XML 78 R99.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Segment reporting - Customer Concentration (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended | 12 Months Ended
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Sep. 30, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 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
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written | $ 126,403 us-gaap_AssumedPremiumsWritten | $ 162,277 us-gaap_AssumedPremiumsWritten | $ 45,425 us-gaap_AssumedPremiumsWritten | $ 98,215 us-gaap_AssumedPremiumsWritten | $ 96,020 us-gaap_AssumedPremiumsWritten | $ 27,895 us-gaap_AssumedPremiumsWritten | $ 41,651 us-gaap_AssumedPremiumsWritten | $ 28,178 us-gaap_AssumedPremiumsWritten | $ 92,650 us-gaap_AssumedPremiumsWritten | $ 0 us-gaap_AssumedPremiumsWritten | $ 359,498 us-gaap_AssumedPremiumsWritten | $ 239,660 us-gaap_AssumedPremiumsWritten | $ 401,937 us-gaap_AssumedPremiumsWritten | $ 190,374 us-gaap_AssumedPremiumsWritten | $ 0 us-gaap_AssumedPremiumsWritten
Gross Premiums Written |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written | 126,403 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember |  | 45,425 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember |  |  |  |  |  |  |  | 359,498 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember | 239,660 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember | 401,937 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember | 190,374 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember |
Concentration risk, percentage | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember |  | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember |  |  |  |  |  |  |  | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember |
Gross Premiums Written | Customer Concentration Risk |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | 359,498 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 239,660 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 401,937 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 190,374 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 100.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |
Gross Premiums Written | Customer Concentration Risk | Aon Benfield - a division of Aon plc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | 54,072 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AonBenfieldadivisionofAonplcMember | 91,349 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AonBenfieldadivisionofAonplcMember | 111,865 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AonBenfieldadivisionofAonplcMember | 22,000 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AonBenfieldadivisionofAonplcMember |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 15.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AonBenfieldadivisionofAonplcMember | 38.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AonBenfieldadivisionofAonplcMember | 27.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AonBenfieldadivisionofAonplcMember | 11.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AonBenfieldadivisionofAonplcMember |
Gross Premiums Written | Customer Concentration Risk | Guy Carpenter & Company, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | 91,567 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_GuyCarpenterCompanyLLCMember | (11,927)us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_GuyCarpenterCompanyLLCMember | 89,125 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_GuyCarpenterCompanyLLCMember | 65,073 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_GuyCarpenterCompanyLLCMember |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 25.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_GuyCarpenterCompanyLLCMember | (5.00%)us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_GuyCarpenterCompanyLLCMember | 22.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_GuyCarpenterCompanyLLCMember | 34.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_GuyCarpenterCompanyLLCMember |
Gross Premiums Written | Customer Concentration Risk | Willis Re |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | 55,589 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_WillisReMember | 13,421 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_WillisReMember |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 15.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_WillisReMember | 5.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_WillisReMember |  |  |
Gross Premiums Written | Customer Concentration Risk | Advocate Reinsurance Partners, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | 51,002 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AdvocateReinsurancePartnersLLCMember | 26,000 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AdvocateReinsurancePartnersLLCMember | 57,994 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AdvocateReinsurancePartnersLLCMember | 22,473 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AdvocateReinsurancePartnersLLCMember |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 14.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AdvocateReinsurancePartnersLLCMember | 10.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AdvocateReinsurancePartnersLLCMember | 14.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AdvocateReinsurancePartnersLLCMember | 11.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_AdvocateReinsurancePartnersLLCMember |
Gross Premiums Written | Customer Concentration Risk | Stonehill Reinsurance Partners, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | 44,744 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_StonehillReinsurancePartnersLLCMember | 0 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_StonehillReinsurancePartnersLLCMember |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 12.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_StonehillReinsurancePartnersLLCMember | 0.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_StonehillReinsurancePartnersLLCMember |  |  |
Gross Premiums Written | Customer Concentration Risk | TigerRisk Partners LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | 13,852 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TigerRiskPartnersLLCMember | 10,472 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TigerRiskPartnersLLCMember |  |  |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 3.90%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TigerRiskPartnersLLCMember | 4.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TigerRiskPartnersLLCMember |  |  |
Gross Premiums Written | Customer Concentration Risk | BMS Intermediaries |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_BMSIntermediariesMember | 46,095 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_BMSIntermediariesMember | 46,095 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_BMSIntermediariesMember | 5,269 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_BMSIntermediariesMember |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 0.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_BMSIntermediariesMember | 19.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_BMSIntermediariesMember | 11.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_BMSIntermediariesMember | 2.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_BMSIntermediariesMember |
Gross Premiums Written | Customer Concentration Risk | Other brokers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | 3,203 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherBrokersMember | 7,545 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherBrokersMember | 40,246 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherBrokersMember | 33,059 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherBrokersMember |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 0.90%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherBrokersMember | 3.10%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherBrokersMember | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherBrokersMember | 17.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherBrokersMember |
Gross Premiums Written | Customer Concentration Risk | Total broker placed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | 314,029 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TotalBrokerPlacedMember | 182,955 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TotalBrokerPlacedMember | 345,325 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TotalBrokerPlacedMember | 147,874 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TotalBrokerPlacedMember |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 87.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TotalBrokerPlacedMember | 76.30%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TotalBrokerPlacedMember | 85.90%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TotalBrokerPlacedMember | 77.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_TotalBrokerPlacedMember |
Gross Premiums Written | Customer Concentration Risk | Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross premiums written |  |  |  |  |  |  |  |  |  |  | $ 45,469 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherCustomerMember | $ 56,705 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherCustomerMember | $ 56,612 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherCustomerMember | $ 42,500 us-gaap_AssumedPremiumsWritten / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherCustomerMember |
Concentration risk, percentage |  |  |  |  |  |  |  |  |  |  | 12.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherCustomerMember | 23.70%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherCustomerMember | 14.10%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherCustomerMember | 22.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = tpre_OtherCustomerMember |

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