:ShortTermDrillingRigCostsIncludedInProvedOilAndGasProperties


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-31
Value7.659116.7297.3247.5812-18.96198.64
Percentage of OperatingLeaseCost92.594.591.291.892.395.7102.897.494.5

us-gaap:GeneralAndAdministrativeExpense


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-31
Value0.4350.4290.4160.4220.4160.4110.4120.4110.411
Percentage of OperatingLeaseCost5.33.55.65.35.13.2-2.22.14.5

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value625000.0661000.0700000.0700000.0600000.0500000.0500000.0513000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentOfFinancingAndStockIssuanceCosts

us-gaap:PaymentOfFinancingAndStockIssuanceCosts


Payment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302016-12-312016-09-302015-12-312015-09-30
Value15200.4895.145180.0470.4487.9990.080.090.0636.2881.189.8350.00.086
Percentage of PaymentOfFinancingAndStockIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:PaymentsForRepurchaseOfPreferredStockAndPreferenceStock

us-gaap:PaymentsForRepurchaseOfPreferredStockAndPreferenceStock


Payments
Period End2020-12-31
Value0.0
Percentage of PaymentsForRepurchaseOfPreferredStockAndPreferenceStock0.0

us-gaap:PaymentsOfDebtExtinguishmentCosts us-gaap:DebtInstrument

us-gaap:PaymentsOfDebtExtinguishmentCosts

crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix


Payments
Period End2021-06-29
Value74
Percentage of PaymentsOfDebtExtinguishmentCosts100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-03-042021-03-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1.11.10.0150.00.0860.145150.00.0072.4670.052.7280.0010.0040.0110.0080.1666.4730.0621.9010.00.06.577
Percentage of PaymentsOfDebtIssuanceCosts100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value4.3634.3154.44.3987.219.5729.704
Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0677000.0015000.053000.004695000.04000.0365000.0041000.00271000.0001000.0312000.0000526000.00002349000.000114000.01566000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation0.0100.00.0100.0100.00.0100.0100.0100.00.0100.00.0100.00.00.0100.0100.00.00.00.0100.00.00.00.0100.00.00.0100.0100.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt


Proceeds
Period End2021-06-302021-03-312020-09-30
Value9651257301
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt us-gaap:DebtInstrument

crk:SeniorNotesFivePointEightSevenFivePercentDueTwoThousandThirty


Proceeds
Period End2021-06-28
Value949
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0

crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix


Proceeds
Period End2020-08-192020-06-232018-08-03
Value296441815
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.00.00.0

crk:SeniorNotesSixPointSevenFivePercentDueTwoThousandTwentyNine


Proceeds
Period End2021-03-04
Value1240
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value351450.05545574081527450.0450
Percentage of ProceedsFromLinesOfCredit100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:ProceedsFromSaleOfProductiveAssets

us-gaap:ProceedsFromSaleOfProductiveAssets


Proceeds
Period End2021-06-302021-03-31
Value11000.0200000.0
Percentage of ProceedsFromSaleOfProductiveAssets100.0100.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value110950.035549557552027250.01291
Percentage of RepaymentsOfLinesOfCredit100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:RepaymentsOfSeniorDebt

us-gaap:RepaymentsOfSeniorDebt


Repayments
Period End2021-06-302021-03-31
Value9461263
Percentage of RepaymentsOfSeniorDebt100.0100.0

us-gaap:RevenueFromRelatedParties us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RevenueFromRelatedParties

crk:PartnershipCostsToDrillAndOperateWellsAndOverheadFees, us-gaap:MajorityShareholder


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value0.3990.4122.40.0550.32412
Percentage of RevenueFromRelatedParties100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-01-31
Value4700000.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-08
Value8.56
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0

us-gaap:RestrictedStock


Share
Period End2021-06-082019-12-312019-09-302018-12-312018-09-302018-08-13
Value6.0505.5108.78.73
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue70.70.00.00.00.00.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:CommonStock


Shares
Period End2021-06-302020-09-302020-03-312019-09-302018-12-312018-09-302018-03-31
Value33000.0113000.02000.031000.00547000.053000.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation100.0100.0100.0100.00.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-03-31
Value472000.0-4000.0-46000.0507000.0-24000.0780000.074000.0-3000.0-8000.0423000.0100000.0523000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1.7991.691.7521.5521.431.0880.6230.6480.6650.3290.8031.5081.6011.4681.641.551.2651.0891.0781.1631.332.0882.0792.091.892
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1.5641.691.7741.2981.4420.6970.5860.650.6690.1180.7531.5081.341.4681.6631.4991.0681.0891.0781.5590.8182.0912.082.0141.494
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation86.9100.0101.383.6100.864.194.1100.3100.635.993.8100.083.7100.0101.496.784.4100.0100.0134.061.5100.1100.096.479.0

us-gaap:CommonStock


Stock
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.235-0.0220.254-0.0120.3910.037-0.002-0.0040.2110.050.00.2610.0-0.0230.0510.1970.00.0-0.3960.512-0.003-0.0010.0760.398
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation13.1-1.316.4-0.835.95.9-0.3-0.664.16.20.016.30.0-1.43.315.60.00.0-34.038.5-0.1-0.03.621.0

crk:AccruedAdValoremTaxesPayable

crk:AccruedAdValoremTaxesPayable


Accrued
Period End2021-06-302021-03-31
Value6000000.03000000.0
Percentage of AccruedAdValoremTaxesPayable100.0100.0

