0001620459-21-000076 | 10-Q | XBRL Viewer | James River Group Holdings LTD

Other Operating Expenses and Other Expenses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Operating Expenses and Other Expenses [Abstract]
Other operating expenses of the Corporate and Other segment	$ 7,915	$ 7,472	$ 15,971	$ 15,751

Label	Element	Value
Fee Income	jrvr_FeeIncome	$ 0
Fee Income	jrvr_FeeIncome	296,000
Fee Income	jrvr_FeeIncome	0
Fee Income	jrvr_FeeIncome	1,571,000
Fee Income	jrvr_FeeIncome	954,000
Fee Income	jrvr_FeeIncome	448,000
Fee Income	jrvr_FeeIncome	1,881,000
Fee Income	jrvr_FeeIncome	784,000
Fee Income	jrvr_FeeIncome	954,000
Fee Income	jrvr_FeeIncome	744,000
Fee Income	jrvr_FeeIncome	1,881,000
Fee Income	jrvr_FeeIncome	2,355,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	165,217,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	147,604,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	0
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	164,986,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	231,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	165,217,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	0
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	147,296,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	308,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	147,604,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	165,217,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	165,217,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	147,604,000
Fair Value, Option, Loans Held as Assets, Aggregate Fair Value	jrvr_FairValueOptionLoansHeldasAssetsAggregateFairValue	147,604,000
Proceeds From Maturities From Bank Loan Participations	jrvr_ProceedsFromMaturitiesOfBankLoanParticipations	23,713,000
Proceeds From Maturities From Bank Loan Participations	jrvr_ProceedsFromMaturitiesOfBankLoanParticipations	17,238,000
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	26,917,000
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	2,138,000
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	(3,321,000)
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	0
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	25,734,000
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	16,095,000
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	1,430,000
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	(2,637,000)
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	0
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	14,888,000
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	(124,029,000)
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	3,404,000
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	(4,946,000)
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	0
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	(125,571,000)
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	24,207,000
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	442,000
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	(2,430,000)
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	0
Underwriting Profit Loss Of Operating Segments	jrvr_UnderwritingProfitLossOfOperatingSegments	22,219,000
Fair Value, Option, Loans Held as Assets, Aggregate Unpaid Principal Balance	jrvr_FairValueOptionLoansHeldasAssetsAggregateUnpaidPrincipalBalance	170,200,000
Bank Loan Participations, Changes in Fair Value	jrvr_BankLoanParticipationsChangesinFairValue	2,340,000
Bank Loan Participations, Changes in Fair Value	jrvr_BankLoanParticipationsChangesinFairValue	26,570,000
Bank Loan Participations, Changes in Fair Value	jrvr_BankLoanParticipationsChangesinFairValue	6,250,000
Bank Loan Participations, Changes in Fair Value	jrvr_BankLoanParticipationsChangesinFairValue	(17,377,000)
Residential Mortgage Backed Amortized Cost	jrvr_ResidentialMortgageBackedAmortizedCost	282,773,000
Residential Mortgage Backed Fair Value	jrvr_ResidentialMortgageBackedFairValue	285,981,000
Commercial Mortgage And Asset Backed Amortized Cost	jrvr_CommercialMortgageAndAssetBackedAmortizedCost	332,316,000
Bank Loan Participations, Gross Realized Loss	jrvr_BankLoanParticipationsGrossRealizedLoss	523,000
Bank Loan Participations, Gross Realized Loss	jrvr_BankLoanParticipationsGrossRealizedLoss	9,669,000
Bank Loan Participations, Gross Realized Loss	jrvr_BankLoanParticipationsGrossRealizedLoss	783,000
Bank Loan Participations, Gross Realized Loss	jrvr_BankLoanParticipationsGrossRealizedLoss	10,978,000
Commercial Mortgage And Asset Backed Fair Value	jrvr_CommercialMortgageAndAssetBackedFairValue	339,941,000
