RLI


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

Table of contents



us-gaap:CommonStockValue
us-gaap:ConsolidatedEntities

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

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

us-gaap:BenefitsLossesAndExpenses

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestExpenseDebt

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetInvestmentIncome

us-gaap:OperatingExpenses

us-gaap:PremiumsEarnedNet
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:Revenues

us-gaap:Assets
us-gaap:ConsolidatedEntities
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:Liabilities
us-gaap:ConsolidatedEntities
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:ConsolidatedEntities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
us-gaap:ConsolidatedEntities

us-gaap:AmortizationOfIntangibleAssets
us-gaap:Range

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities

us-gaap:Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:EquitySecuritiesFvNi
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherAssets

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:EquityMethodInvestmentNonconsolidatedInvestee
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue
us-gaap:ConsolidatedEntities

us-gaap:AdditionalPaidInCapitalCommonStock
us-gaap:ConsolidatedEntities

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:ConsolidatedEntities
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValue
us-gaap:ConsolidatedEntities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

rli:CashFlowFromStockOptionExercises

rli:ComprehensiveEarningsPerShareBasic

rli:ComprehensiveEarningsPerShareDiluted
us-gaap:FairValueByAssetClass
rli:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsNetInvestmentIncome
us-gaap:FairValueByAssetClass
rli:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsNetRealizedGains
us-gaap:FairValueByAssetClass
rli:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetNetRealizedAndUnrealizedGainsLosses

rli:GeneralCorporateExpenseAndInterestOnDebt

rli:GeneralCorporateExpenses

rli:NetRealizedGainsLosses
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

rli:OtherNonCashReductionsToRightOfUseAssets

rli:PaymentsForOtherInvestingActivities

rli:PolicyAcquisitionCostAmortizationExpenseAndDirectPeriodCosts

rli:ProceedsFromOtherInvestingActivities

rli:ReductionToRightOfUseAssetResultingFromReductionToLeaseLiability

rli:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedInPeriod

rli:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedWeightedAverageGrantDateFairValue
us-gaap:InvestmentType
rli:TaxExpenseBenefitOnInvestments
us-gaap:StatementEquityComponents
rli:TransfersBetweenDeferredCompensationPlanAndTreasuryStock
us-gaap:InvestmentType
rli:UnrealizedGainLossOnEquitySecuritiesStillHeld

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossSellBeforeRecovery

us-gaap:DebtSecuritiesAvailableForSaleChangeInPresentValueExpenseReversal
us-gaap:InvestmentType
us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsDividends

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpense

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent

us-gaap:EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
us-gaap:PlanName

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss
us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementLocation
us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
us-gaap:FairValueByAssetClass, us-gaap:OtherComprehensiveIncomeLocation
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
us-gaap:Range
us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
rli:TypeOfTransaction, us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:InvestmentType
us-gaap:GainOnSaleOfInvestments
rli:TypeOfTransaction, us-gaap:InvestmentType

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends

us-gaap:IncomeTaxReconciliationDeductionsDividends

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

us-gaap:IncomeTaxReconciliationNondeductibleExpense

us-gaap:IncomeTaxReconciliationOtherAdjustments

us-gaap:IncomeTaxReconciliationTaxCreditsInvestment

us-gaap:IncomeTaxReconciliationTaxExemptIncome

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncurredClaimsPropertyCasualtyAndLiability

us-gaap:LeaseCost

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1
rli:TypeOfTransaction, us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:InvestmentType
us-gaap:LossOnSaleOfInvestments
rli:TypeOfTransaction, us-gaap:InvestmentType
rli:TypeOfTransaction, us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:InvestmentType
us-gaap:MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments
rli:TypeOfTransaction, us-gaap:InvestmentType

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments
us-gaap:StatementEquityComponents
us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:PaymentsForLossesAndLossAdjustmentExpense

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities
rli:TypeOfTransaction, us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:InvestmentType
us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments
rli:TypeOfTransaction, us-gaap:InvestmentType

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt
us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:SubleaseIncome

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

us-gaap:UnderwritingIncomeLoss
us-gaap:StatementBusinessSegments

us-gaap:VariableLeaseCost
rli:NAICCreditQualityIndicator, us-gaap:CreditRatingMoodys, us-gaap:CreditRatingStandardPoors, us-gaap:InvestmentType
rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost
us-gaap:FinancialInstrument
us-gaap:InvestmentType
us-gaap:FinancialInstrument
rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost
us-gaap:InvestmentType
us-gaap:FinancialInstrument
rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAmortizedCost
us-gaap:InvestmentType

rli:CostBasisOfInvestmentInAffiliateIncludedInStatutorySurplus

rli:DeferredTaxAssetLeaseLabilities

rli:DeferredTaxLiabilitiesDiscountingOfUnpaidLossesTCJAOffset

rli:DeferredTaxLiabilitiesUnrealizedGainsOnSecurities

rli:DeferredTaxLiabilityLeaseAssets
us-gaap:RetirementPlanType
rli:DefinedContributionPlanSharesPurchasedAverageMarketPrice

rli:FairValueOfInvestmentInAffiliateIncludedInStatutorySurplus

rli:FundsHeld
rli:NAICCreditQualityIndicator, us-gaap:CreditRatingMoodys, us-gaap:CreditRatingStandardPoors, us-gaap:InvestmentType
rli:InvestmentContinuousUnrealizedLossPositionUnrealizedLossPercent
us-gaap:InvestmentType
rli:InvestmentContinuousUnrealizedLossPositionUnrealizedLossesAsPercentOfCost
us-gaap:ConsolidatedEntities
rli:InvestmentInSubsidiaries
us-gaap:ShortdurationInsuranceContractsAccidentYear
rli:LiabilityForAsbestosAndEnvironmentalClaimsCeded
us-gaap:DebtInstrument
rli:LineOfCreditFacilityConditionalExpansionMaximumBorrowingCapacity
dei:LegalEntity
rli:NonRestrictedNetAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
rli:OtherInvestmentsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

rli:PercentageOfFixedIncomePortfolioRatedAOrBetter

rli:PercentageOfReinsuranceRecoverablesFromEntitiesWithFinancialStrengthRatingsOfAOrBetter

rli:PremiumsAndReinsuranceBalancesReceivable

rli:PremiumsAndReinsuranceBalancesReceivableAllowances

rli:ReinsuranceNetLossOnIndividualRiskMaximum

rli:ReinsuranceRecoverableOtherReconcilingItem
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearEight
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearSeven
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearTen
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
rli:ShortDurationInsuranceContractsLiabilityForUnpaidClaimsRecoverableAmountAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented
us-gaap:StatementBusinessSegments

rli:StockholdersEquityUnrestrictedLiquidAssets

rli:ThresholdReinsuranceRecoverableFromIndividualReinsurerAsPercentageOfShareholdersEquity
us-gaap:InvestmentType
rli:UnrealizedLossesAsPercentOfInvestment

us-gaap:AccruedInvestmentIncomeReceivable
us-gaap:InvestmentType

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AociDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossCumulativeGainLossAfterTax
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:ConsolidatedEntities
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:CompensationAndBenefitsTrust
us-gaap:ConsolidatedEntities

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
us-gaap:InvestmentType
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:InvestmentType
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:InvestmentType
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:InvestmentType
us-gaap:FederalHomeLoanBankAdvancesBranchOfFHLBBank
us-gaap:DebtSecuritiesAvailableForSaleRestricted
rli:NAICCreditQualityIndicator, us-gaap:CreditRatingMoodys, us-gaap:CreditRatingStandardPoors, us-gaap:InvestmentType
us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap:FinancialInstrument
us-gaap:InvestmentType
rli:NAICCreditQualityIndicator, us-gaap:CreditRatingMoodys, us-gaap:CreditRatingStandardPoors, us-gaap:InvestmentType
us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:InvestmentType
us-gaap:DebtInstrument
us-gaap:DebtWeightedAverageInterestRate
us-gaap:RetirementPlanType
us-gaap:DeferredCompensationPlanAssets

us-gaap:DeferredIncomeTaxLiabilities
us-gaap:ConsolidatedEntities
us-gaap:DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent

us-gaap:DeferredPolicyAcquisitionCosts

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsPolicyholderLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:ConsolidatedEntities
us-gaap:DueToAffiliateCurrentAndNoncurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:AwardType
us-gaap:PlanName
us-gaap:Ownership
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestments
us-gaap:ConsolidatedEntities
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquitySecuritiesFvNiCost

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments
us-gaap:InvestmentType
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:Range
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:ConsolidatedEntities
us-gaap:IncomeTaxesReceivable

us-gaap:InvestmentsAndCash

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability
us-gaap:ShortdurationInsuranceContractsAccidentYear

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet
us-gaap:ShortdurationInsuranceContractsAccidentYear
us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity
us-gaap:DebtInstrument
us-gaap:LongTermDebtFairValue

us-gaap:LongTermNotesPayable
us-gaap:ConsolidatedEntities

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:ConsolidatedEntities
us-gaap:OtherAssetsMiscellaneous

us-gaap:OtherInvestments
us-gaap:InvestmentType

us-gaap:OtherLiabilities
us-gaap:ConsolidatedEntities
us-gaap:OtherSundryLiabilities

us-gaap:PrepaidReinsurancePremiums
us-gaap:InvestmentType
us-gaap:QualifiedAffordableHousingProjectInvestmentsCommitment

us-gaap:ReinsurancePayable

us-gaap:ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:ReinsuranceRecoverables
us-gaap:CededCreditRisk
us-gaap:CreditRatingAMBest, us-gaap:CreditRatingStandardPoors, us-gaap:CededCreditRisk

us-gaap:ReinsuranceRecoverablesOnPaidLossesAllowance

us-gaap:ReinsuranceRecoverablesOnUnpaidLossesAllowance

us-gaap:RestrictedInvestments

us-gaap:RetainedEarningsUndistributedEarningsFromEquityMethodInvestees

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
rli:InsuranceSecondaryGrouping, us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFive
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearFour
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearNine
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearOne
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearSix
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearThree
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsHistoricalClaimsDurationYearTwo
us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
rli:InsuranceSecondaryGrouping, us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet
rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimAdjustmentExpenseOtherReconcilingItem

us-gaap:ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense
dei:LegalEntity
us-gaap:StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance
us-gaap:ConsolidatedEntities
dei:LegalEntity
us-gaap:StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired

us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount
us-gaap:InvestmentSecondaryCategorization
us-gaap:InvestmentSecondaryCategorization, us-gaap:InvestmentType
us-gaap:InvestmentType

us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost
us-gaap:InvestmentSecondaryCategorization
us-gaap:InvestmentSecondaryCategorization, us-gaap:InvestmentType
us-gaap:InvestmentType

us-gaap:SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue
us-gaap:InvestmentSecondaryCategorization
us-gaap:InvestmentSecondaryCategorization, us-gaap:InvestmentType
us-gaap:InvestmentType
us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersByAffiliationWithRegistrant
us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersDeferredPolicyAcquisitionCosts
us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersByAffiliationWithRegistrant
us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersReservesForUnpaidClaimsAndClaimsAdjustmentExpense
us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersByAffiliationWithRegistrant
us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersUnearnedPremiums

us-gaap:SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts
us-gaap:StatementBusinessSegments

us-gaap:SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves
us-gaap:StatementBusinessSegments

us-gaap:SupplementaryInsuranceInformationUnearnedPremiums
us-gaap:StatementBusinessSegments