crk:AccruedCapitalExpenditures

crk:AccruedCapitalExpenditures


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value252624251342
Percentage of AccruedCapitalExpenditures100.0100.0100.0100.0100.0100.0

crk:AccruedDrillingCosts

crk:AccruedDrillingCosts


Accrued
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value24294264221517186.0286.1935.8744.8348.3137.3937.4980.8762.0055.3064.4927.50210261922243412159.897141635422919
Percentage of AccruedDrillingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

crk:AccruedLeaseOperatingExpenses

crk:AccruedLeaseOperatingExpenses


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.3542.6133.466118.6956.24.99133.312.252.133.311
Percentage of AccruedLeaseOperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

crk:AccruedTransactionCosts

crk:AccruedTransactionCosts


Accrued
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.4621.0883.3646.6910
Percentage of AccruedTransactionCosts100.0100.0100.0100.0100.0

crk:AccruedTransportationCosts

crk:AccruedTransportationCosts


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value24232525272626186.7935.294.6325.0222.8822.9843.2693.0052.7852.5772.2272.4662.818
Percentage of AccruedTransportationCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

crk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsProvedOilAndNaturalGasProperties us-gaap:BusinessAcquisition

crk:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsProvedOilAndNaturalGasProperties

crk:CoveyParkEnergyLLC


Business
Period End2020-09-302019-07-16
Value18171818
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsProvedOilAndNaturalGasProperties100.0100.0

crk:BusinessCombinationRecognizedIdentifiableConsiderationAndLiabilitiesAssumed us-gaap:BusinessAcquisition

crk:BusinessCombinationRecognizedIdentifiableConsiderationAndLiabilitiesAssumed

crk:CoveyParkEnergyLLC


Business
Period End2020-09-302019-07-16
Value22252226
Percentage of BusinessCombinationRecognizedIdentifiableConsiderationAndLiabilitiesAssumed100.0100.0

crk:CapitalizedCostsLeaseHoldCosts

crk:CapitalizedCostsLeaseHoldCosts


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value3010291210104916629821006971899
Percentage of CapitalizedCostsLeaseHoldCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0

crk:CommitmentsForContractedDrillingServices

crk:CommitmentsForContractedDrillingServices


Commitments
Period End2020-12-312020-09-30
Value6000000.05200000.0
Percentage of CommitmentsForContractedDrillingServices100.0100.0

crk:ContractualObligationToBePaidAfterYearTwo

crk:ContractualObligationToBePaidAfterYearTwo


Contractual
Period End2020-12-31
Value24
Percentage of ContractualObligationToBePaidAfterYearTwo100.0

crk:DeferredTaxAssetsInterestExpenseLimitation

crk:DeferredTaxAssetsInterestExpenseLimitation


Deferred
Period End2020-12-312019-12-312018-12-31
Value556245
Percentage of DeferredTaxAssetsInterestExpenseLimitation100.0100.0100.0

crk:DeferredTaxAssetsTaxCreditCarryforwardsInterestExpense us-gaap:IncomeTaxAuthority

crk:DeferredTaxAssetsTaxCreditCarryforwardsInterestExpense

crk:YearsOfExpirationCarryforwardUnlimited


Deferred
Period End2020-12-31
Value262
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsInterestExpense100.0

us-gaap:StateAndLocalJurisdiction


Deferred
Period End2020-12-31
Value264
Percentage of DeferredTaxAssetsTaxCreditCarryforwardsInterestExpense101.1

crk:DeferredTaxLiabilitiesAmortizationOfBondDiscount

crk:DeferredTaxLiabilitiesAmortizationOfBondDiscount


Deferred
Period End2020-12-312019-12-31
Value3037
Percentage of DeferredTaxLiabilitiesAmortizationOfBondDiscount100.0100.0

crk:DerivativeAssetRelatedParty us-gaap:RelatedPartyTransactionsByRelatedParty

crk:DerivativeAssetRelatedParty

us-gaap:MajorityShareholder


Derivative
Period End2021-06-302021-03-31
Value101.9
Percentage of DerivativeAssetRelatedParty100.0100.0

crk:DerivativeAveragePutPrice us-gaap:DerivativeInstrumentRisk

crk:DerivativeAveragePutPrice

crk:NaturaGasThreeWayCollarContracts


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value2.322.322.322.332.36
Percentage of DerivativeAveragePutPrice100.0100.0100.0100.0100.0

crk:DerivativeAveragePutPrice us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType

crk:NaturaGasThreeWayCollarContracts, crk:SwapContractsForFourthQuarterOfYearOne


Derivative
Period End2020-09-302019-09-30
Value2.322.41
Percentage of DerivativeAveragePutPrice100.0102.1

crk:EstimatedNetOperatingLossTaxCreditCarryforwardsToExpireUnusedAmount us-gaap:IncomeTaxAuthority

crk:EstimatedNetOperatingLossTaxCreditCarryforwardsToExpireUnusedAmount

us-gaap:DomesticCountry


Estimated
Period End2020-12-312019-12-312018-12-31
Value844840843
Percentage of EstimatedNetOperatingLossTaxCreditCarryforwardsToExpireUnusedAmount100.0100.0100.0

us-gaap:StateAndLocalJurisdiction


Estimated
Period End2020-12-312019-12-312018-12-31
Value140014001300
Percentage of EstimatedNetOperatingLossTaxCreditCarryforwardsToExpireUnusedAmount165.8166.6154.2

crk:ExpectedFuturePaymentsForContractedDrillingServices

crk:ExpectedFuturePaymentsForContractedDrillingServices


Expected
Period End2021-06-302021-03-312020-09-30
Value4800000.05900000.05200000.0
Percentage of ExpectedFuturePaymentsForContractedDrillingServices100.0100.0100.0

crk:LongTermDebtPrincipalAmount

crk:LongTermDebtPrincipalAmount


Long
Period End2020-12-312020-09-302019-12-312018-12-312016-12-312015-12-31
Value27695002725130011651270
Percentage of LongTermDebtPrincipalAmount100.0100.0100.0100.0100.0100.0

crk:LongTermDebtPrincipalAmount us-gaap:CreditFacility

us-gaap:LineOfCredit


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302015-12-312014-12-31
Value5005008001250125012654704704504500.0375
Percentage of LongTermDebtPrincipalAmount18.1100.00.00.045.90.00.00.034.60.00.00.0

crk:LongTermDebtPrincipalAmount us-gaap:DebtInstrument

crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix


Long
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-03
Value16501350850850850850850850850850
Percentage of LongTermDebtPrincipalAmount59.60.00.031.20.00.00.065.40.00.0

crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFive


Long
Period End2020-12-312020-06-302020-03-312019-12-312019-09-30
Value619619625625625
Percentage of LongTermDebtPrincipalAmount22.40.00.022.90.0

crk:PerformanceShareUnitsOutstandingWeightedAverageGrantDateFairValue us-gaap:AwardType

crk:PerformanceShareUnitsOutstandingWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Performance
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value9.219.339.339.339.5612.9317.1222.177.0719.8820.92
Percentage of PerformanceShareUnitsOutstandingWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows


Future
Period End2020-12-312019-12-312018-12-31
Value9871130788054
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows100.0100.0100.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts


Future
Period End2020-12-312019-12-312018-12-31
Value259231711800
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts100.0100.0100.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense


Future
Period End2020-12-312019-12-312018-12-31
Value154676622
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense100.0100.0100.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows


Future
Period End2020-12-312019-12-312018-12-31
Value395056683470
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows100.0100.0100.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts


Future
Period End2020-12-312019-12-312018-12-31
Value317335622160
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts100.0100.0100.0

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows


Future
Period End2020-12-312019-12-312018-12-31
Value201527541996
Percentage of FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows100.0100.0100.0

srt:StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves

srt:StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves


Standardized
Period End2020-12-312019-12-312018-12-312018-08-13
Value1935291314731317
Percentage of StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves100.0100.0100.0100.0

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:AccountsPayableRelatedPartiesCurrentAndNoncurrent

crk:ArkomaDrillingIILP


Accounts
Period End2020-12-31
Value2000000.0
Percentage of AccountsPayableRelatedPartiesCurrentAndNoncurrent100.0

us-gaap:AccountsReceivableRelatedParties

us-gaap:AccountsReceivableRelatedParties


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value17126.1552.2029.9342535
Percentage of AccountsReceivableRelatedParties100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableRelatedParties us-gaap:RelatedPartyTransactionsByRelatedParty

crk:ArkomaDrillingIILP


Accounts
Period End2020-12-31
Value6.2
Percentage of AccountsReceivableRelatedParties100.7

us-gaap:MajorityShareholder


Accounts
Period End2021-06-302021-03-312020-09-30
Value17132.2
Percentage of AccountsReceivableRelatedParties99.8100.399.9

us-gaap:AssetRetirementObligationsNoncurrent

us-gaap:AssetRetirementObligationsNoncurrent


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value20191919181818115.4565.2435.1364.7384.6831010101616161516151620151415141615151417161617141413137.1967.0096.826.6746.9756.846.5615.48
Percentage of AssetRetirementObligationsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets

crk:CoveyParkEnergyLLC


Business
Period End2020-09-302019-07-16
Value22252226
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther

crk:CoveyParkEnergyLLC


Business
Period End2020-09-302019-07-16
Value4957000.05511000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther

crk:CoveyParkEnergyLLC


Business
Period End2020-09-302019-07-16
Value109.93
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities

crk:CoveyParkEnergyLLC


Business
Period End2020-09-302019-07-16
Value2123
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

crk:CoveyParkEnergyLLC


Business
Period End2020-09-302019-07-16
Value11571158
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities100.0100.0

us-gaap:CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities

us-gaap:CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value9014852102032300933892298186115881349996
Percentage of CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedCostsOilAndGasProducingActivitiesNet

us-gaap:CapitalizedCostsOilAndGasProducingActivitiesNet


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value407840021663598787102621852053245524951803
Percentage of CapitalizedCostsOilAndGasProducingActivitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedCostsProvedProperties

us-gaap:CapitalizedCostsProvedProperties


Capitalized
Period End2020-12-312019-12-312018-12-31
Value374635911471
Percentage of CapitalizedCostsProvedProperties100.0100.0100.0

us-gaap:CapitalizedCostsUnprovedProperties

us-gaap:CapitalizedCostsUnprovedProperties


Capitalized
Period End2020-12-312019-12-312018-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value33241019184201134263369225
Percentage of CapitalizedCostsUnprovedProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedCostsWellsAndRelatedEquipmentAndFacilities

us-gaap:CapitalizedCostsWellsAndRelatedEquipmentAndFacilities


Capitalized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1636116567121403135334932752810265423141753
Percentage of CapitalizedCostsWellsAndRelatedEquipmentAndFacilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