Bank Loan Participations, Net Gain (Loss)	jrvr_BankLoanParticipationsNetGainLoss	1,937,000
Bank Loan Participations, Net Gain (Loss)	jrvr_BankLoanParticipationsNetGainLoss	17,131,000
Bank Loan Participations, Net Gain (Loss)	jrvr_BankLoanParticipationsNetGainLoss	5,785,000
Bank Loan Participations, Net Gain (Loss)	jrvr_BankLoanParticipationsNetGainLoss	(28,023,000)
Bank Loan Participations, Gross Realized Gain	jrvr_BankLoanParticipationsGrossRealizedGain	120,000
Bank Loan Participations, Gross Realized Gain	jrvr_BankLoanParticipationsGrossRealizedGain	230,000
Bank Loan Participations, Gross Realized Gain	jrvr_BankLoanParticipationsGrossRealizedGain	318,000
Bank Loan Participations, Gross Realized Gain	jrvr_BankLoanParticipationsGrossRealizedGain	$ 332,000
Number Of Insurance Companies	jrvr_NumberOfInsuranceCompanies	5
Number Of Insurance Companies	jrvr_NumberOfInsuranceCompanies	2
Proceeds From Bank Loan Participations	jrvr_ProceedsFromBankLoanParticipations	$ 36,059,000
Proceeds From Bank Loan Participations	jrvr_ProceedsFromBankLoanParticipations	$ 103,933,000
Number Of Bank Loan Participations Held	jrvr_NumberOfBankLoanParticipationsHeld	1
Number Of Bank Loan Participations Held	jrvr_NumberOfBankLoanParticipationsHeld	1
Number Of Bank Loan Participations Held	jrvr_NumberOfBankLoanParticipationsHeld	1
Payment To Acquire Bank Loan Participations	jrvr_PaymentToAcquireBankLoanParticipations	$ 71,011,000
Payment To Acquire Bank Loan Participations	jrvr_PaymentToAcquireBankLoanParticipations	24,107,000
Proceeds From Maturities And Repayments Of Other Invested Assets	jrvr_ProceedsFromMaturitiesAndRepaymentsOfOtherInvestedAssets	0
Proceeds From Maturities And Repayments Of Other Invested Assets	jrvr_ProceedsFromMaturitiesAndRepaymentsOfOtherInvestedAssets	$ 13,612,000
Number Of Equity Securities Held	jrvr_NumberOfEquitySecuritiesHeld	1
Number Of Equity Securities Held	jrvr_NumberOfEquitySecuritiesHeld	2
Number Of Equity Securities Held	jrvr_NumberOfEquitySecuritiesHeld	1
Number Of Equity Securities Held	jrvr_NumberOfEquitySecuritiesHeld	2
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments, Gross	jrvr_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustmentsGross	$ 935,896,000
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments, Gross	jrvr_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustmentsGross	727,437,000
Proceeds From Other Invested Asset Return Of Capital	jrvr_ProceedsFromOtherInvestedAssetReturnOfCapital	336,000
Proceeds From Other Invested Asset Return Of Capital	jrvr_ProceedsFromOtherInvestedAssetReturnOfCapital	251,000
Net Cash Provided by (Used in) Operating Activities Excluding Change in Collateral Funds	jrvr_NetCashProvidedByUsedInOperatingActivitiesExcludingChangeInCollateralFunds	43,400,000
Net Cash Provided by (Used in) Operating Activities Excluding Change in Collateral Funds	jrvr_NetCashProvidedByUsedInOperatingActivitiesExcludingChangeInCollateralFunds	42,100,000
Restricted Stock Unit Dividend Equivalents	jrvr_RestrictedStockUnitDividendEquivalents	221,000
Restricted Stock Unit Dividend Equivalents	jrvr_RestrictedStockUnitDividendEquivalents	219,000
Payments for (Proceeds from) Unsettled Investments, Net	jrvr_PaymentsforProceedsfromUnsettledInvestmentsNet	(16,229,000)
Payments for (Proceeds from) Unsettled Investments, Net	jrvr_PaymentsforProceedsfromUnsettledInvestmentsNet	(19,098,000)
Short Term Investments And Other, Changes in Fair Value	jrvr_ShortTermInvestmentsAndOtherChangesInFairValue	10,000
Short Term Investments And Other, Changes in Fair Value	jrvr_ShortTermInvestmentsAndOtherChangesInFairValue	80,000
Short Term Investments And Other, Changes in Fair Value	jrvr_ShortTermInvestmentsAndOtherChangesInFairValue	21,000
Short Term Investments And Other, Changes in Fair Value	jrvr_ShortTermInvestmentsAndOtherChangesInFairValue	80,000
Bank Loan Participations, Increase (Decrease) in Fair Value, Credit-Related Impairment	jrvr_BankLoanParticipationsIncreaseDecreaseinFairValueCreditRelatedImpairment	0
Bank Loan Participations, Increase (Decrease) in Fair Value, Credit-Related Impairment	jrvr_BankLoanParticipationsIncreaseDecreaseinFairValueCreditRelatedImpairment	0
Bank Loan Participations, Increase (Decrease) in Fair Value, Credit-Related Impairment	jrvr_BankLoanParticipationsIncreaseDecreaseinFairValueCreditRelatedImpairment	2,800,000
Bank Loan Participations, Increase (Decrease) in Fair Value, Credit-Related Impairment	jrvr_BankLoanParticipationsIncreaseDecreaseinFairValueCreditRelatedImpairment	7,800,000
Short Term Investments And Other Gross Realized Gains	jrvr_ShortTermInvestmentsAndOtherGrossRealizedGains	0
