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v2.4.1.9

Significant accounting policies - Income taxes and uncertain tax positions (Details) (USD $) | 3 Months Ended | 9 Months Ended | 0 Months Ended
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Apr. 01, 2014 | Mar. 31, 2014 | Apr. 01, 2015
Income Tax Contingency [Line Items] |  |  |  |  |  |  |
Income tax expense | $ 1,542,000 us-gaap_IncomeTaxExpenseBenefit | $ 0 us-gaap_IncomeTaxExpenseBenefit | $ 3,917,000 us-gaap_IncomeTaxExpenseBenefit | $ 0 us-gaap_IncomeTaxExpenseBenefit |  |  |
Provision for uncertain tax positions | 1,700,000 us-gaap_LiabilityForUncertainTaxPositionsCurrent |  | 1,700,000 us-gaap_LiabilityForUncertainTaxPositionsCurrent |  |  |  |
Increase (decrease) in uncertain tax positions | (300,000)tpre_IncreasedecreaseinUncertainTaxPositions | 0 tpre_IncreasedecreaseinUncertainTaxPositions | (1,700,000)tpre_IncreasedecreaseinUncertainTaxPositions | 0 tpre_IncreasedecreaseinUncertainTaxPositions |  |  |
Income Tax Expense [Member] |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |
Investment income, tax expense | (1,200,000)tpre_InvestmentIncomeTaxExpense / us-gaap_IncomeStatementLocationAxis = tpre_IncomeTaxExpenseMember |  | (2,200,000)tpre_InvestmentIncomeTaxExpense / us-gaap_IncomeStatementLocationAxis = tpre_IncomeTaxExpenseMember |  |  |  |
Net investment income |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |
Investment income, tax expense |  | 300,000 tpre_InvestmentIncomeTaxExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_InvestmentIncomeMember |  | 700,000 tpre_InvestmentIncomeTaxExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_InvestmentIncomeMember |  |  |
TPRUK [Member] | Her Majesty's Revenue and Customs (HMRC) [Member] |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |
Corporate income tax rate |  |  |  |  | 21.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = tpre_HerMajestysRevenueandCustomsHMRCMember / dei_LegalEntityAxis = tpre_TPRUKMember | 23.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = tpre_HerMajestysRevenueandCustomsHMRCMember / dei_LegalEntityAxis = tpre_TPRUKMember |
Income tax expense | $ 3,000 us-gaap_IncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = tpre_HerMajestysRevenueandCustomsHMRCMember / dei_LegalEntityAxis = tpre_TPRUKMember |  | $ 20,000 us-gaap_IncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = tpre_HerMajestysRevenueandCustomsHMRCMember / dei_LegalEntityAxis = tpre_TPRUKMember |  |  |  |
TPRUK [Member] | Her Majesty's Revenue and Customs (HMRC) [Member] | Scenario, Forecast [Member] |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |
Corporate income tax rate |  |  |  |  |  |  | 20.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = tpre_HerMajestysRevenueandCustomsHMRCMember / dei_LegalEntityAxis = tpre_TPRUKMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember

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- Definition Increase (decrease) in Uncertain Tax Positions + References No definition available. + Details
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- Definition Investment Income, Tax Expense + References No definition available. + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition The current portion of the amount recognized for uncertain tax positions as of the balance sheet date. + 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 210.5-02.20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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