us-gaap:UnearnedPremiums
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Intangible Assets Net Excluding Goodwill
Assets
Operating Lease Right Of Use Asset
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Intangible Assets Net Excluding Goodwill
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Stockholders Equity
Common Stock Value
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CommonStockValue ▁▁▁▁▁▁▁▁▁▁▁▁▁██████████████████▄▄▄▄▄▄▄▄▄▄▄▄0.6820.6810.6810.680.6790.6790.6780.6780.6770.6750.6740.6740.67367.18367.07966.9966.97766.966.87566.83766.70566.60266.47466.31466.16366.12166.03365.95765.95465.91965.91332.91232.80632.74832.72832.68632.68332.67532.62732.54232.47332.40832.318NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁45.71545.674NA45.42645.27444.92NA45.34945.21944.887NA44.9444.74244.65NA44.51544.51944.502NA44.49244.42344.361NA44.15344.01943.992NA43.71243.68843.674NA21.77321.6721.623NA21.48621.51421.528NA21.33521.33221.285NA21.0921.22321.372
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁45.22645.178NA45.01444.95144.92NA44.82344.70444.536NA44.444.3144.221NA44.05844.00543.961NA43.84343.72143.597NA43.34243.2143.141NA43.02643.00142.985NA21.42221.31421.272NA21.21821.21321.188NA21.08921.07521.025NA20.93121.02621.176
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▄0.169NANA0.3390.0940.094NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▇▇▇▅█▁▆▅▅▆▃▅▅▄▆▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▇▆▆▆▆▆▆▆▆█▆1.811.621.86000000000000030.942.05-1.361.190.720.911.47-0.460.890.750.281.30.040.60.450.730.510.670.720.780.830.860.710.870.770.830.670.791.761.41.171.181.21.171.321.421.142.251.26NANA1.661.14
us-gaap:EarningsPerShareDiluted ▇▇▇▅█▁▆▅▅▇▃▅▅▄▆▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▇▆▆▆▆▆▆▆▆█▆1.791.61.83999999999999990.932.04-1.361.180.710.891.46-0.460.880.740.271.290.040.590.450.720.50.650.710.760.810.840.70.850.760.820.660.771.731.381.151.161.191.151.31.391.122.221.24NANA1.651.13
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AllocatedShareBasedCompensationExpense NANANA1.30.61.00.91.21.41.01.11.21.31.01.41.01.20.90.91.01.20.91.11.11.10.91.00.91.20.91.01.01.00.80.90.90.90.80.91.01.00.70.80.70.9NA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType us-gaap:RestrictedStockUnitsRSUNANANA0.20.10.2NA0.30.20.1NA0.20.10.1NA0.10.20.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName rli:LongTermIncentivePlan2015█▁1.71.6NANA0.71.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:TitleOfIndividual,us-gaap:AwardType srt:Director,us-gaap:RestrictedStockUnitsRSUNANANA0.10.10.10.10.10.20.1NA0.10.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:BenefitsLossesAndExpenses ▇▇▇█▆▇▇▇▇▆▇▇▆▆▆▇▅▆▆▆▅▅▅▄▄▅▅▄▄▄▄▄▃▃▄▃▃▃▃▃▁▂▂▂▁▂209.999203.921203.508220.047188.468201.995204.703201.968197.753187.393205.182197.862186.875176.679184.701200.769168.98175.409174.309177.09158.834159.846161.623149.67142.108155.465156.933151.976146.458142.649144.846135.554132.199128.251142.744135.024123.301125.826121.941124.92388.537100.536100.978110.26894.011106.778
us-gaap:ComprehensiveIncomeNetOfTax ▆▄▆▅█▁▅▅▆▆▃▄▄▃▅▄▅▄▃▄▅▅▄▄▄▄▅▄▅▅▅▄▃▅▄▅▄▅▅▄▅▄▄▅96.99228.26589.93451.937145.737-74.29847.91747.66568.33194.774-12.88831.67625.576-14.18261.75510.17836.80731.597-2.87515.33248.14353.15634.90719.77212.25323.00347.53520.90155.65946.70644.5935.701-3.57942.413.22946.5130.63838.81458.34811.72647.75232.95430.84758.441NANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest █▇█▆█▁▆▅▆▇▃▆▅▄▅▄▅▅▅▅▅▆▆▆▆▅▆▆▆▅▅▆▅▅▅▅▅▅▅▅▆▅▆▅▆▅102.02189.834102.81751.509114.879-79.36463.21838.94748.82881.741-32.70846.34939.56214.37824.972-0.86234.03626.44338.00631.14242.34145.59345.58251.93754.6544.51346.47948.59452.42341.99140.81255.30943.57635.96928.57536.4836.56841.10941.29938.11971.40538.90650.45641.00352.22934.802
us-gaap:IncomeTaxExpenseBenefit █▇▇▆█▃▆▆▆▇▄▆▆▅▁▅▆▆▆▆▇▇▆▇▇▇▆▇▇▇▆▇▇▆▅▆▆▇▆▇█▇▆▇▇▆20.20616.82219.0129.12222.713-18.0979.846.6238.36116.268-12.0486.9776.3112.162-32.286-2.5967.8286.6155.8198.87913.26414.211.72916.02917.46513.9158.98215.3416.69813.0226.95317.66213.67411.1223.47811.01711.8213.07110.60712.06224.02412.44510.20413.03817.23510.581
us-gaap:InterestExpenseDebt ▂▂▂▂▂▂▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1.9041.9011.9021.9011.9031.8972.0051.8611.8611.8611.8611.8621.8581.8561.8571.8561.8571.8561.8561.8571.8561.8571.8561.8571.8571.8561.8561.8571.8741.8513.5571.5131.5131.5121.5131.5121.5251.51.5131.5131.5121.5121.5131.5121.5131.512
us-gaap:NetIncomeLoss █▇█▆█▁▆▅▆▇▃▆▅▄▆▄▅▅81.81573.01283.80542.38792.166-61.26753.37832.32440.46765.473-20.6639.37233.25112.21657.2581.73426.20819.828NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic █▇█▆█▁▆▅▆▇▃▆▅▄▆▄▅▅▅▅▅▅▅▅▅▅▆▅▅▅▅▆▅▅▅▅▅▅▅▅▆▅▆▅▅▅81.81573.01283.80542.38792.166-61.26753.37832.32440.46765.473-20.6639.37233.25112.21657.2581.73426.20819.82832.18722.26329.07731.39333.85335.90837.18530.59837.49733.25435.72528.96933.85937.64729.90224.84725.09725.46324.74828.03830.69226.05747.38126.46140.25227.96534.99424.221
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted █▇█▆█▁▆▅▆▇▃▆▅▄▆▄▅▅▅▅▅▅▅▅▅▅▆▅▅▅▅▆▅▅▅▅▅▅▅▅▆▅▆▅▅81.81573.01283.80542.38792.166-61.26753.37832.32440.46765.473-20.6639.37233.25112.21657.2581.73426.20819.82832.18722.26329.07731.39333.85335.90837.18530.59837.49733.25435.72528.96933.85937.64729.90224.84725.09725.46324.74828.03830.69226.05747.38127.70640.25227.96534.994NA
us-gaap:NetInvestmentIncome ▆▆▆▆▇███▇▆▇▆▃▃▃▃▂▁▁▂▁▂▂▃▂▂▂▃▃▂▂▂▁▁▃▃▄▄▆▅▄▆▆▇▇▆16.66116.42416.65516.54316.91717.77817.77517.53216.99816.56516.96216.31414.57714.23214.44614.18713.23813.00513.15313.50413.04813.3713.75413.96413.43113.49513.84414.213.98213.58213.43213.59812.84712.88614.49114.22114.82615.29316.24415.95415.1816.30316.67216.76216.76516.6
us-gaap:OperatingExpenses ▇▇█▅▄▄▇▆▆▅▃▄▄▄▆▃▄▄▄▄▄▃▄▃▄▃▅▄▄▃▅▄▃▃▂▃▂▃▃▂▃▂▃▂▁▁20.14818.79621.69116.8513.90614.38118.83316.98216.94816.66711.61214.40814.39813.38518.41211.70113.54613.33514.14313.33813.41212.214.18312.29913.46711.53115.27713.1213.53412.53315.64113.46211.88512.56910.37611.55310.78312.25912.26510.30212.139.61511.42610.1618.178.827
us-gaap:PremiumsEarnedNet █▇▆▅▄▅▅▄▄▄▄▃▃▂▂▁▁▁241.0228.595224.801216.63208.734215.582215.626211.255207.541204.689204.002200.815196.522190.027188.296182.025184.331183.285NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues █▇█▆█▁▇▅▆▆▃▆▅▄▄▄▄▄▅▄▄▄▄▄▄▄▄▄▄▃▄▄▃▃▃▃▂▃▃▃▂▂▂▂▂▂298.08287.331304.451262.811298.247118.117264.754236.904238.113263.82172.271240.624219.337185.891207.853196.247196.21196.914212.305206.351195.984201.688207.332200.946190.572195.784203.278197.655193.017181.215185.439188.299171.142160.721171.394169.645155.746163.989163.958162.329156.056136.826151.66149.623142.814139.327
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets █▇▇▆▅▄▅▅▄▄▃▃▃▃▃▃▂▂▂▃▂▂▂▂▂▂▂▃▃▂▂▂▂▁▂▂▂▂▂▂▂▁▁4280.633972.443938.4853792.5013619.2793378.6113545.7213505.0643375.1093236.8753105.0653073.5223007.8052894.1922947.2442956.522881.5822777.5182777.6332913.5342892.2132759.8542736.5792829.3892815.1852780.5642775.5422933.4832908.9962791.3472740.312886.6372675.6752620.2792644.6322754.1542689.5052678.952695.172794.3632730.2642522.932514.592NANANA
us-gaap:Liabilities █▇▇▆▆▅▅▅▅▄▄▄▃▃▃▃▃▂▂▃▂▂▂▂▂▂▂▃▃▂▂▃▂▁▂▂▂▂▂▂▂▁▁3038.8272817.6542802.5072693.1612567.8212462.9062550.3332505.4442415.1612342.172298.2232201.6662158.0082061.2592093.6462077.3642003.8481929.6431954.0611991.121978.6791887.661913.111946.2381947.2871918.5691930.481999.971989.6011921.7711911.3442032.0591851.0381786.7641848.2691859.7851835.781850.2731876.3181926.8781865.8431703.071723.216NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▇▆▅▄▅▅▄▄▃▃▃▃▃▃▂▂▂▃▂▂▂▂▂▂▂▃▃▂▂▂▂▁▂▂▂▂▂▂▂▁▁4280.633972.443938.4853792.5013619.2793378.6113545.7213505.0643375.1093236.8753105.0653073.5223007.8052894.1922947.2442956.522881.5822777.5182777.6332913.5342892.2132759.8542736.5792829.3892815.1852780.5642775.5422933.4832908.9962791.3472740.312886.6372675.6752620.2792644.6322754.1542689.5052678.952695.172794.3632730.2642522.932514.592NANANA
us-gaap:StockholdersEquity █▇▆▆▅▃▄▄▄▃▁▂▂▂▂▂▂▂▁▃▃▂▁▂▂▂▂▃▃▂▂▂▁▂▁▃▂▂▁▂1241.8031154.7861135.9781099.341051.458915.705995.388999.62959.948894.705806.842871.856849.797832.933853.598879.156877.734847.875823.572922.414913.534872.194823.469883.151867.898861.995845.062933.513919.395869.576828.966854.578824.637833.515796.363894.369853.725828.677818.852867.485NANA791.376NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ██▆▆▇▄▄▆▃▃▃▅▄▃▃▃▃▃▂▂▃▂▂▃▃▃▃▇▃▃▄▇▂▃▄▃▃▆▇▁▁▁▁95.45794.93562.21770.58984.79742.70146.20364.04824.83425.18130.1459.46934.10228.92724.27126.87721.35528.14418.26913.9729.63914.56911.08128.18827.08731.51430.6277.03727.23420.61839.46987.39812.75722.37144.31431.30132.17570.30681.1840.00.00.00.0NA0.00.0
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ██▅▆▇▃▃▅▁▁▂▄▂▁▁▁95.45794.93562.21770.58984.79742.70146.20364.04824.83425.18130.1459.46934.10228.92724.27126.877NANA18.269NANANA11.081NANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ██▇▇▇▆▆▆▅▅▄▄▄▃▃▃▂▂▂▂▂▁▁71.92870.08968.68267.55565.76264.32262.70360.29958.3356.32254.27552.41851.02649.3547.67645.92744.99943.49341.99943.01141.05439.9138.447NANANA34.365NANANA41.491NANANA45.603NANANA45.647NANANA38.703NANANA
us-gaap:AmortizationOfIntangibleAssets ▁▄▄▄▄▄▄▄▄▄▄▄▄▄▄██████████0.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.2NANANANANANANANANANA0.20.2NANANANANANANANANA
 us-gaap:AmortizationOfIntangibleAssets us-gaap:Range srt:Maximum▄0.1NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PropertyPlantAndEquipmentNet ▇▇▇▇▇▇▇▇▇██████████▇▇▇▆▆▆▅▅▅▆▅▅▄▄▃▃▂▁▁▁▁▁▁▁50.92550.4751.40652.11352.3552.74153.12152.62653.5854.12154.69255.46956.01956.15355.84955.7756.54756.17354.60653.64352.60549.65847.10245.03843.40742.45842.54942.442.93542.10740.26136.00734.49131.46427.98725.21820.7119.16820.10419.50219.70718.68918.37NANANA
us-gaap:Goodwill ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▃▃▃▄▄▄▄██46.06246.06246.06246.06246.06246.06246.06246.06246.06246.06246.06246.06246.06246.06249.65749.65749.65751.2751.2751.2751.2758.49658.496NANANA58.496NANANANANANANANANANANANANA56.47526.21426.214NANANA
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill ▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄7.57.57.57.57.57.57.57.57.57.57.57.57.57.57.57.57.57.57.5NANA7.57.5NANANA8.009NANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▁▁▁▁▁▁▂▂▂▂▂▂▂▂▃▄▅▇▇███▇7.527.5557.6577.7597.8617.9638.0658.1668.2688.378.4728.5648.6318.7319.6459.7710.92512.89513.10113.30813.51513.73612.798NANANA14.199NANANANANANANANANANANANANANANANANANANA
us-gaap:FiniteLivedIntangibleAssetsNet ▁▁▁▁▁▁▂▂▂▂▂▂▂▂▃▄▅▇▇███▇0.020.0550.1570.2590.3610.4630.5650.6660.7680.870.9721.0641.1311.2312.1452.273.4255.3955.6015.8086.0156.2365.298NANANA6.19NANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetIncludingGoodwill ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▃▃▃▄▄▄▄▇▇▇▇▇▇▇▇██████▃53.58253.61753.71953.82153.92354.02554.12754.22854.3354.43254.53454.62654.69354.79359.30259.42760.58264.16564.37164.57864.78572.23271.29472.02672.24972.47272.69574.17274.40774.64174.87675.1475.46375.78776.11359.78NANA60.482NANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▂▃▄▅▅▇██12.73514.95216.217.38518.64819.88922.323.624.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EquitySecuritiesFvNi ██▇▅▄▁▅▄▄▂▁▃566.87555.209524.006455.956422.198356.403460.63428.297421.801388.281340.483394.375NANA400.492NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DeferredIncomeTaxLiabilitiesNet ▇▇▇▆▅▁▅▅▄▃▁▃▂▃▄█▇▆▅██▇▅▅▆82.1174.62480.23566.00857.42126.54656.72755.9150.48739.67224.23838.2636.43240.23453.76884.98279.86872.19264.49485.15286.9376.18663.99360.58368.462NA82.285NANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▁▂██4.2594.4245.9155.904NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▁▁██2.3892.3344.4244.424NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▁▁██0.820.8022.3342.334NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive ▁▁██0.2420.2420.8020.802NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive ▁▁██0.3230.3210.5630.564NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity █▇▆▆▅▃▄▄▄▃▁▂▂▂▂▂▂▂▁▃▃▂▁▂▂▂▂▃▃▂▂▂▁▂▁▃▂▂▁▂1241.8031154.7861135.9781099.341051.458915.705995.388999.62959.948894.705806.842871.856849.797832.933853.598879.156877.734847.875823.572922.414913.534872.194823.469883.151867.898861.995845.062933.513919.395869.576828.966854.578824.637833.515796.363894.369853.725828.677818.852867.485NANA791.376NANANA
us-gaap:CommonStockValue ▁▁▁▁▁▁▁▁▁▁▁▁▁██████████████████▄▄▄▄▄▄▄▄▄▄▄▄0.6820.6810.6810.680.6790.6790.6780.6780.6770.6750.6740.6740.67367.18367.07966.9966.97766.966.87566.83766.70566.60266.47466.31466.16366.12166.03365.95765.95465.91965.91332.91232.80632.74832.72832.68632.68332.67532.62732.54232.47332.40832.318NANANA
us-gaap:AdditionalPaidInCapitalCommonStock ████▇▇▇▇▇▆▆▆▆▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▃▃▃▂▂▂▂▂▂▂▁▁338.099336.757335.365332.629325.862325.052321.19318.092315.766308.551305.66303.399303.245235.694233.077233.954233.471231.253229.779229.107226.913225.072221.345220.738217.165215.345213.737212.733211.774209.908208.705240.125238.699236.801235.262233.442232.521231.331227.788222.756221.324217.855215.066NANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▇▆▅▅▄▅▅▄▄▃▄▄▃▁▂▂▁▁▂▂▂▁▂▂▂▁▃▂▂▂▂▂▁▁▂▂▂▂▃▃▂▂1216.8771146.381084.2171056.4451024.881943.5091014.0461015.915993.911963.749908.079983.126953.526930.028788.522817.789825.307808.342797.307861.797848.312827.982804.875866.378838.713809.74786.908886.477860.968832.984811.32849.244818.889796.242778.202866.202847.529829.569834.111915.517895.781854.732834.375NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▄▆▅▅▃▄▄▃▂▁▁▁▂▇▇▇▇▆▇█▇▆▆▇████▇▇▆▆█▇▇▇▆▆▅▆▅▅79.14463.967108.714102.58593.03539.46452.47357.93442.59314.729-14.572-22.344-14.648-6.973157.919153.422144.978134.379122.61157.672164.603145.537123.774122.72138.856163.788171.383161.345173.698153.764136.027125.296127.242160.723143.17155.038133.991128.101117.32589.669104.0101.2495.992NANANA
us-gaap:TreasuryStockValue ▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▇▇▆▆▆▆▆███▇▇▇▇▆▆▆▇▆▆▆▆▅▃▂▁401.25400.925401.291400.702400.599399.969400.979400.787400.529400.314401.353400.764400.935401.055401.639400.665400.641404.264404.495403.394403.466403.584403.646402.341407.041406.945406.768404.686404.625404.564404.561403.481403.329403.161404.105403.174402.911402.178403.444401.744397.718394.751392.849NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▅█▆▇▁▇▇▆▃▅▅▇▂▅▆▅▂▅104.22260.287100.01579.47189.54-5.76790.15581.41574.5630.78753.73363.36984.60715.39351.59271.36363.30511.26551.463NANANANANANANANANANANANANANANANANANANANANA65.92817.938NANA37.907-2.448
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▅▃▁▄▆▃▄▂▄▄▄▂▅▇▃▂▆█-92.072-16.544-53.28-88.041-36.71410.048-49.891-34.208-71.819-28.835-30.936-28.385-70.72-4.16833.115-57.085-63.1465.90448.803NANANANANANANANANANANANANANANANANANANANANA-60.348-14.713NANA-23.49118.385
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▇▄█▇█▄███▄███▂███▁-11.628-11.025-55.107-5.638-10.73-7.783-58.109-7.993-3.088-6.911-52.126-9.617-8.712-6.569-87.313-8.756-6.948-7.294-95.967NANANANANANANANANANANANANANANANANANANANANA-5.58-3.225NANA-14.416-15.937
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▄▇▃▂█▄▂█▄▃▁▆▄▄▄0.52232.718-8.372-14.20842.096-3.502-17.84539.214-0.347-4.959-29.32925.3675.1754.656-2.606NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▅█▆▇▁▇▇▆▃▅▅▇▂▅▆▅▂▅104.22260.287100.01579.47189.54-5.76790.15581.41574.5630.78753.73363.36984.60715.39351.59271.36363.30511.26551.463NANANANANANANANANANANANANANANANANANANANANA65.92817.938NANA37.907-2.448
us-gaap:NetIncomeLoss █▇█▆█▁▆▅▆▇▃▆▅▄▆▄▅▅81.81573.01283.80542.38792.166-61.26753.37832.32440.46765.473-20.6639.37233.25112.21657.2581.73426.20819.828NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▅▃▁▄▆▃▄▂▄▄▄▂▅▇▃▂▆█-92.072-16.544-53.28-88.041-36.71410.048-49.891-34.208-71.819-28.835-30.936-28.385-70.72-4.16833.115-57.085-63.1465.90448.803NANANANANANANANANANANANANANANANANANANANANA-60.348-14.713NANA-23.49118.385
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▆▁▁▄▃▅█▂▃▃2.3010.8870.7991.5561.5031.912.8991.0521.4941.51NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▇▄█▇█▄███▄███▂███▁-11.628-11.025-55.107-5.638-10.73-7.783-58.109-7.993-3.088-6.911-52.126-9.617-8.712-6.569-87.313-8.756-6.948-7.294-95.967NANANANANANANANANANANANANANANANANANANANANA-5.58-3.225NANA-14.416-15.937
us-gaap:PaymentsOfDividendsCommonStock ▁▁▃▁▁▁▃▁▁▁▃▁▁▁▅▁▁▁▅▁▁▁▅▁▁▁▇▁▁▁▄▁▁▁▆▁▁▁▆▁▁▁█▁▁▁11.30610.83855.97510.81210.78710.33255.16310.33610.2959.79754.2859.7729.7539.2986.5259.2529.2438.79396.6778.7788.7478.28695.3568.2438.2127.766137.0667.7457.7417.30571.7837.2927.2556.807113.0976.796.7886.362112.0986.3216.3326.104158.876.0715.9075.954
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value0.6820.6810.6810.680.6790.6790.6780.6780.6770.6750.6740.6740.67367676666666666666666666666666565656532323232323232323232323232
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 Assets0.00.00.00.00.00.00.00.00.00.00.00.00.02.32.32.32.32.42.42.32.32.42.42.32.42.42.42.22.32.42.41.11.21.21.21.21.21.21.21.21.21.31.31.3

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Common
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.6810.6780.67467
Percentage of CommonStockValue100.0100.0100.0100.0
Percentage of Assets0.00.00.02.3
Percentage of Assets srt:ParentCompany0.10.10.16.6

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4545454544454544444444444444444444444443434343212121212121212121212121
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

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value4545454444444444444444444443434343434343434342212121212121212121202121
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

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302020-09-302020-06-302020-03-31
Value169000.0339000.094000.094000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-06-302010-03-31
Value1.811.621.860.942.05-1.361.190.720.911.47-0.460.890.750.281.30.040.60.450.730.510.670.720.780.830.860.710.870.770.830.670.791.761.41.171.181.21.171.321.421.142.251.261.661.14
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-06-302010-03-31
Value1.791.61.840.932.04-1.361.180.710.891.46-0.460.880.740.271.290.040.590.450.720.50.650.710.760.810.840.70.850.760.820.660.771.731.381.151.161.191.151.31.391.122.221.241.651.13
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1300000.0600000.01000000.0900000.01200000.01400000.01000000.01100000.01200000.01300000.01000000.01400000.01000000.01200000.0900000.0900000.01000000.01200000.0900000.01100000.01100000.01100000.0900000.01000000.0900000.01200000.0900000.01000000.01000000.01000000.0800000.0900000.0900000.0900000.0800000.0900000.01000000.01000000.0700000.0800000.0700000.0900000.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

us-gaap:RestrictedStockUnitsRSU


Allocated
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value200000.0100000.0200000.0300000.0200000.0100000.0200000.0100000.0100000.0100000.0200000.0200000.0
Percentage of AllocatedShareBasedCompensationExpense15.416.720.025.014.310.016.77.710.010.016.722.2
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:RestrictedStockUnitsRSU0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName

rli:LongTermIncentivePlan2015


Allocated
Period End2021-06-302021-03-312020-06-302020-03-31
Value1700000.01600000.0700000.01300000.0
Percentage of AllocatedShareBasedCompensationExpense0.00.0116.7130.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:LongTermIncentivePlan20150.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:TitleOfIndividual, us-gaap:AwardType

srt:Director, us-gaap:RestrictedStockUnitsRSU


Allocated
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value100000.0100000.0100000.0100000.0100000.0200000.0100000.0100000.0100000.0
Percentage of AllocatedShareBasedCompensationExpense7.716.710.011.18.314.310.08.37.7
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating srt:Director us-gaap:RestrictedStockUnitsRSU0.00.00.00.00.00.00.00.00.0