Cash
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-08-132017-12-312016-12-31
Value3011151853462923318946165
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligationDueAfterFifthYear

us-gaap:ContractualObligationDueAfterFifthYear


Contractual
Period End2020-09-30
Value144
Percentage of ContractualObligationDueAfterFifthYear100.0

us-gaap:ContractualObligationDueInFifthYear

us-gaap:ContractualObligationDueInFifthYear


Contractual
Period End2020-09-30
Value24
Percentage of ContractualObligationDueInFifthYear100.0

us-gaap:ContractualObligationDueInFourthYear

us-gaap:ContractualObligationDueInFourthYear


Contractual
Period End2020-09-30
Value24
Percentage of ContractualObligationDueInFourthYear100.0

us-gaap:ContractualObligationDueInNextTwelveMonths

us-gaap:ContractualObligationDueInNextTwelveMonths


Contractual
Period End2021-06-302020-12-312020-09-30
Value192121
Percentage of ContractualObligationDueInNextTwelveMonths100.0100.0100.0

us-gaap:ContractualObligationDueInSecondYear

us-gaap:ContractualObligationDueInSecondYear


Contractual
Period End2021-06-302020-12-312020-09-30
Value193131
Percentage of ContractualObligationDueInSecondYear100.0100.0100.0

us-gaap:ContractualObligationDueInThirdYear

us-gaap:ContractualObligationDueInThirdYear


Contractual
Period End2021-06-302020-09-30
Value1924
Percentage of ContractualObligationDueInThirdYear100.0100.0

us-gaap:ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear

us-gaap:ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear


Contractual
Period End2020-09-30
Value4100000.0
Percentage of ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:CreditFacility

us-gaap:DebtInstrumentCarryingAmount

us-gaap:LineOfCredit


Debt
Period End2021-06-302021-03-31
Value475550
Percentage of DebtInstrumentCarryingAmount100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:DebtInstrument

crk:SeniorNotesFivePointEightSevenFivePercentDueTwoThousandThirty


Debt
Period End2021-06-30
Value965
Percentage of DebtInstrumentCarryingAmount203.2

crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix


Debt
Period End2021-03-312020-09-30
Value8721650
Percentage of DebtInstrumentCarryingAmount158.70.0

crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFive


Debt
Period End2021-06-302021-03-312020-09-30
Value244244619
Percentage of DebtInstrumentCarryingAmount51.544.40.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument

us-gaap:DebtInstrumentUnamortizedDiscount

crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix


Debt
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2872747829293032
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0100.0100.0100.0100.0100.0100.0

crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFive


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value5255145151157163169174
Percentage of DebtInstrumentUnamortizedDiscount0.0190.9201.8203.5200.9562.6565.2567.3

us-gaap:DebtInstrumentUnamortizedPremium us-gaap:DebtInstrument

us-gaap:DebtInstrumentUnamortizedPremium

crk:SeniorNotesSixPointSevenFivePercentDueTwoThousandTwentyNine


Debt
Period End2021-06-302021-03-31
Value7257000.07443000.0
Percentage of DebtInstrumentUnamortizedPremium100.0100.0

us-gaap:DebtWeightedAverageInterestRate us-gaap:CreditFacility

us-gaap:DebtWeightedAverageInterestRate

us-gaap:LineOfCredit


Debt
Period End2020-12-312019-12-31
Value3.484.69
Percentage of DebtWeightedAverageInterestRate100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value319321260141714
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsDerivativeInstruments


Deferred
Period End2020-12-31
Value10
Percentage of DeferredTaxAssetsDerivativeInstruments100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-31
Value134127
Percentage of DeferredTaxAssetsGross100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value59516528933925512670954736
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5661000.06895000.03711000.03782000.08523000.08201000.07854000.08221000.08319000.08772000.07910000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4061000.03812000.02329000.03489000.04628000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value4604000.04130000.04124000.02331000.04118000.04934000.03001000.02764000.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value283269252119.2039.047259238247253249
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetFairValueGrossLiability us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:TradingActivityByType

us-gaap:DerivativeAssetFairValueGrossLiability

crk:FairValueInputsLevel2AndLevel3, us-gaap:Commodity


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2696149129247.4234.442
Percentage of DerivativeAssetFairValueGrossLiability100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:TradingActivityByType

us-gaap:DerivativeAssets

crk:BasisSwapContracts


Derivative
Period End2020-12-312020-09-30
Value1.01.3
Percentage of DerivativeAssets100.0100.0

us-gaap:DerivativeAssetsCurrent

us-gaap:DerivativeAssetsCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-03-312015-12-312015-09-302015-06-302014-09-302013-12-312013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value104.6278.9138.83551017562142.356152.5161.3183.2035.2291.3251.1041.4461.3140.6273.9090.973.5242.8841110180.459
Percentage of DerivativeAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsCurrent us-gaap:BalanceSheetLocation

crk:DerivativeFinancialInstrumentCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value104.6278.9138.8355101756215
Percentage of DerivativeAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsCurrent us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

crk:DerivativeFinancialInstrumentCurrent, crk:NaturalGasContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value6.4192.6338.9136.40549857560133.1116.0960.00.01.318
Percentage of DerivativeAssetsCurrent59.656.9100.072.589.883.899.896.397.7132.039.60.00.0100.0

crk:DerivativeFinancialInstrumentCurrent, crk:OilPriceDerivatives


Derivative
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value4.3461.9942.4255.633160.1812.2750.325-0.7559.305
Percentage of DerivativeAssetsCurrent40.443.127.510.216.20.23.72.3-32.060.4

us-gaap:DerivativeAssetsCurrent us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:TradingActivityByType

