XML 54 R53.htm IDEA: XBRL DOCUMENT v2.4.1.9
INVESTMENTS (Details 6) - 10K (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 30, 2014
Available-for-sale      
Amortized Cost $ 1,641,739,000us-gaap_AvailableForSaleSecuritiesAmortizedCost $ 1,649,897,000us-gaap_AvailableForSaleSecuritiesAmortizedCost  
Fair Value 1,905,729,000us-gaap_AvailableForSaleSecurities 1,858,706,000us-gaap_AvailableForSaleSecurities  
Gross Unrealized Gains 271,109,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments 237,742,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments  
Gross Unrealized Losses (7,119,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments (28,933,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments  
Held-to-maturity      
Amortized Cost   651,000us-gaap_HeldToMaturitySecurities  
Fair Value 0us-gaap_HeldToMaturitySecuritiesFairValue 687,000us-gaap_HeldToMaturitySecuritiesFairValue  
Gross Unrecognized Gains   36,000us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain  
Total fixed income and equity securities      
Amortized Cost 1,641,739,000us-gaap_InvestmentOwnedAtCost 1,650,548,000us-gaap_InvestmentOwnedAtCost  
Fair Value 1,905,729,000us-gaap_InvestmentsFairValueDisclosure 1,859,393,000us-gaap_InvestmentsFairValueDisclosure  
Gross Unrealized Gains 271,109,000rli_InvestmentsGrossUnrealizedGain 237,778,000rli_InvestmentsGrossUnrealizedGain  
Gross Unrealized Losses (7,119,000)rli_InvestmentsGrossUnrealizedLosses (28,933,000)rli_InvestmentsGrossUnrealizedLosses  
U.S. government      
Available-for-sale      
Amortized Cost 33,668,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasurySecuritiesMember
17,086,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasurySecuritiesMember
 
Fair Value 33,788,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasurySecuritiesMember
17,303,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasurySecuritiesMember
 
Gross Unrealized Gains 131,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasurySecuritiesMember
217,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasurySecuritiesMember
 
Gross Unrealized Losses (11,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasurySecuritiesMember
   
U.S. Agency      
Available-for-sale      
Amortized Cost 6,385,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
10,513,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
 
Fair Value 6,747,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
10,298,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
 
Gross Unrealized Gains 362,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
22,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
 
Gross Unrealized Losses   (237,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_USGovernmentAgenciesDebtSecuritiesMember
 
Non-U.S. govt. & agency      
Available-for-sale      
Amortized Cost 9,862,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
13,306,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
 
Fair Value 10,665,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
13,678,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
 
Gross Unrealized Gains 803,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
437,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
 
Gross Unrealized Losses   (65,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember
 
Mtge/ABS/CMO      
Available-for-sale      
Amortized Cost 390,337,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= rli_MortgageBackedAndAssetBackedSecuritiesAndCollateralizedMortgageObligationsMember
350,187,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= rli_MortgageBackedAndAssetBackedSecuritiesAndCollateralizedMortgageObligationsMember
 
Fair Value 399,772,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= rli_MortgageBackedAndAssetBackedSecuritiesAndCollateralizedMortgageObligationsMember
350,725,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= rli_MortgageBackedAndAssetBackedSecuritiesAndCollateralizedMortgageObligationsMember
 
Gross Unrealized Gains 11,222,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= rli_MortgageBackedAndAssetBackedSecuritiesAndCollateralizedMortgageObligationsMember
8,188,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= rli_MortgageBackedAndAssetBackedSecuritiesAndCollateralizedMortgageObligationsMember
 
Gross Unrealized Losses (1,787,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= rli_MortgageBackedAndAssetBackedSecuritiesAndCollateralizedMortgageObligationsMember
(7,650,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= rli_MortgageBackedAndAssetBackedSecuritiesAndCollateralizedMortgageObligationsMember
 
Corporate Debt      
Available-for-sale      
Amortized Cost 543,183,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateDebtSecuritiesMember
511,748,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateDebtSecuritiesMember
 
Fair Value 562,690,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateDebtSecuritiesMember
526,038,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateDebtSecuritiesMember
 
Gross Unrealized Gains 23,697,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateDebtSecuritiesMember
22,302,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateDebtSecuritiesMember
 
Gross Unrealized Losses (4,190,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateDebtSecuritiesMember
(8,012,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateDebtSecuritiesMember
 
Municipal      
Available-for-sale      
Amortized Cost 464,769,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
528,209,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
 
Fair Value 481,425,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
522,010,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
 
Gross Unrealized Gains 16,789,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
6,495,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
 
Gross Unrealized Losses (133,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
(12,694,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
 
General obligations to state and local governments Percentage 49.00%rli_GeneralObligationsToStateAndLocalGovernmentsPercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
   
Revenue based obligations percentage 51.00%rli_RevenueBasedObligationsPercentage
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
   
Percentage of securities of portfolio rated as AA or better 90.00%rli_AvailableForSaleSecuritiesPercentageOfSecuritiesRatedAsAAOrBetter
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
   
Percentage of securities of portfolio rated as A or better 99.00%rli_AvailableForSaleSecuritiesPercentageOfSecuritiesRatedAsAOrBetter
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
   
Held-to-maturity      
Amortized Cost   651,000us-gaap_HeldToMaturitySecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
 
Fair Value   687,000us-gaap_HeldToMaturitySecuritiesFairValue
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
 
Gross Unrecognized Gains   36,000us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
/ us-gaap_InvestmentTypeAxis
= us-gaap_MunicipalBondsMember
 
Debt securities      
Available-for-sale      
Amortized Cost 1,448,204,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_DebtSecuritiesMember
1,431,049,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_DebtSecuritiesMember
 
Fair Value 1,495,087,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_DebtSecuritiesMember
1,440,052,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_DebtSecuritiesMember
 
Gross Unrealized Gains 53,004,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_DebtSecuritiesMember
37,661,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_DebtSecuritiesMember
 
Gross Unrealized Losses (6,121,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_DebtSecuritiesMember
(28,658,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_DebtSecuritiesMember
 
Equity securities      
Available-for-sale      
Amortized Cost 193,535,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
218,848,000us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
 
Fair Value 410,642,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
418,654,000us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
 
Gross Unrealized Gains 218,105,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
200,081,000rli_AvailableForSaleSecuritiesGrossUnrealizedGainAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
 
Gross Unrealized Losses (998,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
(275,000)rli_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember
 
(Increase) decrease in Gross Unrealized Losses     $ 700,000rli_IncreaseDecreaseInAvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquitySecuritiesMember