$SPNT
SiriusPoint Ltd Stock $spnt

$spnt Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 8-K Financial Statement

#000157601821000153 Filed on June 17, 2021

Income Statement

Concept	2020 Q4	2020 Q3	2020 Q2
Revenue	$386.8M	$263.7M	$278.0M
YoY Change	48.77%	31.78%	29.55%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$16.50M	$21.30M	$13.50M
YoY Change	29.92%	131.52%	-31.47%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$39.32M	$54.82M	$43.67M
YoY Change	-36.43%	-53.65%	-24.71%
% of Gross Profit
Operating Expenses	$237.9M	$186.3M	$149.4M
YoY Change	8.83%	-14.66%	-8.79%
Operating Profit
YoY Change
Interest Expense	$2.068M	$2.100M	$2.000M
YoY Change	-0.29%	1.25%	-2.49%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$138.5M	$69.40M	$127.3M
YoY Change	377.21%	-553.24%	140.23%
Income Tax	$3.728M	$700.0K	$3.300M
% Of Pretax Income	2.69%	1.01%	2.59%
Net Earnings	$134.4M	$68.70M	$124.0M
YoY Change	351.93%	-555.0%	133.68%
Net Earnings / Revenue	34.74%	26.05%	44.6%
Basic Earnings Per Share	$1.43	$0.74	$1.33
Diluted Earnings Per Share	$1.43	$0.73	$1.33
COMMON SHARES
Basic Shares Outstanding	92.64M shares	92.61M shares	92.59M shares
Diluted Shares Outstanding	93.17M shares	92.97M shares	92.74M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2020 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$526.0M	$513.8M	$584.8M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment
YoY Change
Goodwill
YoY Change
Intangibles	$0.00
YoY Change
Long-Term Investments	$1.161B	$1.059B	$1.001B
YoY Change	17.27%	1.63%	-28.24%
Other Assets	$1.188B	$1.102B	$887.0M
YoY Change	17.04%	34.88%	35.21%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$3.535B	$3.534B	$3.494B
YoY Change	8.92%	2.78%	0.12%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$18.00M	$14.00M	$12.00M
YoY Change	0.0%	-6.67%	-20.0%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$18.00M	$15.00M	$17.00M
YoY Change	-14.29%	-6.25%	-5.56%
LONG-TERM LIABILITIES
Long-Term Debt	$114.0M	$114.0M	$114.0M
YoY Change	0.0%	0.0%	0.0%
Other Long-Term Liabilities	$165.0M	$171.0M	$189.0M
YoY Change	-4.07%	-1.72%	26.85%
Total Long-Term Liabilities	$279.0M	$285.0M	$303.0M
YoY Change	-2.45%	-1.04%	15.21%
TOTAL LIABILITIES
Total Short-Term Liabilities	$18.00M	$15.00M	$17.00M
Total Long-Term Liabilities	$279.0M	$285.0M	$303.0M
Total Liabilities	$1.970B	$2.106B	$2.136B
YoY Change	7.55%	2.47%	2.04%
SHAREHOLDERS EQUITY
Retained Earnings	$620.4M	$486.1M	$417.3M
YoY Change	30.08%	8.69%	-9.73%
Common Stock	$9.600M	$9.531M	$9.492M
YoY Change	1.88%	1.16%	0.99%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.564B	$1.428B	$1.357B
YoY Change
Total Liabilities & Shareholders Equity	$3.535B	$3.534B	$3.494B
YoY Change	8.92%	2.78%	0.12%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2020 Q2
OPERATING ACTIVITIES
Net Income	$134.4M	$68.70M	$124.0M
YoY Change	351.93%	-555.0%	133.68%
Depreciation, Depletion And Amortization	$39.32M	$54.82M	$43.67M
YoY Change	-36.43%	-53.65%	-24.71%
Cash From Operating Activities	$28.10M	$14.90M	$33.60M
YoY Change	-36.71%	-1454.55%	-55.08%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	$74.20M	$138.7M	$20.00M
YoY Change	-22.79%	-81.43%	194.12%
Cash From Investing Activities	$74.20M	$138.7M	$20.00M
YoY Change	-22.79%	-81.43%	194.12%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-3.800M	-10.20M	-2.400M
YoY Change	-195.0%	-173.91%	-17.24%
NET CHANGE
Cash From Operating Activities	28.10M	14.90M	33.60M
Cash From Investing Activities	74.20M	138.7M	20.00M
Cash From Financing Activities	-3.800M	-10.20M	-2.400M
Net Change In Cash	98.50M	143.4M	51.20M
YoY Change	-31.83%	-81.12%	-34.94%
FREE CASH FLOW
Cash From Operating Activities	$28.10M	$14.90M	$33.60M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021Q2	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2021Q2	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2021Q2	dei	Document Type DocumentType	8-K
CY2021Q2	dei	Document Period End Date DocumentPeriodEndDate	2021-06-17
CY2021Q2	dei	Entity Registrant Name EntityRegistrantName	SIRIUSPOINT LTD.