crk:FairValueInputsLevel2AndLevel3, us-gaap:Commodity


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value118.1519.57410601088915
Percentage of DerivativeAssetsCurrent107.7176.2107.4113.4109.1106.7118.4100.0

us-gaap:DerivativeAssetsNoncurrent

us-gaap:DerivativeAssetsNoncurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.833.5240.6611.1855.0456.83513210.869
Percentage of DerivativeAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetsNoncurrent us-gaap:BalanceSheetLocation

crk:DerivativeFinancialInstrumentNonCurrent


Derivative
Period End2021-06-302020-12-312019-09-30
Value0.830.66121
Percentage of DerivativeAssetsNoncurrent100.0100.0100.0

us-gaap:DerivativeAssetsNoncurrent us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

crk:DerivativeFinancialInstrumentNonCurrent, crk:NaturalGasContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.7983.5240.6611.1855.0456.83513210.231
Percentage of DerivativeAssetsNoncurrent96.1100.0100.0100.0100.0100.0100.096.126.6

crk:DerivativeFinancialInstrumentNonCurrent, us-gaap:InterestRateContract


Derivative
Period End2021-06-30
Value0.032
Percentage of DerivativeAssetsNoncurrent3.9

us-gaap:DerivativeAverageCapPrice us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAverageCapPrice

crk:CrudeOilContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value51.6751.6745.056.0663.8964.1364.9265.39
Percentage of DerivativeAverageCapPrice100.0100.0100.0100.0100.0100.0100.0100.0

crk:NaturaGasThreeWayCollarContracts


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value2.992.992.992.993.02
Percentage of DerivativeAverageCapPrice5.34.74.74.64.6

crk:NaturalGasContractTwo


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3.293.062.992.942.892.923.463.48
Percentage of DerivativeAverageCapPrice6.45.96.65.24.54.65.35.3

us-gaap:DerivativeAverageCapPrice us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

crk:CrudeOilContract, us-gaap:SubsequentEvent


Derivative
Period End2020-08-07
Value45.0
Percentage of DerivativeAverageCapPrice0.0

crk:NaturalGasCollarContract, us-gaap:SubsequentEvent


Derivative
Period End2021-08-04
Value5.13
Percentage of DerivativeAverageCapPrice0.0

crk:NaturalGasContract, us-gaap:SubsequentEvent


Derivative
Period End2021-02-16
Value2.7
Percentage of DerivativeAverageCapPrice0.0

crk:NaturalGasContractTwo, us-gaap:SubsequentEvent


Derivative
Period End2021-02-162020-10-012020-08-07
Value3.23.73.0
Percentage of DerivativeAverageCapPrice0.00.00.0

crk:OilCollarContracts, us-gaap:SubsequentEvent


Derivative
Period End2021-02-16
Value54.96
Percentage of DerivativeAverageCapPrice0.0

us-gaap:DerivativeAverageCapPrice us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType

crk:CrudeOilContract, crk:CollarContractForFourthQuarterOfYearOne


Derivative
Period End2020-09-30
Value63.83
Percentage of DerivativeAverageCapPrice113.9

crk:CrudeOilContract, crk:CollarContractOneForYearTwo


Derivative
Period End2020-12-312019-09-302019-06-302019-03-31
Value45.065.3365.6165.62
Percentage of DerivativeAverageCapPrice100.099.90.00.0

crk:CrudeOilContract, crk:CollarContractsForYearTwo


Derivative
Period End2020-09-302018-09-30
Value45.077.98
Percentage of DerivativeAverageCapPrice80.30.0

crk:NaturaGasThreeWayCollarContracts, crk:SwapContractsForFourthQuarterOfYearOne


Derivative
Period End2020-09-302019-09-30
Value2.993.08
Percentage of DerivativeAverageCapPrice5.34.7

crk:NaturalGasContractTwo, crk:CollarContractForFourthQuarterOfYearOne


Derivative
Period End2020-09-30
Value2.95
Percentage of DerivativeAverageCapPrice5.3

crk:NaturalGasContractTwo, crk:CollarContractForRemainderOfFiscalYear


Derivative
Period End2021-06-302021-03-31
Value3.043.02
Percentage of DerivativeAverageCapPrice5.95.8

crk:NaturalGasContractTwo, crk:CollarContractOneForYearThree


Derivative
Period End2020-12-31
Value3.48
Percentage of DerivativeAverageCapPrice7.7

crk:NaturalGasContractTwo, crk:CollarContractOneForYearTwo


Derivative
Period End2020-12-312019-09-30
Value2.973.46
Percentage of DerivativeAverageCapPrice6.65.3

crk:NaturalGasContractTwo, crk:CollarContractsForYearThree


Derivative
Period End2021-06-302020-09-30
Value3.673.36
Percentage of DerivativeAverageCapPrice7.16.0

crk:NaturalGasContractTwo, crk:CollarContractsForYearTwo


Derivative
Period End2021-06-302021-03-312020-09-302020-06-30
Value3.443.242.932.88
Percentage of DerivativeAverageCapPrice6.76.35.24.5

us-gaap:DerivativeAverageFloorPrice us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAverageFloorPrice

crk:CrudeOilContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value41.6741.6740.045.4949.2549.5148.6547.78
Percentage of DerivativeAverageFloorPrice100.0100.0100.0100.0100.0100.0100.0100.0

crk:NaturaGasThreeWayCollarContracts


Derivative
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value2.632.632.632.652.69
Percentage of DerivativeAverageFloorPrice5.85.35.35.45.6

