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Organization (Details) (USD $) In Millions, except Share data, unless otherwise specified | 0 Months Ended |  |  |
--- | --- | --- | --- | ---
Aug. 20, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Jun. 15, 2012
Organization [Line Items] |  |  |  |
Ownership percentage |  |  |  | 85.00%us-gaap_MinorityInterestOwnershipPercentageByParent
Sale of stock, price per share (in dollars per share) |  | $ 15.05 us-gaap_SharePrice | $ 10.89 us-gaap_SharePrice |
Hiscox | Catastrophe Fund Manager |  |  |  |
Organization [Line Items] |  |  |  |
Ownership percentage |  |  |  | 15.00%us-gaap_MinorityInterestOwnershipPercentageByParent / us-gaap_CounterpartyNameAxis = tpre_HiscoxMember / dei_LegalEntityAxis = tpre_ThirdPointReinsuranceInvestmentManagementLtd.Member
IPO |  |  |  |
Organization [Line Items] |  |  |  |
Issuance of common shares (in shares) | 24,832,484 us-gaap_StockIssuedDuringPeriodSharesNewIssues / tpre_SaleofStockAxis = us-gaap_IPOMember |  |  |
Sale of stock, price per share (in dollars per share) | $ 12.50 us-gaap_SharePrice / tpre_SaleofStockAxis = us-gaap_IPOMember |  |  |
Sale of stock, net proceeds | $ 286.0 us-gaap_ProceedsFromIssuanceInitialPublicOffering / tpre_SaleofStockAxis = us-gaap_IPOMember |  |  |

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- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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