Benefits Losses And Expenses

us-gaap:BenefitsLossesAndExpenses

us-gaap:BenefitsLossesAndExpenses


Benefits
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
Value2092032032201882012042011971872051971861761842001681751741771581591611491421551561511461421441351321281421351231251211248810010011094106
Percentage of BenefitsLossesAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
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
Value96288951145-74.29847476894-12.8883125-14.18261103631-2.87515485334191223472055464435-3.5794213463038581147323058
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1028910251114-79.36463384881-32.70846391424-0.862342638314245455154444648524140554335283636414138713850415234
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0.5371.2050.7511.0910.2051.4570.7691.1260.6640.625-2.1590.838-0.899-0.0151.0731.7750.62119.7839.992117.3357.5074.8813105.709106.4973.61104.0874.1769.0486.278
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest0.51.30.72.10.2-1.81.22.91.40.86.61.8-2.3-0.1-124.55.22.330.931.423.625.016.114.58.929.723.211.719.915.58.819.99.411.631.717.2
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2016199.12222-18.0979.846.6238.36116-12.0486.9776.3112.162-32.286-2.5967.8286.6155.8198.8791314111617138.9821516136.9531713113.4781111131012241210131710
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeTaxExpenseBenefit us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0.1130.2530.1580.2290.0430.3060.1620.2360.140.131-0.4530.176-0.189-0.0030.3760.6210.2174.1153.4243.4973.9892.5682.6281.7084.6263.7751.9983.6512.2741.2643.8491.431.4623.1672.198
Percentage of IncomeTaxExpenseBenefit0.61.50.82.50.2-1.71.63.61.70.83.82.5-3.0-0.1-14.57.93.370.738.626.428.121.916.49.833.242.013.021.917.518.221.810.513.191.120.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense Debt

us-gaap:InterestExpenseDebt

us-gaap:InterestExpenseDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1904000.01901000.01902000.01901000.01903000.01897000.02005000.01861000.01861000.01861000.01861000.01862000.01858000.01856000.01857000.01856000.01857000.01856000.01856000.01857000.01856000.01857000.01856000.01857000.01857000.01856000.01856000.01857000.01874000.01851000.03557000.01513000.01513000.01512000.01513000.01512000.01525000.01500000.01513000.01513000.01512000.01512000.01513000.01512000.01513000.01512000.0
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value8173834292-61.26753324065-20.66393312571.7342619
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value0.4240.9520.5930.8620.1621.1510.6070.890.5240.494-1.7060.662-0.71-0.0120.6971.154
Percentage of NetIncomeLoss0.51.30.72.00.2-1.91.12.81.30.88.31.7-2.1-0.140.24.4
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value81734292-61.267324065393312
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value8173834292-61.26753324065-20.66393312571.734261932222931333537303733352833372924252524283026472640273424
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


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
Value8173834292-61.26753324065-20.66393312571.7342619322229313335373037333528333729242525242830264727402734
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Investment Income

us-gaap:NetInvestmentIncome

us-gaap:NetInvestmentIncome


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value16161616161717171616161614141414131313131313131313131314131313131212141414151615151616161616
Percentage of NetInvestmentIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value20182116131418161616111414131811131314131312141213111513131215131112101110121210129.61511108.178.827
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Premiums Earned Net

us-gaap:PremiumsEarnedNet

us-gaap:PremiumsEarnedNet


Premiums
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
Value241228224216208215215211207204204200196190188182184183
Percentage of PremiumsEarnedNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PremiumsEarnedNet us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

rli:Commercial, rli:PropertyInsuranceSegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value252221201919181716161818171615
Percentage of PremiumsEarnedNet10.49.99.49.39.18.98.48.17.88.28.99.29.18.98.6
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:Commercial rli:PropertyInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:CommercialAndPersonalLines, rli:CasualtySegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value53514946424037353432323130292928
Percentage of PremiumsEarnedNet22.222.622.021.420.318.617.617.016.515.815.915.615.615.815.515.8
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:CommercialAndPersonalLines rli:CasualtySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:CommercialSuretyProduct, rli:SuretyInsuranceSegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value111110101010227.2097.0776.734236.8636.7616.7136.861
Percentage of PremiumsEarnedNet4.64.84.74.95.25.110.53.43.43.311.33.43.43.53.8
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:CommercialSuretyProduct rli:SuretyInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:CommercialTransportation, rli:CasualtySegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value21161715112121212020202020191818
Percentage of PremiumsEarnedNet8.97.47.67.05.39.89.810.09.910.010.010.310.510.19.89.9
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:CommercialTransportation rli:CasualtySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:Contract, rli:SuretyInsuranceSegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value7.0556.5356.9977.1586.8276.367.2517.5076.976.6297.3647.4747.0126.3467.2127.13
Percentage of PremiumsEarnedNet2.92.93.13.33.33.03.43.63.43.23.63.73.63.33.83.9
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:Contract rli:SuretyInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:ExecutiveProducts, rli:CasualtySegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5.0835.2415.8166.3876.9757.3317.6127.0266.3816.0695.7785.3525.1445.0524.7974.439
Percentage of PremiumsEarnedNet2.12.32.62.93.33.43.53.33.13.02.82.72.62.72.52.4
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:ExecutiveProducts rli:CasualtySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:Marine, rli:PropertyInsuranceSegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value24222119201920191817141614131313
Percentage of PremiumsEarnedNet10.110.09.79.19.99.19.49.09.08.37.38.07.67.37.47.2
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:Marine rli:PropertyInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:Miscellaneous, rli:SuretyInsuranceSegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value10101010101010101111111111111111
Percentage of PremiumsEarnedNet4.54.74.84.95.04.95.05.25.45.75.85.96.06.16.26.5
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:Miscellaneous rli:SuretyInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:OtherCasualty, rli:CasualtySegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1515151414141516191716151711108.749
Percentage of PremiumsEarnedNet6.66.76.96.97.26.77.07.99.28.68.07.58.76.05.64.8
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:OtherCasualty rli:CasualtySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:OtherPropertyInsurance, rli:PropertyInsuranceSegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1.1450.9380.8280.7310.6910.6160.520.3970.3260.2660.3250.2690.2640.2323.4220.065
Percentage of PremiumsEarnedNet0.50.40.40.30.30.30.20.20.20.10.20.10.10.11.80.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:OtherPropertyInsurance rli:PropertyInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:PAndCPackageBusiness, rli:CasualtySegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value16151516151515131313121212121312
Percentage of PremiumsEarnedNet6.86.97.17.47.67.37.16.66.46.46.36.46.66.87.06.8
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:PAndCPackageBusiness rli:CasualtySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:ProfessionalServices, rli:CasualtySegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value21212121212020201920201919191919
Percentage of PremiumsEarnedNet9.19.59.79.910.29.69.79.99.39.910.09.910.110.410.510.8
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:ProfessionalServices rli:CasualtySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:SpecialtyPersonal, rli:PropertyInsuranceSegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5.2645.0344.8664.7944.9365.04.9924.9484.7924.5844.4024.2284.1294.1424.4234.844
Percentage of PremiumsEarnedNet2.22.22.22.22.42.32.32.32.32.22.22.12.12.22.32.7
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:SpecialtyPersonal rli:PropertyInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GeneralLiability, rli:CasualtySegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value22222222222324252523242223232322
Percentage of PremiumsEarnedNet9.29.89.910.510.911.111.411.812.211.712.211.211.912.212.612.2
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:GeneralLiability rli:CasualtySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PremiumsEarnedNet us-gaap:StatementBusinessSegments

rli:CasualtySegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value156148147143135143142140138136136131129125123118
Percentage of PremiumsEarnedNet64.865.165.866.064.866.566.266.566.766.966.965.566.066.265.865.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:CasualtySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:PropertyInsuranceSegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value55514845454443413938373937353433
Percentage of PremiumsEarnedNet23.222.621.620.921.720.620.319.619.318.918.519.518.918.518.318.4
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:PropertyInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

rli:SuretyInsuranceSegment


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value28282828282729292929293029282930
Percentage of PremiumsEarnedNet12.012.312.613.013.512.913.513.914.114.214.615.015.115.315.816.5
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating rli:SuretyInsuranceSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value298287304262298118264236238263172240219185207196196196212206195201207200190195203197193181185188171160171169155163163162156136151149142139
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value42803972393837923619337835453505337532363105307330072894294729562881277727772913289227592736282928152780277529332908279127402886267526202644275426892678269527942730252225142538
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 End2020-12-312019-12-312018-12-312017-12-31
Value130811639731018
Percentage of Assets33.232.831.434.6
Percentage of Assets33.232.831.434.6
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

us-gaap:Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Assetsus-gaap:
Period End2020-12-312019-12-31
Value837718
Percentage of Assets21.320.3
Percentage of Assets21.320.3
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value30382817280226932567246225502505241523422298220121582061209320772003192919541991197818871913194619471918193019991989192119112032185117861848185918351850187619261865170317231706
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 Assets71.070.971.271.070.972.971.971.571.672.474.071.671.771.271.070.369.569.570.368.368.468.469.968.869.269.069.668.268.468.869.770.469.268.269.967.568.369.169.669.068.367.568.567.2

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value172167167164
Percentage of Liabilities6.16.67.37.9
Percentage of Assets4.44.75.45.6
Percentage of Assets srt:ParentCompany13.214.417.216.2

us-gaap:Liabilities us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Liabilitiesus-gaap:
Period End2020-12-312019-12-31
Value473420
Percentage of Liabilities16.916.5
Percentage of Assets12.011.9
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees56.558.6

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value42803972393837923619337835453505337532363105307330072894294729562881277727772913289227592736282928152780277529332908279127402886267526202644275426892678269527942730252225142538
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 End2020-12-312019-12-312018-12-312017-12-31
Value130811639731018
Percentage of LiabilitiesAndStockholdersEquity33.232.831.434.6
Percentage of Assets33.232.831.434.6
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value12411154113510991051915995999959894806871849832853879877847823922913872823883867861845933919869828854824833796894853828818867791832708
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.029.128.829.029.127.128.128.528.427.626.028.428.328.829.029.730.530.529.731.731.631.630.131.230.831.030.431.831.631.230.329.630.831.830.132.531.730.930.431.031.532.80.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value1135995806853
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets28.828.126.029.0
Percentage of Assets srt:ParentCompany86.885.682.883.8

us-gaap:StockholdersEquity us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Stockholders
Period End2020-12-312019-12-31
Value364297
Percentage of StockholdersEquity32.029.9
Percentage of Assets9.28.4
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees43.541.4

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value7963108102933952574214-14.572-22.344-14.648-6.973157122123171136143117957715
Percentage of StockholdersEquity6.45.59.69.38.84.35.35.84.41.6-1.8-2.6-1.7-0.818.514.915.020.316.418.014.312.19.32.1
Percentage of Assets1.81.62.82.72.61.21.51.71.30.5-0.5-0.7-0.5-0.25.44.44.56.25.05.44.43.83.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value338336335332325325321318315308305303303235233229221213208235227215207196
Percentage of StockholdersEquity27.229.229.530.331.035.532.331.832.934.537.934.835.728.327.327.926.925.325.229.527.827.224.927.8
Percentage of Assets7.98.58.58.89.09.69.19.19.49.59.89.910.18.17.98.38.17.77.68.98.58.68.20.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value0.6820.6810.6810.680.6790.6790.6780.6780.6770.6750.6740.6740.6736767666666653232323232
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.18.17.98.18.17.88.04.14.04.13.94.5
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.02.32.32.42.42.42.41.21.21.31.30.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DeferredCompensationShareBasedPayments


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value8.2517.9268.2927.7037.66.977.987.7887.537.3158.3547.7657.9368.0568.641110131111106.4747.9898.312
Percentage of StockholdersEquity0.70.70.70.70.70.80.80.80.80.81.00.90.91.01.01.41.31.61.41.41.30.81.01.2
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.30.30.30.30.30.40.40.50.40.40.40.30.30.0
Percentage of Assets us-gaap:DeferredCompensationShareBasedPayments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value1216114610841056102494310141015993963908983953930788797804786811778834834877807
Percentage of StockholdersEquity98.099.395.496.197.5103.0101.9101.6103.5107.7112.5112.8112.2111.792.496.897.793.197.997.7101.9105.4105.5114.0
Percentage of Assets28.428.927.527.928.327.928.629.029.429.829.232.031.732.126.828.729.428.429.629.430.933.234.60.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-401.25-400.925-401.291-400.702-400.599-399.969-400.979-400.787-400.529-400.314-401.353-400.764-400.935-401.055-401.639-404.495-403.646-406.768-404.561-404.105-403.444-392.849-370.506-351.578
Percentage of StockholdersEquity-32.3-34.7-35.3-36.4-38.1-43.7-40.3-40.1-41.7-44.7-49.7-46.0-47.2-48.1-47.1-49.1-49.0-48.1-48.8-50.7-49.3-49.6-44.5-49.6
Percentage of Assets-9.4-10.1-10.2-10.6-11.1-11.8-11.3-11.4-11.9-12.4-12.9-13.0-13.3-13.9-13.6-14.6-14.8-14.7-14.8-15.3-15.0-15.6-14.60.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-06-302010-03-312009-12-31
Value9594627084424664242530593428242621281813291411282731307727203987122244313270810.00.00.00.00.00.00.0
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0
Percentage of Assets2.22.41.61.92.31.31.31.80.70.81.01.91.11.00.80.90.71.00.70.51.00.50.41.01.01.11.12.60.90.71.43.00.50.91.71.11.22.63.00.00.00.00.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.3810.353.2140.204
Percentage of CashAndCashEquivalentsAtCarryingValue0.60.810.70.8
Percentage of Assets0.00.00.10.0
Percentage of Assets srt:ParentCompany0.00.00.30.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312015-12-31
Value959462708442466424253059342824261811
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.22.41.61.92.31.31.31.80.70.81.01.91.11.00.80.90.70.4

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value0.3810.353.2140.2040.0210.178
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents0.60.810.70.80.11.6
Percentage of Assets0.00.00.10.00.00.0
Percentage of Assets srt:ParentCompany0.00.00.30.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value7170686765646260585654525149474544434143413938344145453835
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.81.71.81.81.91.81.71.71.71.71.71.71.71.61.61.61.61.51.51.41.41.41.21.51.71.71.51.4

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment us-gaap:ConsolidatedEntities

srt:ParentCompany


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.6291.5621.4941.426
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment2.42.52.83.0
Percentage of Assets0.00.00.00.0
Percentage of Assets srt:ParentCompany0.10.10.20.1

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302012-09-302012-06-30
Value0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0100000.0200000.0200000.0200000.0200000.0200000.0200000.0200000.0200000.0200000.0200000.0200000.0200000.0
Percentage of AmortizationOfIntangibleAssets0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:Range

srt:Maximum


Amortization
Period End2021-06-30
Value100000.0
Percentage of AmortizationOfIntangibleAssets0.0
Percentage of Assets0.0
Percentage of Assets srt:Maximum0.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5050515252525352535454555656555556565453524947454342424242424036343127252019201919181819
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 Assets1.21.31.31.41.41.61.51.51.61.71.81.81.91.91.91.92.02.02.01.81.81.81.71.61.51.51.51.41.51.51.51.21.31.21.10.90.80.70.70.70.70.70.70.8

us-gaap:PropertyPlantAndEquipmentNet us-gaap:ConsolidatedEntities

srt:ParentCompany


Property
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.7791.8461.9141.982
Percentage of PropertyPlantAndEquipmentNet3.53.53.53.5
Percentage of Assets0.00.10.10.1
Percentage of Assets srt:ParentCompany0.10.20.20.2

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312011-06-302011-03-312010-12-312009-12-31
Value46464646464646464646464646464949495151515158585856262626
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.21.21.21.31.41.31.31.41.41.51.51.51.61.71.71.71.81.81.81.82.12.12.12.11.01.01.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill


Indefinite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-03-312015-12-312014-12-31
Value7500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.07500000.08009000.0
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.20.20.20.30.30.30.30.30.30.30.30.3

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value7.527.5557.6577.7597.8617.9638.0658.1668.2688.378.4728.5648.6318.7319.6459.771012131313131214
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.20.20.20.20.20.20.20.30.30.30.30.30.30.30.40.50.50.50.50.50.50.5

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value20000.055000.0157000.0259000.0361000.0463000.0565000.0666000.0768000.0870000.0972000.01064000.01131000.01231000.02145000.02270000.03425000.05395000.05601000.05808000.06015000.06236000.05298000.06190000.0
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.20.20.20.20.20.20.2

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value53535353535454545454545454545959606464646472717272727274747474757575765960
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.31.41.41.51.61.51.51.61.71.81.81.81.92.02.02.12.32.32.22.22.62.62.52.62.62.62.52.62.72.72.62.82.92.92.22.2

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value121416171819222324
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.40.40.50.50.60.60.70.7

Equity Securities Fv Ni

us-gaap:EquitySecuritiesFvNi

us-gaap:EquitySecuritiesFvNi


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value566555524455422356460428421388340394400
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.214.013.312.011.710.513.012.212.512.011.012.813.6

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value566555523455422356460428421387339393400
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.099.999.999.999.9100.0
Percentage of Assets13.214.013.312.011.710.513.012.212.512.010.912.813.6
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312019-06-302019-03-312018-12-312018-09-30
Value0.1020.1040.0830.5030.5030.4980.493
Percentage of EquitySecuritiesFvNi0.00.00.00.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.0

us-gaap:EquitySecuritiesFvNi us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value566555524455422356460428421388340394400
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.214.013.312.011.710.513.012.212.512.011.012.813.6
Percentage of Assets us-gaap:FairValueMeasurementsRecurring0.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3333314438393641435118141511141518121023141316149.664111212119.2548.2641810108.34513101518168.2719.5861018
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.80.80.81.21.11.21.01.21.31.60.60.50.50.40.50.50.60.50.40.80.50.50.60.50.30.40.50.40.40.30.30.70.40.40.30.50.40.60.70.60.30.40.40.7

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value8274806657265655503924383640538479726485867663606882
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.92.01.71.60.81.61.61.51.20.81.21.21.41.82.92.82.62.32.93.02.82.32.12.43.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value4259000.04424000.05915000.05904000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.10.10.20.2

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value2389000.02334000.04424000.04424000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.10.10.10.1

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value820000.0802000.02334000.02334000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.00.00.10.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value242000.0242000.0802000.0802000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value323000.0321000.0563000.0564000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value15171920212324252629
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.50.50.60.70.70.70.80.9

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value15182021
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets0.40.50.50.6

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value737000.0854000.0958000.01071000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value12411154113510991051915995999959894806871849832853879877847823922913872823883867861845933919869828854824833796894853828818867791832708
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.029.128.829.029.127.128.128.528.427.626.028.428.328.829.029.730.530.529.731.731.631.630.131.230.831.030.431.831.631.230.329.630.831.830.132.531.730.930.431.031.532.80.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value1135995806853
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets28.828.126.029.0
Percentage of Assets srt:ParentCompany86.885.682.883.8

us-gaap:StockholdersEquity us-gaap:EquityMethodInvestmentNonconsolidatedInvestee

us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees


Stockholders
Period End2020-12-312019-12-31
Value364297
Percentage of StockholdersEquity32.029.9
Percentage of Assets9.28.4
Percentage of Assets us-gaap:EquityMethodInvestmentNonconsolidatedInvesteeOrGroupOfInvestees43.541.4

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value7963108102933952574214-14.572-22.344-14.648-6.973157122123171136143117957715
Percentage of StockholdersEquity6.45.59.69.38.84.35.35.84.41.6-1.8-2.6-1.7-0.818.514.915.020.316.418.014.312.19.32.1
Percentage of Assets1.81.62.82.72.61.21.51.71.30.5-0.5-0.7-0.5-0.25.44.44.56.25.05.44.43.83.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value338336335332325325321318315308305303303235233229221213208235227215207196
Percentage of StockholdersEquity27.229.229.530.331.035.532.331.832.934.537.934.835.728.327.327.926.925.325.229.527.827.224.927.8
Percentage of Assets7.98.58.58.89.09.69.19.19.49.59.89.910.18.17.98.38.17.77.68.98.58.68.20.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value0.6820.6810.6810.680.6790.6790.6780.6780.6770.6750.6740.6740.6736767666666653232323232
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.18.17.98.18.17.88.04.14.04.13.94.5
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.02.32.32.42.42.42.41.21.21.31.30.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DeferredCompensationShareBasedPayments