CY2021Q2	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	D0
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CY2021Q2	dei	Security12b Title Security12bTitle	Common Shares, $0.10 par value
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CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.27
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	92510090	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91835990	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	97054315	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92957799	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92652316	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	97054315	shares
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1563925000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1414074000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1204574000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1565286000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1414074000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1204574000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	143858000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	200619000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	-317469000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	6636000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	7061000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	4956000	USD
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities InterestExpenseDomesticDepositLiabilities	852000	USD
CY2019	us-gaap	Interest Expense Domestic Deposit Liabilities InterestExpenseDomesticDepositLiabilities	5879000	USD
CY2018	us-gaap	Interest Expense Domestic Deposit Liabilities InterestExpenseDomesticDepositLiabilities	-1273000	USD
CY2020	us-gaap	Net Realized Or Unrealized Gain Loss On Trading Securities NetRealizedOrUnrealizedGainLossOnTradingSecurities	62498000	USD
CY2019	us-gaap	Net Realized Or Unrealized Gain Loss On Trading Securities NetRealizedOrUnrealizedGainLossOnTradingSecurities	2522000	USD
CY2018	us-gaap	Net Realized Or Unrealized Gain Loss On Trading Securities NetRealizedOrUnrealizedGainLossOnTradingSecurities	34145000	USD
CY2020	spnt	Net Realizedand Unrealized Gain Losson Trading Securitiesrelatedpartyinvestmentfund NetRealizedandUnrealizedGainLossonTradingSecuritiesrelatedpartyinvestmentfund	194988000	USD
CY2019	spnt	Net Realizedand Unrealized Gain Losson Trading Securitiesrelatedpartyinvestmentfund NetRealizedandUnrealizedGainLossonTradingSecuritiesrelatedpartyinvestmentfund	249626000	USD
CY2018	spnt	Net Realizedand Unrealized Gain Losson Trading Securitiesrelatedpartyinvestmentfund NetRealizedandUnrealizedGainLossonTradingSecuritiesrelatedpartyinvestmentfund	-280847000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-5219000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-3635000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	7503000	USD
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	3831000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	1382000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4134000	USD
CY2020	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-38610000	USD
CY2019	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-20355000	USD
CY2018	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	157214000	USD
CY2020	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-23614000	USD
CY2019	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-24782000	USD
CY2018	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-8746000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	17341000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	1504000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	777000	USD
CY2020	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	8855000	USD
CY2019	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	3489000	USD
CY2018	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	918000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3267000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	172000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	13486000	USD
CY2020	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	-1292000	USD
CY2019	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	862000	USD
CY2018	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	2716000	USD
CY2020	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-51315000	USD
CY2019	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-41600000	USD
CY2018	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	25353000	USD
CY2020	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	190325000	USD
CY2019	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	157849000	USD
CY2018	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	225670000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-3269000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	10555000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-24684000	USD
CY2020	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	1780000	USD
CY2019	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	11534000	USD
CY2018	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	23866000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	73356000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	141112000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	13387000	USD
CY2020	spnt	Proceedsfrom Trading Securities Heldfor Investment Related Party Investment Fund ProceedsfromTradingSecuritiesHeldforInvestmentRelatedPartyInvestmentFund	0	USD
CY2019	spnt	Proceedsfrom Trading Securities Heldfor Investment Related Party Investment Fund ProceedsfromTradingSecuritiesHeldforInvestmentRelatedPartyInvestmentFund	760000000	USD
CY2018	spnt	Proceedsfrom Trading Securities Heldfor Investment Related Party Investment Fund ProceedsfromTradingSecuritiesHeldforInvestmentRelatedPartyInvestmentFund	142968000	USD
CY2020	spnt	Paymentsto Acquire Trading Securities Heldfor Investment Related Party Investment Fund PaymentstoAcquireTradingSecuritiesHeldforInvestmentRelatedPartyInvestmentFund	0	USD
CY2019	spnt	Paymentsto Acquire Trading Securities Heldfor Investment Related Party Investment Fund PaymentstoAcquireTradingSecuritiesHeldforInvestmentRelatedPartyInvestmentFund	87000000	USD
CY2018	spnt	Paymentsto Acquire Trading Securities Heldfor Investment Related Party Investment Fund PaymentstoAcquireTradingSecuritiesHeldforInvestmentRelatedPartyInvestmentFund	136626000	USD
CY2020	spnt	Increasedecreasein Participation Agreementwith Related Party Investment Fund IncreasedecreaseinParticipationAgreementwithRelatedPartyInvestmentFund	0	USD
CY2019	spnt	Increasedecreasein Participation Agreementwith Related Party Investment Fund IncreasedecreaseinParticipationAgreementwithRelatedPartyInvestmentFund	-2297000	USD
CY2018	spnt	Increasedecreasein Participation Agreementwith Related Party Investment Fund IncreasedecreaseinParticipationAgreementwithRelatedPartyInvestmentFund	-20852000	USD
CY2020	us-gaap	Payments To Acquire Trading Securities Heldforinvestment PaymentsToAcquireTradingSecuritiesHeldforinvestment	444111000	USD
CY2019	us-gaap	Payments To Acquire Trading Securities Heldforinvestment PaymentsToAcquireTradingSecuritiesHeldforinvestment	331463000	USD
CY2018	us-gaap	Payments To Acquire Trading Securities Heldforinvestment PaymentsToAcquireTradingSecuritiesHeldforinvestment	3483319000	USD
CY2020	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	532247000	USD
CY2019	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	446206000	USD
CY2018	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	3475515000	USD
CY2020	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	2846000	USD
CY2019	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	0	USD
CY2018	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	853798000	USD
CY2020	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	15721000	USD
CY2019	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	0	USD
CY2018	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	800508000	USD
CY2020	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-94902000	USD
CY2019	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	1411000	USD
CY2018	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	482778000	USD
CY2020	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	0	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	8051000	USD
CY2019	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	0	USD
CY2018	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-29618000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	6109000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	786857000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	377556000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1888000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	302000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	68000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	74000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	138705000	USD
CY2020	spnt	Increase Decreasein Deposit Contracts Liabilities IncreaseDecreaseinDepositContractsLiabilities	-20202000	USD
CY2019	spnt	Increase Decreasein Deposit Contracts Liabilities IncreaseDecreaseinDepositContractsLiabilities	10832000	USD
CY2018	spnt	Increase Decreasein Deposit Contracts Liabilities IncreaseDecreaseinDepositContractsLiabilities	9790000	USD
CY2020	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	1020000	USD
CY2019	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	USD
CY2018	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-97950000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-19484000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	12652000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-226939000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	59981000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	940621000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	164004000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1653958000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	713337000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	549333000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1713939000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1653958000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	713337000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	8340000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	25578000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	53000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	10000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	7274000	USD
CY2020	spnt	Noncash Transferof Investment Assetto Related Party Investments Fund NoncashTransferofInvestmentAssettoRelatedPartyInvestmentsFund	0	USD
CY2019	spnt	Noncash Transferof Investment Assetto Related Party Investments Fund NoncashTransferofInvestmentAssettoRelatedPartyInvestmentsFund	0	USD
CY2018	spnt	Noncash Transferof Investment Assetto Related Party Investments Fund NoncashTransferofInvestmentAssettoRelatedPartyInvestmentsFund	1571191000	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of estimates </span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported and disclosed amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The major estimates reflected in the Company’s consolidated financial statements include, but are not limited to, the loss and loss adjustment expense reserves, estimates of written and earned premiums and fair value of financial instruments.</span></div>
CY2020Q4	spnt	Premium Deficiency Loss PremiumDeficiencyLoss	0	USD
CY2020	us-gaap	Derivatives Methods Of Accounting Nonhedging Derivatives DerivativesMethodsOfAccountingNonhedgingDerivatives	<div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Derivatives</span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Investments</span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Prior to the change in the investment account structure, derivative instruments within our investment assets managed by our investment manager, Third Point LLC, were recorded in the consolidated balance sheets at fair value, with changes in fair values and realized gains and losses recognized in net investment income in the consolidated statements of income (loss). </span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Derivatives served as a key component of the Company’s investment strategy and were utilized primarily to structure the portfolio, or individual investments, and to economically match the investment objectives of the Company. </span><span style="color:#221e1f;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company’s derivatives did not qualify as hedges for financial reporting purposes and were recorded in the consolidated balance sheets on a gross basis and not offset against any collateral pledged or received. Pursuant to the International Swaps and Derivatives Association (“ISDA”) master agreements, securities lending agreements and other derivatives agreements, the Company and its counterparties typically have the ability to net certain payments owed to each other in specified circumstances. In addition, in the event a party to one of the ISDA master agreements, securities lending agreements or other derivatives agreements defaults, or a transaction is otherwise subject to termination, the non-defaulting party generally has the right to set off against payments owed to the defaulting party or collateral held by the non-defaulting party.</span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company entered into derivative contracts to manage credit risk, interest rate risk, currency exchange risk and other exposure risks. The Company used derivatives in connection with its risk-management activities to economically hedge certain risks and to gain exposure to certain investments. The utilization of derivative contracts also allowed for an efficient means by which to trade certain asset classes. </span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Fair values of derivatives were determined by using quoted market prices, industry recognized pricing vendors and counterparty quotes when available; otherwise fair values were based on pricing models that consider the time value of money, volatility and the current market and contractual prices of underlying financial instruments.</span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Embedded derivatives</span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain of the Company’s reinsurance contracts contain interest crediting features that vary based on the net investment return on investments managed by Third Point LLC. These contractual features are considered embedded derivatives in accordance with U.S. GAAP. We include the estimated fair value of these embedded derivatives in the consolidated balance sheets with the host contract in order to reflect the expected settlement of these features with the host contract. The change in estimated fair value of these embedded derivatives are recorded in other expenses in the consolidated statements of income (loss). </span></div><div style="margin-top:9pt;text-align:justify"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Other derivatives</span></div><div style="margin-top:9pt;text-align:justify"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">From time to time the Company may also enter into reinsurance contracts that meet the definition of a derivative contract. The Company measures these derivative instruments at fair value and recognizes these instruments as </span></div>either assets or liabilities in the consolidated balance sheets. Subsequent changes in estimated fair value of these derivatives are recorded in other expenses in the consolidated statements of income (loss).