Short Term Investments And Other Gross Realized Gains	jrvr_ShortTermInvestmentsAndOtherGrossRealizedGains	31,000
Short Term Investments And Other Gross Realized Gains	jrvr_ShortTermInvestmentsAndOtherGrossRealizedGains	5,000
Short Term Investments And Other Gross Realized Gains	jrvr_ShortTermInvestmentsAndOtherGrossRealizedGains	50,000
Underwriting Profit (Loss)	jrvr_UnderwritingProfitLoss	17,819,000
Underwriting Profit (Loss)	jrvr_UnderwritingProfitLoss	7,416,000
Underwriting Profit (Loss)	jrvr_UnderwritingProfitLoss	(141,542,000)
Underwriting Profit (Loss)	jrvr_UnderwritingProfitLoss	6,468,000
Short Term Investments And Other Gross Realized Gains (Losses)	jrvr_ShortTermInvestmentsAndOtherGrossRealizedGainsLosses	10,000
Short Term Investments And Other Gross Realized Gains (Losses)	jrvr_ShortTermInvestmentsAndOtherGrossRealizedGainsLosses	111,000
Short Term Investments And Other Gross Realized Gains (Losses)	jrvr_ShortTermInvestmentsAndOtherGrossRealizedGainsLosses	26,000
Short Term Investments And Other Gross Realized Gains (Losses)	jrvr_ShortTermInvestmentsAndOtherGrossRealizedGainsLosses	$ 128,000
Number of Credit Facilities	jrvr_NumberofCreditFacilities	3
Letter Of Credit Facility Amount	jrvr_LetterOfCreditFacilityAmount	$ 75,000,000.0
Letter Of Credit Facility Amount	jrvr_LetterOfCreditFacilityAmount	102,500,000
Carrying Values Of Limited Partnerships Held	jrvr_CarryingValuesOfLimitedPartnershipsHeld	2,800,000
Carrying Values Of Limited Partnerships Held	jrvr_CarryingValuesOfLimitedPartnershipsHeld	26,300,000
Carrying Values Of Limited Partnerships Held	jrvr_CarryingValuesOfLimitedPartnershipsHeld	3,600,000
Carrying Values Of Limited Partnerships Held	jrvr_CarryingValuesOfLimitedPartnershipsHeld	10,800,000
Other Income And Expenses	jrvr_OtherIncomeAndExpenses	(827,000)
Other Income And Expenses	jrvr_OtherIncomeAndExpenses	(1,485,000)
Other Income And Expenses	jrvr_OtherIncomeAndExpenses	(1,349,000)
Other Income And Expenses	jrvr_OtherIncomeAndExpenses	(1,159,000)
Equity Method Investment, Transfer	jrvr_EquityMethodInvestmentTransfer	26,300,000
Equity Method Investment, Transfer	jrvr_EquityMethodInvestmentTransfer	(26,300,000)
Equity Method Investment, Transfer	jrvr_EquityMethodInvestmentTransfer	(5,100,000)
Equity Method Investment, Transfer	jrvr_EquityMethodInvestmentTransfer	5,100,000
Assets Deposited For Securing Letters Of Credit	jrvr_AssetsDepositedForSecuringLettersOfCredit	9,600,000
Assets Deposited For Securing Letters Of Credit	jrvr_AssetsDepositedForSecuringLettersOfCredit	115,000,000.0
Assets Deposited For Securing Letters Of Credit	jrvr_AssetsDepositedForSecuringLettersOfCredit	28,300,000
Notes Receivable	jrvr_NotesReceivable	4,500,000
Notes Receivable	jrvr_NotesReceivable	13,500,000
Notes Receivable	jrvr_NotesReceivable	17,883,000
Notes Receivable	jrvr_NotesReceivable	4,500,000
Notes Receivable	jrvr_NotesReceivable	$ 5,302,000
Share Based Arrangement by Share Based Award Option Contractual Life	jrvr_ShareBasedArrangementbyShareBasedAwardOptionContractualLife	7 years
Cash Equivalent Collateral Held In Trust Arrangement	jrvr_CashEquivalentCollateralHeldInTrustArrangement	$ 820,800,000
Commitment to Investment In Limited Partnership	jrvr_CommitmentToInvestmentInLimitedPartnership	7,200,000
Cash Equivalent Collateral Held In Trust Account	jrvr_CashEquivalentCollateralHeldInTrustAccount	97,300,000
Short Term Investments And Other Gross Realized Losses	jrvr_ShortTermInvestmentsAndOtherGrossRealizedLosses	0
Short Term Investments And Other Gross Realized Losses	jrvr_ShortTermInvestmentsAndOtherGrossRealizedLosses	0
Short Term Investments And Other Gross Realized Losses	jrvr_ShortTermInvestmentsAndOtherGrossRealizedLosses	0
Short Term Investments And Other Gross Realized Losses	jrvr_ShortTermInvestmentsAndOtherGrossRealizedLosses	2,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization of Discount	jrvr_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetAmortizationofDiscount	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization of Discount	jrvr_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetAmortizationofDiscount	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization of Discount	jrvr_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetAmortizationofDiscount	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Amortization of Discount	jrvr_FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetAmortizationofDiscount	3,000
Carrying Value Of Collateralized Loan Obligation Held	jrvr_CarryingValueOfCollateralizedLoanObligationHeld	$ 520,000

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