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value8.2517.9268.2927.7037.66.977.987.7887.537.3158.3547.7657.9368.0568.641110131111106.4747.9898.312
Percentage of StockholdersEquity0.70.70.70.70.70.80.80.80.80.81.00.90.91.01.01.41.31.61.41.41.30.81.01.2
Percentage of Assets0.20.20.20.20.20.20.20.20.20.20.30.30.30.30.30.40.40.50.40.40.40.30.30.0
Percentage of Assets us-gaap:DeferredCompensationShareBasedPayments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value1216114610841056102494310141015993963908983953930788797804786811778834834877807
Percentage of StockholdersEquity98.099.395.496.197.5103.0101.9101.6103.5107.7112.5112.8112.2111.792.496.897.793.197.997.7101.9105.4105.5114.0
Percentage of Assets28.428.927.527.928.327.928.629.029.429.829.232.031.732.126.828.729.428.429.629.430.933.234.60.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value-401.25-400.925-401.291-400.702-400.599-399.969-400.979-400.787-400.529-400.314-401.353-400.764-400.935-401.055-401.639-404.495-403.646-406.768-404.561-404.105-403.444-392.849-370.506-351.578
Percentage of StockholdersEquity-32.3-34.7-35.3-36.4-38.1-43.7-40.3-40.1-41.7-44.7-49.7-46.0-47.2-48.1-47.1-49.1-49.0-48.1-48.8-50.7-49.3-49.6-44.5-49.6
Percentage of Assets-9.4-10.1-10.2-10.6-11.1-11.8-11.3-11.4-11.9-12.4-12.9-13.0-13.3-13.9-13.6-14.6-14.8-14.7-14.8-15.3-15.0-15.6-14.60.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value0.6820.6810.6810.680.6790.6790.6780.6780.6770.6750.6740.6740.67367676666666666666666666666666565656532323232323232323232323232
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 Assets0.00.00.00.00.00.00.00.00.00.00.00.00.02.32.32.32.32.42.42.32.32.42.42.32.42.42.42.22.32.42.41.11.21.21.21.21.21.21.21.21.21.31.31.3

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Common
Period End2020-12-312019-12-312018-12-312017-12-31
Value0.6810.6780.67467
Percentage of CommonStockValue100.0100.0100.0100.0
Percentage of Assets0.00.00.02.3
Percentage of Assets srt:ParentCompany0.10.10.16.6

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value338336335332325325321318315308305303303235233233233231229229226225221220217215213212211209208240238236235233232231227222221217215207
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.98.58.58.89.09.69.19.19.49.59.89.910.18.17.97.98.18.38.37.97.88.28.17.87.77.77.77.37.37.57.68.38.99.08.98.58.68.68.58.08.18.68.68.2

us-gaap:AdditionalPaidInCapitalCommonStock us-gaap:ConsolidatedEntities

srt:ParentCompany


Additional
Period End2020-12-312019-12-312018-12-312017-12-31
Value335321305233
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0
Percentage of Assets8.59.19.87.9
Percentage of Assets srt:ParentCompany25.627.631.422.9

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1216114610841056102494310141015993963908983953930788817825808797861848827804866838809786886860832811849818796778866847829834915895854834877
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets28.428.927.527.928.327.928.629.029.429.829.232.031.732.126.827.728.629.128.729.629.330.029.430.629.829.128.430.229.629.829.629.430.630.429.431.531.531.030.932.832.833.933.234.6

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:ConsolidatedEntities

srt:ParentCompany


Retained
Period End2020-12-312019-12-312018-12-312017-12-31
Value10841014908788
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0
Percentage of Assets27.528.629.226.8
Percentage of Assets srt:ParentCompany82.987.293.277.4

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value7963108102933952574214-14.572-22.344-14.648-6.973157153144134122157164145123122138163171161173153136125127160143155133128117891041019577
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.62.82.72.61.21.51.71.30.5-0.5-0.7-0.5-0.25.45.25.04.84.45.45.75.34.54.34.95.96.25.56.05.55.04.34.86.15.45.65.04.84.43.23.84.03.83.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities

srt:ParentCompany


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value10852-14.572157
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0
Percentage of Assets2.81.5-0.55.4
Percentage of Assets srt:ParentCompany8.34.5-1.515.5

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents

srt:CumulativeEffectPeriodOfAdoptionAdjustedBalance, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Accumulated
Period End2021-03-312020-12-312020-06-302020-03-312019-12-312019-06-302018-12-312017-12-31
Value6310893395242-14.57215
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.09.9
Percentage of Assets1.62.82.61.21.51.3-0.50.5
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustedBalance us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value7963108102933952574214-14.572-22.344-14.648-6.97315715314413412215716414512312213816317116117315313612512716014315513312811795
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.62.82.72.61.21.51.71.30.5-0.5-0.7-0.5-0.25.45.25.04.84.45.45.75.34.54.34.95.96.25.56.05.55.04.34.86.15.45.65.04.84.43.8
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value401400401400400399400400400400401400400401401400400404404403403403403402407406406404404404404403403403404403402402403401397394392370
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.410.110.210.611.111.811.311.411.912.412.913.013.313.913.613.613.914.614.613.814.014.614.814.214.514.614.713.813.914.514.814.015.115.415.314.615.015.015.014.414.615.615.614.6

us-gaap:TreasuryStockValue us-gaap:ConsolidatedEntities

srt:ParentCompany


Treasury
Period End2020-12-312019-12-312018-12-312017-12-31
Value401400401401
Percentage of TreasuryStockValue100.0100.0100.0100.0
Percentage of Assets10.211.312.913.6
Percentage of Assets srt:ParentCompany30.734.541.239.4

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312011-06-302011-03-312010-06-302010-03-31
Value104601007989-5.76790817430536384155171631151651737-2.448
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312011-06-302011-03-312010-06-302010-03-31
Value-92.072-16.544-53.28-88.041-36.71410-49.891-34.208-71.819-28.835-30.936-28.385-70.72-4.16833-57.085-63.1465.90448-60.348-14.713-23.49118
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312011-06-302011-03-312010-06-302010-03-31
Value-11628000.0-11025000.0-55107000.0-5638000.0-10730000.0-7783000.0-58109000.0-7993000.0-3088000.0-6911000.0-52126000.0-9617000.0-8712000.0-6569000.0-87313000.0-8756000.0-6948000.0-7294000.0-95967000.0-5580000.0-3225000.0-14416000.0-15937000.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.52232-8.372-14.20842-3.502-17.84539-0.347-4.959-29.329255.1754.656-2.606
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312011-06-302011-03-312010-06-302010-03-31
Value104601007989-5.76790817430536384155171631151651737-2.448
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value8173834292-61.26753324065-20.66393312571.7342619
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value0.4240.9520.5930.8620.1621.1510.6070.890.5240.494-1.7060.662-0.71-0.0120.6971.154
Percentage of NetIncomeLoss0.51.30.72.00.2-1.91.12.81.30.88.31.7-2.1-0.140.24.4
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value81734292-61.267324065393312
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312011-06-302011-03-312010-06-302010-03-31
Value-92.072-16.544-53.28-88.041-36.71410-49.891-34.208-71.819-28.835-30.936-28.385-70.72-4.16833-57.085-63.1465.90448-60.348-14.713-23.49118
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.3010.8870.7991.5561.5031.912.8991.0521.4941.51
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312011-06-302011-03-312010-06-302010-03-31
Value-11628000.0-11025000.0-55107000.0-5638000.0-10730000.0-7783000.0-58109000.0-7993000.0-3088000.0-6911000.0-52126000.0-9617000.0-8712000.0-6569000.0-87313000.0-8756000.0-6948000.0-7294000.0-95967000.0-5580000.0-3225000.0-14416000.0-15937000.0
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1110551010105510109.797549.7729.7539.29869.2529.2438.793968.7788.7478.286958.2438.2127.7661377.7457.7417.305717.2927.2556.8071136.796.7886.3621126.3216.3326.1041586.0715.9075.954
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value19.818.71.517.70.1980.228-0.0070.170.1710.199-0.1040.1510.160.15-0.4413.0120.230.25-0.0370.2850.3130.311-0.0130.3090.320.313-0.030.3160.31
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value76.6272.5770.6768.6763.8663.5862.5261.5260.5955.054.2453.8151.6648.2246.844.8244.3241.2240.940.3238.5333.7832.4232.3130.5627.626.6528.7728.5326.3326.0453.1850.045.1244.4548.2647.8244.1143.2347.1445.5743.2541.3247.8747.2444.7343.35
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value805624536463798277816857545168556350435133
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value5049424053555557606456
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:CashFlowFromStockOptionExercises

rli:CashFlowFromStockOptionExercises


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-0.322-0.1870.8685.1740.0572.549-2.9462.3437.2072.8862.1590.1551.0412.721-0.7888.084-2.295-1.4991.0980.450.673-1.48
Percentage of CashFlowFromStockOptionExercises100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:ComprehensiveEarningsPerShareBasic

rli:ComprehensiveEarningsPerShareBasic


Comprehensive
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.153.24-1.651.061.061.532.13-0.290.710.58-0.321.40.230.840.72-0.070.351.11.220.810.460.280.531.10.491.291.09-0.71.67-0.171.990.622.191.441.832.770.562.381.511.482.791.11.58
Percentage of ComprehensiveEarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:ComprehensiveEarningsPerShareDiluted

rli:ComprehensiveEarningsPerShareDiluted


Comprehensive
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.143.22-1.651.061.051.512.11-0.290.70.57-0.321.380.230.830.71-0.070.341.081.20.790.450.280.521.080.481.271.07-0.71.64-0.171.960.62.161.421.82.70.552.351.491.452.771.091.57
Percentage of ComprehensiveEarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsNetInvestmentIncome us-gaap:FairValueByAssetClass

rli:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsNetInvestmentIncome

us-gaap:FixedIncomeSecurities


Fair
Period End2021-06-302021-03-312020-12-31
Value-13000.0-13000.0-5000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsNetInvestmentIncome100.0100.0100.0

rli:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsNetRealizedGains us-gaap:FairValueByAssetClass

rli:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsNetRealizedGains

us-gaap:FixedIncomeSecurities


Fair
Period End2021-06-302021-03-312020-12-31
Value93000.0-192000.019000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsNetRealizedGains100.0100.0100.0

rli:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetNetRealizedAndUnrealizedGainsLosses us-gaap:FairValueByAssetClass

rli:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetNetRealizedAndUnrealizedGainsLosses

us-gaap:FixedIncomeSecurities


Fair
Period End2021-06-302021-03-312020-12-31
Value616000.0-811000.0656000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetNetRealizedAndUnrealizedGainsLosses100.0100.0100.0

rli:GeneralCorporateExpenseAndInterestOnDebt

rli:GeneralCorporateExpenseAndInterestOnDebt


General
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value5.595.2434.5693.8973.6524.444
Percentage of GeneralCorporateExpenseAndInterestOnDebt100.0100.0100.0100.0100.0100.0

rli:GeneralCorporateExpenses

rli:GeneralCorporateExpenses


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3.6863.3423.8482.6681.9941.7553.5442.583
Percentage of GeneralCorporateExpenses100.0100.0100.0100.0100.0100.0100.0100.0

rli:NetRealizedGainsLosses

rli:NetRealizedGainsLosses


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value36143.331.512-2.109150.4773.211
Percentage of NetRealizedGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0

rli:NetRealizedGainsLosses us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.3661.1830.5160.7380.3122.3060.7691.126
Percentage of NetRealizedGainsLosses1.08.415.548.8-14.815.2161.235.1

rli:OtherNonCashReductionsToRightOfUseAssets

rli:OtherNonCashReductionsToRightOfUseAssets


Other
Period End2020-12-312020-09-302020-06-302020-03-31
Value0001192000.0
Percentage of OtherNonCashReductionsToRightOfUseAssets0.00.00.0100.0

rli:PaymentsForOtherInvestingActivities

rli:PaymentsForOtherInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.3154.323-2.2448.4444.042.611105.0322.9884.134
Percentage of PaymentsForOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:PolicyAcquisitionCostAmortizationExpenseAndDirectPeriodCosts

rli:PolicyAcquisitionCostAmortizationExpenseAndDirectPeriodCosts


Policy
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
Value777473716972747171716668666666626063656160626260595860585555545451505049484842494638
Percentage of PolicyAcquisitionCostAmortizationExpenseAndDirectPeriodCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:ProceedsFromOtherInvestingActivities

rli:ProceedsFromOtherInvestingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value589000.0521000.01192000.0540000.0329000.02267000.02419000.028000.046000.09000.03305000.027000.027000.035000.01655000.0500000.0
Percentage of ProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:ReductionToRightOfUseAssetResultingFromReductionToLeaseLiability

rli:ReductionToRightOfUseAssetResultingFromReductionToLeaseLiability


Reduction
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1191000.059000.0018000.00
Percentage of ReductionToRightOfUseAssetResultingFromReductionToLeaseLiability100.0100.00.0100.00.0

rli:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedInPeriod

rli:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedInPeriod


Share
Period End2021-06-302021-03-31
Value110000.0102000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedInPeriod100.0100.0

rli:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedWeightedAverageGrantDateFairValue

rli:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedWeightedAverageGrantDateFairValue


Share
Period End2021-06-302021-03-31
Value-5.56112.16
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsReinvestedWeightedAverageGrantDateFairValue100.0100.0

rli:TaxExpenseBenefitOnInvestments us-gaap:InvestmentType

rli:TaxExpenseBenefitOnInvestments

rli:InvestmentInLowIncomeHousingTaxCreditPartnershipNetOfAmortization


Tax
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
Value-900000.0-900000.0-6100000.0900000.0900000.0900000.0600000.0600000.0600000.0600000.0500000.0600000.0600000.0600000.0500000.0600000.0600000.0600000.0
Percentage of TaxExpenseBenefitOnInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:TransfersBetweenDeferredCompensationPlanAndTreasuryStock us-gaap:StatementEquityComponents

rli:TransfersBetweenDeferredCompensationPlanAndTreasuryStock

us-gaap:DeferredCompensationShareBasedPayments


Transfers
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value325000.0-366000.0103000.0630000.0-1010000.0258000.0215000.0-1039000.0
Percentage of TransfersBetweenDeferredCompensationPlanAndTreasuryStock100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStock


Transfers
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-325000.0366000.0-103000.0-630000.01010000.0-258000.0-215000.01039000.0
Percentage of TransfersBetweenDeferredCompensationPlanAndTreasuryStock-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

rli:UnrealizedGainLossOnEquitySecuritiesStillHeld us-gaap:InvestmentType

rli:UnrealizedGainLossOnEquitySecuritiesStillHeld

us-gaap:EquitySecurities


Unrealized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3941622872-115.2316.91241
Percentage of UnrealizedGainLossOnEquitySecuritiesStillHeld100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded


Debt
Period End2020-12-312020-09-302020-06-302020-03-31
Value-411000.017000.0110000.0624000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease


Debt
Period End2020-09-302020-06-302020-03-31
Value-178000.0100000.0800000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-171000.0-22000.0-235000.0-353000.0107000.0849000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease0.00.00.0198.3107.0106.1

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold


Debt
Period End2020-09-302020-06-30
Value6000.0110000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossSellBeforeRecovery

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLossSellBeforeRecovery


Debt
Period End2020-09-30
Value186000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLossSellBeforeRecovery100.0

us-gaap:DebtSecuritiesAvailableForSaleChangeInPresentValueExpenseReversal

us-gaap:DebtSecuritiesAvailableForSaleChangeInPresentValueExpenseReversal


Debt
Period End2021-06-302021-03-312020-06-302020-03-31
Value-171000.0-22000.0107000.0226000.0
Percentage of DebtSecuritiesAvailableForSaleChangeInPresentValueExpenseReversal100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss us-gaap:InvestmentType

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DebtSecurities


Debt
Period End2020-12-31
Value0
Percentage of DebtSecuritiesAvailableForSaleRealizedGainLoss0.0

us-gaap:DividendsCommonStock

us-gaap:DividendsCommonStock


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value111010101010109.8039.7729.7539.29
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value111010101010109.8039.7729.7539.29
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsDividends

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsDividends


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value0.20.3-0.30.40.002-0.00300.0060.0040.0020.0060.0030.0040.014-0.001-0.6420.0120.0200.020.0110.0120.0010.0120.010.0130.013
Percentage of EffectiveIncomeTaxRateReconciliationDeductionsDividends100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends

us-gaap:EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.10.10.10.30.001-0.0020.0030.0030.0030.0020.0140.0030.0040.010.022-0.2790.0070.0090.0150.0080.0060.0050.0120.0040.0040.0050.0190.0040.01
Percentage of EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpense

us-gaap:EffectiveIncomeTaxRateReconciliationNondeductibleExpense


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value0.80.50.30.50.1-0.300.6
Percentage of EffectiveIncomeTaxRateReconciliationNondeductibleExpense100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-30
Value-0.31.0-0.5-0.3-0.005-0.001-0.008-0.0080.0190.006-0.0140.004-0.0060.083-0.013-0.189-0.0150.009-0.0010.005-0.004-0.0020.0010.004-0.003-0.003-0.004
Percentage of EffectiveIncomeTaxRateReconciliationOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-270000.0-1924000.0-1396000.0-848000.0-265000.0-1029000.0-412000.0-614000.0-2191000.0-741000.0-193000.0-2273000.0-924000.0-1143000.0-2087000.0-477000.0
Percentage of EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-0.3-2.10.6-1.6-0.0020.0130.004-0.016-0.045-0.009-0.024-0.049-0.023-0.079-0.0070.553
Percentage of EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment

us-gaap:EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-30
Value0.80.9-0.70.60.1-1.70
Percentage of EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment100.0100.0100.0100.0100.0100.00.0

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value0.30.4-0.40.60.003-0.004-0.0010.0070.0060.0040.0120.0080.0130.04-0.004-1.3770.0340.0450.0010.0320.0240.0240.0010.0210.020.0220.0210.02
Percentage of EffectiveIncomeTaxRateReconciliationTaxExemptIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense


Employee
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value300000.0100000.0200000.0200000.0200000.0300000.0200000.0200000.0200000.0300000.0200000.0400000.0300000.0400000.0300000.0300000.0400000.0400000.0300000.0300000.0400000.0400000.0300000.0400000.0300000.0400000.0300000.0300000.0300000.0300000.0300000.0400000.0300000.0300000.0300000.0300000.0300000.0300000.0200000.0300000.0200000.0300000.0
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense us-gaap:PlanName

rli:LongTermIncentivePlan2015


Employee
Period End2021-06-302021-03-312020-06-302020-03-31
Value300000.0300000.0100000.0200000.0
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense0.00.0100.0100.0