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2020Q4	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	441935000	USD
CY2020Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	68550000	USD
CY2020Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	20464000	USD
CY2020Q4	us-gaap	Assets Assets	3535188000	USD
CY2020Q4	us-gaap	Reinsurance Payable ReinsurancePayable	78115000	USD
CY2020Q4	us-gaap	Unearned Premiums UnearnedPremiums	284835000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	1969902000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1563925000	USD
CY2019Q4	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	478452000	USD
CY2019	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-24782000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	1504000	USD
CY2019	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-41600000	USD
CY2019Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	92164000	USD
CY2019Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	3123000	USD
CY2019Q4	us-gaap	Assets Assets	3245651000	USD
CY2019Q4	us-gaap	Reinsurance Payable ReinsurancePayable	76516000	USD
CY2019Q4	us-gaap	Unearned Premiums UnearnedPremiums	336150000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	1831577000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1414074000	USD
CY2020	us-gaap	Premiums Written Gross PremiumsWrittenGross	588540000	USD
CY2020	us-gaap	Ceded Premiums Written CededPremiumsWritten	46344000	USD
CY2020	us-gaap	Premiums Written Net PremiumsWrittenNet	542196000	USD
CY2020	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	68656000	USD
CY2020	us-gaap	Premiums Earned Net PremiumsEarnedNet	610852000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	143517000	USD
CY2019	us-gaap	Premiums Written Gross PremiumsWrittenGross	668414000	USD
CY2019	us-gaap	Ceded Premiums Written CededPremiumsWritten	11376000	USD
CY2019	us-gaap	Premiums Written Net PremiumsWrittenNet	657038000	USD
CY2020Q4	spnt	Cashcashequivalentsrestrictedcashrestrictedcashequivalentsandrestrictedinvestments Cashcashequivalentsrestrictedcashrestrictedcashequivalentsandrestrictedinvestments	1800306000	USD
CY2019Q4	spnt	Cashcashequivalentsrestrictedcashrestrictedcashequivalentsandrestrictedinvestments Cashcashequivalentsrestrictedcashrestrictedcashequivalentsandrestrictedinvestments	1796575000	USD
CY2019	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	43104000	USD
CY2019	us-gaap	Premiums Earned Net PremiumsEarnedNet	700142000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	200619000	USD
CY2018	us-gaap	Premiums Written Gross PremiumsWrittenGross	650187000	USD
CY2018	us-gaap	Ceded Premiums Written CededPremiumsWritten	4169000	USD
CY2018	us-gaap	Premiums Written Net PremiumsWrittenNet	646018000	USD
CY2018	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-24576000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	621442000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-317692000	USD
CY2020	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-38610000	USD
CY2020	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-23614000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	17341000	USD
CY2020	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-51315000	USD
CY2020	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	1780000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	73356000	USD
CY2019	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-20355000	USD
CY2019	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	11534000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	141112000	USD
CY2018	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	157214000	USD
CY2018	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-8746000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	777000	USD
CY2018	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	25353000	USD
CY2018	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	23866000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	13387000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	525991000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	639415000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1713939000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1653958000	USD
CY2020Q4	us-gaap	Restricted Investments RestrictedInvestments	86367000	USD
CY2019Q4	us-gaap	Restricted Investments RestrictedInvestments	142617000	USD
CY2020Q4	spnt	Assetsunder Management Carrying Amount Assets AssetsunderManagementCarryingAmountAssets	2891650000	USD
CY2019Q4	spnt	Assetsunder Management Carrying Amount Assets AssetsunderManagementCarryingAmountAssets	2590636000	USD
CY2020Q4	spnt	Assetsunder Management Carrying Amount Liabilitiesand Noncontrolling Interest AssetsunderManagementCarryingAmountLiabilitiesandNoncontrollingInterest	13182000	USD
CY2019Q4	spnt	Assetsunder Management Carrying Amount Liabilitiesand Noncontrolling Interest AssetsunderManagementCarryingAmountLiabilitiesandNoncontrollingInterest	509000	USD
CY2020Q4	us-gaap	Assets Under Management Carrying Amount AssetsUnderManagementCarryingAmount	2878468000	USD
CY2019Q4	us-gaap	Assets Under Management Carrying Amount AssetsUnderManagementCarryingAmount	2590127000	USD
CY2020Q4	us-gaap	Financial Instruments Owned Corporate Equities At Fair Value FinancialInstrumentsOwnedCorporateEquitiesAtFairValue	1000000	USD
CY2020Q4	spnt	Financial Instruments Owned Private Securitiesat Fair Value FinancialInstrumentsOwnedPrivateSecuritiesatFairValue	3000000	USD
CY2020Q4	us-gaap	Trading Securities Equity TradingSecuritiesEquity	4000000	USD
CY2020Q4	us-gaap	Financial Instruments Owned Mortgages Mortgage Backed And Asset Backed Securities At Fair Value FinancialInstrumentsOwnedMortgagesMortgageBackedAndAssetBackedSecuritiesAtFairValue	9929000	USD
CY2020Q4	spnt	Financial Instruments Owned Bank Debtsat Fair Value FinancialInstrumentsOwnedBankDebtsatFairValue	423000	USD
CY2020Q4	us-gaap	Financial Instruments Owned Corporate Debt At Fair Value FinancialInstrumentsOwnedCorporateDebtAtFairValue	37746000	USD
CY2020Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	53213000	USD
CY2020Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	101311000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	1153000	USD
CY2020Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	106464000	USD
CY2020Q4	us-gaap	Alternative Investment AlternativeInvestment	1055618000	USD
CY2020Q4	spnt	Assets Including Alternative Investments Fair Value Disclosure AssetsIncludingAlternativeInvestmentsFairValueDisclosure	1162082000	USD
CY2020Q4	us-gaap	Financial Instruments Sold Not Yet Purchased Us Government And Agency Obligations FinancialInstrumentsSoldNotYetPurchasedUSGovernmentAndAgencyObligations	11990000	USD
CY2020Q4	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	11990000	USD
CY2020Q4	us-gaap	Embedded Derivative Fair Value Of Embedded Derivative Liability EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability	1013000	USD
CY2020Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	13003000	USD
CY2019Q4	us-gaap	Financial Instruments Owned Corporate Equities At Fair Value FinancialInstrumentsOwnedCorporateEquitiesAtFairValue	1000000	USD
CY2019Q4	spnt	Financial Instruments Owned Principal Investments Preferred Equityat Fair Value FinancialInstrumentsOwnedPrincipalInvestmentsPreferredEquityatFairValue	3000000	USD
CY2019Q4	us-gaap	Trading Securities Equity TradingSecuritiesEquity	4000000	USD
CY2019Q4	us-gaap	Financial Instruments Owned Us Government And Agency Obligations At Fair Value FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue	101186000	USD
CY2019Q4	us-gaap	Financial Instruments Owned Other Sovereign Government Obligations At Fair Value FinancialInstrumentsOwnedOtherSovereignGovernmentObligationsAtFairValue	23885000	USD
CY2019Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	125071000	USD
CY2019Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	129071000	USD
CY2019Q4	us-gaap	Alternative Investment AlternativeInvestment	860630000	USD
CY2019Q4	spnt	Assets Including Alternative Investments Fair Value Disclosure AssetsIncludingAlternativeInvestmentsFairValueDisclosure	989701000	USD
CY2019Q4	us-gaap	Embedded Derivative Fair Value Of Embedded Derivative Liability EmbeddedDerivativeFairValueOfEmbeddedDerivativeLiability	31000	USD
CY2019Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	31000	USD
CY2019Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	4000000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	1153000	USD
CY2020Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	5153000	USD
CY2019Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	31000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	0	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales	1004000	USD
CY2020	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	22000	USD
CY2020Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	1013000	USD
