OAS


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

Table of contents



us-gaap:CommonStockValue
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:PreferredStockParOrStatedValuePerShare
us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding

us-gaap:PreferredStockSharesAuthorized

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
us-gaap:Restatement

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:Restatement

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic
us-gaap:Restatement

us-gaap:EarningsPerShareDiluted
us-gaap:Restatement

us-gaap:AllocatedShareBasedCompensationExpense
dei:LegalEntity, us-gaap:AwardType
us-gaap:AwardType
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ConsolidatedEntities, us-gaap:ProductOrService
us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService

us-gaap:CostsAndExpenses
us-gaap:ConsolidatedEntities

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:ConsolidatedEntities
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

us-gaap:GeneralAndAdministrativeExpense
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidatedEntities

us-gaap:IncomeTaxesPaid

us-gaap:InterestExpense
us-gaap:ConsolidatedEntities
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebt
us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest
us-gaap:ConsolidatedEntities

us-gaap:NonoperatingIncomeExpense
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingIncomeLoss
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OtherNonoperatingIncomeExpense
us-gaap:ConsolidatedEntities

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities, us-gaap:ProductOrService
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:MajorCustomers
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:Revenues

us-gaap:Assets
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:Liabilities
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:AssetsCurrent
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:AccountsReceivableNetCurrent
us-gaap:ConsolidatedEntities

us-gaap:ReceivablesNetCurrent

us-gaap:InventoryNet
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:OtherAssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:ConsolidatedEntities
us-gaap:FairValueByMeasurementBasis, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment
us-gaap:Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:OtherAssetsNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:AccountsPayableCurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:AccruedLiabilitiesCurrent
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment
us-gaap:DebtInstrument
us-gaap:DebtCurrent

us-gaap:LiabilitiesCurrent
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment
us-gaap:ConsolidatedEntities
us-gaap:LongTermDebtCurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:OperatingLeaseLiabilityCurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:LongTermDebt
dei:LegalEntity
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtNoncurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:DeferredIncomeTaxLiabilitiesNet
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:MinorityInterest
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:OtherLiabilitiesNoncurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:OperatingLeaseLiabilityNoncurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:AdditionalPaidInCapital
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:AdditionalPaidInCapitalCommonStock
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:TreasuryStockValue
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:MinorityInterest
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:ConsolidatedEntities

us-gaap:ProfitLoss
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:PaymentsOfDividends

us-gaap:Dividends
us-gaap:Dividends
us-gaap:Dividends, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:DebtInstrument
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:Range

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsValuationAllowance

oas:AdjustmentsToAdditionalPaidInCapitaWarrantExercised
us-gaap:StatementEquityComponents

oas:CapitalExpendituresCashandNonCash
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

oas:ChangeInCapitalExpendituresIncurredButNotYetPaid
us-gaap:StatementEquityComponents
oas:ClassOfWarrantOrRightExercisedDuringThePeriod

oas:CommonControlTransactionCosts
us-gaap:StatementEquityComponents
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
oas:ConsiderationContributedPartnership

oas:ContractWithCustomerLiabilityCashReceived

oas:DebtDiscountAmortizationAndOther
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:DebtInstrumentGeneralDebtObligationMaximumConsolidatedInterestCoverageRatio
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:DebtInstrumentGeneralDebtObligationMaximumConsolidatedTotalLeverageRatio
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:DebtInstrumentGeneralDebtObligationMaximumSeniorSecuredLeverageRatio
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:DebtInstrumentGeneralDebtObligationMinimumConsolidatedInterestCoverageRatio

oas:DebtorReorganizationItemsWriteOffOfDebtDiscounts

oas:DebtorReorganizationItemsWriteOffOfDebtIssuanceCosts

oas:EffectiveIncomeTaxRateReconciliationDischargeOfDebtAndOtherReorganizationItemsAmount

oas:EffectiveIncomeTaxRateReconciliationDischargeOfDebtAndOtherReorganizationItemsPercent
us-gaap:StatementEquityComponents
oas:EquityPortionAttributableToLimitedPartnersCapitalAccountTransactions
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:ExtinguishmentOfDebtAccruedInterestAmount

oas:FreshStartAdjustmentGalinLossOnRevaluationAdjustments

oas:FreshStartAdjustmentIncomeTaxBenefitLoss

oas:FreshStartAdjustmentNetIncomeLoss

oas:FreshStartAdjustmentNetIncomeLossFromFreshStartAdjusmentsAttributableToNoncontrollingInterest

oas:FreshStartAdjustmentNetIncomeLossFromFreshStartAdjustmentsIncludingNoncontrollingInterest
us-gaap:TitleOfIndividual, us-gaap:PlanName
oas:IncentiveCompensationProgramExcessOfCashValueOverAfterTaxValueOfPrepaidCashIncentivesPaymentsMade
dei:LegalEntity, us-gaap:Ownership
oas:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerPercentageAcquired
us-gaap:AssetAcquisition, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:LineOfCreditFacilityIncreaseDecreaseInMaximumBorrowingCapacity
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:LongtermDebtType
us-gaap:LitigationCase, us-gaap:LitigationStatus
oas:LitigationSettlementAmountAwardedToOtherPartyPortionDueOnEffectiveDateOfPlan

oas:NonCashAssetRetirementObligations
us-gaap:OtherCommitments
oas:OtherCommitmentDeficiencyFee

oas:PaymentOfEstimatedIncomeTax
us-gaap:AssetAcquisition
oas:PaymentsForAssetAcquisitionsDeposit

oas:PaymentsOfCommonControlTransactionCosts
us-gaap:PlanName
oas:PercentageOfNewEquityAtEmergence
us-gaap:PlanName
oas:PercentageOfNewEquityAtEmergenceRequiredToBeAllocated
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
oas:ProceedsFromDivestitureOfInterestNetOfAdjustments

oas:ReorganizationFairValueAssumptionsCommonStockPerShare

oas:ReorganizationFairValueAssumptionsRiskFreeInterestRate

oas:ReorganizationFairValueAssumptionsWarrantsAndRightsOutstanding

oas:ReorganizationValueDIPCreditFacilityFees

oas:ReorganizationValueGainLossOnDebtDischarge

oas:ReorganizationValueGainLossOnSettlementsOfLiabilitiesSubjectToCompromise

oas:ReorganizationValueWriteOffOfUnamortizedDebtDiscount

oas:ReorganizationValueWriteOffOfUnamortizedDeferredFinancingCosts
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:RepaymentsOfLineOfCreditAccruedInterest

oas:RightOfUseAssetReducedFromReductionOperatingLeaseLiability

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:AmortizationOfDebtDiscountPremium
us-gaap:PublicUtilitiesInventory
us-gaap:AssetImpairmentCharges

us-gaap:AssetRetirementObligationAccretionExpense

us-gaap:AssetRetirementObligationLiabilitiesIncurred
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark
us-gaap:ConcentrationRiskPercentage1

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations

us-gaap:CostsIncurredAcquisitionOfOilAndGasProperties

us-gaap:CostsIncurredAcquisitionOfUnprovedOilAndGasProperties

us-gaap:CostsIncurredAssetRetirementObligationIncurred

us-gaap:CostsIncurredDevelopmentCosts

us-gaap:CostsIncurredExplorationCosts
us-gaap:AwardType
us-gaap:DebtorReorganizationItemsEmployeeRelatedCharges

us-gaap:DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees

us-gaap:DeferredFederalIncomeTaxExpenseBenefit

us-gaap:DeferredStateAndLocalIncomeTaxExpenseBenefit

us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:ConsolidatedEntities
oas:AllExchanges, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNonmonetaryNotionalAmountVolume
oas:AllExchanges, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown
us-gaap:StatementGeographical, us-gaap:PropertyPlantAndEquipmentByType

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance

us-gaap:EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther

us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes

us-gaap:EquityFairValueAdjustment

us-gaap:ExplorationExpense
us-gaap:ConsolidatedEntities
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ExtinguishmentOfDebtAmount

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:GainLossOnSaleOfBusiness
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:GainLossOnSaleOfOilAndGasProperty

us-gaap:GainLossOnSaleOfProperties

us-gaap:GainLossOnSaleOfProperty
us-gaap:ConsolidatedEntities

us-gaap:GainLossRelatedToLitigationSettlement
us-gaap:ConsolidatedEntities

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf
us-gaap:ConsolidatedEntities

us-gaap:ImpairmentOfOilAndGasProperties
us-gaap:ConsolidatedEntities
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:StatementGeographical, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:ConsolidatedEntities
us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

us-gaap:IncomeTaxReconciliationMinorityInterestIncomeExpense

us-gaap:IncomeTaxReconciliationNondeductibleExpenseOther

us-gaap:IncomeTaxReconciliationStateAndLocalIncomeTaxes

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInPrepaidExpense

us-gaap:InterestCostsCapitalized

us-gaap:LeaseCost
us-gaap:Ownership
us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
us-gaap:LitigationCase, us-gaap:LitigationStatus
us-gaap:LitigationSettlementAmountAwardedToOtherParty
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermDebtWeightedAverageInterestRateOverTime

us-gaap:NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance
us-gaap:StatementEquityComponents

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseExpense
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingLeasePayments

us-gaap:PartnersCapitalAccountRedemptions

us-gaap:PaymentsForFees
us-gaap:LitigationCase, us-gaap:LitigationStatus
us-gaap:PaymentsForLegalSettlements

us-gaap:PaymentsForProceedsFromDerivativeInstrumentInvestingActivities

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:AssetAcquisition
us-gaap:PaymentsToAcquireLand
us-gaap:StatementScenario, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

us-gaap:PaymentsToExploreAndDevelopOilAndGasProperties

us-gaap:PaymentsToMinorityShareholders

us-gaap:ProceedsFromDerivativeInstrumentInvestingActivities
us-gaap:Energy, us-gaap:DerivativeInstrumentRisk
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries

us-gaap:ProceedsFromIncomeTaxRefunds

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromIssuanceOfWarrants

us-gaap:ProceedsFromLongTermLinesOfCredit

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleOfOilAndGasPropertyAndEquipment

us-gaap:ProductionTaxExpense
us-gaap:ConsolidatedEntities

us-gaap:ReorganizationItems
us-gaap:ConsolidatedEntities
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLongTermLinesOfCredit

us-gaap:RepaymentsOfUnsecuredDebt
us-gaap:ProductOrService
us-gaap:ResultsOfOperationsIncomeTaxExpense
us-gaap:ProductOrService
us-gaap:ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts
us-gaap:ProductOrService
us-gaap:ResultsOfOperationsProductionOrLiftingCosts

us-gaap:ResultsOfOperationsTransportationCosts
us-gaap:ConsolidatedEntities
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:SubsidiarySaleOfStock
us-gaap:SaleOfStockConsiderationReceivedOnTransaction
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodIntrinsicValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:Range, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
us-gaap:Range, us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
us-gaap:AwardType, us-gaap:Vesting
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
us-gaap:StatementEquityComponents
us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:ShortTermLeaseCost
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockAcquiredAverageCostPerShare
us-gaap:StatementEquityComponents
us-gaap:TreasuryStockSharesAcquired

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:ValuationAllowanceDeferredTaxAssetChangeInAmount

us-gaap:VariableLeaseCost
us-gaap:AwardType
us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:WriteOffOfDeferredDebtIssuanceCost
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

oas:AccruedBulkPurchases

oas:AccruedCapitalCost

oas:AccruedCapitalCosts

oas:AccruedDividendsPayable

oas:AccruedGeneralAndAdministrativeExpense

oas:AccruedLeaseOperatingExpense

oas:AccruedMidstreamOperatingExpense

oas:AccruedWellServicesandMidstreamOperatingExpense

oas:AdvancesFromJointInterestPartnersCurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:AssetRetirementObligationFreshStartAdjustment

oas:AssetRetirementObligationsFairValueAssumptionsRiskFreeRate

oas:AssetRetirementObligationsFairValueMeasurementsInflationFactor

oas:AssetRetirementObligationsReclassifiedToLiabilitiesSubjectToCompromise
us-gaap:Range, us-gaap:StatementScenario
oas:CapitalExpendituresIncreaseDecreasePercent
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
oas:ConsiderationReceivedFromDivestiture
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
oas:ContingentConsiderationReceivable
us-gaap:FairValueByMeasurementFrequency
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:DebtInstrumentCovenantTermsMaximumProFormaLeverageRatio
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:DebtInstrumentCovenantTermsMaximumProFormaLeverageRatioSubjectToDefaultAndAvailability
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:DebtInstrumentCovenantTermsMinimumProFormaLeverageRatioSubjectToDefaultAndAvailability
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:DebtInstrumentCovenantTermsPercentageOfAvailability
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:DebtorInPossessionFinancingAmountArrangedAmountAvailableToBorrower
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:DebtorInPossessionFinancingConsentingLendersClaimPercentage
us-gaap:LongtermDebtType
us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

oas:DeferredTaxLiabilitiesInvestmentinSubsidiaries
us-gaap:StatementBusinessSegments
oas:DerivateAssetAnnualIncreaseInCommodityPrices

oas:DerivativeInstrumentFairValueMeasurementsRiskFreeRate
us-gaap:OtherCommitments, us-gaap:SubsequentEventType
oas:DerivativeNonmonetaryNotionalAmountPercentOfTargetPrice
us-gaap:OtherCommitments, us-gaap:SubsequentEventType
oas:DerivativeNonmonetaryNotionalAmountPercentOfTargetVolume
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
oas:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentAccumulatedDepreciation
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
oas:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentGross
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
oas:DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentGrossNoncurrent

oas:FinanceLeaseRightOfUseAssetAccumulatedDepreciation

oas:FreshStartAdjustmentIncreaseDecreaseAssetRetirementObligations
us-gaap:DebtInstrument
oas:FreshStartAdjustmentIncreaseDecreaseFairValueOfDebtRelatedToCreditFacility

oas:FreshStartAdjustmentIncreaseDecreaseFairValueOfNonControllingInterest

oas:FreshStartAdjustmentIncreaseDecreaseImpliedValue
us-gaap:ProductOrService
oas:FreshStartAdjustmentIncreaseDecreaseInInventoryFairValueAdjustments

oas:FreshStartAdjustmentsDeferredFinancingCostAdjustmentRelatedToInfrastructureCosts
us-gaap:DebtInstrument
oas:FreshStartAdjustmentsDeferredFinancingCostsAdjustment

oas:FreshStartAdjustmentsDeferredFinancingCostsAdjustmentRelatedToFinanceLeaseRightOfUseAssets
us-gaap:PlanName
oas:IncentiveCompensationProgramCapitalizedAfterTaxPaymentsMade
us-gaap:PlanName
oas:IncentiveCompensationProgramPaymentsMadePercentageOfTarget

oas:InventoryCurrentAndNoncurrent

oas:InventoryCurrentandNoncurrent

oas:InventoryNoncurrentLinefill

oas:LesseeLeaseLiability

oas:LesseeRightOfUseAsset

oas:LiabilitiesSubjectToCompromiseAccruedInterestOnDebt

oas:LiabilitiesSubjectToCompromiseAssetRetirementObligations

oas:LiabilitiesSubjectToCompromiseDebt
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
oas:LineOfCreditFacilityMaximumBorrowingBaseDueToElectedCommitments

oas:LongTermDebtReclassifiedToLiabilitiesSubjectToCompromise
us-gaap:AssetAcquisition
oas:NumberOfAcresAcquiredNet
us-gaap:OtherCommitments
oas:OtherCommitmentShortFallPayment

oas:ProductionTaxesPayable

oas:ProvedOilAndGasPropertiesNet

oas:ReorganizationValueAccountsPayableAndAccruedLiabilities

oas:ReorganizationValueAccruedInterestOnNotes

oas:ReorganizationValueAssetRetirementObligation

oas:ReorganizationValueCommonStockValueCancelled

oas:ReorganizationValueCompensationForVestingAwardsEquity
us-gaap:DebtInstrument
oas:ReorganizationValueDeferredFinancingCosts

oas:ReorganizationValueFairValueMethodExercisePriceOfWarrantsOrRights

oas:ReorganizationValueFundingOfProfessionalFeeEscrowAccount

oas:ReorganizationValueIncreaseDecreaseInAccruedLiabilitiesNet

oas:ReorganizationValueIncreaseDecreaseInAdditionalPaidInCapital

oas:ReorganizationValueLiabilitiesSubjectToCompromise

oas:ReorganizationValueLiabilitiesSubjectToCompromiseAccountsPayable

oas:ReorganizationValueNotes

oas:ReorganizationValueOtherLiabilities

oas:ReorganizationValuePaymentOfContractCure
us-gaap:DebtInstrument
oas:ReorganizationValuePaymentOfDIPAccruedInterestAndFees
us-gaap:DebtInstrument
oas:ReorganizationValuePaymentOfDIPFacilityPrincipal

oas:ReorganizationValuePaymentOfDebtIssuanceCostsRelatedToExitFacility

oas:ReorganizationValuePaymentOfProfessionalFees

oas:ReorganizationValuePaymentOfProfessionalFeesUponEmergence

oas:ReorganizationValuePercentageOfVotingInterestReceived

oas:ReorganizationValuePostPetitionLiabilitiesAndAllowedClaims

oas:ReorganizationValueProfessionalFeeAccrued

oas:ReorganizationValueReclassificationOfPayableForVestedAwards

oas:ReorganizationValueReinstatementOfAccruedExpensesFromLiabilitiesSubjectToCompromise

oas:ReorganizationValueReinstatementOfLiabilitiesUnsecuredClaims

oas:ReorganizationValueRelatedToSuccessorAssets

oas:ReorganizationValueRestrictedCash

oas:ReorganizationValueTreasuryStockValueCancelled

oas:ReorganizationValueUsesOfCash

oas:ReorganizationValueVestingOfCompensationAwardsClassifiedAsLiabilities

oas:RevenueSuspense

oas:RevenuesPayableAndProductionTaxesCurrent
us-gaap:ConsolidatedEntities

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts

srt:FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows
us-gaap:Energy, us-gaap:OilAndGasDeliveryCommitmentsAndContracts
srt:OilAndGasDeliveryCommitmentsAndContractsRemainingContractualVolume

srt:ProvedDevelopedAndUndevelopedReserveNetEnergy

srt:ProvedDevelopedAndUndevelopedReservesNet

srt:ProvedDevelopedReservesBOE1

srt:ProvedDevelopedReservesVolume

srt:ProvedUndevelopedReserveBOE1

srt:ProvedUndevelopedReserveVolume

srt:StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves

us-gaap:AccountsReceivableGrossCurrent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType

us-gaap:AccruedRoyaltiesCurrent
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:AccumulatedAmortizationDeferredFinanceCosts
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetRetirementObligation

us-gaap:AssetRetirementObligationCurrent

us-gaap:AssetRetirementObligationsNoncurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:CapitalizedCostsOilAndGasProducingActivitiesNet
us-gaap:SubsequentEventType
us-gaap:ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerLiability

us-gaap:DebtInstrumentCarryingAmount
dei:LegalEntity, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentRepurchaseAmount
us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentRepurchasedFaceAmount
us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnusedBorrowingCapacityAmount
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:DebtWeightedAverageInterestRate

us-gaap:DebtorInPossessionFinancingAmountArranged
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsNet
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredIncomeTaxAssetsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOtherTaxCarryforwards

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DerivativeAssets
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeAssetsCurrent
us-gaap:ConsolidatedEntities

us-gaap:DerivativeAssetsNoncurrent
oas:AllExchanges, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAverageCapPrice
oas:AllExchanges, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
oas:AllExchanges, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeAverageFloorPrice
oas:AllExchanges, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType
us-gaap:SubsequentEventType
us-gaap:Energy, us-gaap:StatementBusinessSegments
us-gaap:DerivativeCapPrice

us-gaap:DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities

us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFairValueOfDerivativeNet

us-gaap:DerivativeLiabilities
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilitiesCurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:DerivativeLiabilitiesNoncurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:DerivativeLiabilityFairValueGrossAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk
dei:EntityListingsExchange, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeSwapTypeAverageFixedPrice
oas:AllExchanges, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk
oas:AllExchanges, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

us-gaap:DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationInventory1
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationInventoryNoncurrent

us-gaap:DividendsPayableCurrentAndNoncurrent
us-gaap:Dividends
us-gaap:ConsolidatedEntities
us-gaap:DueFromAffiliateCurrent
us-gaap:AwardType, us-gaap:PlanName
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:AwardType, us-gaap:PlanName
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:EnergyRelatedInventoryPetroleum

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FreshStartAdjustmentIncreaseDecreaseCashAndCashEquivalents

us-gaap:FreshStartAdjustmentIncreaseDecreaseOtherCurrentLiabilities

us-gaap:FreshStartAdjustmentIncreaseDecreaseOtherNoncurrentObligations

us-gaap:FreshStartAdjustmentIncreaseDecreaseRetainedEarningsDeficit

us-gaap:FreshStartAdjustmentIncreaseDecreaseStockholdersEquity
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:GeneralPartnersCumulativeCashDistributions

us-gaap:InterestPayableCurrent
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:InventoryNoncurrent
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment
us-gaap:ConsolidatedEntities
us-gaap:InvestmentsInAndAdvancesToAffiliatesAtFairValue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByLiabilityClass, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByLiabilityClass, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:LiabilitiesSubjectToCompromise
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:LiabilitiesSubjectToCompromiseAccountsPayableAndAccruedLiabilities

us-gaap:LiabilitiesSubjectToCompromiseOtherLiabilities
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:StatementScenario, us-gaap:CreditFacility, us-gaap:LongtermDebtType
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument
us-gaap:LongTermDebtFairValue
us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners
us-gaap:Ownership
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:NotesAndLoansReceivableGrossCurrent
us-gaap:LongtermDebtType
us-gaap:OffBalanceSheetCreditLossLiability
us-gaap:LossContingenciesByNatureOfContingency

us-gaap:OilAndGasPropertySuccessfulEffortMethodAccumulatedDepreciationDepletionAndAmortization

us-gaap:OilAndGasPropertySuccessfulEffortMethodGross
us-gaap:ConsolidatedEntities
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OperatingLossCarryforwardsValuationAllowance

us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:OtherCommitment
us-gaap:OtherCommitments
us-gaap:OtherCommitments, us-gaap:SubsequentEventType

us-gaap:OtherCommitmentDueAfterFifthYear

us-gaap:OtherCommitmentDueInFifthYear

us-gaap:OtherCommitmentDueInFourthYear

us-gaap:OtherCommitmentDueInNextTwelveMonths

us-gaap:OtherCommitmentDueInSecondYear

us-gaap:OtherCommitmentDueInThirdYear

us-gaap:OtherInventorySupplies

us-gaap:PrepaidExpenseCurrent
us-gaap:ConsolidatedEntities
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:PropertyPlantAndEquipmentOther
us-gaap:ConsolidatedEntities
us-gaap:FairValueByMeasurementBasis
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:PropertyPlantAndEquipmentOtherAccumulatedDepreciation
us-gaap:FairValueByMeasurementBasis

us-gaap:PropertyPlantAndEquipmentOtherNet
us-gaap:FairValueByMeasurementBasis

us-gaap:ProvedOilAndGasPropertySuccessfulEffortMethod

us-gaap:ReorganizationValue
us-gaap:Range

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:RestrictedCashAndCashEquivalentsNoncurrent

us-gaap:RestrictedCashCurrent
us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:RevenueRemainingPerformanceObligation
us-gaap:SubsidiarySaleOfStock
us-gaap:SaleOfStockPricePerShare

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:AwardType, us-gaap:PlanName
us-gaap:AwardType
us-gaap:SharePrice

us-gaap:StockRepurchaseProgramAuthorizedAmount1

us-gaap:UnprovedOilAndGasPropertySuccessfulEffortMethod
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:UnsecuredDebt