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss

us-gaap:EquitySecuritiesFvNiUnrealizedGainLoss


Equity
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
Value3.95628592874-130.395304.9068.8133-64.24.848-12.611-26.772
Percentage of EquitySecuritiesFvNiUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss us-gaap:FairValueByAssetClass, us-gaap:IncomeStatementLocation

us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

us-gaap:FixedIncomeSecurities, rli:NetRealizedGainsLosses


Fair
Period End2021-06-302021-03-312020-12-31
Value93000.0-192000.019000.0
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss100.0100.0100.0

us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss us-gaap:FairValueByAssetClass, us-gaap:OtherComprehensiveIncomeLocation

us-gaap:FixedIncomeSecurities, us-gaap:OtherComprehensiveIncome


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value536000.0-606000.0642000.0206000.0766000.0-1048000.0
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss576.3315.63378.90.00.00.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss

us-gaap:FixedIncomeSecurities


Fair
Period End2021-06-302021-03-312020-12-31
Value536000.0-606000.0642000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

us-gaap:FixedIncomeSecurities


Fair
Period End2021-06-302021-03-312020-12-31
Value4.185.4655.217
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery us-gaap:Range

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery

srt:Maximum


Financing
Period End2021-06-302021-03-31
Value0100000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.0100.0

us-gaap:GainOnSaleOfInvestments rli:TypeOfTransaction, us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:InvestmentType

us-gaap:GainOnSaleOfInvestments

rli:CallsAndMaturitiesOfMarketableSecurities, us-gaap:AvailableforsaleSecurities, us-gaap:DebtSecurities


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.1510.2550.2960.2310.1490.1450.871
Percentage of GainOnSaleOfInvestments100.0100.0100.0100.0100.0100.0100.0

rli:SalesOfMarketableSecurities, us-gaap:AvailableforsaleSecurities, us-gaap:DebtSecurities


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.2491.0030.4951.4641.2252.270.679
Percentage of GainOnSaleOfInvestments164.9393.3167.2633.8822.11565.578.0

us-gaap:GainOnSaleOfInvestments rli:TypeOfTransaction, us-gaap:InvestmentType

rli:SalesOfMarketableSecurities, us-gaap:EquitySecurities


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value36143.1662.6031.777171.3632.5593.9829.034
Percentage of GainOnSaleOfInvestments24121.25581.61069.61126.81192.612270.3156.50.00.00.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value136.4241.8748.7455.14.5143.1674.0118.4685.3140.2033.5877.15.1661.823.666.8064.9380.011.8815.1913.751-0.1270.6616.1864.1940.1342.9155.8643.4250.2192.5644.6333.499-0.0751.8594.1232.946-0.7180.7133.8862.616-0.2261.6483.4262.253
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends

us-gaap:IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value137000.0130000.0680000.0134000.0137000.0132000.0709000.0136000.0140000.0137000.0761000.0139000.0145000.0139000.02181000.0240000.0251000.0233000.02588000.0238000.0243000.0232000.02684000.0234000.0238000.0220000.03834000.0218000.0220000.0
Percentage of IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationDeductionsDividends

us-gaap:IncomeTaxReconciliationDeductionsDividends


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value248000.0236000.0178000.0221000.0212000.0271000.0188000.0218000.0214000.0203000.0259000.0150000.0169000.0196000.0537000.0553000.0405000.0530000.0540000.0626000.0484000.0565000.0563000.0603000.0535000.0577000.0626000.0633000.0
Percentage of IncomeTaxReconciliationDeductionsDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value2118211024-16.666138.1791017-6.8699.7338.3083.0198.74-0.302119.2551310141515181915161718
Percentage of IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationNondeductibleExpense

us-gaap:IncomeTaxReconciliationNondeductibleExpense


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value826000.0411000.01239000.0275000.0161000.0203000.0483000.0243000.0
Percentage of IncomeTaxReconciliationNondeductibleExpense100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationOtherAdjustments

us-gaap:IncomeTaxReconciliationOtherAdjustments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-278000.0956000.0-84000.0-127000.0-635000.0111000.0-1666000.0-312000.0961000.0528000.0-1363000.0181000.0-255000.01202000.0-903000.0163000.0523000.0-255000.0-469000.0-137000.0200000.0139000.0138000.0-230000.0165000.094000.026000.0216000.0151000.0
Percentage of IncomeTaxReconciliationOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationTaxCreditsInvestment

us-gaap:IncomeTaxReconciliationTaxCreditsInvestment


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value801000.0801000.0669000.0316000.0129000.01321000.0
Percentage of IncomeTaxReconciliationTaxCreditsInvestment100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationTaxExemptIncome

us-gaap:IncomeTaxReconciliationTaxExemptIncome


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value310000.0319000.0333000.0324000.0323000.0313000.0308000.0276000.0309000.0345000.0335000.0375000.0504000.0581000.01146000.01187000.01160000.01179000.01114000.01020000.01028000.01100000.01116000.01082000.01054000.0962000.01003000.01033000.01048000.0
Percentage of IncomeTaxReconciliationTaxExemptIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value489000.0496000.0-1000.0412000.0323000.020000.0526000.0515000.0351000.028000.0540000.0432000.0429000.0-42000.0457000.0514000.0541000.0-35000.0649000.0702000.0764000.033000.0811000.0809000.0851000.0-687200.0686000.0687000.0689000.0442000.0351000.0356000.0351000.052000.0268000.0301000.0340000.095000.0246000.0257000.0260000.031000.0159000.0197000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncurredClaimsPropertyCasualtyAndLiability

us-gaap:IncurredClaimsPropertyCasualtyAndLiability


Incurred
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
Value107104103127101111106108103941231101019294123909390978081807364807676737168646561787061615864304646554554
Percentage of IncurredClaimsPropertyCasualtyAndLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1562000.01612000.01573000.01606000.01648000.01761000.01743000.01744000.02337000.0
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value235.9624323169.2952827185.5313128133.3843618153.3953321114.405
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value51643943668162495670535354645144536063525958
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value107104103127101111106108103941231101019294123909390978081
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LossOnSaleOfInvestments rli:TypeOfTransaction, us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:InvestmentType

us-gaap:LossOnSaleOfInvestments

rli:CallsAndMaturitiesOfMarketableSecurities, us-gaap:AvailableforsaleSecurities, us-gaap:DebtSecurities


Loss
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.0150.0480.0170.0010.0020.0070.007
Percentage of LossOnSaleOfInvestments100.0100.0100.0100.0100.0100.0100.0

rli:SalesOfMarketableSecurities, us-gaap:AvailableforsaleSecurities, us-gaap:DebtSecurities


Loss
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.0190.0270.2590.3561.060.1020.774
Percentage of LossOnSaleOfInvestments126.756.21523.535600.053000.01457.111057.1

us-gaap:LossOnSaleOfInvestments rli:TypeOfTransaction, us-gaap:InvestmentType

rli:SalesOfMarketableSecurities, us-gaap:EquitySecurities


Loss
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.6341.150.7862.0244.0992.6331.3090.4730.1190.592
Percentage of LossOnSaleOfInvestments4226.72395.84623.5202400.0204950.037614.318700.00.00.00.0

us-gaap:MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments rli:TypeOfTransaction, us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:InvestmentType

us-gaap:MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments

rli:CallsAndMaturitiesOfMarketableSecurities, us-gaap:AvailableforsaleSecurities, us-gaap:DebtSecurities


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.1360.2070.2790.230.1470.1380.864
Percentage of MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments100.0100.0100.0100.0100.0100.0100.0

rli:SalesOfMarketableSecurities, us-gaap:AvailableforsaleSecurities, us-gaap:DebtSecurities


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.230.9760.2361.1080.1652.168-0.095
Percentage of MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments169.1471.584.6481.7112.21571.0-11.0

us-gaap:MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments rli:TypeOfTransaction, us-gaap:InvestmentType

rli:SalesOfMarketableSecurities, us-gaap:EquitySecurities


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value35132.380.579-2.322150.0542.0863.8638.442
Percentage of MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments26315.46320.3853.0251.7-1579.610984.86.20.00.00.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1328000.01351000.01364000.01364000.01370000.01406000.01423000.01423000.01445000.01481000.0
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1477000.01488000.01493000.01480000.01503000.01486000.01477000.01438000.01402000.01395000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value15-43.7956.7221053-11.88-4.8541628296.066-7.034-8.385-26.417.8219.1411112-27.419-0.57225295.821-11.257-21.760.99617-8.6422621135.203-30.82420-5.98725
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value15-44.7476.1299.5553-13.031-5.4611527297.772-7.696-7.675-26.3984.4978.4441011-35.062-6.93119211.054-16.136-24.932-7.59510-12.353191710-1.946-33.48117-11.868215.891027-14.3312.765.248-9.40530
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value15-44.7479.5553-13.031152729-7.696-7.675-26.398
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherComprehensiveIncomeLossTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.0-11.91.62.514-3.5-1.54.17.47.8
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForLossesAndLossAdjustmentExpense

us-gaap:PaymentsForLossesAndLossAdjustmentExpense


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value74708366839191777475848167678763686397737062
Percentage of PaymentsForLossesAndLossAdjustmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2311451491831166915816611895
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireMarketableSecurities

us-gaap:PaymentsToAcquireMarketableSecurities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value783115141631-376.553184149132-520.938205253177-314.64212711988-398.1713716812814619619611018112963171123186152289
Percentage of PaymentsToAcquireMarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value108968477675495542724
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value104471313143814147.01326
Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments rli:TypeOfTransaction, us-gaap:InformationByCategoryOfDebtSecurity, us-gaap:InvestmentType

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments

rli:CallsAndMaturitiesOfMarketableSecurities, us-gaap:AvailableforsaleSecurities, us-gaap:DebtSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value108968477675495
Percentage of ProceedsFromSaleMaturityAndCollectionsOfInvestments100.0100.0100.0100.0100.0100.0100.0

rli:SalesOfMarketableSecurities, us-gaap:AvailableforsaleSecurities, us-gaap:DebtSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value10211625231922
Percentage of ProceedsFromSaleMaturityAndCollectionsOfInvestments9.822.119.133.434.336.223.1

us-gaap:ProceedsFromSaleMaturityAndCollectionsOfInvestments rli:TypeOfTransaction, us-gaap:InvestmentType

rli:SalesOfMarketableSecurities, us-gaap:EquitySecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value104471313143813157.01326
Percentage of ProceedsFromSaleMaturityAndCollectionsOfInvestments96.249.515.717.721.669.314.20.00.00.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value10211627192023404686
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0.4240.9520.5930.8620.1621.1510.6070.890.5240.494-1.7060.662-0.71-0.0123.3240.6971.1540.4037.6436.3596.4957.4084.7674.8793.1728.5917.0113.7116.784.2232.3467.1492.6572.7145.8814.08
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value206000.058000.066000.00015000.010000.0427000.0231000.0719000.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod


Share
Period End2021-06-302021-03-31
Value35000.051000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue


Share
Period End2021-06-302021-03-31
Value7.9993.42
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate


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
Value-0.232.302.273100.026900-0.00290.0298-0.00170-0.00450.036000.00010.0359000.00010.016000.00010.018000.00020.0192000.00020.0198000.00010.01920000.018900
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate100.0100.00.0100.00.0100.00.00.0100.0100.0100.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.0100.0100.00.00.00.0100.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate


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
Value0.0622.67022.44300.226800-0.00130.2284-0.00010-0.00050.229300-0.00040.229900-0.00050.23110.00020-0.00090.2298-0.0002-0.0003-0.01980.252-0.00010-0.00110.2552-0.00020-0.00150.25790.00010-0.00180.258500
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate100.0100.00.0100.00.0100.00.00.0100.0100.0100.00.0100.0100.00.00.0100.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate


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
Value0.420.27-0.020.394600.0154-0.0015-0.0001-0.00520.02940.000300.00670.02020.00010-0.00060.01950-0.0001-0.00160.01380.0001-0.00010.00350.011900-0.00060.01760.00070.0006-0.0040.01140-0.0005-0.00050.01-0.0016-0.0013-0.00060.0241-0.001-0.0008
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue


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
Value0.46.97.8614.4580.6652.5161.8763.216131.7950.701126.155.0017.1241.3273.4370.8913.624118.6527.61914111.7124.9084.9140.1111.0240.1155.211114.5341.4082.7460.0810.3411.5441.5444.9551.5544.7111.5531.13
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value093.2406.857.9758.6-0.443.310.3357.28-0.6-0.6-0.5162.5500.2148.0902.496.431.7833.690.2501.7830.09-3.00016.51-27.00.930.0450.89-5.0-1.492.2345.1
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-05-312019-06-302019-03-312018-12-312018-09-302018-05-312018-06-302018-03-312017-12-312017-09-302017-05-312017-06-302017-03-312016-12-312016-09-302016-05-312016-06-302016-03-312015-12-312015-09-302015-05-312015-06-302015-03-312014-12-312014-09-302014-05-312014-06-302014-03-312013-12-312013-09-302013-05-312013-06-302013-03-312012-12-312012-09-302012-05-312012-06-302012-03-312011-12-312011-09-302011-05-312011-06-302011-03-312010-12-312010-09-302010-05-312009-05-31
Value3.1813.82-0.09-1.15014.480.020.1413.651.9811.350.20.1810.311.049.160.050.017.91-0.558.49-0.090.0611.420.0911.320.210.18.94-0.038.970.1307.71-0.388.14-6.290.186.47-0.3813.37-0.02-0.1613.07-1.3914.68-0.060.1212.920.7112.14-0.17013.4210.82
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value-0.2756.043.213.21-3.3149.230.350.9110.9933.710.095.121.5930.010.80.04-7.8233.051.20.973.719.00.96-0.72.3116.660.98-0.36-0.2218.53-16.960.41-2.1436.09-2.23-0.23-0.7641.281.27
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value12.1797.64-0.53-1.23094.621.360.9114.266.160.61.04-1.1564.420.150.09-2.8959.77-0.610.332.5561.27-1.080.570.748.82-2.440.022.4540.43-36.951.042.169.48-5.03-0.77-3.3872.61-3.94
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1.3431.3926.7680.813.8632.3277.2172.8920.1551.0412.721
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1.3421.3926.7670.813.8622.3267.2152.8910.1541.0382.617
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised99.9100.0100.0100.0100.0100.0100.0100.099.499.796.2

us-gaap:CommonStock


Stock
Period End2021-06-302020-09-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.0010.0010.0010.0010.0020.0010.0010.0030.104
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised0.10.00.00.00.00.00.60.33.8

us-gaap:SubleaseIncome

us-gaap:SubleaseIncome


Sublease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value123000.0123000.0123000.096000.042000.0
Percentage of SubleaseIncome100.0100.0100.0100.0100.0

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense


Supplemental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1371421341561261261261231251131351201151079614010499103979695
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

us-gaap:SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense


Supplemental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-30.341-37.121-31.005-29.24-25.635-15.173-20.095-14.352-21.204-19.633-11.448-10.455-13.457-14.59-2.26-16.974-13.775-5.859-12.5840.607-16.027-13.99
Percentage of SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnderwritingIncomeLoss

us-gaap:UnderwritingIncomeLoss


Underwriting
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
Value3629271.1522417161314222.2377.76214178.976-14.9321913181026212233341727302622293125198.49918211426244520302130
Percentage of UnderwritingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnderwritingIncomeLoss us-gaap:StatementBusinessSegments

rli:CasualtySegment


Underwriting
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value262422139.733-1.3235.9492.376.9395.3438.699-1.9742.8541.561-1.4173.5548.648-6.881150.259119.1068.139139.6113166.0781620144.1043.0310110.5528.78723265.537138.97713
Percentage of UnderwritingIncomeLoss72.383.181.41214.740.3-7.736.117.346.523.8388.9-25.420.28.9-15.8-23.843.8-52.787.02.442.842.736.240.635.045.362.027.054.365.457.220.735.758.351.13.732.896.258.826.443.941.344.1

rli:PropertyInsuranceSegment


Underwriting
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value8.879-1.0050.694-19.9516.1679.9084.1316.202-0.4368.246-11.2662.6213.6475.8823.993-27.5192.8638.804-1.0790.4687.2456.198
Percentage of UnderwritingIncomeLoss24.3-3.42.6-1731.925.557.525.145.2-2.936.8-503.633.825.833.644.5184.314.567.4-5.94.427.829.1

rli:SuretyInsuranceSegment


Underwriting
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1.2746.0554.3257.118.2638.6546.3925.1598.4298.8444.8047.1157.645106.49.0338.232113.4419.8777.6466.0
Percentage of UnderwritingIncomeLoss3.520.216.0617.234.250.238.837.656.439.4214.891.754.057.471.3-60.541.785.318.993.129.428.2

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


Variable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value357000.0384000.0332000.0338000.0320000.0355000.0320000.0321000.0892000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost rli:NAICCreditQualityIndicator, us-gaap:CreditRatingMoodys, us-gaap:CreditRatingStandardPoors, us-gaap:InvestmentType

rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost

rli:NAICFiveRating, srt:MoodysCaa1Rating, rli:StandardPoorsCCCOrLowerRating, us-gaap:DebtSecurities


Available
Period End2021-06-302021-03-312020-09-30
Value1.2792.8014.086
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost100.0100.0100.0

rli:NAICFourRating, srt:MoodysB1Rating, srt:StandardPoorsBRating, us-gaap:DebtSecurities


Available
Period End2021-06-302021-03-312020-09-30
Value242642
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost1906.6935.41052.3

rli:NAICOneRating, rli:MoodysAaaOrAaOrARating, rli:StandardPoorsAAAOrAAOrARating, us-gaap:DebtSecurities


Available
Period End2021-06-302021-03-312020-09-30
Value317365152
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost24836.013039.23722.9

rli:NAICThreeRating, srt:MoodysBa1Rating, srt:StandardPoorsBBRating, us-gaap:DebtSecurities


Available
Period End2021-06-302021-03-312020-09-30
Value212326
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost1684.0851.1653.6

rli:NAICTwoRating, srt:MoodysBaa1Rating, srt:StandardPoorsBBBRating, us-gaap:DebtSecurities


Available
Period End2021-06-302021-03-312020-09-30
Value525525
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost4086.91984.1633.5

rli:NaicSixRating, srt:MoodysCaRating, rli:StandardPoorsCcOrLower, us-gaap:DebtSecurities


Available
Period End2020-09-30
Value0.172
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost4.2

rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost us-gaap:FinancialInstrument

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5663495051151933428517911245
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost4397.32270.50.01247.70.00.00.00.00.00.00.00.00.0