CY2018Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	0	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet	0	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	4000000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	0	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	0	USD
CY2019Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	4000000	USD
CY2018Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	22000	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Transfers Net FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet	0	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	0	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales	0	USD
CY2019	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	-9000	USD
CY2019Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	31000	USD
CY2020	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	1200000	USD
CY2019	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	USD
CY2018	us-gaap	Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	USD
CY2020	us-gaap	Due To And From Broker Dealers And Clearing Organizations Disclosure DueToAndFromBrokerDealersAndClearingOrganizationsDisclosure	<div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">7. Due from brokers </span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">During the year ended December 31, 2020, the Company expanded its fixed income portfolio by investing in structured credit and corporate credit securities such as corporate bonds and bank debt. The Company has also hedged part of the interest rate risk underlying these securities by purchasing short positions in long duration U.S. Treasuries.</span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company holds substantially all of its fixed income investments through prime brokers pursuant to agreements between the Company and each prime broker. The brokerage arrangements differ from broker to broker, but generally cash and investments in securities are available as collateral against investments in securities sold, not yet purchased, if required. </span></div><div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of December 31, 2020, the Company’s due from brokers were comprised of the following:</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:100.000%"><tr><td style="width:1.0%"/><td style="width:82.233%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:15.567%"/><td style="width:0.1%"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2020</span></td><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:700;line-height:100%">Due from brokers</span></td><td colspan="3" style="background-color:#ffffff;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Cash held at brokers</span></td><td style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">94,902 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">94,902 </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr><tr><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/><td colspan="3" style="display:none"/></tr></table></div><div style="margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Margin debt balances were collateralized by cash held by the broker and certain of the Company’s securities. Margin interest was paid either at the daily broker call rate or based on London Inter-bank Offered Rate. Amounts are borrowed through committed facilities with terms of up to 90 days, secured by assets of the Company held by the prime broker, and incur interest based on the Company’s negotiated rates. This interest expense is reflected in other net investment income (loss) in the consolidated statements of income (loss).</span></div>
CY2020Q4	us-gaap	Deposits Paid For Securities Borrowed At Carrying Value DepositsPaidForSecuritiesBorrowedAtCarryingValue	94902000	USD
CY2020Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	94902000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1153000	USD
CY2020Q4	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	4150000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	0	USD
CY2019Q4	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	0	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	1013000	USD
CY2020Q4	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	35704000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	31000	USD
CY2019Q4	us-gaap	Derivative Liability Notional Amount DerivativeLiabilityNotionalAmount	20000000	USD
CY2020	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	0	USD
CY2020	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	0	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	28035000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-27391000	USD
CY2020Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Reported Claims Amount LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount	265619000	USD
CY2019Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Reported Claims Amount LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount	148166000	USD
CY2020Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred But Not Reported Ibnr Claims Amount LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount	1043458000	USD
CY2019Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred But Not Reported Ibnr Claims Amount LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount	963359000	USD
CY2020Q4	spnt	Deferredgainonretroactivereinsurancecontracts Deferredgainonretroactivereinsurancecontracts	991000	USD
CY2019Q4	spnt	Deferredgainonretroactivereinsurancecontracts Deferredgainonretroactivereinsurancecontracts	167000	USD
CY2020Q4	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	1310068000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	1111692000	USD
CY2020	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div style="margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The following table represents the activity in the loss and loss adjustment expense reserves for the years ended December 31, 2020, 2019 and 2018:</span></div><div style="margin-bottom:9pt;margin-top:5pt;text-align:center"><table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:100.000%"><tr><td style="width:1.0%"/><td style="width:61.239%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:10.919%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:10.919%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.601%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:10.921%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2020</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2019</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2018</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Gross reserves for loss and loss adjustment expenses, beginning of year</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1,111,692 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">937,157 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">720,570 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Less: loss and loss adjustment expenses recoverable, beginning of year</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(5,520)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(2,031)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(1,113)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Less: deferred charges on retroactive reinsurance contracts</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(6,738)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(3,847)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">— </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Net reserves for loss and loss adjustment expenses, beginning of year</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1,099,434 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">931,279 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">719,457 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Increase (decrease) in net loss and loss adjustment expenses incurred in respect of losses occurring in:</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> Current year</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">431,506 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">489,994 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">434,276 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> Prior years </span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">33,792 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(86,495)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">4,138 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Total incurred loss and loss adjustment expenses</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">465,298 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">403,499 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">438,414 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Net loss and loss adjustment expenses paid in respect of losses occurring in:</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> Current