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Other Nonoperating Income Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Derivative Assets
Current Assets
Other Assets Current
NonCurrent Assets
Deferred Income Tax Assets Net
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Other Liabilities Current
Noncurrent Liabilities
Deferred Income Tax Liabilities Net
Stockholders Equity
Retained Earnings Accumulated Deficit
Per Share
Dividends Payable Amount Per Share
CashFlow
Net Income Loss
NetCashProvidedByUsedInOperatingActivities
Share Based Compensation
NetCashProvidedByUsedInFinancingActivities
Proceeds From Payments For Other Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Noncurrent
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:CommonStockValue ▁▁▁▆█▆▆▆▆▆▆▆▆▆▅▅▅▅0.20.20.23.2324.2393.2213.1893.1863.1833.1823.1573.1573.1543.1542.6682.3482.3452.344
us-gaap:PreferredStockParOrStatedValuePerShare NANANANANANANANANANANANANANANANANANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock▁▁▁███████████▇▆▆▆19.90420.09320.093320.931320.984324.125321.231321.344321.894322.051318.377318.419317.985317.363269.295237.313237.41237.461
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:TreasuryStock0.191NANA-4.196-4.161-3.9092.967-2.8912.7862.7782.0922.0892.0252.0221.3321.3271.2321.23
us-gaap:PreferredStockSharesAuthorized NANANANANANANANANANANANANANANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁▁▁███20.82220.019.991318.287317.629316.828NA315.135314.982314.464NA316.387313.072291.738NA233.389234.917237.9
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁▁▁███19.90420.019.991318.287317.629316.828NA315.135314.982314.464NA313.167313.072290.105NA233.389233.283233.068
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted NA20.019.991318.287317.629316.828NA315.135314.982314.464NA313.167313.072NANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities oas:RestrictedStockAwardsAndPerformanceShareUnits▁█2.1682.265NA4.2928.67611.166NA9.82510.4069.8NA4.187.515NANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities oas:RestrictedStockAwardsandPerformanceStockUnitsNANA0.009NANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic █▆▅▆▆▁▆▇▇▆▇▇▆▇▇▆▇▇3.69-2.18-2.5-0.17-0.29-13.61-0.240.060.14-0.370.710.2-1.020.00.52-0.180.070.1
us-gaap:EarningsPerShareDiluted █▆▆▆▆▁▆▇▇▆▇▇▆▇▇▆▇▇3.52-2.18-2.5-0.17-0.29-13.61-0.240.060.14-0.370.70.2-1.020.00.52-0.180.070.1
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 COGS Ratio us-gaap:ConsolidatedEntities,us-gaap:ProductOrService srt:ParentCompany,oas:MidstreamServicesNANANA2.168NANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ConsolidatedEntities,us-gaap:ProductOrService srt:ParentCompany,oas:OtherServicesNANANA0.309NANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ConsolidatedEntities,us-gaap:ProductOrService srt:ParentCompany,us-gaap:OilAndGasPurchasedNANANA44.194NANANANANANANANANANANANANANA
 COGS Ratio us-gaap:ProductOrService oas:MidstreamServices▇█▃▆▄▇█▆▆▆▃▃▃▃▂▁▁55.78361.31226.03146.97934.77456.41162.59150.02351.57348.02130.58931.18729.34227.92223.81318.76715.566NA
 COGS Ratio us-gaap:ProductOrService oas:OtherServices0.195NANA0.3090.3965.981NA8.89811.43910.458NANANANANANANANA
 COGS Ratio us-gaap:ProductOrService us-gaap:OilAndGasPurchased▂▂▁▂▁▂▂▂▃▃█▂▂▂▂▁▁▁81.85548.467.22744.19437.35286.27871.57979.352109.389148.471429.83746.35657.57867.70961.54721.1958.09120.274
 Cost Ratio us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA225.862NANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA225.862NANANANANANANANANANANANANANA
 EBT Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,oas:MidstreamServices█▅▂▄▃▄▅▄▄▄▂▂▂▂▂▁▁106.16372.76126.12155.42344.52656.41162.59350.02351.60148.02130.47433.02532.71727.92223.81318.76715.566NA
 Net profit Margin us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA225.862NANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA225.862NANANANANANANANANANANANANANA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,oas:ExplorationAndProduction▃▃▁▂▁▃▄▄▅▅█▅▄▄▄▃▂328.987282.69893.794215.636121.826331.387410.092423.822466.365517.253807.741497.161450.124434.304406.726269.843226.724NA
 Operating Margin us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,oas:MidstreamServices█▅▂▄▃▄▅▄▄▄▂▂▂▂▂▁▁106.16372.76126.12155.42344.52656.41162.59350.02351.60148.02130.47433.02532.71727.92223.81318.76715.566NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 TTM Greenblatt ROC _ _████▇▁██████▇█████375.573150.83538.77638.524-11.224-4862.52823.9668.44171.57250.44469.656179.045-242.674112.98586.10332.3945.37920.092
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AllocatedShareBasedCompensationExpense ▅▃▁▅▅▆▇███▇▇▇▆4.7022.1980.274.8344.896.8077.2378.4468.9119.0137.6877.4567.3766.754NANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidatedEntities,us-gaap:ProductOrService srt:ParentCompany,oas:MidstreamServicesNANANA0.059NANA0.00.00.00.00.00.00.00.00.00.00.0NA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidatedEntities,us-gaap:ProductOrService srt:ParentCompany,oas:OtherServicesNANANA0.308NANANANANANANANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidatedEntities,us-gaap:ProductOrService srt:ParentCompany,us-gaap:OilAndGasPurchasedNANANA47.608NANA0.00.00.00.00.00.00.00.00.00.00.0NA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService oas:MidstreamServices▇█▃▃▂▄▄▄▅▅▂▃▂▂▂▁▁23.54727.89810.57211.118.16113.08415.08212.96717.36816.7297.5878.6527.6887.9856.6984.3013.263NA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService oas:OtherServices0.021NANA0.3080.7294.931NA6.1518.4746.97NANANANANANANANA
 us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService us-gaap:OilAndGasPurchased▂▂▁▂▁▂▂▂▃▃█▂▂▂▂▁▁▁85.45548.417.35747.54933.1885.20370.95978.655109.662149.904433.05646.08857.16570.59462.04321.7017.9820.638
us-gaap:CostsAndExpenses ▁▁▁▁▁█▂▂▂▂▂▁▂▁▁▁▁▁240.467204.71281.15234.008176.5295261.552459.393473.55457.557522.366773.054404.272745.965308.231350.546272.354248.712265.024
us-gaap:GainsLossesOnExtinguishmentOfDebt NANANA-0.020.083.8874.3120.00.00.0-0.15-0.047-13.651NA0.00.00.00.0
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA-0.02NANANANANANA-0.15-0.047-13.651NANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType oas:A2.625PercentSeniorNotesDueSeptember2023,us-gaap:UnsecuredDebtNANANA3.73.73.72.7NANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType us-gaap:UnsecuredDebtNANANA0.00.080.21.6NANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▂▂▁▇▅▄▃█▄▅▄▅▄▃▂▃▃▃20.2120.73714.22449.25137.44331.17425.26152.8630.92634.45930.31734.85928.2327.9421.88422.53123.54823.834
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ████▇▁▇██▇██▇█▇▇██84.963-38.919-49.409-52.241-91.962-4589.013-88.03412.93963.414-111.681296.41491.005-417.3024.54-74.717-59.9118.90739.862
us-gaap:IncomeTaxExpenseBenefit ▇▆▆▆▆▁▆▆▇▆█▇▄▇▂▆▇▇3.654-3.654-3.447-5.144-2.613-254.738-23.88-17.37212.24-3.70369.54824.782-101.0010.828-202.834-18.8462.33916.037
us-gaap:IncomeTaxesPaid NANA0.001NANANANANANANANANANANANANANANA
us-gaap:InterestExpense ▂▁▁▄▄█▄▄▄▄▄▄▄▄▄▄▄▄22.5718.6973.16837.38944.38895.75744.67243.89743.18644.46841.46939.5640.9137.14636.28937.38936.83836.321
 us-gaap:InterestExpenseDebt us-gaap:CreditFacility,us-gaap:DebtInstrument,us-gaap:LongtermDebtType us-gaap:RevolvingCreditFacility,oas:OMPRevolvingLineofCredit,us-gaap:LineOfCreditNANANA0.02.125.9NANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:CreditFacility,us-gaap:LongtermDebtType us-gaap:RevolvingCreditFacility,us-gaap:LineOfCreditNANANA0.01.0NANANANANANANANANANANANANA
us-gaap:InterestPaidNet NANA2.411NANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss █████▁███▇██▇█████73.364-43.592-49.912-55.699-92.943-4310.861-76.40620.28842.757-114.882221.97762.341-320.2040.59124.617-41.21416.56823.825
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest ▇▇▆▇▆▁██▇▇▇▆▆▆▆▆▆▆7.9458.3273.958.6023.594-23.41412.25210.0238.4176.9044.8893.8823.9033.1223.50.150.00.0
us-gaap:NonoperatingIncomeExpense ▁▂▄▃▄█▃▅▅▃▇▄▂▃▃▃▅▅-290.61-189.754-88.185-90.765-80.738273.515-112.04.498-8.158-162.125226.758-88.04-174.628-108.445-160.82-92.30413.52819.77
 us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA-35.745NANA-82.27921.62341.441-122.368220.01563.672-324.8-0.282216.995-46.4915.869NA
 us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,oas:ExplorationAndProduction▁▂▃▃▃█▃▄▄▂▇▃▂▃▂▃▅▅-279.602-185.896-87.161-87.953-75.465303.998-107.3978.871-3.97-158.382228.046-87.594-174.572-108.146-160.796-92.31913.52519.768
 us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,oas:MidstreamServices▅▇█▇▇▁▇▇▇▇████████-11.008-3.858-1.024-2.812-5.273-30.483-4.605-4.512-4.2-3.748-1.422-0.367-0.079-0.258-0.024-0.0150.003-0.002
us-gaap:OperatingIncomeLoss ████▇▁██████▇█████375.573150.83538.77638.524-11.224-4862.52823.9668.44171.57250.44469.656179.045-242.674112.98586.10332.3945.37920.092
us-gaap:OtherNonoperatingIncomeExpense ▁▅▃█▆▄▃▅▅▄▄▄▄▃▂▂▃▄-1.0020.458-0.4021.4730.8370.063-0.2660.4730.279-0.046-0.0250.1110.218-0.183-0.577-0.605-0.1660.016
 us-gaap:OtherNonoperatingIncomeExpense us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA1.48NANA0.0010.0010.0010.00.0010.00.00.0-0.0010.0020.0NA
us-gaap:ProfitLoss █████▁███▇██▇█████81.309-35.265-45.962-47.097-89.349-4334.275-64.15430.31151.174-107.978226.86666.223-316.3013.712128.117-41.06416.56823.825
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▅▄▁▃▂▅▆▆▇██▇▇▆▆▄▃▃393.06355.459119.915271.059166.352387.798483.864482.743529.405575.732599.755546.448501.337473.812434.875304.748254.091277.752
us-gaap:Revenues ▅▄▁▃▂▅▆▆▇██▇▇▆▆▄▃▃393.06355.459119.915271.059166.352387.798483.864482.743529.405575.732599.755546.448501.337473.812434.875304.748254.091277.752
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:Assets ▂▁▁▁▂▂████████▇▆▆▆2936.7162297.1782159.0372506.7772625.6262869.8357499.2537666.9777710.2887646.3467626.1427416.4317465.3357638.936615.136391.2126261.7216189.628
us-gaap:Liabilities ▃▁▁▆▆▇▇███████▆▇▆▆1914.9431335.1751146.2983144.9283215.5373369.0073662.1723767.3163843.833835.2113707.2623772.3483891.0843752.7723101.5513332.5673284.1113236.154
us-gaap:LiabilitiesAndStockholdersEquity ▂▁▁▁▂▂████████▇▆▆▆2936.7162297.1782159.0372506.7772625.6262869.8357499.2537666.9777710.2887646.3467626.1427416.4317465.3357638.936615.136391.2126261.7216189.628
us-gaap:StockholdersEquity ▄▄▄▁▁▁████████▇▇▇▇836.067864.777915.942-810.015-759.124-670.7393636.1383705.3263676.7723624.7863734.5763505.5263436.1433748.5323375.6912942.6822977.612953.474
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AssetsCurrent █▃▁▂▃▇▄▄▄▅▅▄▃▃▃▂▁▁732.332422.523271.617339.441418.835654.62437.351495.614471.72521.53554.155483.496424.955418.857407.835322.444290.207269.193
us-gaap:CashAndCashEquivalentsAtCarryingValue █▃▁▂▂▃▁▁▁▁▁▁▁▁▁▁▁▁388.915113.05415.85684.26577.408134.00220.01919.42520.25815.44222.1916.89217.07217.73516.728.48811.4413.785
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents █▂▁▂▂▂▁▁▁▁▁▁▁▁▁788.915113.05420.22684.26577.408134.00220.01919.42520.25815.44222.1916.89217.07217.73516.72NANANA
us-gaap:AccountsReceivableNetCurrent ▄▃▁▁▁▂▆▆▆█▆▇▆▆▅▃▁▂302.506268.818206.539202.274201.514220.654371.181381.617396.104456.639387.602428.184378.08370.978363.58285.383218.302226.427
us-gaap:ReceivablesNetCurrent NANA206.539NANANA371.181NANANA387.602NANANA363.58NANANA
us-gaap:InventoryNet ▇▆▇██▇▇█▆█▇▆▄▄▃▂▂▁32.83329.42333.92935.73636.9233.035.25936.75830.05636.26933.12831.40923.22223.03919.36717.16917.94214.327
us-gaap:OtherAssetsCurrent ▆▆▂▄▄▁▁▁▁▁▁▁▁▁▁▁▁█2.8923.0020.7271.781.6670.270.3460.3320.1950.3090.1830.1920.0820.1930.1930.0650.0624.452
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ▁▁▁███▄▄▄▄▃▃▃▃▃▃▃▃81.32756.00317.4918560.5268521.398556.5663764.9153624.1643416.1833233.1063036.8522859.7882691.6972688.3612534.2152388.7092252.6532126.136
us-gaap:PropertyPlantAndEquipmentNet ▁▁▁▂▂▂██████▇█▇▇▆▆1554.6851719.5491728.7872115.8542152.192148.6796977.7767089.617169.1147056.7427027.1096900.1376757.2417186.6066173.4866035.6185931.0145896.481
 us-gaap:Goodwill us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment oas:FreshStartAdjustmentsNANANANANANANANANANANANANANANANANANA
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill NANA28.7NANANA0.7NANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▁▄█42.30542.98643.667NANANANANANANA0.125NANANA0.0NANANA
us-gaap:FiniteLivedIntangibleAssetsNet NANA15.0NANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▁▁▄▅▅▆▇▆█4.9515.4866.08313.12115.23216.02318.49721.25520.05424.741NANANANANANANANA
us-gaap:OtherAssetsNoncurrent █▁▁▁▂▂▂▂▂▂▂▁▁▁▁▁▁▁90.36617.62518.32722.77123.81627.9829.43829.67430.47829.38525.67320.18820.49120.96121.621.56219.90420.139
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:AccountsPayableCurrent ▂▂▁▁▂▄▅▅▄▃▆▅█▅▄▅▄▃4.8676.4923.2421.2985.13114.90217.94818.00315.15510.17220.16617.20629.98816.12713.3716.34812.2578.837
us-gaap:AccruedLiabilitiesCurrent ▅▄▃▁▃▆▇█▇██▇█▆▆▅▃▃223.119152.217126.28441.878143.263244.131281.079325.445315.45338.819331.651307.526320.508233.422236.48194.157139.766128.241
 us-gaap:DebtCurrent us-gaap:DebtInstrument oas:PromissoryNoteDueWithinOneYear600PercentNANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▆▃▁▄▁▃▅▅▄▆▅██▆▅▂▁▁691.425508.639341.231575.294361.353498.674602.883593.861558.428668.846611.776816.686832.515670.013623.48421.698340.682352.511
 us-gaap:LongTermDebtCurrent us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA360.64NANANANANANANANANANANANANANA
 us-gaap:LongTermDebtCurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment oas:ReorganizationAdjustmentsNANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseLiabilityCurrent ▁▁▁▁▂▂▄▅▅█2.1932.1432.6072.0063.4354.3016.1828.057.83713.135NANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent NANA9.002NANANA7.448NANANA14.449NANANA8.837NANANA
us-gaap:OtherLiabilitiesCurrent ▂▃▂▁▂▂▃▂▃▂▁▁▁▁▁▁▁█1.8123.1231.9540.5131.4861.7362.9032.7823.232.4850.00.040.040.040.040.00.013.435
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:LongTermDebt █▁▂1044.474674.238710.0NA2761.6732777.9322711.5732798.8592896.5242791.3332735.2762633.0092757.4812696.5332097.6062340.6132359.6832305.879
us-gaap:LongTermDebtNoncurrent ▃▂▂▁██▇████▇█▇▆▆▆▆1044.474674.238710.0487.52761.6732777.9322711.5732798.8592896.5242791.3332735.2762633.0092757.4812696.5342097.6062340.6132359.6832305.879
us-gaap:DeferredIncomeTaxLiabilitiesNet 0.984NA0.9844.89810.04212.68267.357291.215308.672296.508300.055230.504205.628306.749305.921508.335NANA
us-gaap:MinorityInterest ▇▁▁▆▆▆██▇▇▇▄▄▄▄▂185.70697.22696.797171.864169.213171.567200.943194.335189.686186.349184.304138.557138.108137.626137.888115.963NANA
us-gaap:OtherLiabilitiesNoncurrent ▆▆█▃▇▅▆▁▇▆██▆█▆▆▅▂5.9216.4067.7443.5977.0665.2136.0192.0846.9576.2397.7517.7756.5297.8226.1825.8055.5062.834
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▁▂▁▇▇███▇1.5521.9342.3620.97317.10917.16917.91519.09518.02117.61NANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA1.548NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA0.787NANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA0.102NANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:StockholdersEquity ▄▄▄▁▁▁████████▇▇▇▇836.067864.777915.942-810.015-759.124-670.7393636.1383705.3263676.7723624.7863734.5763505.5263436.1433748.5323375.6912942.6822977.612953.474
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▄▃▄▁▁▁██████▇█▇▇1021.773962.0031012.739-638.151-589.911-499.1723837.0813899.6613866.4583811.1353918.883644.0833574.2513886.1583513.5793058.645NANA
us-gaap:CommonStockValue ▁▁▁▆█▆▆▆▆▆▆▆▆▆▅▅▅▅0.20.20.23.2324.2393.2213.1893.1863.1833.1823.1573.1573.1543.1542.6682.3482.3452.344
us-gaap:AdditionalPaidInCapital ▁▁▁█870.567958.081965.6543128.752NANA3112.384NANANANANANANANANANANA
us-gaap:AdditionalPaidInCapitalCommonStock NANA965.654NA3122.9123119.0543112.3843104.9383096.3553087.0833077.7553070.6423062.8613055.0032677.2172369.0982362.0842354.485
 us-gaap:AdditionalPaidInCapitalCommonStock us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment oas:ReorganizationAdjustmentsNANANANANANANANANANANANANANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▇▇▇▁▁▁████████████-20.14-93.504-49.912-3905.467-3849.768-3756.825554.446630.852610.564567.807682.689460.712398.371718.575717.985593.368634.582618.014
 us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:ConsolidatedEntities srt:ParentCompanyNANANA-3881.021NANANANANA579.834691.824466.965402.772NA719.951NANANA
 us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment oas:FreshStartAdjustmentsNANANANANANANANANANANANANANANANANANA
 us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment oas:ReorganizationAdjustmentsNANANANANANANANANANANANANANANANANANA
us-gaap:TreasuryStockValue 14.56NANA36.53236.50736.18933.88133.6533.3333.28629.02528.98528.24328.222.17922.13221.40121.369
us-gaap:MinorityInterest ▇▁▁▆▆▆██▇▇▇▄▄▄▄▂185.70697.22696.797171.864169.213171.567200.943194.335189.686186.349184.304138.557138.108137.626137.888115.963NANA
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders █▁6.1366.029NA6.026.0146.028NA5.4585.1564.9373.7213.5473.3963.45NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▆▄▄▁▄▇▇▆▅▇▇█▇▆▄▄▄159.95190.41395.25595.01-47.88107.775252.959250.962214.006174.926234.42229.985303.657228.359209.13988.876102.062107.799
us-gaap:NetCashProvidedByUsedInInvestingActivities █▇▇█▇▆▆▆▅▆▅▇▅▁▅▆▆▆88.618-41.868-9.88160.06918.334-130.768-157.94-143.163-303.651-224.002-359.833-96.969-344.166-812.568-271.805-183.814-154.375-104.766
us-gaap:NetCashProvidedByUsedInFinancingActivities ▆▂▂▁▂▄▂▁▃▃▄▁▃█▃▃▃▂427.293-55.717-85.702-148.222-27.048136.976-94.425-108.63294.46142.328130.711-133.19639.846585.22470.89891.98649.968-0.474
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▂▂▂▁▃▂▂▂▁▂▂▂▂675.86192.828-0.3286.857-56.594113.9830.594-0.8334.816-6.7485.298-0.18-0.6631.015NANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit NA-3.654-3.447-5.144-2.638-254.677-23.859-17.45712.164-3.54769.55224.875-101.1210.828-202.414-18.8462.33916.037
us-gaap:DepreciationDepletionAndAmortization ▂▂▁▂▂███▇▇▇▆▆▆▆▅▅▅38.96839.9916.09436.033.13203.755209.169210.832177.358189.833170.477162.984153.57149.265146.556132.289125.291126.666
us-gaap:IncreaseDecreaseInAccountsReceivable ▇▇▄▆▅▁▅▅▄█▄▇▆▆██▅▆36.16260.542-68.322-0.878-18.052-149.819-12.174-14.469-58.16971.083-37.76755.4090.1585.70877.56567.279-8.73522.478
us-gaap:IncreaseDecreaseInInventories █▂▃▃▆▆▅█▁▆▅█▅▆▅▄▃▆7.386-4.506-1.902-2.5334.4394.32.2176.705-6.2133.1842.277.3551.0493.6722.266-0.772-2.6723.679
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▆▆▇▃▂▅▁█▂▆▁▂▃▂4.6213.8545.8030.7810.0233.275-1.4226.7380.0824.391-1.1160.1490.994-0.248NANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▆▄▄▁▄▇▇▆▅▇▇█▇▆▄▄▄159.95190.41395.25595.01-47.88107.775252.959250.962214.006174.926234.42229.985303.657228.359209.13988.876102.062107.799
us-gaap:NetIncomeLoss █████▁███▇██▇█████73.364-43.592-49.912-55.699-92.943-4310.861-76.40620.28842.757-114.882221.97762.341-320.2040.59124.617-41.21416.56823.825
us-gaap:ProfitLoss █████▁███▇██▇█████81.309-35.265-45.962-47.097-89.349-4334.275-64.15430.31151.174-107.978226.86666.223-316.3013.712128.117-41.06416.56823.825
us-gaap:ShareBasedCompensation ▅▃▁▅▅▆▇███▇▇▇▆▆▆▆▆4.7022.1980.274.8344.896.8077.2378.4468.9119.0137.6877.4567.3766.7546.0836.6287.1156.708
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities █▇▇█▇▆▆▆▅▆▅▇▅▁▅▆▆▆88.618-41.868-9.88160.06918.334-130.768-157.94-143.163-303.651-224.002-359.833-96.969-344.166-812.568-271.805-183.814-154.375-104.766
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▆▂▂▁▂▄▂▁▃▃▄▁▃█▃▃▃▂427.293-55.717-85.702-148.222-27.048136.976-94.425-108.63294.46142.328130.711-133.19639.846585.22470.89891.98649.968-0.474
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType oas:SeniorNotesDueApril12029800Percent,us-gaap:UnsecuredDebtNANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividends ▁█7.5047.535NANANANANANANANANANANANANANANANA
us-gaap:Dividends NA7.535NANANANANANANANANANANANANANANANA
 us-gaap:Dividends us-gaap:Dividends oas:RegularCashDividend█▁8.097.535NANANANANANANANANANANANANANANANA
 us-gaap:Dividends us-gaap:Dividends oas:SpecialCashDividend82.958NANANANANANANANANANANANANANANANANA
 us-gaap:Dividends us-gaap:Dividends,us-gaap:StatementEquityComponents oas:RegularCashDividend,us-gaap:AdditionalPaidInCapital█▁8.097.535NANANANANANANANANANANANANANANANA
 us-gaap:Dividends us-gaap:Dividends,us-gaap:StatementEquityComponents oas:SpecialCashDividend,us-gaap:AdditionalPaidInCapital82.958NANANANANANANANANANANANANANANANANA
 us-gaap:Dividends us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapitalNA7.535NANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument oas:PromissoryNoteDueWithinOneYear600PercentNANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range srt:MaximumNANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range srt:MinimumNANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value200000.0200000.0200000.0200000.03233000.03232000.04239000.03221000.03189000.03186000.03183000.03182000.03157000.03157000.03154000.03154000.02668000.02348000.02345000.02344000.02331000.01779000.01777000.01774000.01376000.01376000.01373000.01372000.01001000.01000000.0999000.0999000.0996000.0926000.0925000.0925000.0925000.0923000.0922000.0922000.0921000.0921000.0921000.0920000.0
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 Assets0.00.00.00.00.10.10.20.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.1

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Common
Period End2020-09-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3232000.03182000.03157000.03157000.03154000.02668000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.00.00.00.0
Percentage of Assets srt:ParentCompany0.20.10.10.10.10.0

us-gaap:CommonStockValue us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:ReorganizationAdjustments


Common
Period End2020-11-192020-11-18
Value200000.0-3233000.0
Percentage of CommonStockValue100.0-100.0
Percentage of Assets0.0-0.1
Percentage of Assets oas:ReorganizationAdjustments-0.40.0

Preferred Stock Par Or Stated Value Per Share

us-gaap:PreferredStockParOrStatedValuePerShare

us-gaap:PreferredStockParOrStatedValuePerShare


Preferred
Period End2020-11-19
Value0.01
Percentage of PreferredStockParOrStatedValuePerShare100.0

Shares Outstanding

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-11-202020-11-192020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value192020202032032032432132132132231831831731726923723723723618118018013913913910110093
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock


Shares
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value0.191-4.196-4.161-3.9092.967-2.8912.7862.7782.0922.0892.0252.0221.3321.3271.2321.230.8570.8520.8020.7150.5080.4920.4040.2860.1670.129
Percentage of SharesOutstanding1.0-1.3-1.3-1.20.9-0.90.90.90.70.70.60.60.50.60.50.50.40.50.40.40.40.40.30.30.20.1

Preferred Stock Shares Authorized

us-gaap:PreferredStockSharesAuthorized

us-gaap:PreferredStockSharesAuthorized


Preferred
Period End2020-11-19
Value5000000.0
Percentage of PreferredStockSharesAuthorized100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value202019318317316315314314316313291233234237177176162137136109100100100929292929292929292928.088
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:Restatement

srt:ScenarioPreviouslyReported


Weighted
Period End2021-03-31
Value19
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding99.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value192019318317316315314314313313290233233233177176162137136109999999929292929292929292928.088
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic us-gaap:Restatement

srt:ScenarioPreviouslyReported


Weighted
Period End2021-03-31
Value19
Percentage of WeightedAverageNumberOfSharesOutstandingBasic99.0

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


Weighted
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value2019318317316315314314313313
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

oas:RestrictedStockAwardsAndPerformanceShareUnits


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value2.1682.2654.2928.676119.825109.84.187.515
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:RestrictedStockAwardsandPerformanceStockUnits


Antidilutive
Period End2020-12-31
Value0.009
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value3.69-2.18-2.5-0.17-0.29-13.61-0.240.060.14-0.370.710.2-1.0200.52-0.180.070.1-0.25-0.19-0.51-0.40.030.2-0.39-0.171.771.220.391.710.570.590.730.560.460.20.82
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareBasic us-gaap:Restatement

srt:ScenarioPreviouslyReported


Earnings
Period End2021-03-312019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-2.20.060.140.2-1.0200.52-0.180.070.1
Percentage of EarningsPerShareBasic100.9100.0100.0100.0100.00.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value3.52-2.18-2.5-0.17-0.29-13.61-0.240.060.14-0.370.70.2-1.0200.52-0.180.070.1-0.25-0.19-0.51-0.40.030.2-0.39-0.171.761.210.391.70.570.590.720.560.460.20.82
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareDiluted us-gaap:Restatement

srt:ScenarioPreviouslyReported


Earnings
Period End2021-03-312019-09-302019-06-302018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-2.20.060.140.2-1.0200.52-0.180.070.1
Percentage of EarningsPerShareDiluted100.9100.0100.0100.0100.00.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4.7022.1980.274.8344.896.8077.2378.4468.9119.0137.6877.4567.3766.754
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.20.60.21.82.91.81.51.71.71.61.31.41.51.4

us-gaap:AllocatedShareBasedCompensationExpense dei:LegalEntity, us-gaap:AwardType

oas:OasisMidstreamPartnersLP, us-gaap:PhantomShareUnitsPSUs


Allocated
Period End2020-09-302020-06-302019-09-302019-06-30
Value0.10.40.10.8
Percentage of AllocatedShareBasedCompensationExpense2.18.21.29.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.20.00.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:OasisMidstreamPartnersLP us-gaap:PhantomShareUnitsPSUs0.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

oas:PerformanceShareUnitAwards


Allocated
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value1.61.92.32.52.5
Percentage of AllocatedShareBasedCompensationExpense33.138.933.829.628.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.61.10.60.50.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:PerformanceShareUnitAwards0.00.00.00.00.0

us-gaap:RestrictedStock


Allocated
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value3.13.04.45.86.3
Percentage of AllocatedShareBasedCompensationExpense64.161.364.668.770.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.11.81.11.21.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RestrictedStock0.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


Allocated
Period End2021-06-302021-03-31
Value1.40.6
Percentage of AllocatedShareBasedCompensationExpense29.827.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RestrictedStockUnitsRSU0.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType, us-gaap:PlanName

oas:LeverageStockUnits, oas:A2020IncentiveCompensationProgram


Allocated
Period End2021-06-302021-03-31
Value2.00.4
Percentage of AllocatedShareBasedCompensationExpense42.518.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:LeverageStockUnits oas:A2020IncentiveCompensationProgram0.00.0

oas:PerformanceShareUnitAwards, oas:A2020IncentiveCompensationProgram


Allocated
Period End2021-06-302021-03-31
Value1.00.3
Percentage of AllocatedShareBasedCompensationExpense21.313.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:PerformanceShareUnitAwards oas:A2020IncentiveCompensationProgram0.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Allocated
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.068-0.124-0.217-0.314-0.225-0.653-0.593-0.422-0.442-0.454-0.455
Percentage of AllocatedShareBasedCompensationExpense-1.4-2.5-3.2-4.3-2.7-7.3-6.6-5.5-5.9-6.2-6.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.1-0.1-0.1-0.0-0.1-0.1-0.1-0.1-0.1-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination0.10.30.30.00.20.70.70.00.50.60.7

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Allocated
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4.6861.6884.5024.8116.5966.9038.2468.5228.587.3457.1027.0126.454
Percentage of AllocatedShareBasedCompensationExpense99.776.893.198.496.995.497.695.695.295.695.395.195.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.20.51.72.91.71.41.71.61.51.21.31.41.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:ExplorationAndProduction1.40.62.13.92.00.01.91.81.70.01.41.61.5

us-gaap:OperatingSegments, oas:MidstreamServices


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0160.510.270.40.2030.4280.3810.3830.5150.4650.3250.4420.4090.37
Percentage of AllocatedShareBasedCompensationExpense0.323.2100.08.34.26.35.34.55.85.24.25.95.55.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.20.10.10.10.10.10.10.10.10.10.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:MidstreamServices0.00.71.00.70.50.80.00.81.01.00.01.31.31.3

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold us-gaap:ConsolidatedEntities, us-gaap:ProductOrService

us-gaap:CostOfGoodsAndServicesSold

srt:ParentCompany, oas:MidstreamServices


Cost
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.0590.00.00.00.00.00.00.00.00.00.00.0
Percentage of CostOfGoodsAndServicesSold100.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany oas:MidstreamServices2.70.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, oas:OtherServices


Cost
Period End2020-09-30
Value0.308
Percentage of CostOfGoodsAndServicesSold522.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany oas:OtherServices99.7

srt:ParentCompany, us-gaap:OilAndGasPurchased


Cost
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value470.00.00.00.00.00.00.00.00.00.00.0
Percentage of CostOfGoodsAndServicesSold80691.50.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax17.60.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany us-gaap:OilAndGasPurchased107.70.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

oas:MidstreamServices


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value232710118.16113151217167.5878.6527.6887.9856.6984.3013.263
Percentage of CostOfGoodsAndServicesSold0.00.00.018830.50.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.07.88.84.14.93.43.12.73.32.91.31.61.51.71.51.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:MidstreamServices42.245.540.623.623.523.20.025.933.734.80.027.726.228.60.022.921.0

oas:OtherServices


Cost
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.0210.3080.7294.9316.1518.4746.97
Percentage of CostOfGoodsAndServicesSold0.0522.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.41.31.31.61.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:OtherServices10.899.7184.182.469.174.166.6

us-gaap:OilAndGasPurchased


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value85487.357473385707810914943346577062217.9820
Percentage of CostOfGoodsAndServicesSold0.00.00.080591.50.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.713.66.117.519.922.014.716.320.726.072.28.411.414.914.37.13.17.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OilAndGasPurchased104.499.9101.8107.688.898.80.099.1100.2101.00.099.499.3104.3100.8102.498.6101.8

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value240204812341765261459473457522773404745308350272248265219203205205235217237214283234209203211154141130127112888062473433362226
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.257.667.786.3106.11356.894.998.186.490.7128.974.0148.865.180.689.497.995.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CostsAndExpenses us-gaap:ConsolidatedEntities

srt:ParentCompany


Costs
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2340.6730.5696.3089.0877.7897.4867.4967.2326.2426.7757.534
Percentage of CostsAndExpenses100.30.10.11.41.71.01.91.02.31.82.53.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax86.60.10.11.21.61.31.41.51.51.42.23.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany103.90.00.00.00.00.00.00.00.00.00.00.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-0.020.0834.3120.00.00.0-0.15-0.047-13.6510.00.00.00.0-0.124-13.793117.0160.00.00.00.0
Percentage of GainsLossesOnExtinguishmentOfDebt100.00.0100.0100.00.00.00.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.00.021.60.90.00.00.0-0.0-0.0-2.70.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:ConsolidatedEntities

srt:ParentCompany


Gains
Period End2020-09-302018-12-312018-09-302018-06-30
Value-0.02-0.15-0.047-13.651
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.0-0.0-2.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany-0.00.00.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:A2.625PercentSeniorNotesDueSeptember2023, us-gaap:UnsecuredDebt


Gains
Period End2020-09-302020-06-302020-03-312019-12-31
Value3.73.73.72.7
Percentage of GainsLossesOnExtinguishmentOfDebt-18500.00.04.462.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.42.21.00.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:A2.625PercentSeniorNotesDueSeptember2023 us-gaap:UnsecuredDebt0.00.00.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType

us-gaap:UnsecuredDebt


Gains
Period End2020-09-302020-06-302020-03-312019-12-31
Value0.00.0801.6
Percentage of GainsLossesOnExtinguishmentOfDebt-0.00.095.637.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.020.70.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:UnsecuredDebt0.00.00.00.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value20201449373125523034303428272122232323222124252221232423202328161613171313129.5657.3066.6145.957.6384.8483.743
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.15.811.918.222.58.05.210.95.86.05.16.45.65.95.07.49.38.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidatedEntities

srt:ParentCompany


General
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value440.6730.5696.3089.0877.7897.4867.4967.2326.2426.7757.534
Percentage of GeneralAndAdministrativeExpense89.72.71.120.426.425.721.526.625.928.530.132.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.30.10.11.21.61.31.41.51.51.42.23.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany19.60.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3.672-3.498-1.86-3.926-4.151-4.101-7.024-7.848-8.903-9.39-7.531-6.646-7.097-7.843
Percentage of GeneralAndAdministrativeExpense-18.2-16.9-13.1-8.0-11.1-13.2-27.8-14.8-28.8-27.2-24.8-19.1-25.1-28.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-1.0-1.6-1.4-2.5-1.1-1.5-1.6-1.7-1.6-1.3-1.2-1.4-1.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination8.78.510.97.211.26.00.08.39.311.60.08.08.711.2

us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1515124432261946252725302323
Percentage of GeneralAndAdministrativeExpense77.775.686.089.586.285.675.487.783.379.982.687.483.284.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.04.410.216.319.46.93.99.64.94.84.25.64.75.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:ExplorationAndProduction4.85.513.020.426.58.00.010.95.55.30.06.15.25.4

us-gaap:OperatingSegments, oas:MidstreamServices


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value8.1758.563.859.0899.3048.6027.0547.8427.988.8616.5935.6146.0796.414
Percentage of GeneralAndAdministrativeExpense40.541.327.118.524.827.627.914.825.825.721.716.121.523.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.12.43.23.45.62.21.51.61.51.51.11.01.21.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:MidstreamServices7.711.814.716.420.915.20.015.715.518.50.017.018.623.0

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value84-38.919-49.409-52.241-91.962-4589.013-88.0341263-111.68129691-417.3024.54-74.717-59.911839-86.408-50.633-142.429-92.0845.67447-84.075-25.41728219862271868810482682912126-21.62710553-11.0085.4437.5383.517
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.6-10.9-41.2-19.3-55.3-1183.4-18.22.712.0-19.449.416.7-83.21.0-17.2-19.77.414.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidatedEntities

srt:ParentCompany


Income
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-43.106-82.9522135-131.45521256-332.296-7.514210-53.266-1.665
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments82.594.2162.755.4117.771.661.779.6-165.5-282.188.9-8.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-15.9-17.14.46.6-22.835.410.3-66.3-1.648.5-17.5-0.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany-19.10.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-1.605-1.012-0.588-1.005-0.943-3.047-2.778-4.618-4.026-2.101-5.718-8.487-8.506-7.362-6.777-7.086-2.2491.953-0.155-1.9420.651-5.488-14.895-11.401-9.863-10.306-16.746-20.595-9.515-11.949-14.452-13.391
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments-1.92.61.21.91.00.13.2-35.7-6.31.9-1.9-9.32.0-162.29.111.8-11.94.90.23.8-0.56.0-262.5-24.011.740.5-5.9-10.4-15.3-4.4-16.6-15.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.4-0.3-0.5-0.4-0.6-0.8-0.6-1.0-0.8-0.4-1.0-1.6-1.7-1.6-1.6-2.3-0.90.70.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination3.82.43.41.82.54.40.04.94.22.60.010.210.510.50.011.84.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value57-82.716-68.499-96.556-116.366-4513.257-147.931-42.60514-156.45825659-454.662-28.184-107.13-88.835-3.920-105.394-66.333-158.978-105.764-14.86829-99.164-34.00827419053268927896796847120
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments67.8212.5138.6184.8126.598.3168.0-329.323.5140.186.465.2109.0-620.8143.4148.3-20.652.0122.0131.0111.6114.9-262.061.3117.9133.897.296.086.899.0106.288.692.496.399.8157.998.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.7-23.3-57.1-35.6-70.0-1163.8-30.6-8.82.8-27.242.710.9-90.7-5.9-24.6-29.2-1.57.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:ExplorationAndProduction17.5-29.3-73.0-44.8-95.5-1361.90.0-10.13.2-30.20.011.9-101.0-6.50.0-32.9-1.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, oas:MidstreamServices


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2844194525-72.709675951464030373133252320191618151518159.2896.8765.1261.3340.927-8.0044.2274.6810.505
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments34.1-115.1-39.8-86.8-27.61.6-76.4462.180.4-41.213.634.0-9.1704.4-44.6-42.0122.252.1-22.1-31.7-12.7-16.5279.039.7-18.9-36.52.42.62.10.3-9.24.84.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.412.616.416.715.2-18.713.912.49.68.06.75.77.56.77.78.39.17.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:MidstreamServices27.361.675.381.856.9-128.90.0119.598.995.90.093.7115.6114.50.0134.2148.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:PermianBasinSale


Income
Period End2021-06-302020-06-30
Value2382.3
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments281.2-2.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax60.81.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations oas:PermianBasinSale0.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.654-3.654-3.447-5.144-2.613-254.738-23.88-17.37212-3.7036924-101.0010.828-202.834-18.8462.33916-31.72-16.691-52.498-27.6291.70620-30.845-7.3761067623101323337312511459.822-8.2263820-4.1613.8569.23929
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.9-1.0-2.9-1.9-1.6-65.7-4.9-3.62.3-0.611.64.5-20.10.2-46.6-6.20.95.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidatedEntities

srt:ParentCompany


Income
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-5.144-6.5460.766-7.624-16.573-9.751-6.155-12.092-8.10486-12.052-18.233
Percentage of IncomeTaxExpenseBenefit100.027.4-4.4-62.3447.6-14.0-24.812.0-978.7-42.563.9-779.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.9-1.40.2-1.4-2.9-1.6-1.1-2.4-1.719.8-4.0-7.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany-2.30.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2020-12-31
Value1000.0
Percentage of IncomeTaxesPaid100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value228.6973.1683744954443434441394037363736363431343836363738393938404122212121201413106.7866.7615.1980.2740.2360.509
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.72.42.613.826.724.79.29.18.27.76.97.28.27.88.312.314.513.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestExpense us-gaap:ConsolidatedEntities

srt:ParentCompany


Interest
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value343333323232323332323233
Percentage of InterestExpense92.675.275.575.173.978.983.081.087.389.888.089.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.86.96.96.15.75.56.06.66.87.510.813.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany15.30.00.00.00.00.00.00.00.00.00.00.0

Interest Expense Debt

us-gaap:InterestExpenseDebt us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebt

us-gaap:RevolvingCreditFacility, oas:OMPRevolvingLineofCredit, us-gaap:LineOfCredit


Interest
Period End2020-09-302020-06-302020-03-31
Value0.02.125
Percentage of InterestExpenseDebt0.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.01.36.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RevolvingCreditFacility oas:OMPRevolvingLineofCredit us-gaap:LineOfCredit0.00.00.0

us-gaap:InterestExpenseDebt us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Interest
Period End2020-09-302020-06-30
Value0.01.0
Percentage of InterestExpenseDebt0.047.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RevolvingCreditFacility us-gaap:LineOfCredit0.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2020-12-31
Value2.411
Percentage of InterestPaidNet100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value73-43.592-49.912-55.699-92.943-4310.861-76.4062042-114.88222162-320.2040.59124-41.2141623-54.688-33.942-89.931-64.4553.96827-53.23-18.041176121381695454675142187616-13.4016633-6.8471.587-1.701-26.35
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.7-12.3-41.6-20.5-55.9-1111.6-15.84.28.1-20.037.011.4-63.90.128.7-13.56.58.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities

srt:ParentCompany


Net
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-38.048-76.4062042-114.88222162-320.2040.59124-41.21416
Percentage of NetIncomeLoss68.3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-14.0-15.84.28.1-20.037.011.4-63.90.128.7-13.56.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany-16.80.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value7.9458.3273.958.6023.594-23.41412108.4176.9044.8893.8823.9033.1223.50.150.00.00.00.0
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.33.33.22.2-6.02.52.11.61.20.80.70.80.70.80.00.00.00.00.0

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest us-gaap:ConsolidatedEntities

srt:ParentCompany


Net
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.0860.00.00.00.00.00.00.00.00.00.0
Percentage of NetIncomeLossAttributableToNoncontrollingInterest1.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.00.00.00.00.00.00.00.00.00.00.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-290.61-189.754-88.185-90.765-80.738273-112.04.498-8.158-162.125226-88.04-174.628-108.445-160.82-92.3041319-84.706-24.931-114.215-16.8695867-76.6388.21826663-104.425-57.608-35.211-62.648-8.507-35.015-18.256-42.27361-31.887-75.9636421-36.552-7.55-3.2932.869
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-73.9-53.4-73.5-33.5-48.570.5-23.10.9-1.5-28.237.8-16.1-34.8-22.9-37.0-30.35.37.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidatedEntities

srt:ParentCompany


Nonoperating
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-35.745-82.2792141-122.36822063-324.8-0.282216-46.4915.869
Percentage of NonoperatingIncomeExpense39.473.5480.7-508.075.597.0-72.3186.00.3-134.950.443.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-13.2-17.04.57.8-21.336.711.7-64.8-0.149.9-15.32.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany-15.80.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NonoperatingIncomeExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value-279.602-185.896-87.161-87.953-75.465303-107.3978.871-3.97-158.382228-87.594-174.572-108.146-160.796-92.3191319-84.695-24.476-114.23-16.8875967-76.6358.23926663-104.448-57.66-35.238-62.628-8.511-35.019-18.257-42.27361
Percentage of NonoperatingIncomeExpense96.298.098.896.993.5111.195.9197.248.797.7100.699.5100.099.7100.0100.0100.0100.0100.098.2100.0100.1101.3100.0100.0100.3100.0100.0100.0100.1100.1100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-71.1-52.3-72.7-32.4-45.478.4-22.21.8-0.7-27.538.0-16.0-34.8-22.8-37.0-30.35.37.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:ExplorationAndProduction-85.0-65.8-92.9-40.8-61.991.70.02.1-0.9-30.60.0-17.6-38.8-24.90.0-34.26.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, oas:MidstreamServices


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-11.008-3.858-1.024-2.812-5.273-30.483-4.605-4.512-4.2-3.748-1.422-0.367-0.079-0.258-0.024-0.0150.003-0.002-0.012-0.46-0.0160.013-0.7570.0-0.025-0.019
Percentage of NonoperatingIncomeExpense3.82.01.23.16.5-11.14.1-100.351.52.3-0.60.40.00.20.00.00.0-0.00.01.80.0-0.1-1.30.00.0-0.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.8-1.1-0.9-1.0-3.2-7.9-1.0-0.9-0.8-0.7-0.2-0.1-0.0-0.1-0.0-0.00.0-0.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:MidstreamServices-10.4-5.3-3.9-5.1-11.8-54.00.0-9.0-8.1-7.80.0-1.1-0.2-0.90.0-0.10.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value3751503838-11.224-4862.528238.441715069179-242.67411286325.37920-1.702-25.702-28.214-75.215-53.166-19.926-7.437-33.63515134166329122150113117867260585440322512100.648-2.479
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax95.642.432.314.2-6.7-1253.95.01.713.58.811.632.8-48.423.819.810.62.17.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:ConsolidatedEntities

srt:ParentCompany


Operating
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-7.361-0.673-0.569-6.308-9.087-7.789-7.486-7.496-7.232-6.242-6.775-7.534
Percentage of OperatingIncomeLoss-19.1-2.8-6.7-8.8-18.0-11.2-4.23.1-6.4-7.2-20.9-140.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.7-0.1-0.1-1.2-1.6-1.3-1.4-1.5-1.5-1.4-2.2-3.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany-3.30.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-1.605-1.012-0.588-1.005-0.943-3.047-2.778-4.618-4.026-2.101-5.718-8.487-8.506-7.362-6.777-7.086-2.2491.953-0.155-1.9420.651-5.488-14.895-11.401-9.863-10.306-16.746-20.595-9.515-11.949-14.452-13.391
Percentage of OperatingIncomeLoss-0.4-0.7-1.5-2.68.40.1-11.6-54.7-5.6-4.2-8.2-4.73.5-6.5-7.9-21.9-41.89.79.17.6-2.37.328.057.2132.630.6-105.2-15.4-5.7-3.6-11.8-8.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.4-0.3-0.5-0.4-0.6-0.8-0.6-1.0-0.8-0.4-1.0-1.6-1.7-1.6-1.6-2.3-0.90.70.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination3.82.43.41.82.54.40.04.94.22.60.010.210.510.50.011.84.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value33710318-8.603-40.901-4817.255-40.534-51.476181.92428146-280.0979533.484-17.4250.968-20.699-41.857-44.748-88.877-74.447-38.289-22.529-42.2478.053126158326127140105114868958
Percentage of OperatingIncomeLoss89.868.448.1-22.3364.499.1-169.1-609.826.43.840.482.1115.470.862.310.8-323.94.81216.2162.9158.6118.2140.0192.2302.9125.650.694.195.199.2104.593.393.097.499.8123.997.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax85.829.015.6-3.2-24.6-1242.2-8.4-10.73.60.34.726.9-55.916.912.31.1-6.90.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:ExplorationAndProduction102.536.519.9-4.0-33.6-1453.70.0-12.14.10.40.029.6-62.218.40.01.3-7.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, oas:MidstreamServices


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3948204830-42.226716455494131373233252320191618151618159.3086.8765.1261.3340.927-8.0044.2274.6810.505
Percentage of OperatingIncomeLoss10.632.353.4124.9-272.80.9299.8761.777.198.759.817.5-15.628.538.777.8429.5103.3-1124.8-64.3-64.0-20.1-31.2-94.5-214.4-27.743.23.80.80.3-6.62.84.10.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.213.717.317.818.4-10.914.813.310.48.76.95.77.66.87.78.39.17.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:MidstreamServices37.766.979.386.868.8-74.90.0128.5107.0103.70.094.9115.8115.50.0134.2148.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-1002000.0458000.0-402000.01473000.0837000.063000.0-266000.0473000.0279000.0-46000.0-25000.0111000.0218000.0-183000.0-577000.0-605000.0-166000.016000.0-28000.0-259000.0-32000.0479000.0-3305000.0249000.0191000.0-70000.0-55000.0-38000.0135000.0153000.0119000.023000.0294000.0780000.02339000.01147000.0776000.0598000.0420000.0524000.0379000.0312000.0202000.067000.012000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.30.1-0.30.50.50.0-0.10.10.1-0.0-0.00.00.0-0.0-0.1-0.2-0.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherNonoperatingIncomeExpense us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1480000.01000.01000.01000.001000.0000-1000.02000.00
Percentage of OtherNonoperatingIncomeExpense100.5-0.40.20.4-0.0-4.00.00.0-0.00.2-0.3-0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.00.00.00.00.00.00.00.0-0.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany0.70.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value81-35.265-45.962-47.097-89.349-4334.275-64.1543051-107.97822666-316.3013.712128-41.0641623-54.688-33.942-89.931-64.455-13.4016633-6.8471.587-1.701-26.35-3.231
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.7-9.9-38.3-17.4-53.7-1117.7-13.36.39.7-18.837.812.1-63.10.829.5-13.56.58.60.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:ConsolidatedEntities

srt:ParentCompany


Profit
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-37.962-76.4062042-114.88222162-320.2040.59124-41.214
Percentage of ProfitLoss80.6119.166.983.6106.497.894.1101.215.997.3100.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-14.0-15.84.28.1-20.037.011.4-63.90.128.7-13.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany-16.80.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value7.9458.3273.958.6023.594-23.414108.4176.9044.8893.8823.9033.1223.5
Percentage of ProfitLoss9.8-23.6-8.6-18.3-4.00.533.116.4-6.42.25.9-1.284.12.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.33.33.22.2-6.02.11.61.20.80.70.80.70.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value73-43.592-49.912-55.699-92.943-4310.8612042-114.88222162-320.2040.59124
Percentage of ProfitLoss90.2123.6108.6118.3104.099.566.983.6106.497.894.1101.215.997.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.7-12.3-41.6-20.5-55.9-1111.64.28.1-20.037.011.4-63.90.128.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value393355119271166387483482529575599546501473434304254277
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidatedEntities

srt:ParentCompany


Revenue
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2250.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax83.30.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax83.30.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany100.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidatedEntities, us-gaap:ProductOrService

srt:ParentCompany, oas:MidstreamServices


Revenue
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2.1680.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.80.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany oas:MidstreamServices100.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, oas:OtherServices