crk:NaturalGasContractTwo


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2.52.482.462.452.452.412.472.44
Percentage of DerivativeAverageFloorPrice6.06.06.25.45.04.95.15.1

us-gaap:DerivativeAverageFloorPrice us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

crk:CrudeOilContract, us-gaap:SubsequentEvent


Derivative
Period End2020-08-07
Value40.0
Percentage of DerivativeAverageFloorPrice0.0

crk:NaturalGasCollarContract, us-gaap:SubsequentEvent


Derivative
Period End2021-08-04
Value2.85
Percentage of DerivativeAverageFloorPrice0.0

crk:NaturalGasContractTwo, us-gaap:SubsequentEvent


Derivative
Period End2021-02-162020-10-012020-08-07
Value2.52.62.5
Percentage of DerivativeAverageFloorPrice0.00.00.0

crk:OilCollarContracts, us-gaap:SubsequentEvent


Derivative
Period End2021-02-16
Value42.39
Percentage of DerivativeAverageFloorPrice0.0

us-gaap:DerivativeAverageFloorPrice us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType

crk:CrudeOilContract, crk:CollarContractForFourthQuarterOfYearOne


Derivative
Period End2020-09-30
Value49.35
Percentage of DerivativeAverageFloorPrice108.5

crk:CrudeOilContract, crk:CollarContractOneForYearTwo


Derivative
Period End2020-12-312019-09-302019-06-302019-03-31
Value40.048.4848.7548.67
Percentage of DerivativeAverageFloorPrice100.0101.50.00.0

crk:CrudeOilContract, crk:CollarContractsForYearTwo


Derivative
Period End2020-09-302018-09-30
Value40.055.0
Percentage of DerivativeAverageFloorPrice87.90.0

crk:NaturaGasThreeWayCollarContracts, crk:SwapContractsForFourthQuarterOfYearOne


Derivative
Period End2020-09-302019-09-30
Value2.632.79
Percentage of DerivativeAverageFloorPrice5.85.8

crk:NaturalGasContractTwo, crk:CollarContractForFourthQuarterOfYearOne


Derivative
Period End2020-09-30
Value2.43
Percentage of DerivativeAverageFloorPrice5.3

crk:NaturalGasContractTwo, crk:CollarContractOneForYearThree


Derivative
Period End2020-12-31
Value2.53
Percentage of DerivativeAverageFloorPrice6.3

crk:NaturalGasContractTwo, crk:CollarContractOneForYearTwo


Derivative
Period End2020-12-312019-09-30
Value2.462.47
Percentage of DerivativeAverageFloorPrice6.25.2

crk:NaturalGasContractTwo, crk:CollarContractsForYearTwo


Derivative
Period End2021-06-302021-03-312020-09-302020-06-30
Value2.522.512.452.45
Percentage of DerivativeAverageFloorPrice6.06.05.45.0

us-gaap:DerivativeAverageForwardPrice us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeAverageForwardPrice

crk:NaturalGasContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value2.622.542.542.572.582.662.812.83
Percentage of DerivativeAverageForwardPrice100.0100.0100.0100.0100.0100.0100.0100.0

crk:NaturalGasSwaptionsCallContracts


Derivative
Period End2021-06-302021-03-312020-09-302020-06-30
Value2.512.512.522.52
Percentage of DerivativeAverageForwardPrice95.898.898.197.7

crk:NaturalGasSwaptionsContracts


Derivative
Period End2020-12-312020-03-312019-12-31
Value2.512.522.52
Percentage of DerivativeAverageForwardPrice98.894.789.7

us-gaap:DerivativeAverageForwardPrice us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

crk:NaturalGasContract, us-gaap:SubsequentEvent


Derivative
Period End2021-05-05
Value2.7
Percentage of DerivativeAverageForwardPrice0.0

crk:NaturalGasSwapContract, us-gaap:SubsequentEvent


Derivative
Period End2021-08-04
Value3.0
Percentage of DerivativeAverageForwardPrice0.0

us-gaap:DerivativeAverageForwardPrice us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType, us-gaap:TradingActivityByType

crk:NaturalGasSwaptionsCallContracts, us-gaap:SubsequentEvent, crk:SwaptionContractsOctoberTwentyTwenty


Derivative
Period End2020-10-01
Value2.53
Percentage of DerivativeAverageForwardPrice0.0

us-gaap:DerivativeAverageForwardPrice us-gaap:DerivativeInstrumentRisk, us-gaap:TradingActivityByType

crk:NaturalGasContract, crk:SwapContractsForFourthQuarterOfYearOne


Derivative
Period End2020-09-302019-09-302018-09-30
Value2.632.853.0
Percentage of DerivativeAverageForwardPrice102.3100.70.0

crk:NaturalGasContract, crk:SwapContractsForYearThree


Derivative
Period End2020-12-312020-09-302020-06-302020-05-112019-12-312019-09-30
Value2.532.532.532.532.812.87
Percentage of DerivativeAverageForwardPrice99.698.498.10.0100.0101.4

crk:NaturalGasContract, crk:SwapContractsForYearTwo


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-30
Value2.752.582.542.552.552.572.872.813.03.03.0
Percentage of DerivativeAverageForwardPrice105.0101.6100.099.298.896.6102.199.30.00.00.0

crk:NaturalGasContract, crk:SwaptionSwapContractsTwentyTwenty


Derivative
Period End2020-09-30
Value2.52
Percentage of DerivativeAverageForwardPrice98.1