year</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(73,550)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(63,638)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(85,173)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> Prior years</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(209,534)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(188,392)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(132,336)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Total net paid losses</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(283,084)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(252,030)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(217,509)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Foreign currency translation</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">8,051 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">16,686 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(9,083)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Net reserves for loss and loss adjustment expenses, end of year</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1,289,699 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1,099,434 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">931,279 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Plus: loss and loss adjustment expenses recoverable, end of year</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">14,375 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">5,520 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">2,031 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Plus: deferred charges on retroactive reinsurance contracts</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">5,994 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">6,738 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">3,847 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Gross reserves for loss and loss adjustment expenses, end of year</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1,310,068 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1,111,692 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#cceeff;padding:0 1pt"/><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:9pt;font-weight:400;line-height:100%">937,157 </span></td><td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div>
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1111692000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	937157000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	720570000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	5520000	USD
CY2018Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	2031000	USD
CY2017Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	1113000	USD
CY2019Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	6738000	USD
CY2018Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	3847000	USD
CY2017Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	0	USD
CY2019Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1099434000	USD
CY2018Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	931279000	USD
CY2017Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	719457000	USD
CY2020	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	431506000	USD
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	489994000	USD
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	434276000	USD
CY2020Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1289699000	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss	-16686000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss	9083000	USD
CY2020	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	33792000	USD
CY2019	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-86495000	USD
CY2018	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	4138000	USD
CY2020	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	465298000	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	403499000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	438414000	USD
CY2020	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	73550000	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	63638000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	85173000	USD
CY2020	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	209534000	USD
CY2019	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	188392000	USD
CY2018	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	132336000	USD
CY2020	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	283084000	USD
CY2019	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	252030000	USD
CY2018	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	217509000	USD
CY2020	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss	-8051000	USD
CY2019Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1099434000	USD
CY2018Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	931279000	USD
CY2020Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	14375000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	5520000	USD
CY2018Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	2031000	USD
CY2020Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	5994000	USD
CY2019Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	6738000	USD
CY2018Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	3847000	USD
CY2020Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1310068000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1111692000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	937157000	USD
CY2020	spnt	Prior Year Claimsand Claims Adjustment Expense Including Amortizationof Deferred Gains PriorYearClaimsandClaimsAdjustmentExpenseIncludingAmortizationofDeferredGains	33800000	USD
CY2020Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	6000000.0	USD
CY2019Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	6700000	USD
CY2019	spnt	Prior Year Claimsand Claims Adjustment Expense Including Amortizationof Deferred Gains PriorYearClaimsandClaimsAdjustmentExpenseIncludingAmortizationofDeferredGains	-86500000	USD
CY2018	spnt	Prior Year Claimsand Claims Adjustment Expense Including Amortizationof Deferred Gains PriorYearClaimsandClaimsAdjustmentExpenseIncludingAmortizationofDeferredGains	-4100000	USD
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2020Q4	us-gaap	Shortduration Insurance Contracts Liability For Unpaid Claims And Allocated Claim Adjustment Expense Net ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet	1289699000	USD
CY2020Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	14375000	USD
CY2020Q4	us-gaap	Deferred Costs Current And Noncurrent DeferredCostsCurrentAndNoncurrent	5994000	USD
CY2020Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1310068000	USD
CY2020	us-gaap	Ceded Premiums Written CededPremiumsWritten	46300000	USD
CY2019	us-gaap	Ceded Premiums Written CededPremiumsWritten	11400000	USD
CY2018	us-gaap	Ceded Premiums Written CededPremiumsWritten	4200000	USD
CY2020Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	14400000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	5500000	USD
CY2020	spnt	Affiliatecostsgrossof T Pfundfees AffiliatecostsgrossofTPfundfees	79800000	USD
CY2019	spnt	Affiliatecostsgrossof T Pfundfees AffiliatecostsgrossofTPfundfees	19556000	USD
CY2018	spnt	Affiliatecostsgrossof T Pfundfees AffiliatecostsgrossofTPfundfees	37221000	USD
CY2019Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	172259000	USD
CY2018Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	145342000	USD
CY2017Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	129133000	USD
CY2020	spnt	Deposit Contracts Liabilities Agreement Consideration DepositContractsLiabilitiesAgreementConsideration	550000	USD
CY2019	spnt	Deposit Contracts Liabilities Agreement Consideration DepositContractsLiabilitiesAgreementConsideration	23884000	USD
CY2018	spnt	Deposit Contracts Liabilities Agreement Consideration DepositContractsLiabilitiesAgreementConsideration	17879000	USD
CY2020	spnt	Deposit Contracts Liabilities Agreement Consideration Receivable DepositContractsLiabilitiesAgreementConsiderationReceivable	0	USD
CY2019	spnt	Deposit Contracts Liabilities Agreement Consideration Receivable DepositContractsLiabilitiesAgreementConsiderationReceivable	10164000	USD
CY2018	spnt	Deposit Contracts Liabilities Agreement Consideration Receivable DepositContractsLiabilitiesAgreementConsiderationReceivable	7390000	USD
CY2020	spnt	Deposit Contracts Liabilities Net Investment Income Allocation Accrued DepositContractsLiabilitiesNetInvestmentIncomeAllocationAccrued	852000	USD
CY2019	spnt	Deposit Contracts Liabilities Net Investment Income Allocation Accrued DepositContractsLiabilitiesNetInvestmentIncomeAllocationAccrued	5879000	USD
CY2018	spnt	Deposit Contracts Liabilities Net Investment Income Allocation Accrued DepositContractsLiabilitiesNetInvestmentIncomeAllocationAccrued	-1273000	USD