Revenue
Period End2020-09-30
Value0.309
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany oas:OtherServices100.0

srt:ParentCompany, us-gaap:OilAndGas


Revenue
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1790.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.10.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax66.10.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany us-gaap:OilAndGas100.00.00.00.00.00.00.00.00.00.00.00.0

srt:ParentCompany, us-gaap:OilAndGasPurchased


Revenue
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value440.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.30.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.30.00.00.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany us-gaap:OilAndGasPurchased100.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-42.09-41.356-17.136-54.638-37.195-68.544-84.556-94.899-95.686-80.734-73.056-82.922-81.128-69.942-63.69-59.918-46.396
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.7-11.6-14.3-20.2-22.4-17.7-17.5-19.7-18.1-14.0-12.2-15.2-16.2-14.8-14.6-19.7-18.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.7-11.6-14.3-20.2-22.4-17.7-17.5-19.7-18.1-14.0-12.2-15.2-16.2-14.8-14.6-19.7-18.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments


Revenue
Period End2021-03-312020-03-31
Value355387
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:MajorCustomers, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExternalCustomers, oas:ExplorationAndProduction


Revenue
Period End2020-12-31
Value93
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax78.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:ExternalCustomers oas:ExplorationAndProduction100.0

us-gaap:OperatingSegments, oas:ExternalCustomers, oas:MidstreamServices


Revenue
Period End2020-12-31
Value26
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:ExternalCustomers oas:MidstreamServices100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:CrudeOilandNaturalGasServices, oas:MidstreamServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value8.91222222626212224181817181411
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.48.413.86.95.44.54.34.33.23.33.63.83.23.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.48.413.86.95.44.54.34.33.23.33.63.83.23.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:CrudeOilandNaturalGasServices oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:NaturalGasAndNaturalGasLiquids, oas:ExplorationAndProduction


Revenue
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value24122625295040
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.07.76.85.45.58.87.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.07.76.85.45.58.87.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:NaturalGasAndNaturalGasLiquids oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:NaturalGasLiquidServices, oas:ExplorationAndProduction


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-06-302018-03-31
Value0.2150.3090.3965.981118.89819231113
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.21.52.31.83.64.02.32.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.21.52.31.83.64.02.32.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:NaturalGasLiquidServices oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:NaturalGasandNGLServices, oas:MidstreamServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value13154.33516241617121.4640.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.05.62.64.15.03.43.32.20.20.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.05.62.64.15.03.43.32.20.20.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:NaturalGasandNGLServices oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:OperatingSegments, oas:OilProduction, oas:ExplorationAndProduction


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6915581212296318327318321414363326
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax57.657.248.754.961.366.062.055.353.775.872.468.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax57.657.248.754.961.366.062.055.353.775.872.468.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:OilProduction oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:ProducedandFlowbackWaterService, oas:MidstreamServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.5128.8017.2471111109.4739.0339.8729.9859.0588.876
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.93.24.42.92.32.21.81.61.61.81.81.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.93.24.42.92.32.21.81.61.61.81.81.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:ProducedandFlowbackWaterService oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:PurchasedGasSales, oas:ExplorationAndProduction


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.3660.3084.0810.5210.6172.3342.921.3353.9171.6160.4960.049
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.12.50.10.10.50.60.20.70.30.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.30.12.50.10.10.50.60.20.70.30.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:PurchasedGasSales oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:PurchasedOilSales, oas:ExplorationAndProduction


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.771352385707710614717616912767
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.613.114.122.114.716.020.125.629.431.025.414.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.613.114.122.114.716.020.125.629.431.025.414.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:PurchasedOilSales oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:PurchasedOilSales, oas:MidstreamServices


Revenue
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-30
Value0.098.4449.7520.0020.00.028-1.5791.8380.3560.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.13.15.90.00.00.0-0.30.30.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.13.15.90.00.00.0-0.30.30.10.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:PurchasedOilSales oas:MidstreamServices100.0100.0100.0100.00.0100.0100.0100.0100.00.00.0

us-gaap:OperatingSegments, oas:TotalMidstreamProducts, oas:MidstreamServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value13231418251719144.7174.8522.7331.017
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.48.88.64.75.23.63.62.50.80.90.50.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.48.88.64.75.23.63.62.50.80.90.50.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:TotalMidstreamProducts oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:TotalMidstreamServicesProductandServicesMember, oas:MidstreamServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value123130383732323328282626
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.411.618.19.87.76.76.15.94.85.25.45.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.411.618.19.87.76.76.15.94.85.25.45.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:TotalMidstreamServicesProductandServicesMember oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:WaterServices, oas:MidstreamServices


Revenue
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.4570.3960.2942.20.9511.1431.9061.527-26.106122.3771.017-20.9357.155
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.10.20.60.20.20.40.3-4.42.40.50.2-4.82.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.10.20.60.20.20.40.3-4.42.40.50.2-4.82.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:WaterServices oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:NaturalGasProduction, oas:ExplorationAndProduction


Revenue
Period End2020-12-312019-06-302019-03-312018-06-302018-03-31
Value179.734272326
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.51.84.84.65.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.51.84.84.65.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments us-gaap:NaturalGasProduction oas:ExplorationAndProduction100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination, oas:MidstreamServices


Revenue
Period End2021-06-302020-06-30
Value-42.09-37.195
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.7-22.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-10.7-22.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:IntersegmentElimination oas:MidstreamServices100.0100.0

us-gaap:MaterialReconcilingItems, oas:MidstreamServices


Revenue
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value41175437687673675843423936362824
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.614.320.222.417.715.815.212.810.27.27.87.97.78.49.59.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax11.614.320.222.417.715.815.212.810.27.27.87.97.78.49.59.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MaterialReconcilingItems oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value32828293215121331410423466517807497450434406269226
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax83.779.578.279.673.285.584.887.888.189.8134.791.089.891.793.588.589.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax83.779.578.279.673.285.584.887.888.189.8134.791.089.891.793.588.589.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:MidstreamServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value10672265544566250514830333227231815
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.020.521.820.426.814.512.910.49.78.35.16.06.55.95.56.26.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax27.020.521.820.426.814.512.910.49.78.35.16.06.55.95.56.26.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OperatingSegments oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:MajorCustomers

oas:ExternalCustomers


Revenue
Period End2020-12-31
Value119
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:ExternalCustomers100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

oas:MidstreamServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value5561264634566250514830312927231815
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.217.221.717.320.914.512.910.49.78.35.15.75.95.95.56.26.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.217.221.717.320.914.512.910.49.78.35.15.75.95.95.56.26.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:OtherServices


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.1950.2260.3090.3965.9818.8981110
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.10.21.51.82.21.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.10.21.51.82.21.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:OtherServices100.0100.0100.0100.0100.0100.0100.0100.0

oas:WellServicing


Revenue
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.215118.898111014161811191611
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.22.31.82.21.82.53.03.72.44.45.34.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.22.31.82.21.82.53.03.72.44.45.34.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:WellServicing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OilAndGas


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2552458617993239338344357368377452395366330248218237
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.969.172.166.356.461.770.071.467.464.163.082.879.077.476.081.686.085.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax64.969.172.166.356.461.770.071.467.464.163.082.879.077.476.081.686.085.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OilAndGas100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OilAndGasPurchased


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value81487.227443786717910914842946576761218.09120
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.813.66.016.322.522.214.816.420.725.871.78.511.514.314.27.03.27.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.813.66.016.322.522.214.816.420.725.871.78.511.514.314.27.03.27.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:OilAndGasPurchased100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

oas:CrudeOilandNaturalGasServices, oas:MidstreamServices


Revenue
Period End2021-06-302021-03-312020-06-302020-03-312018-06-302018-03-312017-06-302017-03-31
Value2022222617183.1878.551
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.36.313.86.93.63.81.33.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.36.313.86.93.63.81.33.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:CrudeOilandNaturalGasServices oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0

oas:NaturalGasAndNaturalGasLiquids, oas:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value48591226
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.316.87.76.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.316.87.76.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:NaturalGasAndNaturalGasLiquids oas:ExplorationAndProduction100.0100.0100.0100.0

oas:NaturalGasLiquidServices, oas:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.1950.2260.3965.9811213111312109.5099.124
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.21.52.12.52.32.82.93.53.73.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.10.21.52.12.52.32.82.93.53.73.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:NaturalGasLiquidServices oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:NaturalGasandNGLServices, oas:MidstreamServices


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value26314.33516
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.88.82.64.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.88.82.64.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:NaturalGasandNGLServices oas:MidstreamServices100.0100.0100.0100.0

oas:OilProduction, oas:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value20618581212328412361323289221194208
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax52.652.348.754.954.775.572.168.366.572.576.475.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax52.652.348.754.954.775.572.168.366.572.576.475.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:OilProduction oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:ProducedandFlowbackWaterService, oas:MidstreamServices


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.4667.417.24711
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.92.14.42.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.92.14.42.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:ProducedandFlowbackWaterService oas:MidstreamServices100.0100.0100.0100.0

oas:PurchasedGasSales, oas:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.060.2954.0810.5213.9171.6160.4960.0490.5630.4620.1860.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.12.50.10.70.30.10.00.10.20.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.12.50.10.70.30.10.00.10.20.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:PurchasedGasSales oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

oas:PurchasedOilSales, oas:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-06-302020-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7336238542642531776207.90527
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.710.314.122.171.07.910.73.817.56.83.19.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.710.314.122.171.07.910.73.817.56.83.19.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:PurchasedOilSales oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:PurchasedOilSales, oas:MidstreamServices


Revenue
Period End2021-06-302021-03-312020-06-302018-06-302017-06-30
Value8.29119.7523.3750.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.13.25.90.70.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.13.25.90.70.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:PurchasedOilSales oas:MidstreamServices100.0100.0100.0100.00.0

oas:TotalMidstreamProducts, oas:MidstreamServices


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value35431418
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.112.18.64.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.112.18.64.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:TotalMidstreamProducts oas:MidstreamServices100.0100.0100.0100.0

oas:TotalMidstreamServicesProductandServicesMember, oas:MidstreamServices


Revenue
Period End2021-06-302021-03-312020-06-302020-03-31
Value28293038
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.28.318.19.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.28.318.19.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:TotalMidstreamServicesProductandServicesMember oas:MidstreamServices100.0100.0100.0100.0

oas:WaterServices, oas:MidstreamServices


Revenue
Period End2021-06-302021-03-312020-06-302020-03-312018-06-302018-03-312017-06-302017-03-31
Value0.7410.4960.2942.2119.893126.055
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.20.62.32.14.92.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.10.20.62.32.14.92.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:WaterServices oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementBusinessSegments

oas:ExplorationAndProduction


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value32828293215121331410423466517807497450381406269226264
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax83.779.578.279.673.285.584.887.888.189.8134.791.089.880.693.588.589.295.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax83.779.578.279.673.285.584.887.888.189.8134.791.089.880.693.588.589.295.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:MidstreamServices


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value6411443110811241381231191067375322760471514
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.332.136.140.649.132.228.725.622.618.512.313.96.55.913.815.66.15.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax16.332.136.140.649.132.228.725.622.618.512.313.96.55.913.815.66.15.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value393355119271166387483482529575599546501473434304254277
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2936229721592237243325062625286974997666771076467626741674657638661563916261618961785398543555605649572557835916593854575036479247114083275826462528248020361813172713141180691
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

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value188256375733571656595773551754585400
Percentage of Assets75.175.274.874.174.075.774.473.181.6
Percentage of Assets75.175.274.874.174.075.774.473.181.6
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312012-12-31
Value-2.13-0.786-0.276-43.981-43.392-932.855-195.749-191.991-187.742-968.624-181.614-175.706-167.408-158.903-151.539-181.051-172.673-170.425-172.377-172.223-170.28-170.931-709.313-616.492-532.014-437.442-358.412-256.64-76.216-28.445
Percentage of Assets-0.1-0.0-0.0-1.8-1.7-32.5-2.6-2.5-2.4-12.7-2.4-2.4-2.2-2.1-2.3-2.8-2.8-2.8-2.8-3.2-3.1-3.1-12.6-10.8-9.2-7.4-6.0-4.7-1.6-1.1
Percentage of Assets-0.1-0.0-0.0-1.8-1.7-32.5-2.6-2.5-2.4-12.7-2.4-2.4-2.2-2.1-2.3-2.8-2.8-2.8-2.8-3.2-3.1-3.1-12.6-10.8-9.2-7.4-6.0-4.7-1.6-1.1
Percentage of Assets us-gaap:IntersegmentElimination100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value189412441093149916101722656767366804679568386675676769946050593058815871586851205191536754785541559957585802534448444603453239162475
Percentage of Assets64.554.250.659.861.360.087.687.988.388.989.790.090.791.691.592.893.994.995.094.995.596.597.096.896.897.397.797.996.296.196.295.997.9
Percentage of Assets64.554.250.659.861.360.087.687.988.388.989.790.090.791.691.592.893.994.995.094.995.596.597.096.896.897.397.797.996.296.196.295.997.9
Percentage of Assets us-gaap:OperatingSegments oas:ExplorationAndProduction100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, oas:MidstreamServices


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value104410531066105010582080110110881057191592086781675266358950444043139635630140937833026521215711511110897
Percentage of Assets35.645.949.441.940.372.514.714.213.725.112.111.710.99.810.09.28.17.17.07.36.65.47.36.65.74.53.62.92.32.32.32.4
Percentage of Assets35.645.949.441.940.372.514.714.213.725.112.111.710.99.810.09.28.17.17.07.36.65.47.36.65.74.53.62.92.32.32.32.4
Percentage of Assets us-gaap:OperatingSegments oas:MidstreamServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Assetsus-gaap:
Period End2020-11-19
Value-144.939
Percentage of Assets-6.5
Percentage of Assets-6.5
Percentage of Assets oas:FreshStartAdjustments100.0

oas:ReorganizationAdjustments


Assetsus-gaap:
Period End2020-11-19
Value-50.825
Percentage of Assets-2.3
Percentage of Assets-2.3
Percentage of Assets oas:ReorganizationAdjustments100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value19141335114611793160314432153369366237673843383537073772389137523101333232843236325530103075311533303415350735924066376734723272336331071838179717331730130611621093667601140
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 Assets65.258.153.152.7129.9125.5122.5117.448.849.149.950.248.650.952.149.146.952.152.452.352.755.856.656.058.959.760.660.768.569.068.968.371.476.166.767.968.669.864.264.163.350.850.920.2

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value266720012028203920212029200620182023
Percentage of Liabilities84.854.753.853.152.754.753.251.965.2
Percentage of Assets106.426.726.526.526.426.627.027.030.6
Percentage of Assets srt:ParentCompany141.735.535.435.735.735.236.437.037.5

us-gaap:Liabilities us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Liabilitiesus-gaap:
Period End2020-11-19
Value-18.916
Percentage of Liabilities-1.6
Percentage of Assets-0.8
Percentage of Assets oas:FreshStartAdjustments13.1

oas:ReorganizationAdjustments


Liabilitiesus-gaap:
Period End2020-11-19
Value-1961.893
Percentage of Liabilities-166.3
Percentage of Assets-87.7
Percentage of Assets oas:ReorganizationAdjustments3860.1

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2936229721592237243325062625286974997666771076467626741674657638661563916261618961785398543555605649572557835916593854575036479247114083275826462528248020361813172713141180691
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

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value188256375733571656595773551754585400
Percentage of LiabilitiesAndStockholdersEquity75.175.274.874.174.075.774.473.181.6
Percentage of Assets75.175.274.874.174.075.774.473.181.6
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Liabilities
Period End2020-11-19
Value-144.939
Percentage of LiabilitiesAndStockholdersEquity-6.5
Percentage of Assets-6.5
Percentage of Assets oas:FreshStartAdjustments100.0

oas:ReorganizationAdjustments


Liabilities
Period End2020-11-19
Value-50.825
Percentage of LiabilitiesAndStockholdersEquity-2.3
Percentage of Assets-2.3
Percentage of Assets oas:ReorganizationAdjustments100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value836864915965-897.167-810.015-759.124-670.739363637053676362437343505343637483375294229772953292323872360244423192309227623241872169015641519134897591984979575072965163464657955117182
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.537.642.443.1-36.9-32.3-28.9-23.448.548.347.747.449.047.346.049.151.046.047.647.747.344.243.444.041.140.339.439.331.531.031.131.728.623.933.332.131.430.235.835.936.749.249.179.80.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-785.56936363705367636373744351134403377
Percentage of StockholdersEquity97.0100.0100.0100.0100.3100.3100.2100.1100.1
Percentage of Assets-31.348.548.347.747.649.147.446.151.1
Percentage of Assets srt:ParentCompany-41.764.564.664.364.364.863.663.062.5

us-gaap:StockholdersEquity us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Stockholders
Period End2020-11-19
Value-39.192
Percentage of StockholdersEquity-4.1
Percentage of Assets-1.8
Percentage of Assets oas:FreshStartAdjustments27.0

oas:ReorganizationAdjustments


Stockholders
Period End2020-11-19
Value1901
Percentage of StockholdersEquity197.0
Percentage of Assets85.0
Percentage of Assets oas:ReorganizationAdjustments-3742.2

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value7324222713393943394186544374954715215544834244184073222902692382222263263653633775466965314434474471423416440492641442455623425505205
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 Assets24.918.412.615.216.213.516.022.85.86.56.16.87.36.55.75.56.25.04.64.33.94.14.25.96.56.46.59.211.79.78.89.39.534.915.116.619.525.921.725.136.132.442.829.8

us-gaap:AssetsCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Assets
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value321499549585598643654329426
Percentage of AssetsCurrent94.7114.3110.9124.2114.7116.2135.377.4104.5
Percentage of Assets12.86.77.27.67.88.48.84.46.4
Percentage of Assets srt:ParentCompany17.18.99.610.210.611.211.96.07.9

us-gaap:AssetsCurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Assets
Period End2020-11-19
Value2.102
Percentage of AssetsCurrent0.6
Percentage of Assets0.1
Percentage of Assets oas:FreshStartAdjustments-1.5

oas:ReorganizationAdjustments


Assets
Period End2020-11-19
Value-57.842
Percentage of AssetsCurrent-17.1
Percentage of Assets-2.6
Percentage of Assets oas:ReorganizationAdjustments113.8

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value388113158.7547484771342019201522161717168.488111311136.475199.731213104567265691125161165213280238287470163300354143269326401.57
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.24.90.70.43.03.42.94.70.30.30.30.20.30.20.20.20.30.10.20.20.20.30.10.30.20.20.20.20.81.20.51.22.03.15.96.38.411.311.715.827.312.425.40.020.70.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312015-12-31
Value490.1460.1450.1440.1440.1790.170.1750.1780.1780.1780.1660.777
Percentage of CashAndCashEquivalentsAtCarryingValue58.80.70.70.70.90.81.01.01.12.11.61.58.0
Percentage of Assets2.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany2.60.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:ReorganizationAdjustments


Cash
Period End2020-11-19
Value-65.317
Percentage of CashAndCashEquivalentsAtCarryingValue-746.1
Percentage of Assets-2.9
Percentage of Assets oas:ReorganizationAdjustments128.5

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-11-192020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value7881132020847713420192015221617171611
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets26.94.90.90.93.42.94.70.30.30.30.20.30.20.20.20.30.2

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value490.1460.1450.1440.1440.1790.170.1750.1790.1780.166
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents58.80.70.70.70.90.81.01.01.01.11.5
Percentage of Assets2.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany2.60.00.00.00.00.00.00.00.00.00.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3022682062742742022012203713813964563874283783703632852182262041031099296101134112130191216202175155130132110104797852402825
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 Assets10.311.79.612.311.38.17.77.74.95.05.16.05.15.85.14.95.54.53.53.73.31.92.01.71.71.82.31.92.23.54.34.23.73.84.75.04.44.23.94.33.03.12.43.7

us-gaap:AccountsReceivableNetCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Accounts
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1970.00.00.00.00.00.00.00.0
Percentage of AccountsReceivableNetCurrent97.80.00.00.00.00.00.00.00.0
Percentage of Assets7.90.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany10.50.00.00.00.00.00.00.00.0

Receivables Net Current

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


Receivables
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value206371387363204197
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0
Percentage of Assets9.64.95.15.53.33.5

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3229333533353633353630363331232319171714108.5139.01810111217212124171920181625202119103.5432.8131.0411.323
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.31.61.61.41.41.41.10.50.50.40.50.40.40.30.30.30.30.30.20.20.20.20.20.20.20.30.40.40.50.40.40.40.40.61.00.80.91.00.60.20.20.10.2

us-gaap:InventoryNet us-gaap:ConsolidatedEntities

srt:ParentCompany


Inventory
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value270.00.00.00.00.00.00.00.0
Percentage of InventoryNet77.40.00.00.00.00.00.00.00.0
Percentage of Assets1.10.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany1.50.00.00.00.00.00.00.00.0

us-gaap:InventoryNet us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Inventory
Period End2020-11-19
Value2.102
Percentage of InventoryNet5.9
Percentage of Assets0.1
Percentage of Assets oas:FreshStartAdjustments-1.5

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2892000.03002000.0727000.0754000.0754000.01780000.01667000.0270000.0346000.0332000.0195000.0309000.0183000.0192000.082000.0193000.0193000.065000.062000.04452000.04355000.04290000.04164000.046000.050000.01010000.01001000.01000000.06526000.01972000.0421000.0420000.0391000.0473000.05000.01134000.0335000.078000.01000.080000.0491000.0337000.0211000.00
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.10.10.00.00.00.10.10.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.00.00.00.00.00.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherAssetsCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value101000.000000000
Percentage of OtherAssetsCurrent5.70.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value815617857985608521855637643624341632333036285926912688253423882252212619951866175216271509146613381215109293382372363758951444639132026121517614812799
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.82.40.8352.5341.5324.5298.250.247.344.342.339.838.636.135.238.337.436.034.332.334.632.229.326.725.623.120.518.417.116.315.113.514.418.716.915.512.912.811.910.211.310.814.3

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:ConsolidatedEntities

srt:ParentCompany


Accumulated
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value83280.00.00.00.00.00.00.00.0
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment97.30.00.00.00.00.00.00.00.0
Percentage of Assets332.20.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany442.50.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:FairValueByMeasurementBasis, us-gaap:PropertyPlantAndEquipmentByType

us-gaap:CarryingReportedAmountFairValueDisclosure, oas:ProvedOilAndGasProperties


Accumulated
Period End2020-11-19
Value8259
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment0.0
Percentage of Assets369.1
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure oas:ProvedOilAndGasProperties0.0

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Accumulated
Period End2020-11-19
Value-8579.696
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment0.0
Percentage of Assets-383.4
Percentage of Assets oas:FreshStartAdjustments5919.5

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value15541719172817331988211521522148697770897169705670276900675771866173603559315896591951525186517752185307535653295186487445494297407926132305217720061803154913391079849663483
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 Assets52.974.980.177.581.784.482.074.993.092.593.092.392.193.090.594.193.394.494.795.395.895.595.493.192.492.792.690.187.389.390.389.786.664.083.682.379.472.776.173.862.564.656.269.9

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidatedEntities

srt:ParentCompany


Property
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value11950.00.00.00.00.00.00.00.0
Percentage of PropertyPlantAndEquipmentNet56.50.00.00.00.00.00.00.00.0
Percentage of Assets47.70.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany63.50.00.00.00.00.00.00.00.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-2.13-0.786-0.276-43.981-43.392-42.812-230.749-226.991-222.741-218.714-216.613-210.895-202.407-193.902-186.539-181.051-172.673-170.425-172.377-172.223-170.28-170.931-165.427-150.533-139.132-129.27-118.963
Percentage of PropertyPlantAndEquipmentNet-0.1-0.0-0.0-2.1-2.0-2.0-3.3-3.2-3.1-3.1-3.1-3.1-3.0-2.7-3.0-3.0-2.9-2.9-2.9-3.3-3.3-3.3-3.2-2.8-2.6-2.4-2.3
Percentage of Assets-0.1-0.0-0.0-1.8-1.7-1.5-3.1-3.0-2.9-2.9-2.8-2.8-2.7-2.5-2.8-2.8-2.8-2.8-2.8-3.2-3.1-3.1-2.9-2.6-2.4-2.2-2.0
Percentage of Assets us-gaap:IntersegmentElimination100.0100.0100.0100.0100.04.6117.9118.2118.622.6119.3120.0120.9122.0123.1100.0100.0100.0100.0100.0100.0100.023.324.426.229.633.2

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value670836837119712191205612762366336629263116227612966005663559555675589562048834951499450575130517951945074
Percentage of PropertyPlantAndEquipmentNet43.148.748.456.656.656.187.888.088.489.289.890.390.791.891.792.793.994.894.994.895.596.596.996.796.797.597.8
Percentage of Assets22.836.438.847.846.442.081.781.382.282.382.884.082.186.485.687.688.990.391.090.591.189.889.589.689.587.885.5
Percentage of Assets us-gaap:OperatingSegments oas:ExplorationAndProduction35.467.276.679.875.770.093.392.693.192.692.393.390.694.493.694.494.795.295.895.495.493.092.392.692.590.287.5

us-gaap:OperatingSegments, oas:MidstreamServices


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value886883892962976985107810521024949893841786732649577495433424391351295264261245207172
Percentage of PropertyPlantAndEquipmentNet57.051.451.645.545.445.915.514.814.313.412.712.211.610.210.59.68.37.47.27.66.85.75.14.94.63.93.3
Percentage of Assets30.238.541.338.437.234.414.413.713.312.411.711.410.59.69.89.07.97.06.97.26.55.34.74.64.33.52.9
Percentage of Assets us-gaap:OperatingSegments oas:MidstreamServices84.983.983.791.692.247.498.096.796.949.597.097.196.397.497.998.098.298.598.498.698.598.264.769.374.378.281.1

us-gaap:PropertyPlantAndEquipmentNet us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Property
Period End2020-11-19
Value1988
Percentage of PropertyPlantAndEquipmentNet114.7
Percentage of Assets88.8
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure0.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Property
Period End2020-11-19
Value1733
Percentage of PropertyPlantAndEquipmentNet100.0
Percentage of Assets77.5
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure0.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:FairValueByMeasurementBasis, us-gaap:PropertyPlantAndEquipmentByType

us-gaap:CarryingReportedAmountFairValueDisclosure, oas:ProvedOilAndGasProperties


Property
Period End2020-11-19
Value822
Percentage of PropertyPlantAndEquipmentNet47.5
Percentage of Assets36.8
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure oas:ProvedOilAndGasProperties0.0

us-gaap:EstimateOfFairValueFairValueDisclosure, oas:ProvedOilAndGasProperties


Property
Period End2020-11-19
Value755
Percentage of PropertyPlantAndEquipmentNet43.6
Percentage of Assets33.7
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure oas:ProvedOilAndGasProperties0.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Property
Period End2020-11-19
Value-254.657
Percentage of PropertyPlantAndEquipmentNet-14.7
Percentage of Assets-11.4
Percentage of Assets oas:FreshStartAdjustments175.7

Goodwill

us-gaap:Goodwill us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

us-gaap:Goodwill

oas:FreshStartAdjustments


Goodwillus-gaap:
Period End2020-11-19
Value70
Percentage of Goodwill100.0
Percentage of Assets3.2
Percentage of Assets oas:FreshStartAdjustments-48.7

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill


Indefinite
Period End2020-12-312019-12-31
Value280.7
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0
Percentage of Assets1.30.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182018-12-312017-12-31
Value424243430.6670.1250.0
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.41.92.02.00.00.00.0

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Intangible
Period End2020-11-19
Value0.667
Percentage of IntangibleAssetsNetExcludingGoodwill1.5
Percentage of Assets0.0
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure0.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Intangible
Period End2020-11-19
Value43
Percentage of IntangibleAssetsNetExcludingGoodwill100.0
Percentage of Assets2.0
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure0.0

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FairValueByMeasurementBasis, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:TechnologyBasedIntangibleAssets


Intangible
Period End2020-11-19
Value0.667
Percentage of IntangibleAssetsNetExcludingGoodwill1.5
Percentage of Assets0.0
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure us-gaap:TechnologyBasedIntangibleAssets0.0

us-gaap:EstimateOfFairValueFairValueDisclosure, oas:InterestInOMPGP


Intangible
Period End2020-11-19
Value28
Percentage of IntangibleAssetsNetExcludingGoodwill64.1
Percentage of Assets1.3
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure oas:InterestInOMPGP0.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:CustomerContracts


Intangible
Period End2020-12-31
Value15
Percentage of IntangibleAssetsNetExcludingGoodwill34.4
Percentage of Assets0.7
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure us-gaap:CustomerContracts0.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:TechnologyBasedIntangibleAssets


Intangible
Period End2020-11-19
Value0.667
Percentage of IntangibleAssetsNetExcludingGoodwill1.5
Percentage of Assets0.0
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure us-gaap:TechnologyBasedIntangibleAssets0.0

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Intangible
Period End2020-11-19
Value43
Percentage of IntangibleAssetsNetExcludingGoodwill98.5
Percentage of Assets1.9
Percentage of Assets oas:FreshStartAdjustments-29.7

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2020-12-31
Value15
Percentage of FiniteLivedIntangibleAssetsNet100.0
Percentage of Assets0.7

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.9515.4866.083121313151618212024
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.30.60.50.50.60.60.20.30.30.3

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:ConsolidatedEntities

srt:ParentCompany


Operating
Period End2020-09-302019-12-312019-09-302019-06-302019-03-31
Value110.00.00.00.0
Percentage of OperatingLeaseRightOfUseAsset85.70.00.00.00.0
Percentage of Assets0.40.00.00.00.0
Percentage of Assets srt:ParentCompany0.60.00.00.00.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Operating
Period End2020-11-19
Value-0.797
Percentage of OperatingLeaseRightOfUseAsset-6.4
Percentage of Assets-0.0
Percentage of Assets oas:FreshStartAdjustments0.5

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value9017181821222327292930292520202021211920202222232312
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.10.80.80.80.90.90.91.00.40.40.40.40.30.30.30.30.30.30.30.30.30.40.40.40.40.2

us-gaap:OtherAssetsNoncurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value200.00.00.00.00.00.00.00.0
Percentage of OtherAssetsNoncurrent89.80.00.00.00.00.00.00.00.0
Percentage of Assets0.80.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany1.10.00.00.00.00.00.00.00.0

us-gaap:OtherAssetsNoncurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Other
Period End2020-11-19
Value-9.654
Percentage of OtherAssetsNoncurrent-51.5
Percentage of Assets-0.4
Percentage of Assets oas:FreshStartAdjustments6.7

oas:ReorganizationAdjustments


Other
Period End2020-11-19
Value7.017
Percentage of OtherAssetsNoncurrent37.4
Percentage of Assets0.3
Percentage of Assets oas:ReorganizationAdjustments-13.8

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4.8676.4923.242319.2061.2985.1311417181510201729161316128.8374.6457.92910109.98319109.339203932248.9239302312301.010.5161243408.198
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 Assets0.20.30.21.40.40.10.20.50.20.20.20.10.30.20.40.20.20.30.20.10.10.10.20.20.20.30.20.20.40.70.60.50.21.01.10.90.51.20.00.00.73.33.41.2

us-gaap:AccountsPayableCurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:ReorganizationAdjustments


Accounts
Period End2020-11-19
Value21
Percentage of AccountsPayableCurrent70.3
Percentage of Assets1.0
Percentage of Assets oas:ReorganizationAdjustments-42.9

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value223152126131724114324428132531533833130732023323619413912811998128126167177259314410340288283241198180197189200237139119825058
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 Assets7.66.65.85.93.01.75.58.53.74.24.14.44.34.14.33.13.63.02.22.11.91.82.42.33.03.14.55.36.96.25.75.95.14.96.67.57.58.111.77.76.96.34.38.4

us-gaap:AccruedLiabilitiesCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Accrued
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value290.050.1150.1830.2110.0710.0560.0680.216
Percentage of AccruedLiabilitiesCurrent69.30.00.00.10.10.00.00.00.1
Percentage of Assets1.20.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany1.50.00.00.00.00.00.00.00.0

us-gaap:AccruedLiabilitiesCurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Accrued
Period End2020-11-19
Value1.885
Percentage of AccruedLiabilitiesCurrent1.4
Percentage of Assets0.1
Percentage of Assets oas:FreshStartAdjustments-1.3

oas:ReorganizationAdjustments


Accrued
Period End2020-11-19
Value57
Percentage of AccruedLiabilitiesCurrent43.6
Percentage of Assets2.6
Percentage of Assets oas:ReorganizationAdjustments-113.1

Debt Current

us-gaap:DebtCurrent us-gaap:DebtInstrument

us-gaap:DebtCurrent

oas:PromissoryNoteDueWithinOneYear600Percent


Debt
Period End2021-03-22
Value2900000.0
Percentage of DebtCurrent100.0
Percentage of Assets0.0
Percentage of Assets oas:PromissoryNoteDueWithinOneYear600Percent0.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value69150834130564057536149860259355866861181683267062342134035238129136628237041554564279566966054946642436035633035435523118216812482
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 Assets23.522.115.813.726.322.913.817.48.07.77.28.78.011.011.28.89.46.65.45.76.25.46.75.16.67.39.410.913.412.313.111.59.910.413.113.513.114.317.412.810.612.810.611.9

us-gaap:LiabilitiesCurrent us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value5298566816880617673
Percentage of LiabilitiesCurrent92.014.211.214.710.213.17.59.211.8
Percentage of Assets21.11.10.91.10.91.10.81.01.1
Percentage of Assets srt:ParentCompany28.11.51.21.41.21.41.11.41.4

us-gaap:LiabilitiesCurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Liabilities
Period End2020-11-19
Value1.793
Percentage of LiabilitiesCurrent0.6
Percentage of Assets0.1
Percentage of Assets oas:FreshStartAdjustments-1.2

oas:ReorganizationAdjustments


Liabilities
Period End2020-11-19
Value-336.569
Percentage of LiabilitiesCurrent-110.1
Percentage of Assets-15.0
Percentage of Assets oas:ReorganizationAdjustments662.2

Long Term Debt Current

us-gaap:LongTermDebtCurrent us-gaap:ConsolidatedEntities

us-gaap:LongTermDebtCurrent

srt:ParentCompany


Long
Period End2020-09-30
Value360
Percentage of LongTermDebtCurrent100.0
Percentage of Assets14.4
Percentage of Assets srt:ParentCompany19.2

us-gaap:LongTermDebtCurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:ReorganizationAdjustments


Long
Period End2020-11-19
Value-360.64
Percentage of LongTermDebtCurrent0.0
Percentage of Assets-16.1
Percentage of Assets oas:ReorganizationAdjustments709.6

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.1932.1432.6071.8981.052.0063.4354.3016.1828.057.83713
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.00.10.10.10.10.10.10.2

us-gaap:OperatingLeaseLiabilityCurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Operating
Period End2020-11-19
Value-0.076
Percentage of OperatingLeaseLiabilityCurrent-4.0
Percentage of Assets-0.0
Percentage of Assets oas:FreshStartAdjustments0.1

oas:ReorganizationAdjustments


Operating
Period End2020-11-19
Value0.924
Percentage of OperatingLeaseLiabilityCurrent48.7
Percentage of Assets0.0
Percentage of Assets oas:ReorganizationAdjustments-1.8

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value9.0027.448148.8376.2156.987109.8825.1282.0961.985
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.10.20.10.10.10.20.20.20.10.3

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-06-302014-03-312013-12-312013-06-302012-12-312012-09-302012-06-302012-03-312011-12-31
Value1.8123.1231.9542.1520.4120.5131.4861.7362.9032.7823.232.4850.00.040.040.040.040.00.01310150.56.51.6555346327743.3112.7660.00.6880.05.2562.8950.3160.472
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.00.00.10.10.00.00.00.00.00.00.00.00.00.00.00.20.20.30.00.10.09.210.713.00.10.10.00.00.00.20.10.00.0

us-gaap:OtherLiabilitiesCurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Other
Period End2020-11-19
Value-0.034
Percentage of OtherLiabilitiesCurrent-1.6
Percentage of Assets-0.0
Percentage of Assets oas:FreshStartAdjustments0.0

oas:ReorganizationAdjustments


Other
Period End2020-11-19
Value1.774
Percentage of OtherLiabilitiesCurrent82.4
Percentage of Assets0.1
Percentage of Assets oas:ReorganizationAdjustments-3.5

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value10446747102761277727112798289627912735263327572696209723402359230522972125212722012302
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets35.629.432.9105.296.836.236.537.636.535.935.536.935.331.736.637.737.337.239.439.139.640.8

us-gaap:LongTermDebt dei:LegalEntity

oas:OasisGuarantors


Long
Period End2021-06-302020-12-31
Value391260
Percentage of LongTermDebt37.436.6
Percentage of Assets13.312.0
Percentage of Assets oas:OasisGuarantors0.00.0

oas:OasisMidstreamPartnersLP


Long
Period End2021-06-302020-12-31
Value653450
Percentage of LongTermDebt62.663.4
Percentage of Assets22.220.8
Percentage of Assets oas:OasisMidstreamPartnersLP0.00.0

us-gaap:LongTermDebt us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, oas:OMPRevolvingLineofCredit, us-gaap:LineOfCredit


Long
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-30
Value213487487487431408
Percentage of LongTermDebt20.40.017.717.515.414.1
Percentage of Assets7.319.418.617.05.65.3
Percentage of Assets us-gaap:RevolvingCreditFacility oas:OMPRevolvingLineofCredit us-gaap:LineOfCredit0.00.00.00.00.00.0

us-gaap:RevolvingCreditFacility, oas:SeniorSecuredRevolvingLineofCredit, us-gaap:LineOfCredit


Long
Period End2020-09-302020-06-302020-03-312019-09-302019-06-30
Value360502522406531
Percentage of LongTermDebt0.018.218.814.518.3
Percentage of Assets14.419.118.25.36.9
Percentage of Assets us-gaap:RevolvingCreditFacility oas:SeniorSecuredRevolvingLineofCredit us-gaap:LineOfCredit0.00.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1044674710795455487276127772711279828962791273526332757269620972340235923052297212521272201230223802355236527002550230022602535236012001200120012008008008004004000.0
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets35.629.432.935.518.719.4105.296.836.236.537.636.535.935.536.935.331.736.637.737.337.239.439.139.640.841.640.740.045.546.745.747.253.857.843.545.347.548.439.344.146.330.433.90.0

us-gaap:LongTermDebtNoncurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:ReorganizationAdjustments


Long
Period End2020-11-19
Value340
Percentage of LongTermDebtNoncurrent42.7
Percentage of Assets15.2
Percentage of Assets oas:ReorganizationAdjustments-669.0

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value0.9840.9844.4311.0974.8981012267291308296300230205306305508513
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.20.00.20.40.43.63.84.03.93.93.12.84.04.68.08.3

us-gaap:DeferredIncomeTaxLiabilitiesNet us-gaap:ConsolidatedEntities

srt:ParentCompany


Deferred
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value4.8980.00.00.00.00.00.00.00.0
Percentage of DeferredIncomeTaxLiabilitiesNet100.00.00.00.00.00.00.00.00.0
Percentage of Assets0.20.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany0.30.00.00.00.00.00.00.00.0

us-gaap:DeferredIncomeTaxLiabilitiesNet us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Deferred
Period End2020-11-19
Value-6.412
Percentage of DeferredIncomeTaxLiabilitiesNet-144.7
Percentage of Assets-0.3
Percentage of Assets oas:FreshStartAdjustments4.4

oas:ReorganizationAdjustments


Deferred
Period End2020-11-19
Value9.746
Percentage of DeferredIncomeTaxLiabilitiesNet220.0
Percentage of Assets0.4
Percentage of Assets oas:ReorganizationAdjustments-19.2

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1859796921701711691712001941891861841381381371371150.0
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets6.34.24.54.17.06.96.46.02.72.52.52.42.41.91.81.82.11.80.0

us-gaap:MinorityInterest us-gaap:ConsolidatedEntities

srt:ParentCompany


Minority
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.0860.00.00.00.00.00.00.00.0
Percentage of MinorityInterest0.10.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterest us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Minority
Period End2020-11-19
Value-86.831
Percentage of MinorityInterest-93.6
Percentage of Assets-3.9
Percentage of Assets oas:FreshStartAdjustments59.9

oas:ReorganizationAdjustments


Minority
Period End2020-11-19
Value9.094
Percentage of MinorityInterest9.8
Percentage of Assets0.4
Percentage of Assets oas:ReorganizationAdjustments-17.9

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value5921000.06406000.07744000.07058000.03634000.03597000.07066000.05213000.06019000.02084000.06957000.06239000.07751000.07775000.06529000.07822000.06182000.05805000.05506000.02834000.02918000.02992000.03043000.03091000.03160000.03216000.03267000.03327000.02116000.01996000.01963000.02002000.02183000.02310000.02435000.01908000.01997000.02078000.01751000.02013000.0997000.01027000.01058000.0780000.0
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.30.40.30.10.10.30.20.10.00.10.10.10.10.10.10.10.10.10.00.00.10.10.10.10.10.10.10.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.1

us-gaap:OtherLiabilitiesNoncurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Other
Period End2020-11-19
Value-32000.0
Percentage of OtherLiabilitiesNoncurrent-0.5
Percentage of Assets-0.0
Percentage of Assets oas:FreshStartAdjustments0.0

oas:ReorganizationAdjustments


Other
Period End2020-11-19
Value3456000.0
Percentage of OtherLiabilitiesNoncurrent49.0
Percentage of Assets0.2
Percentage of Assets oas:ReorganizationAdjustments-6.8

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.5521.9342.362150.9140.973171717191817
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.70.00.00.70.60.20.20.20.2

us-gaap:OperatingLeaseLiabilityNoncurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Operating
Period End2020-11-19
Value-0.74
Percentage of OperatingLeaseLiabilityNoncurrent-4.7
Percentage of Assets-0.0
Percentage of Assets oas:FreshStartAdjustments0.5

oas:ReorganizationAdjustments


Operating
Period End2020-11-19
Value15
Percentage of OperatingLeaseLiabilityNoncurrent98.9
Percentage of Assets0.7
Percentage of Assets oas:ReorganizationAdjustments-30.4

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value1548000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value787000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value102000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312019-12-312019-09-302019-06-302019-03-31
Value4.9724272530
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0
Percentage of Assets0.20.30.40.30.4

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value5181000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets0.2

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value211000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value836864915965-897.167-810.015-759.124-670.739363637053676362437343505343637483375294229772953292323872360244423192309227623241872169015641519134897591984979575072965163464657955117182
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.537.642.443.1-36.9-32.3-28.9-23.448.548.347.747.449.047.346.049.151.046.047.647.747.344.243.444.041.140.339.439.331.531.031.131.728.623.933.332.131.430.235.835.936.749.249.179.80.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-785.56936363705367636373744351134403377
Percentage of StockholdersEquity97.0100.0100.0100.0100.3100.3100.2100.1100.1
Percentage of Assets-31.348.548.347.747.649.147.446.151.1
Percentage of Assets srt:ParentCompany-41.764.564.664.364.364.863.663.062.5

us-gaap:StockholdersEquity us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Stockholders
Period End2020-11-19
Value-39.192
Percentage of StockholdersEquity-4.1
Percentage of Assets-1.8
Percentage of Assets oas:FreshStartAdjustments27.0

oas:ReorganizationAdjustments


Stockholders
Period End2020-11-19
Value1901
Percentage of StockholdersEquity197.0
Percentage of Assets85.0
Percentage of Assets oas:ReorganizationAdjustments-3742.2

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-11-202020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value1021962101210581058-726.614-638.151-589.911-499.1723837389938663811391836443574388635133058292323191872
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets34.841.946.90.047.3-29.9-25.5-22.5-17.451.250.950.149.851.449.147.950.953.147.947.341.131.5

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-785.48336363705367636373744351134403377
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest123.194.895.095.195.495.596.496.396.1
Percentage of Assets-31.348.548.347.747.649.147.446.151.1
Percentage of Assets srt:ParentCompany-41.764.564.664.364.364.863.663.062.5

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Stockholders
Period End2020-11-19
Value-126.023
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-11.9
Percentage of Assets-5.6
Percentage of Assets oas:FreshStartAdjustments86.9

oas:ReorganizationAdjustments


Stockholders
Period End2020-11-19
Value1911
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest180.6
Percentage of Assets85.4
Percentage of Assets oas:ReorganizationAdjustments-3760.1

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-11-202020-11-192020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value8709589659659653128312231193112310430963087307730703062305526772369234514971007
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest85.299.695.491.291.2-490.3-529.4-624.881.179.680.181.078.584.385.778.676.277.580.264.553.8
Percentage of Assets29.641.744.70.043.1124.8118.9108.741.540.540.240.440.441.441.040.040.537.138.026.517.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-11-202020-11-192020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value0.20.20.20.20.23.2324.2393.2213.1893.1863.1833.1823.1573.1573.1543.1542.6682.3482.3311.3761.001
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.0-0.5-0.7-0.60.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.10.20.10.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-11-202020-11-192020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value185979692921711691712001941891861841381381371371150.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest18.210.19.68.88.8-26.9-28.7-34.45.25.04.94.94.73.83.93.53.93.80.0
Percentage of Assets6.34.24.50.04.16.96.46.02.72.52.52.42.41.91.81.82.11.80.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value-20.14-93.504-49.912-3905.467-3849.768-3756.825554630610567682460398718717593591834874
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-2.0-9.7-4.9612.0652.6752.614.416.215.814.917.412.611.118.520.419.420.236.046.7
Percentage of Assets-0.7-4.1-2.3-155.8-146.6-130.97.48.27.97.49.06.25.39.410.99.39.614.814.7
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-312014-12-31
Value-14.56-36.532-36.507-36.189-33.881-33.65-33.33-33.286-29.025-28.985-28.243-28.2-22.179-22.132-15.95-13.62-10.671
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-1.45.76.27.2-0.9-0.9-0.9-0.9-0.7-0.8-0.8-0.7-0.6-0.7-0.5-0.6-0.6
Percentage of Assets-0.5-1.5-1.4-1.3-0.5-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.3-0.3-0.3-0.2-0.2
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value200000.0200000.0200000.0200000.03233000.03232000.04239000.03221000.03189000.03186000.03183000.03182000.03157000.03157000.03154000.03154000.02668000.02348000.02345000.02344000.02331000.01779000.01777000.01774000.01376000.01376000.01373000.01372000.01001000.01000000.0999000.0999000.0996000.0926000.0925000.0925000.0925000.0923000.0922000.0922000.0921000.0921000.0921000.0920000.0
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 Assets0.00.00.00.00.10.10.20.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.1

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Common
Period End2020-09-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3232000.03182000.03157000.03157000.03154000.02668000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.00.00.00.00.0
Percentage of Assets srt:ParentCompany0.20.10.10.10.10.0

us-gaap:CommonStockValue us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:ReorganizationAdjustments


Common
Period End2020-11-192020-11-18
Value200000.0-3233000.0
Percentage of CommonStockValue100.0-100.0
Percentage of Assets0.0-0.1
Percentage of Assets oas:ReorganizationAdjustments-0.40.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-11-182020-09-302019-12-31
Value87095896596531283112
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0
Percentage of Assets29.641.744.739.7124.841.5

us-gaap:AdditionalPaidInCapital us-gaap:ConsolidatedEntities

srt:ParentCompany


Additional
Period End2020-09-30
Value3128
Percentage of AdditionalPaidInCapital100.0
Percentage of Assets124.8
Percentage of Assets srt:ParentCompany166.2

us-gaap:AdditionalPaidInCapital us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:ReorganizationAdjustments


Additional
Period End2020-11-18
Value965
Percentage of AdditionalPaidInCapital100.0
Percentage of Assets39.7
Percentage of Assets oas:ReorganizationAdjustments0.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2020-12-312020-11-182020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9653131312231193112310430963087307730703062305526772369236223542345175516931687149714901484147810071001995989985666663660657653651648647646645643
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets44.7128.7118.9108.741.540.540.240.440.441.441.040.040.537.137.738.038.032.531.230.326.526.025.725.017.018.319.820.620.916.324.124.926.026.432.035.837.549.254.693.0

us-gaap:AdditionalPaidInCapitalCommonStock us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:ReorganizationAdjustments


Additional
Period End2020-11-19
Value-3131.446
Percentage of AdditionalPaidInCapitalCommonStock0.0
Percentage of Assets-139.9
Percentage of Assets oas:ReorganizationAdjustments6161.2

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-20.14-93.504-49.912-3995.209-3905.467-3849.768-3756.82555463061056768246039871871759363461859164668077083483080385687469857653736731325819113997792.986-13.455-0.054-66.343-92.845
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.7-4.1-2.3-164.2-155.8-146.6-130.97.48.27.97.49.06.25.39.410.99.310.110.09.612.012.513.814.814.513.914.514.712.811.411.27.87.79.47.25.53.93.90.2-0.8-0.0-5.6-13.4

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:ConsolidatedEntities

srt:ParentCompany


Retained
Period End2020-09-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-3881.021579691466402719
Percentage of RetainedEarningsAccumulatedDeficit99.4102.1101.3101.4101.1100.3
Percentage of Assets-154.87.69.16.35.410.9
Percentage of Assets srt:ParentCompany-206.210.212.08.57.413.3

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Retained
Period End2020-11-19
Value-39.192
Percentage of RetainedEarningsAccumulatedDeficit0.0
Percentage of Assets-1.8
Percentage of Assets oas:FreshStartAdjustments27.0

oas:ReorganizationAdjustments


Retained
Period End2020-11-19
Value4034
Percentage of RetainedEarningsAccumulatedDeficit0.0
Percentage of Assets180.3
Percentage of Assets oas:ReorganizationAdjustments-7937.8