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value15218459115121243265078195470484117
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost11896.66589.60.02829.70.00.00.00.00.00.00.00.00.0

us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3.03.02.023.1241.8993.9543.9628.178.1781.896
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost234.6107.10.00.00.00.00.00.00.00.0

us-gaap:MortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value111954446221.5646356130246296373237
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost8683.93408.20.01137.40.00.00.00.00.00.00.00.00.0

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5.9385.9375.9375.936111623478417589
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost464.3212.00.0145.30.00.00.00.00.00.00.0

rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost us-gaap:InvestmentType

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2020-12-312019-12-31
Value4993
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost0.00.0

us-gaap:DebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value417473185251249
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost32613.416909.80.06166.50.0

us-gaap:MunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value88121253247
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAmortizedCost6936.84322.50.0806.50.0

rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost us-gaap:FinancialInstrument

rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value535633363513475261620478323
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value137170531101162381633457231539587
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost254.5302.1161.5305.4329.0177.122.5125.3270.9350.6669.0472.6373.5

us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-302021-03-312020-06-302020-03-312018-12-312018-09-30
Value3.03.02.023.1245.5716.28
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost5.65.35.72.311.87.5

us-gaap:MortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value88954446220.249216.2150.0011.38925155123
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost164.5169.4135.2127.663.40.228.823.40.06.754.1186.0526.0

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-31
Value5.9385.9375.9375.9362.5060.9997.277258
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost11.010.517.916.43.33.815.487.2248.8

rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost us-gaap:InvestmentType

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2020-12-312019-12-31
Value3375
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost100.0100.0

us-gaap:DebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value374452163232171
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost696.5802.3492.8640.3227.0

us-gaap:MunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value86121253247
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAmortizedCost161.0214.978.290.963.4

rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAmortizedCost us-gaap:FinancialInstrument

rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAmortizedCost

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2.4037.25516141516188.1661130322921
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value15146.3834.9575.855.2269.69416331231548829
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAmortizedCost630.5198.139.333.636.731.953.4207.9285.0402.8471.6304.4135.2

us-gaap:MortgageBackedSecurities


Available
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value220.2450.4711.3154249130245270218113
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAmortizedCost937.51.73.08.0232.3611.31115.6803.2825.5747.1522.3

rli:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAmortizedCost us-gaap:InvestmentType

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2020-12-312019-12-31
Value1618
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAmortizedCost100.0100.0

us-gaap:DebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value4221221978
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAmortizedCost1753.5298.1139.3135.3432.6

us-gaap:MunicipalBonds


Available
Period End2021-06-30
Value2.054
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAmortizedCost85.5

rli:CostBasisOfInvestmentInAffiliateIncludedInStatutorySurplus

rli:CostBasisOfInvestmentInAffiliateIncludedInStatutorySurplus


Cost
Period End2020-12-31
Value64
Percentage of CostBasisOfInvestmentInAffiliateIncludedInStatutorySurplus100.0

rli:DeferredTaxAssetLeaseLabilities

rli:DeferredTaxAssetLeaseLabilities


Deferred
Period End2020-12-312019-12-31
Value3971000.05140000.0
Percentage of DeferredTaxAssetLeaseLabilities100.0100.0

rli:DeferredTaxLiabilitiesDiscountingOfUnpaidLossesTCJAOffset

rli:DeferredTaxLiabilitiesDiscountingOfUnpaidLossesTCJAOffset


Deferred
Period End2020-12-312019-12-31
Value3181000.03817000.0
Percentage of DeferredTaxLiabilitiesDiscountingOfUnpaidLossesTCJAOffset100.0100.0

rli:DeferredTaxLiabilitiesUnrealizedGainsOnSecurities

rli:DeferredTaxLiabilitiesUnrealizedGainsOnSecurities


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
Value7756225166679273776351
Percentage of DeferredTaxLiabilitiesUnrealizedGainsOnSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:DeferredTaxLiabilityLeaseAssets

rli:DeferredTaxLiabilityLeaseAssets


Deferred
Period End2020-12-312019-12-31
Value3402000.04690000.0
Percentage of DeferredTaxLiabilityLeaseAssets100.0100.0

rli:DefinedContributionPlanSharesPurchasedAverageMarketPrice us-gaap:RetirementPlanType

rli:DefinedContributionPlanSharesPurchasedAverageMarketPrice

rli:EmployeeStockOwnershipPlan


Defined
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value82.6769.9962.858.0264.2
Percentage of DefinedContributionPlanSharesPurchasedAverageMarketPrice100.0100.0100.0100.0100.0

rli:FairValueOfInvestmentInAffiliateIncludedInStatutorySurplus

rli:FairValueOfInvestmentInAffiliateIncludedInStatutorySurplus


Fair
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value23819013210610411786
Percentage of FairValueOfInvestmentInAffiliateIncludedInStatutorySurplus100.0100.0100.0100.0100.0100.0100.0

rli:FundsHeld

rli:FundsHeld


Funds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value898581798480837876747273686774757574727772545454545351535958616457595657591111101099832
Percentage of FundsHeld100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:InvestmentContinuousUnrealizedLossPositionUnrealizedLossPercent rli:NAICCreditQualityIndicator, us-gaap:CreditRatingMoodys, us-gaap:CreditRatingStandardPoors, us-gaap:InvestmentType

rli:InvestmentContinuousUnrealizedLossPositionUnrealizedLossPercent

rli:NAICFiveRating, srt:MoodysCaa1Rating, rli:StandardPoorsCCCOrLowerRating, us-gaap:DebtSecurities


Investment
Period End2021-06-302021-03-312020-09-30
Value0.10.16.0
Percentage of InvestmentContinuousUnrealizedLossPositionUnrealizedLossPercent100.0100.0100.0

rli:NAICFourRating, srt:MoodysB1Rating, srt:StandardPoorsBRating, us-gaap:DebtSecurities


Investment
Period End2021-06-302021-03-312020-09-30
Value7.43.935.4
Percentage of InvestmentContinuousUnrealizedLossPositionUnrealizedLossPercent7400.03900.0590.0

rli:NAICOneRating, rli:MoodysAaaOrAaOrARating, rli:StandardPoorsAAAOrAAOrARating, us-gaap:DebtSecurities


Investment
Period End2021-06-302021-03-312020-09-30
Value81.784.134.3
Percentage of InvestmentContinuousUnrealizedLossPositionUnrealizedLossPercent81700.084100.0571.7

rli:NAICThreeRating, srt:MoodysBa1Rating, srt:StandardPoorsBBRating, us-gaap:DebtSecurities


Investment
Period End2021-06-302021-03-312020-09-30
Value2.82.514.2
Percentage of InvestmentContinuousUnrealizedLossPositionUnrealizedLossPercent2800.02500.0236.7

rli:NAICTwoRating, srt:MoodysBaa1Rating, srt:StandardPoorsBBBRating, us-gaap:DebtSecurities


Investment
Period End2021-06-302021-03-312020-09-30
Value8.09.49.7
Percentage of InvestmentContinuousUnrealizedLossPositionUnrealizedLossPercent8000.09400.0161.7

rli:NaicSixRating, srt:MoodysCaRating, rli:StandardPoorsCcOrLower, us-gaap:DebtSecurities


Investment
Period End2021-06-302021-03-312020-09-30
Value000.4
Percentage of InvestmentContinuousUnrealizedLossPositionUnrealizedLossPercent0.00.06.7

rli:InvestmentContinuousUnrealizedLossPositionUnrealizedLossesAsPercentOfCost us-gaap:InvestmentType

rli:InvestmentContinuousUnrealizedLossPositionUnrealizedLossesAsPercentOfCost

us-gaap:DebtSecurities


Investment
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.40.70.10.2
Percentage of InvestmentContinuousUnrealizedLossPositionUnrealizedLossesAsPercentOfCost100.0100.0100.0100.0

rli:InvestmentInSubsidiaries us-gaap:ConsolidatedEntities

rli:InvestmentInSubsidiaries

srt:ParentCompany


Investment
Period End2020-12-312019-12-312018-12-312017-12-31
Value11481034828912
Percentage of InvestmentInSubsidiaries100.0100.0100.0100.0

rli:LiabilityForAsbestosAndEnvironmentalClaimsCeded us-gaap:ShortdurationInsuranceContractsAccidentYear

rli:LiabilityForAsbestosAndEnvironmentalClaimsCeded

us-gaap:EnvironmentalIssue


Liability
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value4.6195.1495.3735.7154.9871211
Percentage of LiabilityForAsbestosAndEnvironmentalClaimsCeded100.0100.0100.0100.0100.0100.0100.0

rli:LineOfCreditFacilityConditionalExpansionMaximumBorrowingCapacity us-gaap:DebtInstrument

rli:LineOfCreditFacilityConditionalExpansionMaximumBorrowingCapacity

us-gaap:LineOfCredit


Line
Period End2020-12-31
Value120
Percentage of LineOfCreditFacilityConditionalExpansionMaximumBorrowingCapacity100.0

rli:NonRestrictedNetAssets dei:LegalEntity

rli:NonRestrictedNetAssets

rli:RLIInsuranceCompany


Non
Period End2020-12-31
Value25
Percentage of NonRestrictedNetAssets100.0

rli:OtherInvestmentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

rli:OtherInvestmentsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Other
Period End2020-12-312020-09-302020-06-302020-03-31
Value6.068101512
Percentage of OtherInvestmentsFairValueDisclosure100.0100.0100.0100.0

rli:OtherInvestmentsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Other
Period End2020-12-312020-09-302020-06-302020-03-31
Value6.068101512
Percentage of OtherInvestmentsFairValueDisclosure100.0100.0100.0100.0

rli:PercentageOfFixedIncomePortfolioRatedAOrBetter

rli:PercentageOfFixedIncomePortfolioRatedAOrBetter


Percentage
Period End2020-12-312020-09-302019-12-31
Value83.083.085.0
Percentage of PercentageOfFixedIncomePortfolioRatedAOrBetter100.0100.0100.0

rli:PercentageOfReinsuranceRecoverablesFromEntitiesWithFinancialStrengthRatingsOfAOrBetter

rli:PercentageOfReinsuranceRecoverablesFromEntitiesWithFinancialStrengthRatingsOfAOrBetter


Percentage
Period End2020-12-31
Value88.0
Percentage of PercentageOfReinsuranceRecoverablesFromEntitiesWithFinancialStrengthRatingsOfAOrBetter100.0

rli:PremiumsAndReinsuranceBalancesReceivable

rli:PremiumsAndReinsuranceBalancesReceivable


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value17714917415915415416015715813915213814313213412713312112613614811514317017414515417520316615215715911713915816613212411912710110783
Percentage of PremiumsAndReinsuranceBalancesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:PremiumsAndReinsuranceBalancesReceivableAllowances

rli:PremiumsAndReinsuranceBalancesReceivableAllowances


Premiums
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1818171717161616161716171616161616161515151514141313131414
Percentage of PremiumsAndReinsuranceBalancesReceivableAllowances100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

rli:ReinsuranceNetLossOnIndividualRiskMaximum

rli:ReinsuranceNetLossOnIndividualRiskMaximum


Reinsurance
Period End2020-12-31
Value3000000.0
Percentage of ReinsuranceNetLossOnIndividualRiskMaximum100.0

rli:ReinsuranceRecoverableOtherReconcilingItem

rli:ReinsuranceRecoverableOtherReconcilingItem


Reinsurance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value8088000.0982000.0980000.01729000.02185000.02691000.0
Percentage of ReinsuranceRecoverableOtherReconcilingItem100.0100.0100.0100.0100.0100.0

rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearEight rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments

rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearEight

rli:ClaimsMade, rli:CasualtySegment


Short
Period End2020-12-31
Value2.8
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearEight100.0

rli:ExcessOccurrence, rli:CasualtySegment


Short
Period End2020-12-31
Value10.8
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearEight385.7

rli:PrimaryOccurrence, rli:CasualtySegment


Short
Period End2020-12-31
Value3.9
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearEight139.3

rli:Transportation, rli:CasualtySegment


Short
Period End2020-12-31
Value1.7
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearEight60.7

rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearEight us-gaap:StatementBusinessSegments

rli:PropertyInsuranceSegment


Short
Period End2020-12-31
Value0.6
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearEight21.4

rli:SuretyInsuranceSegment


Short
Period End2020-12-31
Value-0.9
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearEight-32.1

rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearSeven rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments

rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearSeven

rli:ClaimsMade, rli:CasualtySegment


Short
Period End2020-12-31
Value4.6
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearSeven100.0

rli:ExcessOccurrence, rli:CasualtySegment


Short
Period End2020-12-31
Value5.4
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearSeven117.4

rli:PrimaryOccurrence, rli:CasualtySegment


Short
Period End2020-12-31
Value5.0
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearSeven108.7

rli:Transportation, rli:CasualtySegment


Short
Period End2020-12-31
Value2.5
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearSeven54.3

rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearSeven us-gaap:StatementBusinessSegments

rli:PropertyInsuranceSegment


Short
Period End2020-12-31
Value0.7
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearSeven15.2

rli:SuretyInsuranceSegment


Short
Period End2020-12-31
Value-1.4
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearSeven-30.4

rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearTen rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments

rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearTen

rli:ClaimsMade, rli:CasualtySegment


Short
Period End2020-12-31
Value26.6
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearTen100.0

rli:ExcessOccurrence, rli:CasualtySegment


Short
Period End2020-12-31
Value0
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearTen0.0

rli:PrimaryOccurrence, rli:CasualtySegment


Short
Period End2020-12-31
Value0.3
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearTen1.1

rli:Transportation, rli:CasualtySegment


Short
Period End2020-12-31
Value2.8
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearTen10.5

rli:ShortDurationInsuranceContractsHistoricalClaimDurationYearTen us-gaap:StatementBusinessSegments

rli:PropertyInsuranceSegment


Short
Period End2020-12-31
Value0
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearTen0.0

rli:SuretyInsuranceSegment


Short
Period End2020-12-31
Value-0.1
Percentage of ShortDurationInsuranceContractsHistoricalClaimDurationYearTen-0.4

rli:ShortDurationInsuranceContractsLiabilityForUnpaidClaimsRecoverableAmountAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments

rli:ShortDurationInsuranceContractsLiabilityForUnpaidClaimsRecoverableAmountAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented

rli:ClaimsMade, rli:CasualtySegment


Short
Period End2020-12-31
Value0.69
Percentage of ShortDurationInsuranceContractsLiabilityForUnpaidClaimsRecoverableAmountAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented100.0

rli:ExcessOccurrence, rli:CasualtySegment


Short
Period End2020-12-31
Value18
Percentage of ShortDurationInsuranceContractsLiabilityForUnpaidClaimsRecoverableAmountAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented2650.9

rli:PrimaryOccurrence, rli:CasualtySegment


Short
Period End2020-12-31
Value9.767
Percentage of ShortDurationInsuranceContractsLiabilityForUnpaidClaimsRecoverableAmountAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented1415.5

rli:Transportation, rli:CasualtySegment


Short
Period End2020-12-31
Value0.175
Percentage of ShortDurationInsuranceContractsLiabilityForUnpaidClaimsRecoverableAmountAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented25.4

rli:ShortDurationInsuranceContractsLiabilityForUnpaidClaimsRecoverableAmountAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented us-gaap:StatementBusinessSegments

rli:PropertyInsuranceSegment


Short
Period End2020-12-31
Value0.323
Percentage of ShortDurationInsuranceContractsLiabilityForUnpaidClaimsRecoverableAmountAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented46.8

rli:SuretyInsuranceSegment


Short
Period End2020-12-31
Value-0.06
Percentage of ShortDurationInsuranceContractsLiabilityForUnpaidClaimsRecoverableAmountAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented-8.7

rli:StockholdersEquityUnrestrictedLiquidAssets

rli:StockholdersEquityUnrestrictedLiquidAssets


Stockholders
Period End2020-12-31
Value64
Percentage of StockholdersEquityUnrestrictedLiquidAssets100.0

rli:ThresholdReinsuranceRecoverableFromIndividualReinsurerAsPercentageOfShareholdersEquity

rli:ThresholdReinsuranceRecoverableFromIndividualReinsurerAsPercentageOfShareholdersEquity


Threshold
Period End2020-12-31
Value2.0
Percentage of ThresholdReinsuranceRecoverableFromIndividualReinsurerAsPercentageOfShareholdersEquity100.0

rli:UnrealizedLossesAsPercentOfInvestment us-gaap:InvestmentType

rli:UnrealizedLossesAsPercentOfInvestment

us-gaap:DebtSecurities


Unrealized
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.30.50.10.2
Percentage of UnrealizedLossesAsPercentOfInvestment100.0100.0100.0100.0

us-gaap:AccruedInvestmentIncomeReceivable

us-gaap:AccruedInvestmentIncomeReceivable


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1716161515141414141414141414151515131413141314131512141315131512141214131411131213121416
Percentage of AccruedInvestmentIncomeReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedInvestmentIncomeReceivable us-gaap:InvestmentType

us-gaap:DebtSecurities


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value16140.01491413
Percentage of AccruedInvestmentIncomeReceivable92.892.50.192.492.5

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value6045754635276647412845453826523535275140393355474033635240345949343449453642585550274241
Percentage of AccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AociDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossCumulativeGainLossAfterTax

us-gaap:AociDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossCumulativeGainLossAfterTax


Aoci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value321000.0463000.0470000.0795000.01752000.05727000.0
Percentage of AociDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossCumulativeGainLossAfterTax100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value566555529466437368460339400419436426418392416407375402406406388331329321
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value229221532178214720681958198117611672154515341467144013791399141313781432131212511146121111811132
Percentage of AssetsFairValueDisclosure404.4387.9411.1460.3472.2531.6430.1518.0417.5368.8351.6343.9344.0351.6335.8346.7366.9356.4323.3307.9294.9365.8358.7351.7

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value272217117.0594.8031.770.00.00.00.00.00.0
Percentage of AssetsFairValueDisclosure4.84.03.42.61.61.30.40.00.00.00.00.00.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value288627312726262625132332244321002072
Percentage of AssetsFairValueDisclosure509.2492.0514.5562.9573.8632.9530.5618.0517.5

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1079413813470
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3.8373.7135.585.3475.2181.9082.5143.232.440.9830.3750.1130.436
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax3.63.94.04.00.00.03.60.00.00.00.00.00.0

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value504264585423333427122.8942.86212
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax46.744.746.743.80.00.047.20.00.00.00.00.00.0

us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-12-31
Value0.4550.4070.6670.5240.4010.1050.2950.290.1920.0740.143
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.40.40.50.40.00.00.40.00.00.00.0

us-gaap:MortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1314182021178.92106.6033.2111.7091.2993.42
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax12.214.813.615.40.00.012.70.00.00.00.00.00.0

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value3.0682.7833.974.2594.1784.8062.3622.7761.9871.0430.4030.1110.347
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax2.82.92.93.20.00.03.40.00.00.00.00.00.0

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value9.4989.539131415156.9948.7056.7742.9641.2320.0080.023
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax8.810.19.811.20.00.09.90.00.00.00.00.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:InvestmentType

us-gaap:MunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value2721312916
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax25.423.122.522.122.9

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value7.772152.5544.5982.653
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FinancialInstrument

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.5840.6580.4130.5571.2059.1160.4760.1440.1470.3410.8761.2830.315
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax7.54.416.212.10.00.017.90.00.00.00.00.00.0

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2.2454.6640.9333.4316.302190.8181.5091.6323.9116111.681
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax28.931.036.574.60.00.030.80.00.00.00.00.00.0

us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.1220.1480.0250.1130.1890.3290.2930.5310.2710.056
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax1.61.00.00.00.00.00.00.00.00.0

us-gaap:MortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2.4433.0190.7330.3010.0770.0190.5630.5711.45.4939.448144.078
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax31.420.128.76.50.00.021.20.00.00.00.00.00.0

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.7731.0730.2570.0360.0320.0610.1010.3840.9853.560.895
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax9.97.110.10.81.20.00.00.00.00.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:InvestmentType

us-gaap:MunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1.6055.4760.2180.2730.722
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax20.736.48.55.927.2

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312011-09-302011-06-302010-12-31
Value2219209620612030195619121915188118091772177617451727166116461680162115721596162415641512151814481431115511391093
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:ConsolidatedEntities

srt:ParentCompany


Available
Period End2020-12-312019-12-312018-12-312017-12-31
Value60425823
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis2.92.23.31.4

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value21821521320321423022217314914613712070
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis9.810.310.310.011.012.111.69.28.38.27.76.94.3

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value880796753750717685659675701684681675508
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis39.738.036.536.936.735.834.435.938.838.638.438.730.9

us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value8.2968.29610107.3167.3247.3339.2419.2498.1628.178.1787.501
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.40.40.50.50.40.40.40.50.50.50.50.50.5

us-gaap:MortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value354358384376388396411421402396402415329
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis16.017.118.618.519.820.721.522.422.322.422.723.820.0

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value28282828273236292931313018
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.31.41.41.41.41.71.91.61.61.81.81.81.1

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value15416117017517117118623219419219917792
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis7.07.78.38.68.88.99.712.310.810.811.310.25.6

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:InvestmentType

us-gaap:MunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-31
Value574528501486390314620
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis25.925.224.323.920.417.737.7

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value881059285
Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value891069386
Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value435382357341
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value457390386368
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value562522525548
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value597552575597
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value560512489475
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value588539519502
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value572573597580
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue


Available
Period End2021-06-302021-03-312020-12-312020-09-30
Value586587620605
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value23192175219621592075196319831957186517931760171917101653167217131651159016051687163115561538153215371529149515451534146714401379139914131378143213121251114612111181108411321273
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:ConsolidatedEntities

srt:ParentCompany


Available
Period End2020-12-312019-12-312018-12-312017-12-31
Value64455923
Percentage of AvailableForSaleSecuritiesDebtSecurities2.92.33.41.4

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value229121532178214720681958198119571865179317601719171016531672
Percentage of AvailableForSaleSecuritiesDebtSecurities98.899.099.299.499.799.899.9100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value272217117.0594.8031.77
Percentage of AvailableForSaleSecuritiesDebtSecurities1.21.00.80.60.30.20.1

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2212182182082182232241761511461361191009070
Percentage of AvailableForSaleSecuritiesDebtSecurities9.610.09.99.610.511.411.39.08.18.27.87.05.95.54.2

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value900810798793758683690668519
Percentage of AvailableForSaleSecuritiesDebtSecurities38.837.336.436.736.534.834.838.031.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value8.6298.55510107.6927.3167.6289.3429.1127.9437.6397.9077.8958.0837.588
Percentage of AvailableForSaleSecuritiesDebtSecurities0.40.40.50.50.40.40.40.50.50.40.40.50.50.50.5

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:MortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value365369402396409414420431408393395402354351328
Percentage of AvailableForSaleSecuritiesDebtSecurities15.817.018.318.419.721.121.222.021.922.022.523.420.721.319.6

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:MunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value600544532515455405405358336323320319444541636
Percentage of AvailableForSaleSecuritiesDebtSecurities25.925.024.223.922.020.720.518.318.018.018.218.626.032.838.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value313132333237383231323129301818
Percentage of AvailableForSaleSecuritiesDebtSecurities1.41.51.51.51.51.92.01.71.71.81.81.71.81.11.1

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16317018319018618619324020119420017314911791
Percentage of AvailableForSaleSecuritiesDebtSecurities7.07.88.38.89.09.59.812.310.810.911.410.18.77.15.5

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value272217117.0594.8031.77
Percentage of AvailableForSaleSecuritiesDebtSecurities1.21.00.80.60.30.20.1

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value231921752196215920751963198319571865179317601719171016531672
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:FairValueMeasurementsRecurring, rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2212182182082182232241761511461361191009070
Percentage of AvailableForSaleSecuritiesDebtSecurities9.610.09.99.610.511.411.39.08.18.27.87.05.95.54.2

us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-31
Value928833816804765688692668519
Percentage of AvailableForSaleSecuritiesDebtSecurities40.038.337.237.336.935.134.938.031.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value8.6298.55510107.6927.3167.6289.3429.1127.9437.6397.9077.8958.0837.588
Percentage of AvailableForSaleSecuritiesDebtSecurities0.40.40.50.50.40.40.40.50.50.40.40.50.50.50.5

us-gaap:FairValueMeasurementsRecurring, us-gaap:MortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value365369402396409414420431408393395402354351328
Percentage of AvailableForSaleSecuritiesDebtSecurities15.817.018.318.419.721.121.222.021.922.022.523.420.721.319.6

us-gaap:FairValueMeasurementsRecurring, us-gaap:MunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value600544532515455405405358336323320319444541636
Percentage of AvailableForSaleSecuritiesDebtSecurities25.925.024.223.922.020.720.518.318.018.018.218.626.032.838.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value313132333237383231323129301818
Percentage of AvailableForSaleSecuritiesDebtSecurities1.41.51.51.51.51.92.01.71.71.81.81.71.81.11.1

us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value16317018319018618619324020119420017314911791
Percentage of AvailableForSaleSecuritiesDebtSecurities7.07.88.38.89.09.59.812.310.810.911.410.18.77.15.5

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value22121821820821822322417615114613611970
Percentage of AvailableForSaleSecuritiesDebtSecurities9.610.09.99.610.511.411.39.08.18.27.87.04.2

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value928833816804765688692708726693668666519
Percentage of AvailableForSaleSecuritiesDebtSecurities40.038.337.237.336.935.134.936.239.038.738.038.831.0

us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value8.6298.55510107.6927.3167.6289.3429.1127.9437.6397.9077.588
Percentage of AvailableForSaleSecuritiesDebtSecurities0.40.40.50.50.40.40.40.50.50.40.40.50.5

us-gaap:MortgageBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value365369402396409414420431408393395402328
Percentage of AvailableForSaleSecuritiesDebtSecurities15.817.018.318.419.721.121.222.021.922.022.523.419.6

us-gaap:USGovernmentAgenciesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value31313233323738323132312918
Percentage of AvailableForSaleSecuritiesDebtSecurities1.41.51.51.51.51.92.01.71.71.81.81.71.1

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value16317018319018618619324020119420017391
Percentage of AvailableForSaleSecuritiesDebtSecurities7.07.88.38.89.09.59.812.310.810.911.410.15.5

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:InvestmentType

us-gaap:MunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-31
Value600544532515405320636
Percentage of AvailableForSaleSecuritiesDebtSecurities25.925.024.223.920.518.238.0

us-gaap:CompensationAndBenefitsTrust

us-gaap:CompensationAndBenefitsTrust


Compensation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value8251000.07926000.08292000.07703000.07600000.07980000.0
Percentage of CompensationAndBenefitsTrust100.0100.0100.0100.0100.0100.0

us-gaap:CompensationAndBenefitsTrust us-gaap:ConsolidatedEntities

srt:ParentCompany


Compensation
Period End2020-12-312019-12-31
Value8292000.07980000.0
Percentage of CompensationAndBenefitsTrust100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value204000.0375000.0397000.0632000.0985000.0878000.00
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLoss100.0100.0100.0100.0100.0100.00.0

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss us-gaap:FinancialInstrument

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2020-12-312020-09-302020-06-302020-03-31
Value17000.019000.054000.021000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLoss4.33.05.52.4

us-gaap:CorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value204000.0375000.0380000.0613000.0931000.0857000.0
Percentage of DebtSecuritiesAvailableForSaleAllowanceForCreditLoss100.0100.095.797.094.597.6

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2.3927.23516141515188.1011130322821
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value15146.2354.6695.1854.1829.34816321201478428
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger629.3196.238.632.033.327.151.8200.3281.1398.1459.8296.8132.5

us-gaap:MortgageBackedSecurities


Debt
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value210.2440.4681.2964149129239261206111
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger906.61.73.08.4231.3609.21111.1791.0813.2722.7515.6

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger us-gaap:InvestmentType

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2020-12-312019-12-31
Value1618
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger100.0100.0

us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value4121221977
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger1718.1296.2138.6133.7430.1

us-gaap:MunicipalBonds


Debt
Period End2021-06-30
Value1.964
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger82.1

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.0110.020.090.1580.3530.9960.1120.0650.0790.2220.6480.6030.23
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.0980.1770.1480.2880.6651.0440.3460.7520.6722.3176.8733.9950.891
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss890.9885.0164.4182.3188.4104.8308.91156.9850.61043.71060.6662.5387.4

us-gaap:MortgageBackedSecurities


Debt
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.8410.0010.0030.0190.4470.5651.45.4929.307112.649
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss7645.50.60.81.9399.1869.21772.22473.91436.31903.01151.7

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss us-gaap:InvestmentType

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2020-12-312019-12-31
Value0.090.112
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.0100.0

us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1.040.1970.2380.4470.9
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss9454.5985.0264.4282.9803.6

us-gaap:MunicipalBonds


Debt
Period End2021-06-30
Value0.09
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss818.2

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value535532353412674261620468223
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value134165521071102201632447030638786
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months253.2297.5160.7300.0320.8174.122.0122.9266.3344.8652.6467.0371.5

us-gaap:ForeignGovernmentDebtSecurities


Debt
Period End2021-06-302021-03-312020-06-302020-03-312018-12-312018-09-30
Value2.8782.8521.9953.0115.4326.214
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months5.45.15.82.411.67.5

us-gaap:MortgageBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value86924345220.249216.2090.0011.38825152122
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months163.2166.0134.3128.264.70.228.723.40.06.754.0183.6521.8

us-gaap:USTreasurySecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-31
Value5.1654.8645.685.92.5050.9987.2497258
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months9.78.717.316.53.33.815.587.2247.8

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months us-gaap:InvestmentType

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2020-12-312019-12-31
Value3274
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months100.0100.0

us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value368437160227169
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months691.4784.8490.6635.8225.8

us-gaap:MunicipalBonds


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value85115253247
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months159.9207.578.391.262.7

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.5730.6380.3230.3990.8528.120.3640.0790.0680.1190.2280.680.085
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2.1474.4870.7853.1435.637180.4720.7570.961.5939.2517.9060.79
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss374.7703.3243.0787.7661.6223.7129.7958.21411.81338.74057.51162.6929.4

us-gaap:ForeignGovernmentDebtSecurities


Debt
Period End2021-06-302021-03-312020-06-302020-03-312018-12-312018-09-30
Value0.1220.1480.0250.1130.1390.066
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss21.323.22.91.461.09.7

us-gaap:MortgageBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-03-312018-12-312018-09-302017-12-31
Value1.6023.0190.7330.30.0740.1160.0060.0010.1413.2741.429
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss279.6473.2226.975.28.731.97.60.861.8481.51681.2

us-gaap:USTreasurySecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302017-12-31
Value0.7731.0730.2570.0360.0010.0010.0210.6340.434
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss134.9168.279.69.00.31.39.293.2510.6

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss us-gaap:InvestmentType

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2020-12-312019-12-31
Value0.3230.364
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0

us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value6.732142.3164.1511.717
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss1174.92326.2717.01040.4471.7

us-gaap:MunicipalBonds


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1.5155.4760.2180.2730.722
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss264.4858.367.568.4198.4

us-gaap:DebtSecuritiesAvailableForSaleRestricted us-gaap:FederalHomeLoanBankAdvancesBranchOfFHLBBank

us-gaap:DebtSecuritiesAvailableForSaleRestricted

srt:FederalHomeLoanBankOfChicago


Debt
Period End2021-06-302021-03-312020-12-312020-09-30
Value9.6101213
Percentage of DebtSecuritiesAvailableForSaleRestricted100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition rli:NAICCreditQualityIndicator, us-gaap:CreditRatingMoodys, us-gaap:CreditRatingStandardPoors, us-gaap:InvestmentType

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition

rli:NAICFiveRating, srt:MoodysCaa1Rating, rli:StandardPoorsCCCOrLowerRating, us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-09-30
Value1.2742.7833.81
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition100.0100.0100.0

rli:NAICFourRating, srt:MoodysB1Rating, srt:StandardPoorsBRating, us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-09-30
Value232541
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition1868.7920.41085.9

rli:NAICOneRating, rli:MoodysAaaOrAaOrARating, rli:StandardPoorsAAAOrAAOrARating, us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-09-30
Value311352150
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition24435.212669.53951.2

rli:NAICThreeRating, srt:MoodysBa1Rating, srt:StandardPoorsBBRating, us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-09-30
Value212326
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition1673.6842.8683.8

rli:NAICTwoRating, srt:MoodysBaa1Rating, srt:StandardPoorsBBBRating, us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-09-30
Value515425
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition4053.81946.1667.6

rli:NaicSixRating, srt:MoodysCaRating, rli:StandardPoorsCcOrLower, us-gaap:DebtSecurities


Debt
Period End2020-09-30
Value0.155
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition4.1

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition us-gaap:FinancialInstrument

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5562485050141933428507911144
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition4368.72261.50.01323.40.00.00.00.00.00.00.00.00.0

us-gaap:CorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value14917958112115224254877191453472115
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition11767.16464.60.02944.60.00.00.00.00.00.00.00.00.0

us-gaap:ForeignGovernmentDebtSecurities


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2.8782.8521.9953.0111.713.6253.6697.6397.9071.84
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition225.9102.50.00.00.00.00.00.00.00.0

us-gaap:MortgageBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value108924346221.5456355129241286358233
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition8526.23321.80.01211.90.00.00.00.00.00.00.00.00.0

us-gaap:USTreasurySecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5.1654.8645.685.9101623468317188
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition405.4174.80.0154.90.00.00.00.00.00.00.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition us-gaap:InvestmentType

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2020-12-312019-12-31
Value4893
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition0.00.0

us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value409458183247246
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition32131.416478.80.06492.60.0

us-gaap:MunicipalBonds


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value87115253247
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition6838.14153.60.0857.80.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss rli:NAICCreditQualityIndicator, us-gaap:CreditRatingMoodys, us-gaap:CreditRatingStandardPoors, us-gaap:InvestmentType

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss

rli:NAICFiveRating, srt:MoodysCaa1Rating, rli:StandardPoorsCCCOrLowerRating, us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-09-30
Value0.0050.0180.276
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss100.0100.0100.0

rli:NAICFourRating, srt:MoodysB1Rating, srt:StandardPoorsBRating, us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-09-30
Value0.5780.5851.626
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss11560.03250.0589.1

rli:NAICOneRating, rli:MoodysAaaOrAaOrARating, rli:StandardPoorsAAAOrAAOrARating, us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-09-30
Value6.348121.577
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss126960.070211.1571.4

rli:NAICThreeRating, srt:MoodysBa1Rating, srt:StandardPoorsBBRating, us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-09-30
Value0.2160.3830.654
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss4320.02127.8237.0

rli:NAICTwoRating, srt:MoodysBaa1Rating, srt:StandardPoorsBBBRating, us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-09-30
Value0.6251.4140.448
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss12500.07855.6162.3

rli:NaicSixRating, srt:MoodysCaRating, rli:StandardPoorsCcOrLower, us-gaap:DebtSecurities


Debt
Period End2020-09-30
Value0.017
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss6.2

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss us-gaap:FinancialInstrument

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.5840.6580.4130.5571.2059.1160.4760.1440.1470.3410.8761.2830.315
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss11680.03655.60.0201.80.00.00.00.00.00.00.00.00.0

us-gaap:CorporateDebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2.2454.6640.9333.4316.302190.8181.5091.6323.9116111.681
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss44900.025911.10.01243.10.00.00.00.00.00.00.00.00.0

us-gaap:ForeignGovernmentDebtSecurities


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.1220.1480.0250.1130.1890.3290.2930.5310.2710.056
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss2440.0822.20.00.00.00.00.00.00.00.0

us-gaap:MortgageBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2.4433.0190.7330.3010.0770.0190.5630.5711.45.4939.448144.078
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss48860.016772.20.0109.10.00.00.00.00.00.00.00.00.0

us-gaap:USTreasurySecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.7731.0730.2570.0360.0320.0610.1010.3840.9853.560.895
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss15460.05961.10.013.00.00.00.00.00.00.00.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss us-gaap:InvestmentType

rli:AssetBackedSecuritiesAndCommercialMortgageBackedSecurities


Debt
Period End2020-12-312019-12-31
Value0.4130.476
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss0.00.0

us-gaap:DebtSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value7.8152.64.67.7282.653
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss156000.083333.30.01666.70.00.00.0

us-gaap:MunicipalBonds


Debt
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value1.6055.4760.2180.2730.722
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss32100.030422.20.098.90.0

us-gaap:DebtWeightedAverageInterestRate us-gaap:DebtInstrument

us-gaap:DebtWeightedAverageInterestRate

us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value4.910.04910.04910.04910.04910.04910.04910.05710.06020.06020.06020.0602
Percentage of DebtWeightedAverageInterestRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationPlanAssets us-gaap:RetirementPlanType

us-gaap:DeferredCompensationPlanAssets

rli:DeferredCompensationPlan


Deferred
Period End2020-12-31
Value49
Percentage of DeferredCompensationPlanAssets100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value13110566941181191371151151163136373324
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent us-gaap:ConsolidatedEntities

us-gaap:DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent

srt:ParentCompany


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value16141513
Percentage of DeferredIncomeTaxesAndOtherTaxLiabilitiesNoncurrent100.0100.0100.0100.0

us-gaap:DeferredPolicyAcquisitionCosts

us-gaap:DeferredPolicyAcquisitionCosts


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-312008-12-31
Value999288898784858685828484837777777671737575696972716565686862616362555255555192959172747578
Percentage of DeferredPolicyAcquisitionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


