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Net investment income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended							9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net Investment Income [Abstract]
Net unrealized gains on investments and investment derivatives	$ (62,448)tpre_ChangeinNetUnrealizedGainsLossesonInvestmentsandInvestmentDerivatives	$ 7,404tpre_ChangeinNetUnrealizedGainsLossesonInvestmentsandInvestmentDerivatives						$ (67,407)tpre_ChangeinNetUnrealizedGainsLossesonInvestmentsandInvestmentDerivatives	$ 31,709tpre_ChangeinNetUnrealizedGainsLossesonInvestmentsandInvestmentDerivatives	$ 78,950tpre_ChangeinNetUnrealizedGainsLossesonInvestmentsandInvestmentDerivatives	$ 113,422tpre_ChangeinNetUnrealizedGainsLossesonInvestmentsandInvestmentDerivatives
Net realized gains on investments and investment derivatives	53,378tpre_NetRealizedGainsLossesonInvestmentAndDerivatives	63,778tpre_NetRealizedGainsLossesonInvestmentAndDerivatives						184,686tpre_NetRealizedGainsLossesonInvestmentAndDerivatives	176,673tpre_NetRealizedGainsLossesonInvestmentAndDerivatives	236,333tpre_NetRealizedGainsLossesonInvestmentAndDerivatives	55,632tpre_NetRealizedGainsLossesonInvestmentAndDerivatives
Net gain (loss) on foreign currencies	13,125us-gaap_ForeignCurrencyTransactionGainLossRealized	(1,353)us-gaap_ForeignCurrencyTransactionGainLossRealized						4,851us-gaap_ForeignCurrencyTransactionGainLossRealized	4,364us-gaap_ForeignCurrencyTransactionGainLossRealized	21,106us-gaap_ForeignCurrencyTransactionGainLossRealized	(219)us-gaap_ForeignCurrencyTransactionGainLossRealized
Dividend and interest income, net of withholding taxes										14,233tpre_DividendandInterestIncomeNetofWithholdingTaxes	25,284tpre_DividendandInterestIncomeNetofWithholdingTaxes
Dividend and investment income	6,628us-gaap_InvestmentIncomeInterestAndDividend	4,287us-gaap_InvestmentIncomeInterestAndDividend						22,405us-gaap_InvestmentIncomeInterestAndDividend	15,587us-gaap_InvestmentIncomeInterestAndDividend
Dividends paid on securities sold, not yet purchased	0tpre_DividendsPaidonSecuritiesSoldNotYetPurchased	(171)tpre_DividendsPaidonSecuritiesSoldNotYetPurchased						(34)tpre_DividendsPaidonSecuritiesSoldNotYetPurchased	(607)tpre_DividendsPaidonSecuritiesSoldNotYetPurchased	(722)tpre_DividendsPaidonSecuritiesSoldNotYetPurchased	(1,629)tpre_DividendsPaidonSecuritiesSoldNotYetPurchased
Management and performance fees	(8,440)tpre_ManagementandPerformanceFees	(19,558)tpre_ManagementandPerformanceFees						(46,630)tpre_ManagementandPerformanceFees	(57,750)tpre_ManagementandPerformanceFees	(87,333)tpre_ManagementandPerformanceFees	(50,211)tpre_ManagementandPerformanceFees
Other expenses	(1,573)tpre_InvestmentIncomeOtherInvestmentExpense	(1,860)tpre_InvestmentIncomeOtherInvestmentExpense						(6,743)tpre_InvestmentIncomeOtherInvestmentExpense	(4,383)tpre_InvestmentIncomeOtherInvestmentExpense	(8,863)tpre_InvestmentIncomeOtherInvestmentExpense	(5,411)tpre_InvestmentIncomeOtherInvestmentExpense
Net investment income on investments managed by Third Point LLC	670tpre_NetInvestmentIncomeLossonInvestmentsManagedbyInvestmentManager	52,527tpre_NetInvestmentIncomeLossonInvestmentsManagedbyInvestmentManager						91,128tpre_NetInvestmentIncomeLossonInvestmentsManagedbyInvestmentManager	165,593tpre_NetInvestmentIncomeLossonInvestmentsManagedbyInvestmentManager	253,704tpre_NetInvestmentIncomeLossonInvestmentsManagedbyInvestmentManager	136,868tpre_NetInvestmentIncomeLossonInvestmentsManagedbyInvestmentManager
Deposit liabilities and reinsurance contracts investment expense	27tpre_DepositLiabilitiesandReinsuranceContractsInvestmentIncomeAllocation	28tpre_DepositLiabilitiesandReinsuranceContractsInvestmentIncomeAllocation						84tpre_DepositLiabilitiesandReinsuranceContractsInvestmentIncomeAllocation	44tpre_DepositLiabilitiesandReinsuranceContractsInvestmentIncomeAllocation	(4,922)tpre_DepositLiabilitiesandReinsuranceContractsInvestmentIncomeAllocation	(446)tpre_DepositLiabilitiesandReinsuranceContractsInvestmentIncomeAllocation
Investment income on cash collateral held by the Catastrophe Reinsurer										86tpre_InvestmentIncomeOther	0tpre_InvestmentIncomeOther
Investment Income, Net Gain (Loss) on Bond	75tpre_InvestmentIncomeNetGainLossonBond	0tpre_InvestmentIncomeNetGainLossonBond						80tpre_InvestmentIncomeNetGainLossonBond	0tpre_InvestmentIncomeNetGainLossonBond
Net gain on reinsurance contract derivatives written by the Catastrophe Reinsurer	780tpre_NetUnrealizedGainonReinsuranceContractDerivatives	2,062tpre_NetUnrealizedGainonReinsuranceContractDerivatives						780tpre_NetUnrealizedGainonReinsuranceContractDerivatives	3,167tpre_NetUnrealizedGainonReinsuranceContractDerivatives	4,335tpre_NetUnrealizedGainonReinsuranceContractDerivatives	0tpre_NetUnrealizedGainonReinsuranceContractDerivatives
Net investment income	1,552tpre_InvestmentIncome	54,617tpre_InvestmentIncome	72,511tpre_InvestmentIncome	47,686tpre_InvestmentIncome	(17,623)tpre_InvestmentIncome	33,848tpre_InvestmentIncome	0tpre_InvestmentIncome	92,072tpre_InvestmentIncome	168,804tpre_InvestmentIncome	253,203tpre_InvestmentIncome	136,422tpre_InvestmentIncome	0tpre_InvestmentIncome
Net investment gains on equity securities
Schedule of Cost-method Investments [Line Items]
Change in net investment income	6,282tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_EquitySecuritiesMember	60,042tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_EquitySecuritiesMember						56,927tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_EquitySecuritiesMember	167,364tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_EquitySecuritiesMember	243,449tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_EquitySecuritiesMember	96,210tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_EquitySecuritiesMember