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312011-06-302010-12-31
Value14363636363333333329282828222221211515151413131212100.5590.0
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.51.51.51.41.30.50.40.40.40.40.40.40.40.30.30.30.30.30.30.30.30.20.20.20.20.20.00.0

us-gaap:TreasuryStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Treasury
Period End2020-09-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value363329282822
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0
Percentage of Assets1.50.40.40.40.40.3
Percentage of Assets srt:ParentCompany1.90.60.50.50.50.4

us-gaap:TreasuryStockValue us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:ReorganizationAdjustments


Treasury
Period End2020-11-19
Value-36.637
Percentage of TreasuryStockValue0.0
Percentage of Assets-1.6
Percentage of Assets oas:ReorganizationAdjustments72.1

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1859796921701711691712001941891861841381381371371150.0
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets6.34.24.54.17.06.96.46.02.72.52.52.42.41.91.81.82.11.80.0

us-gaap:MinorityInterest us-gaap:ConsolidatedEntities

srt:ParentCompany


Minority
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.0860.00.00.00.00.00.00.00.0
Percentage of MinorityInterest0.10.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterest us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:FreshStartAdjustments


Minority
Period End2020-11-19
Value-86.831
Percentage of MinorityInterest-93.6
Percentage of Assets-3.9
Percentage of Assets oas:FreshStartAdjustments59.9

oas:ReorganizationAdjustments


Minority
Period End2020-11-19
Value9.094
Percentage of MinorityInterest9.8
Percentage of Assets0.4
Percentage of Assets oas:ReorganizationAdjustments-17.9

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.1366.0296.026.0146.0285.4585.1564.9373.7213.5473.3963.45
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6.1366.0296.026.0146.0285.4585.1564.9373.7213.5473.3963.45
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1591909595-47.881072522502141742342293032282098810210710432137-46.05179501418819918727720816117818717011011010962363779221810
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.753.679.435.1-28.827.852.352.040.430.439.142.160.648.248.129.240.238.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value88-41.868-9.8816018-130.768-157.94-143.163-303.651-224.002-359.833-96.969-344.166-812.568-271.805-183.814-154.375-104.766-858.657-96.758-85.058-30.355-28.79-75.858-123.818-250.682-370.338-395.062-346.95334-683.53-1355.255-188.467-217.824-175.162-461.549-156.761-245.133-120.378-173.988-134.235-200.789-144.83-66.488
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.5-11.8-8.222.211.0-33.7-32.6-29.7-57.4-38.9-60.0-17.7-68.6-171.5-62.5-60.3-60.8-37.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value427-55.717-85.702-148.222-27.048136-94.425-108.6329442130-133.19639585709149-0.47475172-65.31686-53.22323-14.21112614924839-278.7714881140-3.181-0.181-1.952392-0.746-1.206391-0.0030.03890.0-0.375
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax108.7-15.7-71.5-54.7-16.335.3-19.5-22.517.87.421.8-24.47.9123.516.330.219.7-0.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value67592-0.3286.857-56.5941130.594-0.8334.816-6.7485.298-0.18-0.6631.015
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax171.926.1-0.32.5-34.029.40.1-0.20.9-1.20.9-0.0-0.10.2

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-3.654-3.447-5.144-2.638-254.677-23.859-17.45712-3.5476924-101.1210.828-202.414-18.8462.33916-31.72-16.691-52.498-27.6291.71520-30.845-7.376109781998323436302511459.822-8.2263820-4.1613.8569.239
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value383916363320320921017718917016215314914613212512611911112212212312311911811610697911017266666557443827201313139.7538.783
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidatedEntities

srt:ParentCompany


Depreciation
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value310.00.00.00.00.00.00.00.00.00.00.0
Percentage of DepreciationDepletionAndAmortization86.70.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Depreciation
Period End2020-12-31
Value-1.894
Percentage of DepreciationDepletionAndAmortization-11.8

us-gaap:DepreciationDepletionAndAmortization us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Depreciation
Period End2020-12-31
Value13
Percentage of DepreciationDepletionAndAmortization85.7

us-gaap:OperatingSegments, oas:MidstreamServices


Depreciation
Period End2020-12-31
Value4.199
Percentage of DepreciationDepletionAndAmortization26.1

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3660-68.322-0.878-18.052-149.819-12.174-14.469-58.16971-37.767550.1585.7087767-8.7352223-7.052-5.2920.995-0.152-32.51-12.486-63.313-79.28325279.2753953103.3620420.802262321136.667217.294
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value7.386-4.506-1.902-2.5334.4394.32.2176.705-6.2133.1842.277.3551.0493.6722.266-0.772-2.6723.6792.305-0.505-1.705-0.3491.552-4.74-4.2870.602-0.3137.105-2.226-0.795.1214.62-4.2078.4072.5235.154119.6410.71.7850.0280.037-0.247-1.044
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4.6213.8545.8030.7810.0233.275-1.4226.7380.0824.391-1.1160.1490.994-0.248
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1591909595-47.881072522502141742342293032282098810210710432137-46.05179501418819918727720816117818717011011010962363779221810
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax40.753.679.435.1-28.827.852.352.040.430.439.142.160.648.248.129.240.238.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value73-43.592-49.912-55.699-92.943-4310.861-76.4062042-114.88222162-320.2040.59124-41.2141623-54.688-33.942-89.931-64.4553.96827-53.23-18.041176121381695454675142187616-13.4016633-6.8471.587-1.701-26.35
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.7-12.3-41.6-20.5-55.9-1111.6-15.84.28.1-20.037.011.4-63.90.128.7-13.56.58.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ConsolidatedEntities

srt:ParentCompany


Net
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-38.048-76.4062042-114.88222162-320.2040.59124-41.21416
Percentage of NetIncomeLoss68.3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-14.0-15.84.28.1-20.037.011.4-63.90.128.7-13.56.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany-16.80.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value81-35.265-45.962-47.097-89.349-4334.275-64.1543051-107.97822666-316.3013.712128-41.0641623-54.688-33.942-89.931-64.455-13.4016633-6.8471.587-1.701-26.35-3.231
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.7-9.9-38.3-17.4-53.7-1117.7-13.36.39.7-18.837.812.1-63.10.829.5-13.56.58.60.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:ConsolidatedEntities

srt:ParentCompany


Profit
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-37.962-76.4062042-114.88222162-320.2040.59124-41.214
Percentage of ProfitLoss80.6119.166.983.6106.497.894.1101.215.997.3100.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-14.0-15.84.28.1-20.037.011.4-63.90.128.7-13.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax srt:ParentCompany-16.80.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value7.9458.3273.958.6023.594-23.414108.4176.9044.8893.8823.9033.1223.5
Percentage of ProfitLoss9.8-23.6-8.6-18.3-4.00.533.116.4-6.42.25.9-1.284.12.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.33.33.22.2-6.02.11.61.20.80.70.80.70.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value73-43.592-49.912-55.699-92.943-4310.8612042-114.88222162-320.2040.59124
Percentage of ProfitLoss90.2123.6108.6118.3104.099.566.983.6106.497.894.1101.215.997.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax18.7-12.3-41.6-20.5-55.9-1111.64.28.1-20.037.011.4-63.90.128.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value4.7022.1980.274.8344.896.8077.2378.4468.9119.0137.6877.4567.3766.7546.0836.6287.1156.7085.3425.7826.2496.735.6435.9666.0577.6065.5476.0775.1734.5053.5713.043.0822.2893.7062.7292.3071.5911.0641.0211.0440.5274.160.561
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation dei:LegalEntity

oas:OMPGeneralPartnerLLC


Share
Period End2020-12-31
Value0.2
Percentage of ShareBasedCompensation74.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value88-41.868-9.8816018-130.768-157.94-143.163-303.651-224.002-359.833-96.969-344.166-812.568-271.805-183.814-154.375-104.766-858.657-96.758-85.058-30.355-28.79-75.858-123.818-250.682-370.338-395.062-346.95334-683.53-1355.255-188.467-217.824-175.162-461.549-156.761-245.133-120.378-173.988-134.235-200.789-144.83-66.488
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax22.5-11.8-8.222.211.0-33.7-32.6-29.7-57.4-38.9-60.0-17.7-68.6-171.5-62.5-60.3-60.8-37.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value427-55.717-85.702-148.222-27.048136-94.425-108.6329442130-133.19639585709149-0.47475172-65.31686-53.22323-14.21112614924839-278.7714881140-3.181-0.181-1.952392-0.746-1.206391-0.0030.03890.0-0.375
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax108.7-15.7-71.5-54.7-16.335.3-19.5-22.517.87.421.8-24.47.9123.516.330.219.7-0.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromIssuanceOfLongTermDebt

oas:SeniorNotesDueApril12029800Percent, us-gaap:UnsecuredDebt


Proceeds
Period End2021-03-30
Value442
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-05-312021-06-302021-03-222021-03-31
Value7.57.5047.57.535
Percentage of PaymentsOfDividends100.0100.0100.0100.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-03-31
Value7.535
Percentage of Dividends100.0

us-gaap:Dividends us-gaap:Dividends

oas:RegularCashDividend


Dividendsus-gaap:
Period End2021-06-302021-03-31
Value8.097.535
Percentage of Dividends0.0100.0

oas:SpecialCashDividend


Dividendsus-gaap:
Period End2021-06-30
Value82
Percentage of Dividends0.0

us-gaap:Dividends us-gaap:Dividends, us-gaap:StatementEquityComponents

oas:RegularCashDividend, us-gaap:AdditionalPaidInCapital


Dividendsus-gaap:
Period End2021-06-302021-03-31
Value8.097.535
Percentage of Dividends0.0100.0

oas:SpecialCashDividend, us-gaap:AdditionalPaidInCapital


Dividendsus-gaap:
Period End2021-06-30
Value82
Percentage of Dividends0.0

us-gaap:Dividends us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Dividendsus-gaap:
Period End2021-03-31
Value7.535
Percentage of Dividends100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument

us-gaap:DebtInstrumentInterestRateStatedPercentage

oas:PromissoryNoteDueWithinOneYear600Percent


Debt
Period End2021-03-22
Value6.6
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations oas:PromissoryNoteDueWithinOneYear600Percent0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range

srt:Maximum


Debt
Period End2020-11-19
Value6.58
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Maximum0.0

srt:Minimum


Debt
Period End2020-11-19
Value3.06
Percentage of DebtInstrumentInterestRateStatedPercentage0.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Minimum0.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value4.39.46.979.80.0270.0560.0152-1.3430.1930.033-0.00350.272-0.242-0.1823.0921-0.315-0.1240.4020.00590.330.3690.3-0.0010.430.3670.29-0.00140.3860.3750.37400.3820.360.3750.00020.3850.374
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


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
Value0.98426730030551360867234319910790
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value67202184223263134
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value5595705658498538302.9152.8631.1591.3440.0
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

oas:AdjustmentsToAdditionalPaidInCapitaWarrantExercised

oas:AdjustmentsToAdditionalPaidInCapitaWarrantExercised


Adjustments
Period End2021-06-302021-03-31
Value-167000.0-6000.0
Percentage of AdjustmentsToAdditionalPaidInCapitaWarrantExercised100.0100.0

oas:AdjustmentsToAdditionalPaidInCapitaWarrantExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-31
Value-167000.0-6000.0
Percentage of AdjustmentsToAdditionalPaidInCapitaWarrantExercised100.0100.0

oas:CapitalExpendituresCashandNonCash

oas:CapitalExpendituresCashandNonCash


Capital
Period End2020-12-31
Value18
Percentage of CapitalExpendituresCashandNonCash100.0

oas:CapitalExpendituresCashandNonCash us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Capital
Period End2020-12-31
Value-0.385
Percentage of CapitalExpendituresCashandNonCash-2.1

oas:CapitalExpendituresCashandNonCash us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Capital
Period End2020-12-31
Value15
Percentage of CapitalExpendituresCashandNonCash85.2

us-gaap:OperatingSegments, oas:MidstreamServices


Capital
Period End2020-12-31
Value3.054
Percentage of CapitalExpendituresCashandNonCash16.9

oas:ChangeInCapitalExpendituresIncurredButNotYetPaid

oas:ChangeInCapitalExpendituresIncurredButNotYetPaid


Change
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.6066.9097.938-21.284-85.98825-39.663-12.153-6.912-23.686-10.065-11.02977122044108.396
Percentage of ChangeInCapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:ClassOfWarrantOrRightExercisedDuringThePeriod us-gaap:StatementEquityComponents

oas:ClassOfWarrantOrRightExercisedDuringThePeriod

us-gaap:CommonStock


Class
Period End2021-06-30
Value2000.0
Percentage of ClassOfWarrantOrRightExercisedDuringThePeriod100.0

oas:CommonControlTransactionCosts

oas:CommonControlTransactionCosts


Common
Period End2021-06-302021-03-31
Value1321000.0-4111000.0
Percentage of CommonControlTransactionCosts100.0100.0

oas:CommonControlTransactionCosts us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Common
Period End2021-06-302021-03-31
Value1321000.0-4111000.0
Percentage of CommonControlTransactionCosts100.0100.0

oas:ConsiderationContributedPartnership us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

oas:ConsiderationContributedPartnership

oas:SimplificationTransaction, srt:AffiliatedEntity


Consideration
Period End2021-03-30
Value512
Percentage of ConsiderationContributedPartnership100.0

oas:ContractWithCustomerLiabilityCashReceived

oas:ContractWithCustomerLiabilityCashReceived


Contract
Period End2020-12-31
Value487000.0
Percentage of ContractWithCustomerLiabilityCashReceived100.0

oas:DebtDiscountAmortizationAndOther

oas:DebtDiscountAmortizationAndOther


Debt
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
Value132.326.8242.286106.1889.0735.9455.3156.938.9839.5565.0435.4755.6453.7953.9314.944.163.6221.4865.0664.8312.4093.4041.6555.8191.9891.7331.4871.5550.941.0070.7460.7720.7730.6170.6480.520.3930.3920.2560.0480.09
Percentage of DebtDiscountAmortizationAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:DebtInstrumentGeneralDebtObligationMaximumConsolidatedInterestCoverageRatio us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:DebtInstrumentGeneralDebtObligationMaximumConsolidatedInterestCoverageRatio

us-gaap:RevolvingCreditFacility, oas:OMPRevolvingLineofCredit, us-gaap:LineOfCredit


Debt
Period End2021-03-22
Value2.5
Percentage of DebtInstrumentGeneralDebtObligationMaximumConsolidatedInterestCoverageRatio100.0

oas:DebtInstrumentGeneralDebtObligationMaximumConsolidatedTotalLeverageRatio us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:DebtInstrumentGeneralDebtObligationMaximumConsolidatedTotalLeverageRatio

us-gaap:RevolvingCreditFacility, oas:OMPRevolvingLineofCredit, us-gaap:LineOfCredit


Debt
Period End2021-03-22
Value5.0
Percentage of DebtInstrumentGeneralDebtObligationMaximumConsolidatedTotalLeverageRatio100.0

oas:DebtInstrumentGeneralDebtObligationMaximumSeniorSecuredLeverageRatio us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:DebtInstrumentGeneralDebtObligationMaximumSeniorSecuredLeverageRatio

us-gaap:RevolvingCreditFacility, oas:OMPRevolvingLineofCredit, us-gaap:LineOfCredit


Debt
Period End2021-03-22
Value3.0
Percentage of DebtInstrumentGeneralDebtObligationMaximumSeniorSecuredLeverageRatio100.0

oas:DebtInstrumentGeneralDebtObligationMinimumConsolidatedInterestCoverageRatio us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:DebtInstrumentGeneralDebtObligationMinimumConsolidatedInterestCoverageRatio

us-gaap:RevolvingCreditFacility, oas:OMPRevolvingLineofCredit, us-gaap:LineOfCredit


Debt
Period End2021-03-22
Value2.5
Percentage of DebtInstrumentGeneralDebtObligationMinimumConsolidatedInterestCoverageRatio100.0

oas:DebtorReorganizationItemsWriteOffOfDebtDiscounts

oas:DebtorReorganizationItemsWriteOffOfDebtDiscounts


Debtor
Period End2020-09-30
Value38
Percentage of DebtorReorganizationItemsWriteOffOfDebtDiscounts100.0

oas:DebtorReorganizationItemsWriteOffOfDebtIssuanceCosts

oas:DebtorReorganizationItemsWriteOffOfDebtIssuanceCosts


Debtor
Period End2020-09-30
Value11
Percentage of DebtorReorganizationItemsWriteOffOfDebtIssuanceCosts100.0

oas:EffectiveIncomeTaxRateReconciliationDischargeOfDebtAndOtherReorganizationItemsAmount

oas:EffectiveIncomeTaxRateReconciliationDischargeOfDebtAndOtherReorganizationItemsAmount


Effective
Period End2020-12-31
Value0.232
Percentage of EffectiveIncomeTaxRateReconciliationDischargeOfDebtAndOtherReorganizationItemsAmount100.0

oas:EffectiveIncomeTaxRateReconciliationDischargeOfDebtAndOtherReorganizationItemsPercent

oas:EffectiveIncomeTaxRateReconciliationDischargeOfDebtAndOtherReorganizationItemsPercent


Effective
Period End2020-12-31
Value-0.47
Percentage of EffectiveIncomeTaxRateReconciliationDischargeOfDebtAndOtherReorganizationItemsPercent100.0

oas:EquityPortionAttributableToLimitedPartnersCapitalAccountTransactions us-gaap:StatementEquityComponents

oas:EquityPortionAttributableToLimitedPartnersCapitalAccountTransactions

us-gaap:AdditionalPaidInCapital


Equity
Period End2021-03-31
Value2358000.0
Percentage of EquityPortionAttributableToLimitedPartnersCapitalAccountTransactions100.0

us-gaap:NoncontrollingInterest


Equity
Period End2021-03-31
Value-2358000.0
Percentage of EquityPortionAttributableToLimitedPartnersCapitalAccountTransactions-100.0

oas:ExtinguishmentOfDebtAccruedInterestAmount us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:ExtinguishmentOfDebtAccruedInterestAmount

us-gaap:RevolvingCreditFacility, oas:SeniorSecuredRevolvingLineofCredit, us-gaap:LineOfCredit


Extinguishment
Period End2020-11-19
Value800000.0
Percentage of ExtinguishmentOfDebtAccruedInterestAmount100.0

us-gaap:RevolvingCreditFacility, oas:SeniorSecuredSuperpriorityDebtorInPossessionRevolvingCreditAgreement, us-gaap:LineOfCredit


Extinguishment
Period End2020-11-19
Value1400000.0
Percentage of ExtinguishmentOfDebtAccruedInterestAmount175.0

oas:FreshStartAdjustmentGalinLossOnRevaluationAdjustments

oas:FreshStartAdjustmentGalinLossOnRevaluationAdjustments


Fresh
Period End2020-11-19
Value-132440000.0
Percentage of FreshStartAdjustmentGalinLossOnRevaluationAdjustments100.0

oas:FreshStartAdjustmentIncomeTaxBenefitLoss

oas:FreshStartAdjustmentIncomeTaxBenefitLoss


Fresh
Period End2020-12-31
Value6412000.0
Percentage of FreshStartAdjustmentIncomeTaxBenefitLoss100.0

oas:FreshStartAdjustmentNetIncomeLoss

oas:FreshStartAdjustmentNetIncomeLoss


Fresh
Period End2020-12-31
Value-39192000.0
Percentage of FreshStartAdjustmentNetIncomeLoss100.0

oas:FreshStartAdjustmentNetIncomeLossFromFreshStartAdjusmentsAttributableToNoncontrollingInterest

oas:FreshStartAdjustmentNetIncomeLossFromFreshStartAdjusmentsAttributableToNoncontrollingInterest


Fresh
Period End2020-12-31
Value86
Percentage of FreshStartAdjustmentNetIncomeLossFromFreshStartAdjusmentsAttributableToNoncontrollingInterest100.0

oas:FreshStartAdjustmentNetIncomeLossFromFreshStartAdjustmentsIncludingNoncontrollingInterest

oas:FreshStartAdjustmentNetIncomeLossFromFreshStartAdjustmentsIncludingNoncontrollingInterest


Fresh
Period End2020-12-31
Value-126020000.0
Percentage of FreshStartAdjustmentNetIncomeLossFromFreshStartAdjustmentsIncludingNoncontrollingInterest100.0

oas:IncentiveCompensationProgramExcessOfCashValueOverAfterTaxValueOfPrepaidCashIncentivesPaymentsMade us-gaap:TitleOfIndividual, us-gaap:PlanName

oas:IncentiveCompensationProgramExcessOfCashValueOverAfterTaxValueOfPrepaidCashIncentivesPaymentsMade

oas:OfficersAndCertainOtherSeniorEmployees, oas:A2020IncentiveCompensationProgram


Incentive
Period End2020-09-302020-06-30
Value4100000.04100000.0
Percentage of IncentiveCompensationProgramExcessOfCashValueOverAfterTaxValueOfPrepaidCashIncentivesPaymentsMade100.0100.0

oas:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerPercentageAcquired dei:LegalEntity, us-gaap:Ownership

oas:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerPercentageAcquired

oas:OasisMidstreamPartnersLP, oas:BeartoothDevCo


Limited
Period End2021-03-30
Value30.0
Percentage of LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerPercentageAcquired100.0

oas:OasisMidstreamPartnersLP, oas:BobcatDevCo


Limited
Period End2021-03-30
Value64.7
Percentage of LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerPercentageAcquired215.7

oas:LineOfCreditFacilityIncreaseDecreaseInMaximumBorrowingCapacity us-gaap:AssetAcquisition, us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:LineOfCreditFacilityIncreaseDecreaseInMaximumBorrowingCapacity

oas:A2021WillistonAcquisition, us-gaap:RevolvingCreditFacility, oas:OasisCreditFacilityFourthAgreement, us-gaap:LineOfCredit


Line
Period End2021-05-21
Value250
Percentage of LineOfCreditFacilityIncreaseDecreaseInMaximumBorrowingCapacity100.0

oas:LineOfCreditFacilityIncreaseDecreaseInMaximumBorrowingCapacity us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:LongtermDebtType

us-gaap:RevolvingCreditFacility, oas:OasisCreditFacilityFourthAgreement, oas:PrimaryPermianBasinSale, us-gaap:LineOfCredit


Line
Period End2021-05-21
Value-100.0
Percentage of LineOfCreditFacilityIncreaseDecreaseInMaximumBorrowingCapacity-40.0

oas:LitigationSettlementAmountAwardedToOtherPartyPortionDueOnEffectiveDateOfPlan us-gaap:LitigationCase, us-gaap:LitigationStatus

oas:LitigationSettlementAmountAwardedToOtherPartyPortionDueOnEffectiveDateOfPlan

oas:MiradaLitigation, us-gaap:SettledLitigation


Litigation
Period End2020-09-28
Value20
Percentage of LitigationSettlementAmountAwardedToOtherPartyPortionDueOnEffectiveDateOfPlan100.0

oas:SolomonLitigation, us-gaap:SettledLitigation


Litigation
Period End2020-09-14
Value0.015
Percentage of LitigationSettlementAmountAwardedToOtherPartyPortionDueOnEffectiveDateOfPlan0.0

oas:NonCashAssetRetirementObligations

oas:NonCashAssetRetirementObligations


Non
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1.0350.3770.8210.9551.0840.8030.2741.8242.0161.026-2.5531.9543.453-3.9011.3530.9720.787110.702-9.9971.2120.5670.7561.2361.4131.0483.511.752-0.1289.0280.7321.3932.0482.4563.5891.3182.8671.5091.5680.7011.656
Percentage of NonCashAssetRetirementObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:OtherCommitmentDeficiencyFee us-gaap:OtherCommitments

oas:OtherCommitmentDeficiencyFee

oas:VolumeCommitmentAgreementPermianBasinSale


Other
Period End2021-06-30
Value2400000.0
Percentage of OtherCommitmentDeficiencyFee100.0

oas:PaymentOfEstimatedIncomeTax

oas:PaymentOfEstimatedIncomeTax


Payment
Period End2021-06-30
Value20
Percentage of PaymentOfEstimatedIncomeTax100.0

oas:PaymentsForAssetAcquisitionsDeposit us-gaap:AssetAcquisition

oas:PaymentsForAssetAcquisitionsDeposit

oas:A2021WillistonAcquisition


Payments
Period End2021-05-03
Value74
Percentage of PaymentsForAssetAcquisitionsDeposit100.0

oas:PaymentsOfCommonControlTransactionCosts

oas:PaymentsOfCommonControlTransactionCosts


Payments
Period End2021-06-302021-03-31
Value1321000.04111000.0
Percentage of PaymentsOfCommonControlTransactionCosts100.0100.0

oas:PercentageOfNewEquityAtEmergence us-gaap:PlanName

oas:PercentageOfNewEquityAtEmergence

oas:LongTermIncentivePlanLTIP


Percentage
Period End2020-11-19
Value10.0
Percentage of PercentageOfNewEquityAtEmergence100.0

oas:PercentageOfNewEquityAtEmergenceRequiredToBeAllocated us-gaap:PlanName

oas:PercentageOfNewEquityAtEmergenceRequiredToBeAllocated

oas:LongTermIncentivePlanLTIP


Percentage
Period End2020-11-19
Value5.0
Percentage of PercentageOfNewEquityAtEmergenceRequiredToBeAllocated100.0

oas:ProceedsFromDivestitureOfInterestNetOfAdjustments us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

oas:ProceedsFromDivestitureOfInterestNetOfAdjustments

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:PermianBasinSale


Proceeds
Period End2021-06-30
Value19
Percentage of ProceedsFromDivestitureOfInterestNetOfAdjustments100.0

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:PrimaryPermianBasinSale


Proceeds
Period End2021-06-29
Value347
Percentage of ProceedsFromDivestitureOfInterestNetOfAdjustments0.0

oas:ReorganizationFairValueAssumptionsCommonStockPerShare

oas:ReorganizationFairValueAssumptionsCommonStockPerShare


Reorganization
Period End2020-12-31
Value47.09
Percentage of ReorganizationFairValueAssumptionsCommonStockPerShare100.0

oas:ReorganizationFairValueAssumptionsRiskFreeInterestRate

oas:ReorganizationFairValueAssumptionsRiskFreeInterestRate


Reorganization
Period End2020-12-31
Value0.31
Percentage of ReorganizationFairValueAssumptionsRiskFreeInterestRate100.0

oas:ReorganizationFairValueAssumptionsWarrantsAndRightsOutstanding

oas:ReorganizationFairValueAssumptionsWarrantsAndRightsOutstanding


Reorganization
Period End2020-12-31
Value23
Percentage of ReorganizationFairValueAssumptionsWarrantsAndRightsOutstanding100.0

oas:ReorganizationValueDIPCreditFacilityFees

oas:ReorganizationValueDIPCreditFacilityFees


Reorganization
Period End2020-11-19
Value5853000.0
Percentage of ReorganizationValueDIPCreditFacilityFees100.0

oas:ReorganizationValueGainLossOnDebtDischarge

oas:ReorganizationValueGainLossOnDebtDischarge


Reorganization
Period End2020-11-19
Value992
Percentage of ReorganizationValueGainLossOnDebtDischarge100.0

oas:ReorganizationValueGainLossOnSettlementsOfLiabilitiesSubjectToCompromise

oas:ReorganizationValueGainLossOnSettlementsOfLiabilitiesSubjectToCompromise


Reorganization
Period End2020-12-31
Value934
Percentage of ReorganizationValueGainLossOnSettlementsOfLiabilitiesSubjectToCompromise100.0

oas:ReorganizationValueWriteOffOfUnamortizedDebtDiscount

oas:ReorganizationValueWriteOffOfUnamortizedDebtDiscount


Reorganization
Period End2020-11-19
Value38
Percentage of ReorganizationValueWriteOffOfUnamortizedDebtDiscount100.0

oas:ReorganizationValueWriteOffOfUnamortizedDeferredFinancingCosts

oas:ReorganizationValueWriteOffOfUnamortizedDeferredFinancingCosts


Reorganization
Period End2020-11-19
Value12
Percentage of ReorganizationValueWriteOffOfUnamortizedDeferredFinancingCosts100.0

oas:RepaymentsOfLineOfCreditAccruedInterest us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:RepaymentsOfLineOfCreditAccruedInterest

us-gaap:RevolvingCreditFacility, oas:OMPRevolvingLineofCredit, us-gaap:LineOfCredit


Repayments
Period End2021-03-30
Value500000.0
Percentage of RepaymentsOfLineOfCreditAccruedInterest100.0

oas:RightOfUseAssetReducedFromReductionOperatingLeaseLiability

oas:RightOfUseAssetReducedFromReductionOperatingLeaseLiability


Right
Period End2020-12-31
Value6255000.0
Percentage of RightOfUseAssetReducedFromReductionOperatingLeaseLiability100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation


Adjustments
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value25000.0318000.02308000.0320000.044000.04261000.040000.0742000.043000.06021000.047000.0731000.032000.05419000.055000.0755000.0488000.01032000.0178000.0839000.0412000.01520000.069000.01925000.0290000.03025000.0142000.01060000.0208000.0156000.01895000.093000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Adjustments
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value25000.0318000.02308000.0320000.044000.04261000.040000.0742000.043000.06021000.047000.0731000.032000.05419000.055000.0755000.0488000.01032000.0178000.0839000.0412000.01520000.069000.01925000.0290000.03025000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued


Adjustments
Period End2020-12-31
Value23
Percentage of AdjustmentsToAdditionalPaidInCapitalWarrantIssued100.0

us-gaap:AmortizationOfDebtDiscountPremium us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:AmortizationOfDebtDiscountPremium

oas:A2.625PercentSeniorNotesDueSeptember2023, us-gaap:UnsecuredDebt


Amortization
Period End2020-09-30
Value4200000.0
Percentage of AmortizationOfDebtDiscountPremium100.0

us-gaap:AssetImpairmentCharges us-gaap:PublicUtilitiesInventory

us-gaap:AssetImpairmentCharges

oas:CrudeOilInventory


Asset
Period End2020-09-302020-06-302020-03-31
Value007200000.0
Percentage of AssetImpairmentCharges0.00.0100.0

oas:EquipmentAndMaterialsInventory


Asset
Period End2020-09-30
Value600000.0
Percentage of AssetImpairmentCharges0.0

oas:LongTermLinefillInventory


Asset
Period End2020-09-302020-06-302020-03-31
Value001300000.0
Percentage of AssetImpairmentCharges0.00.018.1

us-gaap:AssetRetirementObligationAccretionExpense

us-gaap:AssetRetirementObligationAccretionExpense


Asset
Period End2021-06-302021-03-312020-12-31
Value1011000.01032000.0342000.0
Percentage of AssetRetirementObligationAccretionExpense100.0100.0100.0

us-gaap:AssetRetirementObligationLiabilitiesIncurred

us-gaap:AssetRetirementObligationLiabilitiesIncurred


Asset
Period End2021-06-302021-03-312020-12-31
Value0.3970.0040.035
Percentage of AssetRetirementObligationLiabilitiesIncurred100.0100.0100.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark

us-gaap:ConcentrationRiskPercentage1

oas:ExxonMobilOilCorporation, us-gaap:Sales


Concentration
Period End2020-12-31
Value22.0
Percentage of ConcentrationRiskPercentage1100.0

oas:Phillips66Company, us-gaap:Sales


Concentration
Period End2020-12-31
Value15.0
Percentage of ConcentrationRiskPercentage168.2

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-06-302021-03-312020-12-31
Value82000.082000.061000.0
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0

us-gaap:ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations

us-gaap:ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations


Contractual
Period End2020-11-19
Value15
Percentage of ContractualInterestExpenseOnPrepetitionLiabilitiesNotRecognizedInStatementOfOperations100.0

us-gaap:CostsIncurredAcquisitionOfOilAndGasProperties

us-gaap:CostsIncurredAcquisitionOfOilAndGasProperties


Costs
Period End2020-12-31
Value15
Percentage of CostsIncurredAcquisitionOfOilAndGasProperties100.0

us-gaap:CostsIncurredAcquisitionOfUnprovedOilAndGasProperties

us-gaap:CostsIncurredAcquisitionOfUnprovedOilAndGasProperties


Costs
Period End2020-12-31
Value0.336
Percentage of CostsIncurredAcquisitionOfUnprovedOilAndGasProperties100.0

us-gaap:CostsIncurredAssetRetirementObligationIncurred

us-gaap:CostsIncurredAssetRetirementObligationIncurred


Costs
Period End2020-12-31
Value0.035
Percentage of CostsIncurredAssetRetirementObligationIncurred100.0

us-gaap:CostsIncurredDevelopmentCosts

us-gaap:CostsIncurredDevelopmentCosts


Costs
Period End2020-12-31
Value14
Percentage of CostsIncurredDevelopmentCosts100.0

us-gaap:CostsIncurredExplorationCosts

us-gaap:CostsIncurredExplorationCosts


Costs
Period End2020-12-31
Value0.105
Percentage of CostsIncurredExplorationCosts100.0

us-gaap:DebtorReorganizationItemsEmployeeRelatedCharges us-gaap:AwardType

us-gaap:DebtorReorganizationItemsEmployeeRelatedCharges

oas:A2020IncentiveCompensationProgram


Debtor
Period End2020-12-31
Value4300000.0
Percentage of DebtorReorganizationItemsEmployeeRelatedCharges100.0

us-gaap:DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees

us-gaap:DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees


Debtor
Period End2020-11-19
Value16
Percentage of DebtorReorganizationItemsLegalAndAdvisoryProfessionalFees100.0

us-gaap:DeferredFederalIncomeTaxExpenseBenefit

us-gaap:DeferredFederalIncomeTaxExpenseBenefit


Deferred
Period End2020-12-31
Value-2.918
Percentage of DeferredFederalIncomeTaxExpenseBenefit100.0

us-gaap:DeferredStateAndLocalIncomeTaxExpenseBenefit

us-gaap:DeferredStateAndLocalIncomeTaxExpenseBenefit


Deferred
Period End2020-12-31
Value-0.529
Percentage of DeferredStateAndLocalIncomeTaxExpenseBenefit100.0

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DerivativeGainLossOnDerivativeNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-267.037-181.515-84.615-5.071-37.187285-71.3744734-117.611268-48.544-120.285-71.116-123.954-54.315056-49.69320-90.8461499103-39.42447306103-65.57-17.6036.406-39.81712-14.6120.596-22.44174-18.586-65.517127-31.666-7.478-3.124
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:ConsolidatedEntities

srt:ParentCompany


Derivative
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-5.0710.00.00.00.00.00.00.00.00.00.00.0
Percentage of DerivativeGainLossOnDerivativeNet100.0-0.00.00.0-0.00.0-0.0-0.0-0.0-0.0-0.00.0

us-gaap:DerivativeNonmonetaryNotionalAmountVolume oas:AllExchanges, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNonmonetaryNotionalAmountVolume

oas:NYMEXWTI, srt:CrudeOil, oas:TwoThousandTwentyFourFixedPriceSwap


Derivative
Period End2021-05-17
Value0.434
Percentage of DerivativeNonmonetaryNotionalAmountVolume100.0

oas:NYMEXWTI, srt:CrudeOil, oas:TwoThousandTwentyThreeFixedPriceSwap


Derivative
Period End2021-05-17
Value5.265
Percentage of DerivativeNonmonetaryNotionalAmountVolume1213.1

oas:NYMEXWTI, srt:CrudeOil, oas:TwoThousandTwentyTwoFixedPriceSwap


Derivative
Period End2021-05-17
Value6.346
Percentage of DerivativeNonmonetaryNotionalAmountVolume1462.2

us-gaap:DerivativeNonmonetaryNotionalAmountVolume oas:AllExchanges, us-gaap:Energy, us-gaap:DerivativeInstrumentRisk, us-gaap:SubsequentEventType

oas:NYMEXWTI, srt:CrudeOil, oas:TwoThousandTwentyFourTwoWayCollars, us-gaap:SubsequentEvent


Derivative
Period End2021-05-07
Value0.372
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

oas:NYMEXWTI, srt:CrudeOil, oas:TwoThousandTwentyOneTwoWayCollar, us-gaap:SubsequentEvent


Derivative
Period End2021-05-07
Value0.765
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

oas:NYMEXWTI, srt:CrudeOil, oas:TwoThousandTwentyTwoThreeTwoWayCollars, us-gaap:SubsequentEvent


Derivative
Period End2021-05-07
Value4.38
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

oas:NYMEXWTI, srt:CrudeOil, oas:TwoThousandTwentyTwoTwoWayCollars, us-gaap:SubsequentEvent


Derivative
Period End2021-05-07
Value4.163
Percentage of DerivativeNonmonetaryNotionalAmountVolume0.0

us-gaap:DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown us-gaap:PropertyPlantAndEquipmentByType

us-gaap:DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown

oas:ProvedOilAndGasProperties


Disposal
Period End2020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.044000.00.0
Percentage of DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown0.00.0100.00.00.0

us-gaap:DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown us-gaap:StatementGeographical, us-gaap:PropertyPlantAndEquipmentByType

oas:DelawareBasin, oas:ProvedOilAndGasProperties


Disposal
Period End2020-09-302020-06-302020-03-31
Value0.00.0637
Percentage of DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown0.00.014.5

oas:WillistonBasin, oas:ProvedOilAndGasProperties


Disposal
Period End2020-09-302020-06-302020-03-31
Value0.00.03800
Percentage of DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown0.00.086.4

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance

us-gaap:EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance


Effective
Period End2020-12-31
Value-18.09
Percentage of EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance100.0

us-gaap:EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense

us-gaap:EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense


Effective
Period End2020-12-31
Value-1.68
Percentage of EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense100.0

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther


Effective
Period End2020-12-31
Value0.07
Percentage of EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther100.0

us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes

us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes


Effective
Period End2020-12-31
Value2.78
Percentage of EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes100.0

us-gaap:EquityFairValueAdjustment

us-gaap:EquityFairValueAdjustment


Equity
Period End2020-11-19
Value965
Percentage of EquityFairValueAdjustment100.0

us-gaap:ExplorationExpense

us-gaap:ExplorationExpense


Exploration
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.250.4230.7251.431.1684.2890.6520.8870.833.731220.6170.7697.590.8541.6671.4890.5930.4890.340.3630.1170.3271.0820.8431.1091.10.4750.38-0.4520.4630.3921.8570.0790.3360.02.8351.340.0540.2590.0320.261-0.0060.024
Percentage of ExplorationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExplorationExpense us-gaap:ConsolidatedEntities

srt:ParentCompany


Exploration
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.7250.00.00.00.00.00.00.00.00.00.00.0
Percentage of ExplorationExpense100.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ExtinguishmentOfDebtAmount us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ExtinguishmentOfDebtAmount

us-gaap:RevolvingCreditFacility, oas:SeniorSecuredRevolvingLineofCredit, us-gaap:LineOfCredit


Extinguishment
Period End2020-11-19
Value60
Percentage of ExtinguishmentOfDebtAmount100.0

us-gaap:RevolvingCreditFacility, oas:SeniorSecuredSuperpriorityDebtorInPossessionRevolvingCreditAgreement, us-gaap:LineOfCredit


Extinguishment
Period End2020-11-19
Value300
Percentage of ExtinguishmentOfDebtAmount495.0

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestExpense


Finance
Period End2020-12-312019-12-312019-09-302019-06-30
Value11000.064000.072000.069000.0
Percentage of FinanceLeaseInterestExpense100.0100.0100.0100.0

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeaseInterestPaymentOnLiability


Finance
Period End2020-12-31
Value9000.0
Percentage of FinanceLeaseInterestPaymentOnLiability100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value415000.0311000.0202000.0727000.0614000.0648000.0959000.0482000.0685000.0256000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


Finance
Period End2020-12-312019-12-312019-09-302019-06-30
Value153000.0633000.0694000.0650000.0
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfBusiness us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:GainLossOnSaleOfBusiness

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:AdditionalPermianBasinSale


Gain
Period End2021-06-30
Value13
Percentage of GainLossOnSaleOfBusiness100.0

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:PermianBasinSale


Gain
Period End2021-06-30
Value222
Percentage of GainLossOnSaleOfBusiness1624.1

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:PrimaryPermianBasinSale


Gain
Period End2021-06-30
Value208
Percentage of GainLossOnSaleOfBusiness1524.1

us-gaap:GainLossOnSaleOfOilAndGasProperty us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:GainLossOnSaleOfOilAndGasProperty

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:DivestitureOfCertainGasPropertiesInSouthNessonAreaOfWillistonBasin


Gain
Period End2020-09-302020-06-30
Value1.50.2
Percentage of GainLossOnSaleOfOilAndGasProperty100.0100.0

us-gaap:GainLossOnSaleOfProperties

us-gaap:GainLossOnSaleOfProperties


Gain
Period End2021-06-302017-09-302016-09-302015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value320.00.0060.1720.00.00.0433.641830.00.00.0
Percentage of GainLossOnSaleOfProperties100.00.0100.0100.00.00.0100.0100.0100.00.00.00.0

us-gaap:GainLossOnSaleOfProperty

us-gaap:GainLossOnSaleOfProperty


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2220.0880.0111.473-1.04711-0.505-0.752-0.276-2.922-10.236361.9540.01.7740.00.00.0020.006-1.311-0.1720.1720.00.0-0.0770.0433.641830.00.00.00.0
Percentage of GainLossOnSaleOfProperty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.00.00.00.00.0

us-gaap:GainLossOnSaleOfProperty us-gaap:ConsolidatedEntities

srt:ParentCompany


Gain
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.4730.00.00.00.00.00.00.0
Percentage of GainLossOnSaleOfProperty100.0-0.0-0.0-0.0-0.0-0.00.00.0

us-gaap:GainLossRelatedToLitigationSettlement

us-gaap:GainLossRelatedToLitigationSettlement


Gain
Period End2020-09-302019-12-312019-09-30
Value-22750000.00-20000000.0
Percentage of GainLossRelatedToLitigationSettlement100.00.0100.0

us-gaap:GainLossRelatedToLitigationSettlement us-gaap:ConsolidatedEntities

srt:ParentCompany


Gain
Period End2020-09-30
Value-22750000.0
Percentage of GainLossRelatedToLitigationSettlement100.0

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf


Impairment
Period End2020-09-30
Value1.017
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf100.0

us-gaap:ImpairmentOfLongLivedAssetsToBeDisposedOf us-gaap:ConsolidatedEntities

srt:ParentCompany


Impairment
Period End2020-09-30
Value1.017
Percentage of ImpairmentOfLongLivedAssetsToBeDisposedOf100.0

us-gaap:ImpairmentOfOilAndGasProperties

us-gaap:ImpairmentOfOilAndGasProperties


Impairment
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.0020.0032.5782.31948239.6040.00.0240.6290.00.03840.0930.8660.1393.22.6820.7170.3820.0233.562210.08195.321441.4390.0420.7620.4060.0560.2080.4980.9740.0362.2030.3680.2970.3961.5361.3810.1580.8257.907
Percentage of ImpairmentOfOilAndGasProperties100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairmentOfOilAndGasProperties us-gaap:ConsolidatedEntities

srt:ParentCompany


Impairment
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1.120.00.00.00.00.00.00.00.00.00.00.0
Percentage of ImpairmentOfOilAndGasProperties43.40.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ImpairmentOfOilAndGasProperties us-gaap:PropertyPlantAndEquipmentByType

oas:MidstreamAssets


Impairment
Period End2020-09-302020-06-302020-03-312019-06-302019-03-31
Value1.10.61080.00.0
Percentage of ImpairmentOfOilAndGasProperties42.725.92.20.00.0

oas:UnprovedOilAndGasProperties


Impairment
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.90.82914.70.00.10.6110.1195.35.11.40.0420.80.4380.0560.2080.4980.9930.0362.2030.40.2870.3961.51.4
Percentage of ImpairmentOfOilAndGasProperties34.934.56.048.90.0416.795.455.2125.099.999.611.397.3100.0105.0107.9100.0100.0100.0102.0100.0100.0108.796.6100.097.7101.4

us-gaap:ImpairmentOfOilAndGasProperties us-gaap:StatementGeographical, us-gaap:PropertyPlantAndEquipmentByType

oas:WillistonBasinAndDelawareBasin, us-gaap:PropertyPlantAndEquipmentOtherTypes


Impairment
Period End2020-09-30
Value0.0
Percentage of ImpairmentOfOilAndGasProperties0.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ConsolidatedEntities

us-gaap:IncomeLossFromEquityMethodInvestments

srt:ParentCompany


Income
Period End2020-09-30
Value52
Percentage of IncomeLossFromEquityMethodInvestments100.0

us-gaap:IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

us-gaap:IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance


Income
Period End2020-12-31
Value8.936
Percentage of IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance100.0

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate


Income
Period End2020-12-31
Value-10.376
Percentage of IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate100.0

us-gaap:IncomeTaxReconciliationMinorityInterestIncomeExpense

us-gaap:IncomeTaxReconciliationMinorityInterestIncomeExpense


Income
Period End2020-12-31
Value830000.0
Percentage of IncomeTaxReconciliationMinorityInterestIncomeExpense100.0

us-gaap:IncomeTaxReconciliationNondeductibleExpenseOther

us-gaap:IncomeTaxReconciliationNondeductibleExpenseOther


Income
Period End2020-12-31
Value-36000.0
Percentage of IncomeTaxReconciliationNondeductibleExpenseOther100.0

us-gaap:IncomeTaxReconciliationStateAndLocalIncomeTaxes

us-gaap:IncomeTaxReconciliationStateAndLocalIncomeTaxes


Income
Period End2020-12-31
Value-1.373
Percentage of IncomeTaxReconciliationStateAndLocalIncomeTaxes100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1862-24.57344-50.523-106.1453058-73.1836-24.1929.45941-0.24483215.0986.0628-23.95746-64.05612-61.50919-42.341-32.06517622925333315-2.373392910-11.5044.20851-7.4489.03-5.77
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidExpense

us-gaap:IncreaseDecreaseInPrepaidExpense


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-2.684-1.0892.976-1.3588.1-0.6353.828-0.235-2.413-1.5053.55-0.623-0.081-0.4921.661-1.0870.546-0.2821.4630.255-1.182-0.241-1.192.756-1.502-1.8920.024.463-15.543143.0160.7734.695-0.293-2.3553.509-1.469-0.0311.3030.0430.733-0.479-0.355-0.354
Percentage of IncreaseDecreaseInPrepaidExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsCapitalized

us-gaap:InterestCostsCapitalized


Interest
Period End2020-12-31
Value0.1
Percentage of InterestCostsCapitalized100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2020-12-312019-12-312019-09-302019-06-30
Value1.9068.2728.5312
Percentage of LeaseCost100.0100.0100.0100.0

us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest us-gaap:Ownership

us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest

oas:OasisMidstreamPartnersLP


Limited
Period End2021-03-30
Value77.0
Percentage of LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest100.0

us-gaap:LitigationSettlementAmountAwardedToOtherParty us-gaap:LitigationCase, us-gaap:LitigationStatus

us-gaap:LitigationSettlementAmountAwardedToOtherParty

oas:MiradaLitigation, us-gaap:SettledLitigation


Litigation
Period End2020-09-28
Value42
Percentage of LitigationSettlementAmountAwardedToOtherParty100.0

us-gaap:LongTermDebtWeightedAverageInterestRateOverTime us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtWeightedAverageInterestRateOverTime

us-gaap:RevolvingCreditFacility, oas:OMPRevolvingLineofCredit, us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-09-30
Value2.62.11.9
Percentage of LongTermDebtWeightedAverageInterestRateOverTime100.0100.0100.0

us-gaap:RevolvingCreditFacility, oas:SeniorSecuredRevolvingLineofCredit, us-gaap:LineOfCredit


Long
Period End2021-06-302021-03-312020-09-30
Value3.44.33.4
Percentage of LongTermDebtWeightedAverageInterestRateOverTime130.8204.8178.9

us-gaap:NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1

us-gaap:NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1


Noncash
Period End2021-06-302021-03-31
Value02900000.0
Percentage of NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived10.0100.0

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance


Noncontrolling
Period End2021-06-302017-12-31
Value8618
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance100.0100.0

us-gaap:NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Noncontrolling
Period End2021-06-302017-12-31
Value8618
Percentage of NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2020-12-312019-12-312019-09-302019-06-30
Value0.7512.884.9866.799
Percentage of OperatingLeaseCost100.0100.0100.0100.0

us-gaap:OperatingLeaseExpense

us-gaap:OperatingLeaseExpense


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value3435172929495850565856484444434544
Percentage of OperatingLeaseExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseExpense us-gaap:ConsolidatedEntities

srt:ParentCompany


Operating
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value400.00.00.00.00.00.00.00.00.00.00.0
Percentage of OperatingLeaseExpense139.50.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingLeaseExpense us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value-16.115-15.804-8.256-16.044
Percentage of OperatingLeaseExpense-47.0-44.8-27.9-32.2

us-gaap:OperatingLeaseExpense us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value50513765
Percentage of OperatingLeaseExpense147.0144.8127.9132.2