CY2020	spnt	Deposit Contracts Liabilities Payments DepositContractsLiabilitiesPayments	20752000	USD
CY2019	spnt	Deposit Contracts Liabilities Payments DepositContractsLiabilitiesPayments	13052000	USD
CY2018	spnt	Deposit Contracts Liabilities Payments DepositContractsLiabilitiesPayments	8089000	USD
CY2020	spnt	Deposit Contracts Liabilities Translation Adjustment DepositContractsLiabilitiesTranslationAdjustment	52000	USD
CY2019	spnt	Deposit Contracts Liabilities Translation Adjustment DepositContractsLiabilitiesTranslationAdjustment	42000	USD
CY2018	spnt	Deposit Contracts Liabilities Translation Adjustment DepositContractsLiabilitiesTranslationAdjustment	302000	USD
CY2020Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	152961000	USD
CY2019Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	172259000	USD
CY2018Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	145342000	USD
CY2020Q4	us-gaap	Line Of Credit Facility Fair Value Of Amount Outstanding LineOfCreditFacilityFairValueOfAmountOutstanding	303387000	USD
CY2020Q4	spnt	Restrictedcashsecuringcreditfacilitiesandreinsurancecontracts Restrictedcashsecuringcreditfacilitiesandreinsurancecontracts	306032000	USD
CY2020	spnt	Net Realized Gains Losseson Investment And Derivatives NetRealizedGainsLossesonInvestmentAndDerivatives	46369000	USD
CY2019	spnt	Net Realized Gains Losseson Investment And Derivatives NetRealizedGainsLossesonInvestmentAndDerivatives	-5850000	USD
CY2018	spnt	Net Realized Gains Losseson Investment And Derivatives NetRealizedGainsLossesonInvestmentAndDerivatives	446646000	USD
CY2020	spnt	Changein Net Unrealized Gains Losseson Investmentsand Investment Derivatives ChangeinNetUnrealizedGainsLossesonInvestmentsandInvestmentDerivatives	14881000	USD
CY2019	spnt	Changein Net Unrealized Gains Losseson Investmentsand Investment Derivatives ChangeinNetUnrealizedGainsLossesonInvestmentsandInvestmentDerivatives	8381000	USD
CY2018	spnt	Changein Net Unrealized Gains Losseson Investmentsand Investment Derivatives ChangeinNetUnrealizedGainsLossesonInvestmentsandInvestmentDerivatives	-412650000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	7998000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	12806000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-7305000	USD
CY2020	spnt	Dividendand Interest Income Netof Withholding Taxes DividendandInterestIncomeNetofWithholdingTaxes	16035000	USD
CY2019	spnt	Dividendand Interest Income Netof Withholding Taxes DividendandInterestIncomeNetofWithholdingTaxes	18551000	USD
CY2018	spnt	Dividendand Interest Income Netof Withholding Taxes DividendandInterestIncomeNetofWithholdingTaxes	53523000	USD
CY2020	spnt	Dividends Paidon Securities Sold Not Yet Purchased DividendsPaidonSecuritiesSoldNotYetPurchased	0	USD
CY2019	spnt	Dividends Paidon Securities Sold Not Yet Purchased DividendsPaidonSecuritiesSoldNotYetPurchased	0	USD
CY2018	spnt	Dividends Paidon Securities Sold Not Yet Purchased DividendsPaidonSecuritiesSoldNotYetPurchased	5259000	USD
CY2020	spnt	Investment Income Other Investment Expense InvestmentIncomeOtherInvestmentExpense	1333000	USD
CY2019	spnt	Investment Income Other Investment Expense InvestmentIncomeOtherInvestmentExpense	954000	USD
CY2018	spnt	Investment Income Other Investment Expense InvestmentIncomeOtherInvestmentExpense	15696000	USD
CY2020	us-gaap	Affiliate Costs AffiliateCosts	0	USD
CY2019	us-gaap	Affiliate Costs AffiliateCosts	0	USD
CY2018	us-gaap	Affiliate Costs AffiliateCosts	29845000	USD
CY2020	spnt	Investment Income Net Related Party Investment Fund InvestmentIncomeNetRelatedPartyInvestmentFund	194988000	USD
CY2019	spnt	Investment Income Net Related Party Investment Fund InvestmentIncomeNetRelatedPartyInvestmentFund	249626000	USD
CY2018	spnt	Investment Income Net Related Party Investment Fund InvestmentIncomeNetRelatedPartyInvestmentFund	-280847000	USD
CY2020	spnt	Investment Income InvestmentIncome	278938000	USD
CY2019	spnt	Investment Income InvestmentIncome	282560000	USD
CY2018	spnt	Investment Income InvestmentIncome	-251433000	USD
CY2020	spnt	Other Investment Expense OtherInvestmentExpense	1021000	USD
CY2019	spnt	Other Investment Expense OtherInvestmentExpense	954000	USD
CY2018	spnt	Other Investment Expense OtherInvestmentExpense	-903000	USD
CY2020	spnt	Net Investment Incomefrom Derivatives NetInvestmentIncomefromDerivatives	0	USD
CY2019	spnt	Net Investment Incomefrom Derivatives NetInvestmentIncomefromDerivatives	0	USD
CY2018	spnt	Net Investment Incomefrom Derivatives NetInvestmentIncomefromDerivatives	644000	USD
CY2020	spnt	Net Investment Income From Cash Including Foreign Exchange Gain Loss NetInvestmentIncomeFromCashIncludingForeignExchangeGainLoss	12298000	USD
CY2019	spnt	Net Investment Income From Cash Including Foreign Exchange Gain Loss NetInvestmentIncomeFromCashIncludingForeignExchangeGainLoss	24676000	USD
CY2018	spnt	Net Investment Income From Cash Including Foreign Exchange Gain Loss NetInvestmentIncomeFromCashIncludingForeignExchangeGainLoss	-14885000	USD
CY2020	spnt	Net Investments Income From Securities Soldbut Not Yet Purchased NetInvestmentsIncomeFromSecuritiesSoldbutNotYetPurchased	0	USD
CY2019	spnt	Net Investments Income From Securities Soldbut Not Yet Purchased NetInvestmentsIncomeFromSecuritiesSoldbutNotYetPurchased	0	USD
CY2018	spnt	Net Investments Income From Securities Soldbut Not Yet Purchased NetInvestmentsIncomeFromSecuritiesSoldbutNotYetPurchased	-238000	USD
CY2020	spnt	Withholding Taxes Transferredto Income Tax Expense WithholdingTaxesTransferredtoIncomeTaxExpense	0	USD
CY2019	spnt	Withholding Taxes Transferredto Income Tax Expense WithholdingTaxesTransferredtoIncomeTaxExpense	0	USD
CY2018	spnt	Withholding Taxes Transferredto Income Tax Expense WithholdingTaxesTransferredtoIncomeTaxExpense	-6325000	USD
CY2020	spnt	Other Investment Incomeand Other OtherInvestmentIncomeandOther	11277000	USD
CY2019	spnt	Other Investment Incomeand Other OtherInvestmentIncomeandOther	23722000	USD
CY2018	spnt	Other Investment Incomeand Other OtherInvestmentIncomeandOther	-7251000	USD
CY2020	us-gaap	Affiliate Costs AffiliateCosts	0	USD
CY2019	us-gaap	Affiliate Costs AffiliateCosts	0	USD
CY2018	us-gaap	Affiliate Costs AffiliateCosts	29845000	USD
CY2020	spnt	Investment Income Net Related Party Investment Fund InvestmentIncomeNetRelatedPartyInvestmentFund	194988000	USD
CY2019	spnt	Investment Income Net Related Party Investment Fund InvestmentIncomeNetRelatedPartyInvestmentFund	249626000	USD
CY2018	spnt	Investment Income Net Related Party Investment Fund InvestmentIncomeNetRelatedPartyInvestmentFund	-280847000	USD
CY2020	spnt	Investment Income InvestmentIncome	278938000	USD
CY2019	spnt	Investment Income InvestmentIncome	282560000	USD
CY2018	spnt	Investment Income InvestmentIncome	-251433000	USD
CY2020	spnt	Corporate Expenses CorporateExpenses	39765000	USD
CY2019	spnt	Corporate Expenses CorporateExpenses	30397000	USD
CY2018	spnt	Corporate Expenses CorporateExpenses	17606000	USD
CY2020	spnt	Deposit Liabilities Investment Expense Income DepositLiabilitiesInvestmentExpenseIncome	852000	USD
CY2019	spnt	Deposit Liabilities Investment Expense Income DepositLiabilitiesInvestmentExpenseIncome	5879000	USD
CY2018	spnt	Deposit Liabilities Investment Expense Income DepositLiabilitiesInvestmentExpenseIncome	-1273000	USD
CY2020	spnt	Current Expected Credit Losses CurrentExpectedCreditLosses	624000	USD
CY2019	spnt	Current Expected Credit Losses CurrentExpectedCreditLosses	0	USD
CY2018	spnt	Current Expected Credit Losses CurrentExpectedCreditLosses	0	USD
CY2020	spnt	After The Event Fi AfterTheEventFI	-26000	USD
CY2019	spnt	After The Event Fi AfterTheEventFI	9000	USD
CY2018	spnt	After The Event Fi AfterTheEventFI	-149000	USD
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	41215000	USD
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	36285000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	16184000	USD
CY2020Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	1600000	USD
CY2019Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	1500000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8108000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	713000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4010000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	151966000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	201332000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-321479000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	0	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	0	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	-6325000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	68000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	0	USD
