Related Party Transactions and Major Customers (Details) (USD $)
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3 Months Ended |
12 Months Ended |
Dec. 31, 2014
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Sep. 30, 2014
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Jun. 30, 2014
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Mar. 31, 2014
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Related Party Transaction [Line Items] |
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Gross premiums written |
$ 132,780,000us-gaap_PremiumsWrittenGross |
$ 200,992,000us-gaap_PremiumsWrittenGross |
$ 511,540,000us-gaap_PremiumsWrittenGross |
$ 705,260,000us-gaap_PremiumsWrittenGross |
$ 84,122,000us-gaap_PremiumsWrittenGross |
$ 182,649,000us-gaap_PremiumsWrittenGross |
$ 703,223,000us-gaap_PremiumsWrittenGross |
$ 635,418,000us-gaap_PremiumsWrittenGross |
$ 1,550,572,000us-gaap_PremiumsWrittenGross |
$ 1,605,412,000us-gaap_PremiumsWrittenGross |
$ 1,551,591,000us-gaap_PremiumsWrittenGross |
Gross premiums earned |
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1,450,047,000us-gaap_AssumedPremiumsEarned |
1,482,511,000us-gaap_AssumedPremiumsEarned |
1,465,701,000us-gaap_AssumedPremiumsEarned |
Acquisition expenses |
39,749,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
37,550,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
33,477,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
33,700,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
31,026,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
37,699,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
31,767,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
25,009,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
144,476,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
125,501,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
113,542,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense |
Net reinsurance costs and recoveries |
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(30,634,000)us-gaap_ReinsuranceCostsAndRecoveriesNet |
(13,852,000)us-gaap_ReinsuranceCostsAndRecoveriesNet |
(78,280,000)us-gaap_ReinsuranceCostsAndRecoveriesNet |
Reserve for claims and claim expenses |
1,412,510,000us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense |
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1,563,730,000us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense |
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1,412,510,000us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense |
1,563,730,000us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense |
1,879,377,000us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense |
Distributions received |
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10,300,000us-gaap_EquityMethodInvestmentDividendsOrDistributions |
9,900,000us-gaap_EquityMethodInvestmentDividendsOrDistributions |
9,900,000us-gaap_EquityMethodInvestmentDividendsOrDistributions |
Equity interest investment in related party |
143,632,000us-gaap_EquityMethodInvestmentAggregateCost |
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139,382,000us-gaap_EquityMethodInvestmentAggregateCost |
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143,632,000us-gaap_EquityMethodInvestmentAggregateCost |
139,382,000us-gaap_EquityMethodInvestmentAggregateCost |
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Catastrophe Reinsurance and Specialty Reinsurance | Gross Premiums Written |
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Related Party Transaction [Line Items] |
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Percent of gross premiums received |
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89.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
88.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
84.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
Number of significant customers |
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3rnr_NumberOfSignificantCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
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Catastrophe Reinsurance and Specialty Reinsurance | Gross Premiums Written | AON Benfield |
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Related Party Transaction [Line Items] |
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Percent of gross premiums received |
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56.10%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_MajorCustomersAxis = rnr_AonBenfieldMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
48.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_MajorCustomersAxis = rnr_AonBenfieldMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
51.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_MajorCustomersAxis = rnr_AonBenfieldMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
Catastrophe Reinsurance and Specialty Reinsurance | Gross Premiums Written | Marsh Inc. |
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Related Party Transaction [Line Items] |
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Percent of gross premiums received |
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21.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_MajorCustomersAxis = rnr_MarshIncMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
22.70%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_MajorCustomersAxis = rnr_MarshIncMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
21.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_MajorCustomersAxis = rnr_MarshIncMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
Catastrophe Reinsurance and Specialty Reinsurance | Gross Premiums Written | Willis Group |
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Related Party Transaction [Line Items] |
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Percent of gross premiums received |
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11.90%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_MajorCustomersAxis = rnr_WillisGroupMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
16.90%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_MajorCustomersAxis = rnr_WillisGroupMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
11.70%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = rnr_GrossPremiumsWrittenMember / us-gaap_MajorCustomersAxis = rnr_WillisGroupMember / us-gaap_StatementBusinessSegmentsAxis = rnr_CatastropheReinsuranceandSpecialtyReinsuranceSegmentsMember |
Tower Hill |
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Related Party Transaction [Line Items] |
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Gross premiums written |
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40,000,000us-gaap_PremiumsWrittenGross / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
46,700,000us-gaap_PremiumsWrittenGross / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
41,100,000us-gaap_PremiumsWrittenGross / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
Gross premiums earned |
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41,900,000us-gaap_AssumedPremiumsEarned / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
44,900,000us-gaap_AssumedPremiumsEarned / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
36,100,000us-gaap_AssumedPremiumsEarned / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
Acquisition expenses |
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4,700,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
5,300,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
3,900,000us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
Related party receivables |
18,300,000us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
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20,200,000us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
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18,300,000us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
20,200,000us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
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Net reinsurance costs and recoveries |
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3,600,000us-gaap_ReinsuranceCostsAndRecoveriesNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
4,100,000us-gaap_ReinsuranceCostsAndRecoveriesNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
4,000,000us-gaap_ReinsuranceCostsAndRecoveriesNet / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
Reserve for claims and claim expenses |
40,300,000us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
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37,100,000us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
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40,300,000us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
37,100,000us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
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Distributions received |
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10,000,000us-gaap_EquityMethodInvestmentDividendsOrDistributions / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
9,800,000us-gaap_EquityMethodInvestmentDividendsOrDistributions / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TowerHillMember |
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Angus |
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Related Party Transaction [Line Items] |
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Equity interest investment in related party |
10,500,000us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_AngusMember |
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10,500,000us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_AngusMember |
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Ownership % |
40.40%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_AngusMember |
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40.40%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_AngusMember |
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Related party income |
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0us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_AngusMember |
5,000,000us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_AngusMember |
7,900,000us-gaap_RelatedPartyTransactionOtherRevenuesFromTransactionsWithRelatedParty / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_AngusMember |
Top Layer Re |
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Related Party Transaction [Line Items] |
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Distributions received |
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0us-gaap_EquityMethodInvestmentDividendsOrDistributions / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TopLayerReMember |
0us-gaap_EquityMethodInvestmentDividendsOrDistributions / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TopLayerReMember |
0us-gaap_EquityMethodInvestmentDividendsOrDistributions / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TopLayerReMember |
Management fees revenue |
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$ 2,800,000us-gaap_ManagementFeesRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TopLayerReMember |
$ 3,800,000us-gaap_ManagementFeesRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TopLayerReMember |
$ 4,100,000us-gaap_ManagementFeesRevenue / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rnr_TopLayerReMember |