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
Value5049424053555557606456
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value389000.0275000.0616000.0578000.0685000.0657000.0453000.0604000.0433000.0298000.0264000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation


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
Value2829000.02981000.02700000.01435000.04727000.06231000.06143000.06193000.05614000.08746000.05496000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


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
Value2749000.02728000.02702000.02283000.04114000.04482000.05046000.04160000.04678000.03954000.03577000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsPolicyholderLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsPolicyholderLiabilities


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
Value2119182017171922252630
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsPolicyholderLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve


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
Value1918171626252423201916
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

us-gaap:DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost


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
Value1817171625242221183226
Percentage of DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1558000.01634000.01711000.0584000.01980000.03392000.03594000.04235000.04541000.04869000.0
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates

us-gaap:DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates


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
Value2117151318171412131311
Percentage of DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1530000.0536000.0576000.0204000.0291000.01004000.0571000.0592000.0938000.01190000.0196000.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3439000.03008000.03133000.03159000.04819000.04613000.03610000.02632000.01060000.02122000.01359000.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueToAffiliateCurrentAndNoncurrent us-gaap:ConsolidatedEntities

us-gaap:DueToAffiliateCurrentAndNoncurrent

srt:ParentCompany


Due
Period End2020-12-312019-12-312018-12-31
Value2556000.01310000.0130000.0
Percentage of DueToAffiliateCurrentAndNoncurrent100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value5600000.03600000.04200000.04800000.05800000.06700000.04900000.05600000.06200000.07000000.05000000.05700000.06300000.06900000.06200000.05700000.04800000.04500000.04300000.03600000.03700000.04100000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value1600000.0600000.0800000.01200000.01500000.0600000.0900000.01100000.0400000.0500000.0600000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized28.616.719.020.722.412.214.515.78.07.98.7

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:PlanName

rli:LongTermIncentivePlan2015


Employee
Period End2021-06-302021-03-312020-12-31
Value8400000.05400000.06400000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized0.00.00.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:Ownership

us-gaap:EquityMethodInvestmentOwnershipPercentage

rli:MauiJimInc


Equity
Period End2020-12-312019-12-312018-12-31
Value40.00.40.4
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0

rli:PrimeHoldingsInsuranceServicesIncPrime


Equity
Period End2020-12-312019-12-312018-12-31
Value23.00.230.23
Percentage of EquityMethodInvestmentOwnershipPercentage57.557.557.5

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

rli:MauiJimInc


Equity
Period End2020-12-312019-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value40.00.40.40.40.40.40.4
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.00.00.00.00.00.0

rli:PrimeHoldingsInsuranceServicesIncPrime


Equity
Period End2020-12-312019-12-312018-12-312015-12-312015-03-042014-12-312014-02-05
Value23.00.230.230.270.270.20.2
Percentage of EquityMethodInvestmentOwnershipPercentage57.557.557.50.00.00.00.0

us-gaap:EquityMethodInvestments

us-gaap:EquityMethodInvestments


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value14813412812811210810311310810094959185908884767282807470717165606764584962605552585653495150464344
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments us-gaap:ConsolidatedEntities

srt:ParentCompany


Equity
Period End2020-12-312019-12-312018-12-312017-12-31
Value90797977
Percentage of EquityMethodInvestments70.876.783.786.3

us-gaap:EquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

rli:MauiJimInc


Equity
Period End2020-12-312019-12-312018-12-312017-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value90797977625449525043
Percentage of EquityMethodInvestments70.876.783.786.388.690.4100.099.9100.1100.1

rli:PrimeHoldingsInsuranceServicesIncPrime


Equity
Period End2020-12-312019-12-312018-12-312017-12-312015-12-312014-12-31
Value322415128.15.7
Percentage of EquityMethodInvestments25.523.316.213.811.49.5

us-gaap:EquitySecuritiesFvNiCost

us-gaap:EquitySecuritiesFvNiCost


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value308298293280270272262260259234220210182
Percentage of EquitySecuritiesFvNiCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments


Fair
Period End2020-12-31
Value23
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments100.0

us-gaap:FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments us-gaap:InvestmentType

rli:InvestmentInPrivateFunds


Fair
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-31
Value9.36.58.38.31518
Percentage of FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments0.00.035.90.00.00.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FixedIncomeSecurities


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value272217117.14.81.77
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value4015000.03980000.03878000.03776000.03674000.03572000.03470000.03368000.03266000.03164000.03062000.02929000.02862000.05678000.04061000.04077000.03606000.05546000.05339000.05132000.04911000.04678000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-31
Value100000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo us-gaap:Range

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

srt:Maximum


Finite
Period End2020-12-31
Value100000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:IncomeTaxesReceivable us-gaap:ConsolidatedEntities

us-gaap:IncomeTaxesReceivable

srt:ParentCompany


Income
Period End2020-12-312019-12-31
Value1500000.0842000.0
Percentage of IncomeTaxesReceivable100.0100.0

us-gaap:InvestmentsAndCash

us-gaap:InvestmentsAndCash


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value303428762837274626452416256025142194
Percentage of InvestmentsAndCash100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value5101000.05941000.05992000.05937000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-312020-09-30
Value2773000.04466000.01494000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpense


Liability
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value175015741461127111391103
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpense100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-04-282011-03-312010-12-312009-12-312008-12-31
Value19171795175016861590157415741557150614791461137713431303127112531183115211391150112311211103114011421150112111521127114111291135111111111158113411091121115011791173721173117311461159
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability us-gaap:ShortdurationInsuranceContractsAccidentYear

us-gaap:EnvironmentalIssue


Liability
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value22222428284139
Percentage of LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability1.31.41.72.22.53.73.5

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-312011-04-282010-12-312009-12-312008-12-31
Value137213401306128612261208118911751143111410961057102899496996290288085185783382480578577479879653819810809
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet us-gaap:ShortdurationInsuranceContractsAccidentYear

us-gaap:EnvironmentalIssue


Liability
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value17171822232827
Percentage of LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet1.41.51.72.32.83.53.5

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity us-gaap:DebtInstrument

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity

us-gaap:LineOfCredit


Line
Period End2020-12-312019-12-312018-12-312018-05-082017-12-312016-12-312015-12-312014-12-312014-05-31
Value605050404040404025
Percentage of LineOfCreditFacilityCurrentBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument

us-gaap:LongTermDebtFairValue

rli:SeniorNotesDueOnSeptember152023


Long
Period End2020-12-31
Value165
Percentage of LongTermDebtFairValue100.0

us-gaap:LongTermNotesPayable

us-gaap:LongTermNotesPayable


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value149149149149149149149149149149149149149148148148148148148148148148149149149149149149149149149
Percentage of LongTermNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermNotesPayable us-gaap:ConsolidatedEntities

srt:ParentCompany


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value149149149148
Percentage of LongTermNotesPayable100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value2.352.332.322.320.02340.02340.0233
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherAssetsMiscellaneous us-gaap:ConsolidatedEntities

us-gaap:OtherAssetsMiscellaneous

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value895000.0400000.0547000.0156000.0
Percentage of OtherAssetsMiscellaneous100.0100.0100.0100.0

us-gaap:OtherInvestments

us-gaap:OtherInvestments


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value52505459635370595554513836353325252424242425201011111111
Percentage of OtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInvestments us-gaap:InvestmentType

rli:InvestmentInLowIncomeHousingTaxCreditPartnershipNetOfAmortization


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value18192021212223181919201414151516161717171818149.39.59.69.89.9
Percentage of OtherInvestments34.638.537.435.034.041.833.131.635.136.339.436.139.742.845.861.565.270.372.673.173.173.667.785.585.884.284.584.7

rli:InvestmentInPrivateFunds


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value3127322624174630
Percentage of OtherInvestments58.855.159.244.238.532.765.358.8

rli:InvestmentInRestrictedStock


Other
Period End2020-12-312020-09-302020-06-302020-03-31
Value6.1101512
Percentage of OtherInvestments11.217.724.922.6

us-gaap:OtherLiabilities

us-gaap:OtherLiabilities


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value63493662815654585674261621181814222525214430262224292347243213172412148.3292937126522544758
Percentage of OtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherSundryLiabilities us-gaap:ConsolidatedEntities

us-gaap:OtherSundryLiabilities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value837000.0521000.0527000.0570000.0
Percentage of OtherSundryLiabilities100.0100.0100.0100.0

us-gaap:PrepaidReinsurancePremiums

us-gaap:PrepaidReinsurancePremiums


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value12011111310293889388787171666557575452485254524952525249536272586069796973737461615958566265
Percentage of PrepaidReinsurancePremiums100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:QualifiedAffordableHousingProjectInvestmentsCommitment us-gaap:InvestmentType

us-gaap:QualifiedAffordableHousingProjectInvestmentsCommitment

rli:InvestmentInLowIncomeHousingTaxCreditPartnershipNetOfAmortization


Qualified
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-31
Value2400000.02700000.03800000.04700000.08600000.07400000.03100000.0
Percentage of QualifiedAffordableHousingProjectInvestmentsCommitment100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReinsurancePayable

us-gaap:ReinsurancePayable


Reinsurance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value3426423124302525211422181812212122161717171537383633383762444744412643656452502220182322
Percentage of ReinsurancePayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments

us-gaap:ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments


Reinsurance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value545454443399364366384382362364364320315308301291280271288292289297297335354359353
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments rli:InsuranceSecondaryGrouping, us-gaap:StatementBusinessSegments

rli:ClaimsMade, rli:CasualtySegment


Reinsurance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value223176144117113130
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments50.346.039.738.939.543.9

rli:ExcessOccurrence, rli:CasualtySegment


Reinsurance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value889881746980
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments20.025.622.224.624.227.1

rli:PrimaryOccurrence, rli:CasualtySegment


Reinsurance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value353134364347
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments7.98.19.512.015.115.8

rli:Transportation, rli:CasualtySegment


Reinsurance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value535350464125
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments12.014.013.915.414.38.4

us-gaap:ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments us-gaap:StatementBusinessSegments

rli:PropertyInsuranceSegment


Reinsurance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value402150281714
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments9.15.613.89.56.14.9

rli:SuretyInsuranceSegment


Reinsurance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4.01711117.079108.863
Percentage of ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments0.92.93.22.33.73.0

us-gaap:ReinsuranceRecoverables

us-gaap:ReinsuranceRecoverables


Reinsurance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312010-12-312009-12-31
Value5404694293493333323553621516
Percentage of ReinsuranceRecoverables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReinsuranceRecoverables us-gaap:CededCreditRisk

rli:AllOtherReinsurers


Reinsurance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1951371259685727071
Percentage of ReinsuranceRecoverables36.129.229.327.625.621.719.819.9

us-gaap:ReinsuranceRecoverables us-gaap:CreditRatingAMBest, us-gaap:CreditRatingStandardPoors, us-gaap:CededCreditRisk

srt:AMBestAPlusRating, srt:StandardPoorsAAMinusRating, rli:HannoverRuckversicherung


Reinsurance
Period End2020-12-312019-12-312018-12-31
Value282422
Percentage of ReinsuranceRecoverables5.35.35.3

srt:AMBestAPlusRating, srt:StandardPoorsAAMinusRating, rli:MunichReAmericaHSB


Reinsurance
Period End2020-12-312019-12-312018-12-31
Value736873
Percentage of ReinsuranceRecoverables13.614.617.1

srt:AMBestAPlusRating, srt:StandardPoorsAAMinusRating, rli:ScorRe


Reinsurance
Period End2020-12-31
Value28
Percentage of ReinsuranceRecoverables5.3

srt:AMBestAPlusRating, srt:StandardPoorsAAMinusRating, rli:SwissReWestportInsCorp


Reinsurance
Period End2020-12-312019-12-312018-12-31
Value263435
Percentage of ReinsuranceRecoverables4.97.48.2

srt:AMBestAPlusRating, srt:StandardPoorsAPlusRating, rli:BerkleyInsuranceCo


Reinsurance
Period End2020-12-312019-12-312018-12-31
Value322823
Percentage of ReinsuranceRecoverables5.96.15.4

srt:AMBestAPlusRating, srt:StandardPoorsAPlusRating, rli:EnduranceRe


Reinsurance
Period End2020-12-312019-12-312018-12-31
Value393228
Percentage of ReinsuranceRecoverables7.36.96.7

srt:AMBestAPlusRating, srt:StandardPoorsAPlusRating, rli:Renaissancere


Reinsurance
Period End2020-12-312019-12-31
Value4125
Percentage of ReinsuranceRecoverables7.75.5

srt:AMBestARating, srt:StandardPoorsAPlusRating, rli:ToaRe


Reinsurance
Period End2020-12-312019-12-312018-12-31
Value222318
Percentage of ReinsuranceRecoverables4.15.14.3

srt:AMBestARating, srt:StandardPoorsARating, rli:AspenUKLtd


Reinsurance
Period End2020-12-312019-12-312018-12-31
Value313127
Percentage of ReinsuranceRecoverables5.96.76.5

srt:AMBestARating, srt:StandardPoorsARating, rli:Libertymutual


Reinsurance
Period End2020-12-312019-12-31
Value2119
Percentage of ReinsuranceRecoverables3.94.1

us-gaap:ReinsuranceRecoverablesOnPaidLossesAllowance

us-gaap:ReinsuranceRecoverablesOnPaidLossesAllowance


Reinsurance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1615151515151516151514131313
Percentage of ReinsuranceRecoverablesOnPaidLossesAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReinsuranceRecoverablesOnUnpaidLossesAllowance

us-gaap:ReinsuranceRecoverablesOnUnpaidLossesAllowance


Reinsurance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value9.228.9538.6348.0978.0358.5399.49.793101011131414
Percentage of ReinsuranceRecoverablesOnUnpaidLossesAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedInvestments

us-gaap:RestrictedInvestments


Restricted
Period End2020-12-31
Value77
Percentage of RestrictedInvestments100.0

us-gaap:RetainedEarningsUndistributedEarningsFromEquityMethodInvestees

us-gaap:RetainedEarningsUndistributedEarningsFromEquityMethodInvestees


Retained
Period End2020-12-31
Value106
Percentage of RetainedEarningsUndistributedEarningsFromEquityMethodInvestees100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber


Share
Period End2021-06-302021-03-312020-12-312019-12-31
Value44474749
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.0418260.0289460.0437080.043530.0444310.029793
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber0.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue


Share
Period End2021-06-302021-03-312020-12-312019-12-31
Value97.3581.5881.5370.07
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value63.0761.860.3559.0357.754.6853.9352.7852.1747.8446.6245.644.0440.2738.6636.335.7731.8931.2331.129.7427.2423.623.8922.4820.8420.0222.2922.0220.6620.3642.1839.6636.9736.5740.7840.5939.839.843.6242.0240.7937.9644.343.5940.17
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value49605429304046544532294833323233294249657780756165696543514758464138292830343721241917138.37713
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-31
Value31282820212023242216162222192125222527354538343541363628302226232722191920181912151112108.12811
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet rli:InsuranceSecondaryGrouping, us-gaap:ShortdurationInsuranceContractsAccidentYear, us-gaap:StatementBusinessSegments

us-gaap:ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet

rli:ClaimsMade, us-gaap:ShortDurationInsuranceContractAccidentYear2019, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-31
Value8.1231.839
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet100.0100.0

rli:ClaimsMade, us-gaap:ShortDurationInsuranceContractAccidentYear2020, rli:CasualtySegment


Shortduration
Period End2020-12-31
Value1.488
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet18.3

rli:ClaimsMade, us-gaap:ShortDurationInsuranceContractsAccidentYear2017, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-31
Value3622112.455
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet449.61235.90.00.0

rli:ClaimsMade, us-gaap:ShortDurationInsuranceContractsAccidentYear2018, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-31
Value18111.964
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet231.9650.60.0

rli:ClaimsMade, us-gaap:ShortdurationInsuranceContractsAccidentYear2011, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value107.2397.1326.8356.2095.6375.9474.5081.9490.33
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet133.8393.60.00.00.00.00.00.00.00.0

rli:ClaimsMade, us-gaap:ShortdurationInsuranceContractsAccidentYear2012, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value16161514109.2186.8984.0860.433
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet208.0894.50.00.00.00.00.00.00.0

rli:ClaimsMade, us-gaap:ShortdurationInsuranceContractsAccidentYear2013, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value3534322926187.0730.792
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet436.71877.90.00.00.00.00.00.0

rli:ClaimsMade, us-gaap:ShortdurationInsuranceContractsAccidentYear2014, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value46444035279.7751.705
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet567.82399.50.00.00.00.00.0

rli:ClaimsMade, us-gaap:ShortdurationInsuranceContractsAccidentYear2015, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value32282016102.215
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet396.91565.80.00.00.00.0

rli:ClaimsMade, us-gaap:ShortdurationInsuranceContractsAccidentYear2016, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value473927142.06
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet590.92140.80.00.00.0

rli:ExcessOccurrence, us-gaap:ShortDurationInsuranceContractAccidentYear2019, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-31
Value194.213
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet234.4229.1

rli:ExcessOccurrence, us-gaap:ShortDurationInsuranceContractAccidentYear2020, rli:CasualtySegment


Shortduration
Period End2020-12-31
Value2.901
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet35.7

rli:ExcessOccurrence, us-gaap:ShortDurationInsuranceContractsAccidentYear2017, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-31
Value159.2755.6790.017
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet190.1504.40.00.0

rli:ExcessOccurrence, us-gaap:ShortDurationInsuranceContractsAccidentYear2018, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-31
Value105.8232.506
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet133.0316.60.0

rli:ExcessOccurrence, us-gaap:ShortdurationInsuranceContractsAccidentYear2011, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2121201716108.7936.9815.1452.169
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet259.01143.90.00.00.00.00.00.00.00.0

rli:ExcessOccurrence, us-gaap:ShortdurationInsuranceContractsAccidentYear2012, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value2221191716158.8433.5731.315
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet273.31195.90.00.00.00.00.00.00.0

rli:ExcessOccurrence, us-gaap:ShortdurationInsuranceContractsAccidentYear2013, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2118171614105.7011.06
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet261.31007.30.00.00.00.00.00.0

rli:ExcessOccurrence, us-gaap:ShortdurationInsuranceContractsAccidentYear2014, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value26232218114.0061.899
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet320.91271.10.00.00.00.00.0

rli:ExcessOccurrence, us-gaap:ShortdurationInsuranceContractsAccidentYear2015, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value31282319102.048
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet386.01563.70.00.00.00.0

rli:ExcessOccurrence, us-gaap:ShortdurationInsuranceContractsAccidentYear2016, rli:CasualtySegment


Shortduration
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value12107.4413.3961.068
Percentage of ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet156.4546.70.00.00.0

rli:PrimaryOccurrence, us-gaap:ShortDurationInsuranceContractAccidentYear2019, rli:CasualtySegment


Shortduration