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-300000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	-4000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	10000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	-1000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8108000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	713000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4010000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	145000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	54000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6025000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7963000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	659000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-10035000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8108000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	713000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4010000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	1027000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	786000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	534000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	5543000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	1774000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	1567000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	2462000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	1208000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	1247000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	10131000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	9282000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	6798000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	19163000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	13050000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	10146000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	8276000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	1379000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	1490000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	10474000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	3366000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	-405000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	18750000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4745000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1085000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	413000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	8305000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	9061000	USD
CY2020Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	48500000	USD
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	94225498	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93639610	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	107227347	shares
CY2020	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2019	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	0	shares
CY2018	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	14256043	shares
CY2020	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	0	shares
CY2019	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	0	shares
CY2018	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	361556	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	95582733	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	94225498	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93639610	shares
CY2018	spnt	Stock Issued During Period Shares Conversionof Convertible Securities Grossof Adjustments StockIssuedDuringPeriodSharesConversionofConvertibleSecuritiesGrossofAdjustments	1156184	shares
CY2018	spnt	Stock Issued During Period Shares Conversionof Convertible Securities Adjustments StockIssuedDuringPeriodSharesConversionofConvertibleSecuritiesAdjustments	794628	shares
CY2018	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	361556	shares
CY2020Q4	spnt	Share Capital Authorized ShareCapitalAuthorized	33000000.0	USD
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	30000000	shares
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2016Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	100000000.0	USD
CY2018Q1	spnt	Stock Repurchase Program Increasein Authorized Amount StockRepurchaseProgramIncreaseinAuthorizedAmount	148300000	USD
CY2018Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	200000000.0	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	10311123	shares
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	138700000	USD
CY2018	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	13.45
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	61300000	USD
CY2020Q4	spnt	Maximum Percentof Warrants Reservedfor Issuance MaximumPercentofWarrantsReservedforIssuance	0.040
CY2020Q4	spnt	Maximum Valueof Warrants Reservedfor Issuance MaximumValueofWarrantsReservedforIssuance	1000000000	USD
CY2020Q4	spnt	Maximum Valueof Warrants Reservedfor Issuance MaximumValueofWarrantsReservedforIssuance	1000000000	USD
CY2020Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	3494979	shares
CY2020Q4	us-gaap	Warrants And Rights Outstanding WarrantsAndRightsOutstanding	13055000	USD
CY2020	spnt	Classof Warrantor Right Term ClassofWarrantorRightTerm	P10Y
CY2020Q4	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	10.00
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	6636000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	7061000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	4956000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	14200000	USD
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	7100000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y10M24D
CY2019	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y6M
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	8888053	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.43
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	8888053	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.43
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	393717	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	14.73
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	187678	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	10.00
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	8306658	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.45
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	8306658	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.45
CY2020Q4	us-gaap	Share Price SharePrice	10.00
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	0	USD
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	0	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	2400000	USD
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	2400000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1900000	USD
CY2020	us-gaap	Defined Contribution Plan Administrative Expenses DefinedContributionPlanAdministrativeExpenses	1000000.0	USD
CY2019	us-gaap	Defined Contribution Plan Administrative Expenses DefinedContributionPlanAdministrativeExpenses	900000	USD
CY2018	us-gaap	Defined Contribution Plan Administrative Expenses DefinedContributionPlanAdministrativeExpenses	900000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.54
CY2019Q4	spnt	Total Noncontrolling Interests TotalNoncontrollingInterests	0	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	341000	USD
CY2020	spnt	Contributions From Noncontrolling Interest ContributionsFromNoncontrollingInterest	1020000	USD
CY2020Q4	spnt	Total Noncontrolling Interests TotalNoncontrollingInterests	1361000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	92510090	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91835990	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	97054315	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	125530	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	0	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	91884	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	0	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	447709	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	598912	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	0	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92957799	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92652316	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	97054315	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	143517000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	200619000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-317692000	USD
CY2020	us-gaap	Undistributed Earnings UndistributedEarnings	1106000	USD
CY2019	us-gaap	Undistributed Earnings UndistributedEarnings	643000	USD
CY2018	us-gaap	Undistributed Earnings UndistributedEarnings	0	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	142411000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	199976000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-317692000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.18
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.27
CY2020	us-gaap	Net Income Loss NetIncomeLoss	143517000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	200619000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-317692000	USD
