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Non-controlling interests - Narrative (Details) (USD $) | 12 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2012 | Jun. 15, 2012
Noncontrolling Interest [Line Items] |  |  |  |  |
Ownership percentage |  |  |  |  | 85.00%us-gaap_MinorityInterestOwnershipPercentageByParent
Noncontrolling interest, increase from contributed capital | $ 25,300,000 tpre_NoncontrollingInterestIncreasefromContributedCapital |  |  |  |
Third Point Hellenic Recovery US Feeder Fund, L.P. |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Estimated fair value of investment | 5,300,000 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = tpre_ThirdPointHellenicRecoveryUSFeederFundL.P.Member | 6,800,000 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = tpre_ThirdPointHellenicRecoveryUSFeederFundL.P.Member |  |  |
Ownership percentage | 2.00%tpre_OwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = tpre_ThirdPointHellenicRecoveryUSFeederFundL.P.Member | 2.00%tpre_OwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = tpre_ThirdPointHellenicRecoveryUSFeederFundL.P.Member |  |  |
Committed capital, amount called | 4,300,000 tpre_CommittedCapitalAmountCalled / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = tpre_ThirdPointHellenicRecoveryUSFeederFundL.P.Member | 1,600,000 tpre_CommittedCapitalAmountCalled / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = tpre_ThirdPointHellenicRecoveryUSFeederFundL.P.Member |  |  |
Committed Capital, Amount Distributed |  | 700,000 tpre_CommittedCapitalAmountDistributed / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = tpre_ThirdPointHellenicRecoveryUSFeederFundL.P.Member |  |  |
Third Point Reinsurance Opportunities Fund Ltd |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Estimated fair value of investment | 54,800,000 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceOpportunitiesFundLtdMember | 58,600,000 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceOpportunitiesFundLtdMember |  | 22,000,000 us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceOpportunitiesFundLtdMember |
Ownership percentage | 53.00%tpre_OwnershipPercentage / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceOpportunitiesFundLtdMember | 49.90%tpre_OwnershipPercentage / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceOpportunitiesFundLtdMember |  |  |
Ownership percentage of nonparticipating shares | 100.00%tpre_OwnershipPercentageofNonparticipatingSharesbyParent / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceOpportunitiesFundLtdMember | 100.00%tpre_OwnershipPercentageofNonparticipatingSharesbyParent / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceOpportunitiesFundLtdMember |  |  |
Ownership percentage of participating shares | 100.00%tpre_OwnershipPercentageofParticipatingSharesbyParent / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceOpportunitiesFundLtdMember | 100.00%tpre_OwnershipPercentageofParticipatingSharesbyParent / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceOpportunitiesFundLtdMember |  |  |
Committed capital, amount called | 53,000,000 tpre_CommittedCapitalAmountCalled / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceOpportunitiesFundLtdMember |  |  |  |
Third Point Reinsurance Company Limited |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Committed capital, amount called | 28,000,000 tpre_CommittedCapitalAmountCalled / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceCompanyLtdMember |  |  |  |
Hiscox | Catastrophe Fund Manager |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Ownership percentage | 15.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_CounterpartyNameAxis = tpre_ThirdPointReinsuranceInvestmentManagementLtd.Member / dei_LegalEntityAxis = tpre_HiscoxMember | 15.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_CounterpartyNameAxis = tpre_ThirdPointReinsuranceInvestmentManagementLtd.Member / dei_LegalEntityAxis = tpre_HiscoxMember |  |  |
Joint Venture - Third Point Advisors LLC share |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |
Distributions | $ 35,100,000 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / dei_LegalEntityAxis = tpre_ThirdPointAdvisorsLLCMember | $ 51,000,000 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / dei_LegalEntityAxis = tpre_ThirdPointAdvisorsLLCMember | $ 35,100,000 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / dei_LegalEntityAxis = tpre_ThirdPointAdvisorsLLCMember | $ 0 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders / dei_LegalEntityAxis = tpre_ThirdPointAdvisorsLLCMember |

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- Definition Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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