crk:NaturalGasContract, crk:SwaptionSwapContractsTwentyTwentyOne


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value2.512.512.512.522.52
Percentage of DerivativeAverageForwardPrice95.898.898.898.197.7

crk:NaturalGasSwaptionsCallContracts, crk:SwapContractsForYearTwo


Derivative
Period End2021-06-302021-03-312020-09-302020-06-30
Value2.512.512.522.52
Percentage of DerivativeAverageForwardPrice95.898.898.197.7

crk:NaturalGasSwaptionsContracts, crk:SwapContractsForYearThree


Derivative
Period End2020-12-31
Value2.51
Percentage of DerivativeAverageForwardPrice98.8

crk:NaturalGasSwaptionsContracts, crk:SwapContractsForYearTwo


Derivative
Period End2020-12-312020-03-312019-12-31
Value2.52.522.53
Percentage of DerivativeAverageForwardPrice98.494.790.0

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:TradingActivityByType

us-gaap:DerivativeFairValueOfDerivativeAsset

crk:FairValueInputsLevel2AndLevel3, us-gaap:Commodity


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value118.1519.57410601088915
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities

us-gaap:DerivativeLiabilities


Derivative
Period End2021-06-302021-03-312020-09-302013-09-302012-03-31
Value1.01.12.50.310
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities us-gaap:TradingActivityByType

crk:InterestRateSwapContracts


Derivative
Period End2020-12-31
Value2.1
Percentage of DerivativeLiabilities0.0

us-gaap:DerivativeLiabilitiesCurrent

us-gaap:DerivativeLiabilitiesCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-09-302018-06-302016-12-312014-06-302014-03-31
Value255604763113.0430.2222.8490.236.038.4922.679
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesCurrent us-gaap:BalanceSheetLocation

crk:DerivativeFinancialInstrumentCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value255604763110.222
Percentage of DerivativeLiabilitiesCurrent100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesCurrent us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

crk:DerivativeFinancialInstrumentCurrent, crk:NaturalGasContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-09-302018-06-30
Value244544562103.0430.2220.8360.23
Percentage of DerivativeLiabilitiesCurrent95.889.596.198.592.2100.0100.029.3100.0

crk:DerivativeFinancialInstrumentCurrent, crk:OilPriceDerivatives


Derivative
Period End2021-06-302021-03-312020-12-312019-12-31
Value9.8285.4510.8310.222
Percentage of DerivativeLiabilitiesCurrent3.99.01.8100.0

crk:DerivativeFinancialInstrumentCurrent, us-gaap:InterestRateContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.9950.9551.0160.9430.916
Percentage of DerivativeLiabilitiesCurrent0.41.62.21.57.8

crk:DerivativeFinancialInstrumentNonCurrent, us-gaap:InterestRateContract


Derivative
Period End2020-12-31
Value1.016
Percentage of DerivativeLiabilitiesCurrent2.2

us-gaap:DerivativeLiabilitiesCurrent us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:TradingActivityByType

crk:FairValueInputsLevel2AndLevel3, us-gaap:Commodity


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2696149129247.4234.442
Percentage of DerivativeLiabilitiesCurrent105.5100.3105.0204.4211.0243.92000.9

us-gaap:DerivativeLiabilitiesNoncurrent

us-gaap:DerivativeLiabilitiesNoncurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value140.1982.36466134.384.22
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent us-gaap:BalanceSheetLocation

crk:DerivativeFinancialInstrumentNonCurrent


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value140.1982.36466134.22
Percentage of DerivativeLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilitiesNoncurrent us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk

crk:DerivativeFinancialInstrumentNonCurrent, crk:NaturalGasContract


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value140.0211.30864114.384.22
Percentage of DerivativeLiabilitiesNoncurrent100.010.655.397.785.5100.0100.0

crk:DerivativeFinancialInstrumentNonCurrent, crk:OilPriceDerivatives


Derivative
Period End2020-12-312020-09-30
Value1.3080.02
Percentage of DerivativeLiabilitiesNoncurrent55.30.0

crk:DerivativeFinancialInstrumentNonCurrent, us-gaap:InterestRateContract


Derivative
Period End2021-03-312020-12-312020-09-302020-06-30
Value0.1771.0561.5391.898
Percentage of DerivativeLiabilitiesNoncurrent89.444.72.314.5

us-gaap:DerivativeNonmonetaryNotionalAmount us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

us-gaap:DerivativeNonmonetaryNotionalAmount

crk:CrudeOilContract, us-gaap:SubsequentEvent


Derivative
Period End2020-08-07
Value0.1825
Percentage of DerivativeNonmonetaryNotionalAmount100.0

crk:NaturalGasContractTwo, us-gaap:SubsequentEvent


Derivative
Period End2020-08-07
Value0.01
Percentage of DerivativeNonmonetaryNotionalAmount5.5

us-gaap:DerivativeNonmonetaryNotionalAmount us-gaap:TradingActivityByType

crk:BasisSwapContracts


Derivative
Period End2020-12-312020-06-302020-03-312019-12-31
Value25364247
Percentage of DerivativeNonmonetaryNotionalAmount0.00.00.00.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value7562000.04562000.07519000.06508000.07552000.04562000.08653000.08476000.05803000.03660000.06045000.03841000.02561000.07682000.06449000.03841000.02561000.01280000.06292000.0107000.0
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:PerformanceShares


Employee
Period End2020-12-312019-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value4.9456.4641.41.72.12.66.13.73.44.35.22.93.74.5
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStock


Employee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value5.73.74.5645.45.53.64.45.16.6159.18.810111214161850
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized0.00.092.30.085.1257.1258.8242.9253.8255.7245.9258.8248.8226.9413.8386.5368.90.00.0

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-31
Value-53.866-17.375-22.588-56.242-6.78124.3510.00.00.0
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:InterestPayableCurrent

us-gaap:InterestPayableCurrent


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value302467383929393032113514204.09214.016204.09225.6852621292330279.011239.003207.0513112311232132311
Percentage of InterestPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseDiscountRate

us-gaap:LesseeOperatingLeaseDiscountRate


Lessee
Period End2020-12-312019-12-31
Value4.35.0
Percentage of LesseeOperatingLeaseDiscountRate100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value2317000.02260000.02366000.02329000.01994000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-312020-09-30
Value1141000.01670000.0647000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:CreditFacility

us-gaap:LongTermDebtFairValue

us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value475550500500800125012501265450
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel

crk:SeniorNotesFivePointEightSevenFivePercentDueTwoThousandThirty, us-gaap:FairValueInputsLevel1


Long
Period End2021-06-30
Value984
Percentage of LongTermDebtFairValue207.2

crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix, us-gaap:FairValueInputsLevel1


Long
Period End2021-03-312020-12-312020-09-302019-12-31
Value95117691687765
Percentage of LongTermDebtFairValue173.0353.9337.461.2

crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFive, us-gaap:FairValueInputsLevel1


Long
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value253253628586534
Percentage of LongTermDebtFairValue53.446.1125.7117.442.8

crk:SeniorNotesSixPointSevenFivePercentDueTwoThousandTwentyNine, us-gaap:FairValueInputsLevel1


Long
Period End2021-06-302021-03-31
Value13281275
Percentage of LongTermDebtFairValue279.6231.8

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-312012-12-312011-12-31
Value165014758500.00.0290586596
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0100.0100.00.00.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive us-gaap:DebtInstrument

crk:SeniorNotesNinePointSevenFivePercentDueTwoThousandTwentySix


Long
Period End2020-12-312019-12-312018-12-31
Value1650850850
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.057.6100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-312012-12-312011-12-31
Value61912504500.08944042970.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0100.0100.00.0100.0100.0100.00.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive us-gaap:DebtInstrument

crk:SeniorNotesSevenPointFivePercentDueTwoThousandTwentyFive


Long
Period End2020-12-312019-12-31
Value6190.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.00.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-312011-12-31
Value5000.00.0879376375600
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.00.00.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour us-gaap:CreditFacility

us-gaap:LineOfCredit


Long
Period End2020-12-312019-12-312018-12-312015-12-31
Value5000.00.00.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.00.00.00.0

us-gaap:OilAndGasJointInterestBillingReceivablesCurrent

us-gaap:OilAndGasJointInterestBillingReceivablesCurrent


Oil
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value23131410111624236.5399.2319.175191710119.7039.5546.0883.1052.0332.3872.7553.5524.0844.9211016252321154923195.6089.8127.4676.9086.6518.941115158.845
Percentage of OilAndGasJointInterestBillingReceivablesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302021-03-312020-09-30
Value2.82.84.4
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentOther

us-gaap:PropertyPlantAndEquipmentOther


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6.7316.7076.8586.5886.616.8216.8666.7684.54.4494.4424.44181818191919191919191919191919191918181818181918181818181817186.477
Percentage of PropertyPlantAndEquipmentOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvedOilAndGasPropertySuccessfulEffortMethod

us-gaap:ProvedOilAndGasPropertySuccessfulEffortMethod


Proved
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value49814812464744194309423440773863186817771682156827762732263139003883383537973774376837834332429942664405428241584046392937813631351734453779366435193365347630872943276625742289
Percentage of ProvedOilAndGasPropertySuccessfulEffortMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value5.965.85.85.85.966.118.711.1415.69.9119.9124.0428.0131.25
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TaxCreditCarryforwardAmount us-gaap:IncomeTaxAuthority

us-gaap:TaxCreditCarryforwardAmount

crk:YearsOfExpirationCarryforwardUnlimited


Tax
Period End2020-12-312019-12-312018-12-31
Value6.4923.813132
Percentage of TaxCreditCarryforwardAmount100.0100.0100.0

us-gaap:DomesticCountry


Tax
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value899906930923745558212
Percentage of TaxCreditCarryforwardAmount13862.523769.1701.20.00.00.00.0

us-gaap:StateAndLocalJurisdiction


Tax
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value15521538153115171521
Percentage of TaxCreditCarryforwardAmount23915.340339.71153.90.00.0

us-gaap:UnamortizedDebtIssuanceExpense

us-gaap:UnamortizedDebtIssuanceExpense


Unamortized
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-312017-09-302016-12-312016-09-302015-12-31
Value4140343525221012161719
Percentage of UnamortizedDebtIssuanceExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnprovedOilAndGasPropertySuccessfulEffortMethod

us-gaap:UnprovedOilAndGasPropertySuccessfulEffortMethod


Unproved
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3393363323843833844104211871881917676848085161201192178174134737496263338362367369199196182225130
Percentage of UnprovedOilAndGasPropertySuccessfulEffortMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:OtherAssetsCurrent
us-gaap:BalanceSheetLocation
(None,)
Other Assets Currentus-gaap: Balance Sheet Location
us-gaap:LongTermDebt
us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel
(None, 'us-gaap:FairValueInputsLevel1')
Long Term Debtus-gaap: Debt Instrument, us-gaap: Fair Value By Fair Value Hierarchy Level
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components