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2020-12-31
Value1.992
Percentage of OperatingLeasePayments100.0

us-gaap:PartnersCapitalAccountRedemptions

us-gaap:PartnersCapitalAccountRedemptions


Partners
Period End2021-06-29
Value87
Percentage of PartnersCapitalAccountRedemptions100.0

us-gaap:PaymentsForFees

us-gaap:PaymentsForFees


Payments
Period End2021-03-30
Value6100000.0
Percentage of PaymentsForFees100.0

us-gaap:PaymentsForLegalSettlements us-gaap:LitigationCase, us-gaap:LitigationStatus

us-gaap:PaymentsForLegalSettlements

oas:MiradaLitigation, us-gaap:SettledLitigation


Payments
Period End2020-11-19
Value20
Percentage of PaymentsForLegalSettlements100.0

us-gaap:PaymentsForProceedsFromDerivativeInstrumentInvestingActivities

us-gaap:PaymentsForProceedsFromDerivativeInstrumentInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value55220.076-139.049-5.02367.46-8.0950.9397.96-6.401-11.786-30.477-73.313-78.974-78.1-104.077-109.259-31.54711112.2392.9988.067-1.246-1.686-3.761-5.2491.1741.291-0.990.1794.140.5120.0610.0
Percentage of PaymentsForProceedsFromDerivativeInstrumentInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value8.595110.070.1020.00.20.370.4390.0436.2120.866.5750.2152.6180.0960.00.00.3168.060.00.75111-0.0043.5910.00.00.0140.0850.01.192182.9730.0250.0577.2090.7210.0258.6530.00.0100.00.375
Percentage of PaymentsOfDebtIssuanceCosts100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value0.0250.3182.3080.2310.320.0444.2610.040.7420.0436.0210.0470.7310.0325.4190.0550.7550.4881.0320.1780.8390.4121.520.0691.9250.293.0250.1421.060.2080.1561.8950.0930.0251.1810.040.003
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireLand us-gaap:AssetAcquisition

us-gaap:PaymentsToAcquireLand

oas:A2021WillistonAcquisition


Payments
Period End2021-05-03
Value745
Percentage of PaymentsToAcquireLand100.0

us-gaap:PaymentsToAcquireLand us-gaap:StatementScenario, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

srt:ScenarioForecast, oas:A2021WillistonAcquisition, us-gaap:SubsequentEvent


Payments
Period End2021-07-31
Value745
Percentage of PaymentsToAcquireLand0.0

us-gaap:PaymentsToExploreAndDevelopOilAndGasProperties

us-gaap:PaymentsToExploreAndDevelopOilAndGasProperties


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value63219.8052112214715418828823730730428225420319115696851081271037915322735938136532628023922421121727533617026922617412191
Percentage of PaymentsToExploreAndDevelopOilAndGasProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToMinorityShareholders

us-gaap:PaymentsToMinorityShareholders


Payments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value6.1366.0296.026.0146.0285.7195.4585.1564.9373.7213.5473.3963.450.00.00.00.0
Percentage of PaymentsToMinorityShareholders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:ProceedsFromDerivativeInstrumentInvestingActivities

us-gaap:ProceedsFromDerivativeInstrumentInvestingActivities


Proceeds
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value801395.028.3467.123-9.81713
Percentage of ProceedsFromDerivativeInstrumentInvestingActivities100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromDerivativeInstrumentInvestingActivities us-gaap:Energy, us-gaap:DerivativeInstrumentRisk

srt:CrudeOil, oas:ThreeWayCostlessCollarContracts


Proceeds
Period End2020-11-192020-09-302020-06-30
Value373725
Percentage of ProceedsFromDerivativeInstrumentInvestingActivities0.046.718.2

us-gaap:ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:PrimaryPermianBasinSale


Proceeds
Period End2021-05-20
Value375
Percentage of ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries100.0

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:WellServicesExit


Proceeds
Period End2021-03-22
Value2.6
Percentage of ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries0.0

us-gaap:ProceedsFromIncomeTaxRefunds

us-gaap:ProceedsFromIncomeTaxRefunds


Proceeds
Period End2020-12-31
Value28000.0
Percentage of ProceedsFromIncomeTaxRefunds100.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt


Proceeds
Period End2021-06-302021-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-09-302014-12-312013-12-312012-12-312011-12-312011-09-302011-06-302011-03-31
Value4004500.00.00.00.00.00.00.00.00.04000.00.0400
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt100.0100.00.00.00.00.00.00.00.00.00.0100.00.00.0100.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:OasisSeniorNotes, us-gaap:UnsecuredDebt


Proceeds
Period End2021-06-09
Value393
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0

oas:SeniorNotesDueApril12029800Percent, us-gaap:UnsecuredDebt


Proceeds
Period End2021-03-30
Value442
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0

us-gaap:ProceedsFromIssuanceOfWarrants

us-gaap:ProceedsFromIssuanceOfWarrants


Proceeds
Period End2020-11-19
Value23
Percentage of ProceedsFromIssuanceOfWarrants100.0

us-gaap:ProceedsFromLongTermLinesOfCredit

us-gaap:ProceedsFromLongTermLinesOfCredit


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value21015929390325453314737584207255664631470398280238246572476145214122981751452502701000.0440160
Percentage of ProceedsFromLongTermLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value6000.000-26000.0939000.0-900000.0-431000.0-1669000.003000.0-90000.0000-55000.000000000000-176000.00000
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.00.00.0100.0100.0100.0100.0100.00.0100.0100.00.00.00.0100.00.00.00.00.00.00.00.00.00.00.00.0100.00.00.00.00.0

us-gaap:ProceedsFromSaleOfOilAndGasPropertyAndEquipment

us-gaap:ProceedsFromSaleOfOilAndGasPropertyAndEquipment


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-04-012015-12-312014-03-05
Value3672.6861.4081.967111.337410.00.00.23301.7740.0120.997324
Percentage of ProceedsFromSaleOfOilAndGasPropertyAndEquipment100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ProductionTaxExpense

us-gaap:ProductionTaxExpense


Production
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value16165.938136.764192628282929383431272118201614141015162016263434313026212219161313118.8737.0856.0835.6373.5192.702
Percentage of ProductionTaxExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductionTaxExpense us-gaap:ConsolidatedEntities

srt:ParentCompany


Production
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value130.00.00.00.00.00.00.00.00.00.00.0
Percentage of ProductionTaxExpense100.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReorganizationItems

us-gaap:ReorganizationItems


Reorganization
Period End2020-11-192020-09-30
Value78649
Percentage of ReorganizationItems100.0100.0

us-gaap:ReorganizationItems us-gaap:ConsolidatedEntities

srt:ParentCompany


Reorganization
Period End2020-09-30
Value49
Percentage of ReorganizationItems100.0

us-gaap:RepaymentsOfLinesOfCredit us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RevolvingCreditFacility, oas:OMPRevolvingLineofCredit, us-gaap:LineOfCredit


Repayments
Period End2021-03-30
Value204
Percentage of RepaymentsOfLinesOfCredit100.0

us-gaap:RepaymentsOfLongTermLinesOfCredit

us-gaap:RepaymentsOfLongTermLinesOfCredit


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value231635114531523313725756573686276943908756453031882414043161752875427318548010020602752640.00.00.0
Percentage of RepaymentsOfLongTermLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:RepaymentsOfUnsecuredDebt

us-gaap:RepaymentsOfUnsecuredDebt


Repayments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0.020.068450.00.00.00.150.0470.00.00.00.00.037834220.00.00.00.0
Percentage of RepaymentsOfUnsecuredDebt100.00.0100.0100.00.00.00.0100.0100.00.00.00.00.00.0100.0100.0100.00.00.00.00.0

us-gaap:ResultsOfOperationsIncomeTaxExpense us-gaap:ProductOrService

us-gaap:ResultsOfOperationsIncomeTaxExpense

us-gaap:OilAndGas


Results
Period End2020-12-31
Value9.648
Percentage of ResultsOfOperationsIncomeTaxExpense100.0

us-gaap:ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts us-gaap:ProductOrService

us-gaap:ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts

us-gaap:OilAndGas


Results
Period End2020-12-31
Value31
Percentage of ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts100.0

us-gaap:ResultsOfOperationsProductionOrLiftingCosts us-gaap:ProductOrService

us-gaap:ResultsOfOperationsProductionOrLiftingCosts

us-gaap:OilAndGas


Results
Period End2020-12-31
Value32
Percentage of ResultsOfOperationsProductionOrLiftingCosts100.0

us-gaap:ResultsOfOperationsTransportationCosts

us-gaap:ResultsOfOperationsTransportationCosts


Results
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value20159.1242023293232283432302221171512
Percentage of ResultsOfOperationsTransportationCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ResultsOfOperationsTransportationCosts us-gaap:ConsolidatedEntities

srt:ParentCompany


Results
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value310.00.00.00.00.00.00.00.00.00.00.0
Percentage of ResultsOfOperationsTransportationCosts156.10.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResultsOfOperationsTransportationCosts us-gaap:ConsolidationItems

us-gaap:IntersegmentElimination


Results
Period End2021-06-302021-03-312020-06-302020-03-31
Value-12.302-12.394-7.415-13.25
Percentage of ResultsOfOperationsTransportationCosts-60.1-78.9-31.2-45.0

us-gaap:ResultsOfOperationsTransportationCosts us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, oas:ExplorationAndProduction


Results
Period End2021-06-302021-03-312020-06-302020-03-31
Value32283142
Percentage of ResultsOfOperationsTransportationCosts160.1178.9131.2145.0

us-gaap:SaleOfStockConsiderationReceivedOnTransaction us-gaap:SubsidiarySaleOfStock

us-gaap:SaleOfStockConsiderationReceivedOnTransaction

oas:PublicStockOffering


Sale
Period End2021-06-29
Value86
Percentage of SaleOfStockConsiderationReceivedOnTransaction100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost

oas:PerformanceShareUnitAwards


Share
Period End2020-12-31
Value4700000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost100.0

us-gaap:PhantomShareUnitsPSUs


Share
Period End2020-12-31
Value700000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost14.9

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

oas:PerformanceShareUnitAwards


Share
Period End2020-09-30
Value0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.0

us-gaap:PhantomShareUnitsPSUs


Share
Period End2020-09-30
Value0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.0

us-gaap:RestrictedStock


Share
Period End2020-09-30
Value0.02
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodIntrinsicValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodIntrinsicValue

oas:LeverageStockUnits, oas:A2020IncentiveCompensationProgram


Share
Period End2021-06-302021-03-31
Value7.8670.93
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodIntrinsicValue100.0100.0

oas:PerformanceShareUnitAwards, oas:A2020IncentiveCompensationProgram


Share
Period End2021-06-302021-03-31
Value63.9556.34
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodIntrinsicValue813.679.4

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

oas:PerformanceShareUnitAwards


Share
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0-0.212.770006.800012.71
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.0100.00.00.00.0100.00.00.00.0100.0

us-gaap:PhantomShareUnitsPSUs


Share
Period End2020-09-30
Value0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0

us-gaap:RestrictedStock


Share
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value37.350-0.33.36-0.01006.620.030.560.039.58-0.05-0.16-0.1115.350.021.270.024.321.2-0.020.0113.09-0.460.340.1242.55
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.00.0142.9121.30.00.00.097.40.00.00.075.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1.849.840016.690018.57
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.00.00.0-0.0602.50.00.0273.1

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

oas:PerformanceShareUnitAwards


Share
Period End2020-09-30
Value0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0

us-gaap:PhantomShareUnitsPSUs


Share
Period End2020-12-312020-09-30
Value12.21-0.65
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.00.0

us-gaap:RestrictedStock


Share
Period End2020-09-30
Value0.18
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-09-30
Value0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate us-gaap:Range, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate

srt:Maximum, oas:PerformanceShareUnitsAndLeveragedStockUnits


Share
Period End2021-04-132021-02-112021-01-18
Value50.060.060.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate100.0100.0100.0

srt:Minimum, oas:PerformanceShareUnitsAndLeveragedStockUnits


Share
Period End2021-04-132021-02-112021-01-18
Value45.055.055.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate90.091.791.7

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate us-gaap:Range, us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

srt:Maximum, oas:PerformanceShareUnitsAndLeveragedStockUnits


Share
Period End2021-04-132021-02-112021-01-18
Value0.60.30.3
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate100.0100.0100.0

srt:Maximum, us-gaap:PerformanceShares


Share
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.534500.0155000.025600
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate0.00.00.00.00.00.00.00.0

srt:Minimum, oas:PerformanceShareUnitsAndLeveragedStockUnits


Share
Period End2021-04-132021-02-112021-01-18
Value0.30.20.2
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate50.066.766.7

srt:Minimum, us-gaap:PerformanceShares


Share
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.514700.0153000.025500
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate0.00.00.00.00.00.00.00.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage us-gaap:AwardType, us-gaap:Vesting

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

us-gaap:RestrictedStockUnitsRSU, oas:ShareBasedPaymentArrangementTrancheFour


Sharebased
Period End2021-03-31
Value25.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage100.0

us-gaap:RestrictedStockUnitsRSU, us-gaap:ShareBasedCompensationAwardTrancheOne


Sharebased
Period End2021-03-31
Value25.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage100.0

us-gaap:RestrictedStockUnitsRSU, us-gaap:ShareBasedCompensationAwardTrancheThree


Sharebased
Period End2021-03-31
Value25.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage100.0

us-gaap:RestrictedStockUnitsRSU, us-gaap:ShareBasedCompensationAwardTrancheTwo


Sharebased
Period End2021-03-31
Value25.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage100.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:CommonStock


Shares
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value35000.0-252000.0942000.0105000.08000.0686000.03000.064000.03000.0690000.0945000.0-95000.0-2000.0-373000.0-693000.0638000.0-87000.0-207000.0-16000.0-88000.0-6000.0-112000.0235000.0-194000.07000.071000.073000.0-25000.0-5000.0-5000.0-63000.0-3000.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock


Shares
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-35000.0252000.0942000.0105000.08000.0686000.03000.064000.03000.0690000.05000.095000.02000.0373000.05000.050000.087000.0207000.016000.088000.06000.0112000.0-235000.0194000.0-7000.0-71000.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation-100.0-100.0100.0100.0100.0100.0100.0100.0100.0100.00.5-100.0-100.0-100.0-0.77.8-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2020-12-312019-12-312019-09-302019-06-30
Value554000.02239000.01048000.0907000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensation

us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value93000.0-18000.0-2889000.03836000.0445000.0-149000.04360000.0498000.0625000.02758000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-03-312011-12-312011-09-30
Value4.7022.1980.274.9024.9427.1058.679.5669.6068.1087.8987.837.2086.3017.0177.67.2425.6626.1436.5367.436.076.5116.5378.2875.7796.4015.4994.6813.7433.2263.1952.4071.5911.0641.021
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-03-312011-12-312011-09-30
Value4.6881.7090.2395.843.8587.0078.5839.4659.4628.0327.7817.737.1166.2487.0147.5997.2295.656.1436.5367.436.076.5116.5378.2875.7796.4015.4994.6813.7443.2253.1952.4071.5911.0641.021
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation99.777.888.5119.178.198.699.098.998.599.198.598.798.799.2100.0100.099.899.8100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1.0071.0180.0320.0030.0010.0250.00.0030.00.0260.00.0030.0010.013
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-20.520.60.50.00.00.30.00.00.00.40.00.00.00.2

us-gaap:NoncontrollingInterest


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0140.4890.0310.0690.0660.0660.0840.10.1190.0760.1140.10.0660.053
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation0.322.211.51.41.30.91.01.01.20.91.41.30.90.8

us-gaap:StockholdersEquityOther

us-gaap:StockholdersEquityOther


Stockholders
Period End2021-03-312019-06-302019-03-31
Value6000.0217000.0175000.0
Percentage of StockholdersEquityOther100.0100.0100.0

us-gaap:StockholdersEquityOther us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-03-312019-06-302019-03-31
Value6000.0193000.0134000.0
Percentage of StockholdersEquityOther100.088.976.6

us-gaap:TreasuryStockAcquiredAverageCostPerShare

us-gaap:TreasuryStockAcquiredAverageCostPerShare


Treasury
Period End2021-06-30
Value76.3
Percentage of TreasuryStockAcquiredAverageCostPerShare100.0

us-gaap:TreasuryStockSharesAcquired us-gaap:StatementEquityComponents

us-gaap:TreasuryStockSharesAcquired

us-gaap:CommonStock


Treasury
Period End2021-06-30
Value191000.0
Percentage of TreasuryStockSharesAcquired100.0

us-gaap:TreasuryStock


Treasury
Period End2021-06-30
Value191000.0
Percentage of TreasuryStockSharesAcquired100.0

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-06-30
Value14
Percentage of TreasuryStockValueAcquiredCostMethod100.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2021-06-30
Value14
Percentage of TreasuryStockValueAcquiredCostMethod100.0

us-gaap:ValuationAllowanceDeferredTaxAssetChangeInAmount

us-gaap:ValuationAllowanceDeferredTaxAssetChangeInAmount


Valuation
Period End2021-06-302021-03-31
Value-10800000.04900000.0
Percentage of ValuationAllowanceDeferredTaxAssetChangeInAmount100.0100.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


Variable
Period End2020-12-312019-12-312019-09-302019-06-30
Value437000.02456000.01730000.03963000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment us-gaap:AwardType

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

oas:RestrictedStockAwardsandPerformanceStockUnits


Weighted
Period End2021-06-302019-09-302019-03-312018-09-302018-03-31
Value918000.0003220000.01633000.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.00.00.0100.0100.0

us-gaap:WriteOffOfDeferredDebtIssuanceCost us-gaap:CreditFacility, us-gaap:LongtermDebtType

us-gaap:WriteOffOfDeferredDebtIssuanceCost

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit


Write
Period End2020-12-312016-12-312016-09-302016-06-302015-12-312015-09-30
Value1500000.000000
Percentage of WriteOffOfDeferredDebtIssuanceCost100.00.00.00.00.00.0

us-gaap:WriteOffOfDeferredDebtIssuanceCost us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:A2.625PercentSeniorNotesDueSeptember2023, us-gaap:UnsecuredDebt


Write
Period End2020-09-302020-06-302020-03-312019-12-31
Value200000.0200000.0200000.0300000.0
Percentage of WriteOffOfDeferredDebtIssuanceCost0.00.00.00.0

us-gaap:WriteOffOfDeferredDebtIssuanceCost us-gaap:LongtermDebtType

us-gaap:UnsecuredDebt


Write
Period End2020-09-302020-06-302020-03-312019-12-31
Value00800000.0200000.0
Percentage of WriteOffOfDeferredDebtIssuanceCost0.00.00.00.0

oas:AccruedBulkPurchases

oas:AccruedBulkPurchases


Accrued
Period End2021-06-302020-12-312019-12-312018-12-312017-12-312016-12-31
Value338.9675132130.0
Percentage of AccruedBulkPurchases100.0100.0100.0100.0100.00.0

oas:AccruedCapitalCost

oas:AccruedCapitalCost


Accrued
Period End2021-06-302020-12-31
Value4939
Percentage of AccruedCapitalCost100.0100.0

oas:AccruedCapitalCosts

oas:AccruedCapitalCosts


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value391282161546911036119916710649
Percentage of AccruedCapitalCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:AccruedDividendsPayable

oas:AccruedDividendsPayable


Accrued
Period End2021-06-30
Value83
Percentage of AccruedDividendsPayable100.0

oas:AccruedGeneralAndAdministrativeExpense

oas:AccruedGeneralAndAdministrativeExpense


Accrued
Period End2021-06-302020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1235412317191812147.7033.3973.014
Percentage of AccruedGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:AccruedLeaseOperatingExpense

oas:AccruedLeaseOperatingExpense


Accrued
Period End2021-06-302020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1818342626221826189.7867.7943.305
Percentage of AccruedLeaseOperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:AccruedMidstreamOperatingExpense

oas:AccruedMidstreamOperatingExpense


Accrued
Period End2021-06-302020-12-31
Value1715
Percentage of AccruedMidstreamOperatingExpense100.0100.0

oas:AccruedWellServicesandMidstreamOperatingExpense

oas:AccruedWellServicesandMidstreamOperatingExpense


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value151717152.365134.845
Percentage of AccruedWellServicesandMidstreamOperatingExpense100.0100.0100.0100.0100.0100.0100.0

oas:AdvancesFromJointInterestPartnersCurrent

oas:AdvancesFromJointInterestPartnersCurrent


Advances
Period End2021-06-302021-03-312020-12-312020-11-192020-11-182020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2.3342.6612.7232.7250.174.2844.9414.5983.6494.0765.0725.143.8783.9834.8884.9165.0955.8166.8387.5975.1915.4164.394.6475.3776.215.7886.6166.7766.911012131519212628149.064118.9523.101
Percentage of AdvancesFromJointInterestPartnersCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

oas:AdvancesFromJointInterestPartnersCurrent us-gaap:FreshStartAdjustmentsTypeOfFreshStartAdjustment

oas:ReorganizationAdjustments


Advances
Period End2020-11-19
Value2.555
Percentage of AdvancesFromJointInterestPartnersCurrent93.8

oas:AssetRetirementObligationFreshStartAdjustment

oas:AssetRetirementObligationFreshStartAdjustment


Asset
Period End2020-11-19
Value-11681000.0
Percentage of AssetRetirementObligationFreshStartAdjustment100.0

oas:AssetRetirementObligationsFairValueAssumptionsRiskFreeRate

oas:AssetRetirementObligationsFairValueAssumptionsRiskFreeRate


Asset
Period End2020-11-19
Value8.5
Percentage of AssetRetirementObligationsFairValueAssumptionsRiskFreeRate100.0

oas:AssetRetirementObligationsFairValueMeasurementsInflationFactor

oas:AssetRetirementObligationsFairValueMeasurementsInflationFactor


Asset
Period End2020-11-19
Value2.0
Percentage of AssetRetirementObligationsFairValueMeasurementsInflationFactor100.0

oas:AssetRetirementObligationsReclassifiedToLiabilitiesSubjectToCompromise

oas:AssetRetirementObligationsReclassifiedToLiabilitiesSubjectToCompromise


Asset
Period End2020-09-30
Value57
Percentage of AssetRetirementObligationsReclassifiedToLiabilitiesSubjectToCompromise100.0

oas:CapitalExpendituresIncreaseDecreasePercent us-gaap:Range, us-gaap:StatementScenario

oas:CapitalExpendituresIncreaseDecreasePercent

srt:Maximum, srt:ScenarioForecast


Capital
Period End2020-12-31
Value0.6
Percentage of CapitalExpendituresIncreaseDecreasePercent100.0

srt:Minimum, srt:ScenarioForecast


Capital
Period End2020-12-31
Value0.5
Percentage of CapitalExpendituresIncreaseDecreasePercent83.3

oas:ConsiderationReceivedFromDivestiture us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

oas:ConsiderationReceivedFromDivestiture

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:PrimaryPermianBasinSale


Consideration
Period End2021-05-20
Value450
Percentage of ConsiderationReceivedFromDivestiture100.0

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, oas:WellServicesExit


Consideration
Period End2021-03-22
Value5.5
Percentage of ConsiderationReceivedFromDivestiture0.0

oas:ContingentConsiderationReceivable us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

oas:ContingentConsiderationReceivable

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Contingent
Period End2021-06-30
Value32
Percentage of ContingentConsiderationReceivable100.0

oas:ContingentConsiderationReceivable us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Contingent
Period End2021-06-30
Value32
Percentage of ContingentConsiderationReceivable100.0

oas:DebtInstrumentCovenantTermsMaximumProFormaLeverageRatio us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:DebtInstrumentCovenantTermsMaximumProFormaLeverageRatio

us-gaap:RevolvingCreditFacility, oas:OasisCreditFacilityFourthAgreement, us-gaap:LineOfCredit


Debt
Period End2021-05-21
Value1.5
Percentage of DebtInstrumentCovenantTermsMaximumProFormaLeverageRatio100.0

oas:DebtInstrumentCovenantTermsMaximumProFormaLeverageRatioSubjectToDefaultAndAvailability us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:DebtInstrumentCovenantTermsMaximumProFormaLeverageRatioSubjectToDefaultAndAvailability

us-gaap:RevolvingCreditFacility, oas:OasisCreditFacilityFourthAgreement, us-gaap:LineOfCredit


Debt
Period End2021-05-21
Value2.0
Percentage of DebtInstrumentCovenantTermsMaximumProFormaLeverageRatioSubjectToDefaultAndAvailability100.0

oas:DebtInstrumentCovenantTermsMinimumProFormaLeverageRatioSubjectToDefaultAndAvailability us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:DebtInstrumentCovenantTermsMinimumProFormaLeverageRatioSubjectToDefaultAndAvailability

us-gaap:RevolvingCreditFacility, oas:OasisCreditFacilityFourthAgreement, us-gaap:LineOfCredit


Debt
Period End2021-05-21
Value1.5
Percentage of DebtInstrumentCovenantTermsMinimumProFormaLeverageRatioSubjectToDefaultAndAvailability100.0

oas:DebtInstrumentCovenantTermsPercentageOfAvailability us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:DebtInstrumentCovenantTermsPercentageOfAvailability

us-gaap:RevolvingCreditFacility, oas:OasisCreditFacilityFourthAgreement, us-gaap:LineOfCredit


Debt
Period End2021-05-21
Value25.0
Percentage of DebtInstrumentCovenantTermsPercentageOfAvailability100.0

oas:DebtorInPossessionFinancingAmountArrangedAmountAvailableToBorrower us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:DebtorInPossessionFinancingAmountArrangedAmountAvailableToBorrower

us-gaap:RevolvingCreditFacility, oas:ExitFacility, us-gaap:LineOfCredit


Debtor
Period End2020-11-19
Value575
Percentage of DebtorInPossessionFinancingAmountArrangedAmountAvailableToBorrower100.0

oas:DebtorInPossessionFinancingConsentingLendersClaimPercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

oas:DebtorInPossessionFinancingConsentingLendersClaimPercentage

oas:RestatedCreditAgreement, us-gaap:LineOfCredit


Debtor
Period End2020-09-29
Value97.0
Percentage of DebtorInPossessionFinancingConsentingLendersClaimPercentage100.0

oas:DebtorInPossessionFinancingConsentingLendersClaimPerc