Net investment gains on debt securities
Schedule of Cost-method Investments [Line Items]
Change in net investment income	(5,435)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DebtSecuritiesMember	14,950tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DebtSecuritiesMember						81,540tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DebtSecuritiesMember	57,549tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DebtSecuritiesMember	69,194tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DebtSecuritiesMember	65,040tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DebtSecuritiesMember
Net investment gains (losses) on other investments
Schedule of Cost-method Investments [Line Items]
Change in net investment income	(25,807)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherInvestmentsMember	(4,595)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherInvestmentsMember						(30,787)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherInvestmentsMember	(1,517)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherInvestmentsMember	(5,045)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherInvestmentsMember	7,386tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherInvestmentsMember
Net investment gains on derivatives
Schedule of Cost-method Investments [Line Items]
Change in net investment income	18,446tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeMember	751tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeMember						10,412tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeMember	19,143tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeMember	29,257tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeMember	5,793tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_DerivativeMember
Net investment gains (losses) on securities sold, not yet purchased
Schedule of Cost-method Investments [Line Items]
Change in net investment income	4,861tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_SecuritiesSoldNotYetPurchasedMember	5,857tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_SecuritiesSoldNotYetPurchasedMember						20,245tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_SecuritiesSoldNotYetPurchasedMember	(16,017)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_SecuritiesSoldNotYetPurchasedMember	(5,974)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_SecuritiesSoldNotYetPurchasedMember	17,076tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_SecuritiesSoldNotYetPurchasedMember
Net investment income (loss) on cash
Schedule of Cost-method Investments [Line Items]
Change in net investment income	15,095tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_CashMember	(2,906)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_CashMember						5,921tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_CashMember	2,243tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_CashMember	17,961tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_CashMember	(1,230)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_CashMember
Net investment gains on securities purchased under and agreement to resell
Schedule of Cost-method Investments [Line Items]
Change in net investment income	(2,381)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_SecuritiesPurchasedUnderanAgreementToSellMember	1,207tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_SecuritiesPurchasedUnderanAgreementToSellMember						(2,592)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_SecuritiesPurchasedUnderanAgreementToSellMember	1,228tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_SecuritiesPurchasedUnderanAgreementToSellMember	1,863tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_SecuritiesPurchasedUnderanAgreementToSellMember	562tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_SecuritiesPurchasedUnderanAgreementToSellMember
Management and performance fees
Schedule of Cost-method Investments [Line Items]
Change in net investment income	(8,440)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_ManagementandPerformanceFeesMember	(19,558)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_ManagementandPerformanceFeesMember						(46,630)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_ManagementandPerformanceFeesMember	(57,750)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_ManagementandPerformanceFeesMember	(87,333)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_ManagementandPerformanceFeesMember	(50,211)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_ManagementandPerformanceFeesMember
Other investment expenses
Schedule of Cost-method Investments [Line Items]
Change in net investment income	(1,069)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherExpenseMember	(1,131)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherExpenseMember						(2,964)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherExpenseMember	(3,439)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherExpenseMember	(5,247)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherExpenseMember	(3,758)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = us-gaap_OtherExpenseMember
Deposit liabilities and reinsurance contracts investment expense
Schedule of Cost-method Investments [Line Items]
Change in net investment income										$ (4,922)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_DepositLiabilitiesandReinsuranceContractsInvestmentExpenseMember	$ (446)tpre_IncreaseDecreaseinInvestmentIncome / us-gaap_FairValueByAssetClassAxis = tpre_DepositLiabilitiesandReinsuranceContractsInvestmentExpenseMember

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 45

-Paragraph 1

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