CY2020	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	1101000	USD
CY2019	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	637000	USD
CY2018	us-gaap	Undistributed Earnings Diluted UndistributedEarningsDiluted	0	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	142416000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	199982000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-317692000	USD
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.53
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.16
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.27
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3741266	shares
CY2020	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	900000	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	900000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	800000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	842000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	39000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	0	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	0	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	0	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	0	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	881000	USD
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	4	segment
CY2020	us-gaap	Premiums Written Gross PremiumsWrittenGross	588540000	USD
CY2020	us-gaap	Premiums Written Net PremiumsWrittenNet	542196000	USD
CY2020	us-gaap	Premiums Earned Net PremiumsEarnedNet	610852000	USD
CY2020	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	465298000	USD
CY2020	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	187062000	USD
CY2020	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	30800000	USD
CY2020	spnt	Insurance Underwriting Loss InsuranceUnderwritingLoss	72308000	USD
CY2020	spnt	Investment Income InvestmentIncome	278938000	USD
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	41215000	USD
CY2020	us-gaap	Interest Expense InterestExpense	8230000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-5219000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	151966000	USD
CY2020	us-gaap	Loss Ratio LossRatio	0.762
CY2020	us-gaap	Acquisition Cost Ratio AcquisitionCostRatio	0.306
CY2020	us-gaap	Underwriting Expense Ratio UnderwritingExpenseRatio	0.050
CY2020	us-gaap	Combined Ratio CombinedRatio	1.118
CY2019	us-gaap	Premiums Written Gross PremiumsWrittenGross	668414000	USD
CY2019	us-gaap	Premiums Written Net PremiumsWrittenNet	657038000	USD
CY2019	us-gaap	Premiums Earned Net PremiumsEarnedNet	700142000	USD
CY2019	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	403499000	USD
CY2019	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	295626000	USD
CY2019	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	34097000	USD
CY2019	spnt	Insurance Underwriting Loss InsuranceUnderwritingLoss	33080000	USD
CY2019	spnt	Investment Income InvestmentIncome	282560000	USD
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	36285000	USD
CY2019	us-gaap	Interest Expense InterestExpense	8228000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-3635000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	201332000	USD
CY2019	us-gaap	Loss Ratio LossRatio	0.576
CY2018	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	624834000	USD
CY2020	spnt	Premiums Earned Gross PremiumsEarnedGross	639855000	USD
CY2019	us-gaap	Acquisition Cost Ratio AcquisitionCostRatio	0.422
CY2019	us-gaap	Underwriting Expense Ratio UnderwritingExpenseRatio	0.049
CY2019	us-gaap	Combined Ratio CombinedRatio	1.047
CY2018	us-gaap	Premiums Written Gross PremiumsWrittenGross	650187000	USD
CY2018	us-gaap	Premiums Written Net PremiumsWrittenNet	646018000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	621442000	USD
CY2018	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	438414000	USD
CY2018	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	206498000	USD
CY2018	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	29667000	USD
CY2018	spnt	Insurance Underwriting Loss InsuranceUnderwritingLoss	53137000	USD
CY2018	spnt	Investment Income InvestmentIncome	-251433000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	16184000	USD
CY2018	us-gaap	Interest Expense InterestExpense	8228000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	7503000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-321479000	USD
CY2018	us-gaap	Loss Ratio LossRatio	0.705
CY2018	us-gaap	Acquisition Cost Ratio AcquisitionCostRatio	0.332
CY2018	us-gaap	Underwriting Expense Ratio UnderwritingExpenseRatio	0.048
CY2018	us-gaap	Combined Ratio CombinedRatio	1.085
CY2020	us-gaap	Direct Premiums Written DirectPremiumsWritten	19039000	USD
CY2019	us-gaap	Direct Premiums Written DirectPremiumsWritten	0	USD
CY2018	us-gaap	Direct Premiums Written DirectPremiumsWritten	0	USD
CY2020	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	569501000	USD
CY2019	spnt	Premiums Earned Gross PremiumsEarnedGross	710014000	USD
CY2018	spnt	Premiums Earned Gross PremiumsEarnedGross	624834000	USD
CY2020	us-gaap	Ceded Premiums Earned CededPremiumsEarned	29003000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	621442000	USD
CY2019	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	668414000	USD
CY2018	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	650187000	USD
CY2020	us-gaap	Premiums Written Gross PremiumsWrittenGross	588540000	USD
CY2019	us-gaap	Premiums Written Gross PremiumsWrittenGross	668414000	USD
CY2018	us-gaap	Premiums Written Gross PremiumsWrittenGross	650187000	USD
CY2020	us-gaap	Ceded Premiums Written CededPremiumsWritten	46344000	USD
CY2019	us-gaap	Ceded Premiums Written CededPremiumsWritten	11376000	USD
CY2018	us-gaap	Ceded Premiums Written CededPremiumsWritten	4169000	USD
CY2020	us-gaap	Premiums Written Net PremiumsWrittenNet	542196000	USD
CY2019	us-gaap	Premiums Written Net PremiumsWrittenNet	657038000	USD
CY2018	us-gaap	Premiums Written Net PremiumsWrittenNet	646018000	USD
CY2020	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1038000	USD
CY2019	us-gaap	Direct Premiums Earned DirectPremiumsEarned	0	USD
CY2018	us-gaap	Direct Premiums Earned DirectPremiumsEarned	0	USD
CY2020	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	638817000	USD
CY2019	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	710014000	USD
CY2019	us-gaap	Ceded Premiums Earned CededPremiumsEarned	9872000	USD
CY2018	us-gaap	Ceded Premiums Earned CededPremiumsEarned	3392000	USD
CY2020	us-gaap	Premiums Earned Net PremiumsEarnedNet	610852000	USD
CY2019	us-gaap	Premiums Earned Net PremiumsEarnedNet	700142000	USD
CY2020Q4	spnt	Statutory Accounting Practices Liquidity Ratio Minimum Percentage Required StatutoryAccountingPracticesLiquidityRatioMinimumPercentageRequired	0.75
CY2020Q4	us-gaap	Investments Investments	1160929000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	525991000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1187948000	USD
CY2020Q4	spnt	Investmentsin Subsidiaries Consolidated InvestmentsinSubsidiariesConsolidated	0	USD
CY2020Q4	us-gaap	Receivables From Brokers Dealers And Clearing Organizations ReceivablesFromBrokersDealersAndClearingOrganizations	94902000	USD
CY2020Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	909000	USD
CY2020Q4	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	441935000	USD
CY2020Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	68550000	USD
CY2020Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	20464000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1565286000	USD
CY2020Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	14375000	USD
CY2020Q4	us-gaap	Due From Affiliates DueFromAffiliates	0	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	19185000	USD
CY2020Q4	us-gaap	Assets Assets	3535188000	USD
CY2020Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	14588000	USD
CY2020Q4	us-gaap	Reinsurance Payable ReinsurancePayable	78115000	USD
CY2020Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	152961000	USD
CY2020Q4	us-gaap	Unearned Premiums UnearnedPremiums	284835000	USD
CY2020Q4	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	1310068000	USD
CY2020Q4	us-gaap	Financial Instruments Sold Not Yet Purchased At Fair Value FinancialInstrumentsSoldNotYetPurchasedAtFairValue	11990000	USD
CY2020Q4	us-gaap	Interest And Dividends Payable Current And Noncurrent InterestAndDividendsPayableCurrentAndNoncurrent	3078000	USD
CY2020Q4	us-gaap	Senior Notes Current SeniorNotesCurrent	114267000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	1969902000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	9558000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	933903000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	620464000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1563925000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	1361000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3535188000	USD
CY2019Q4	us-gaap	Investments Investments	989701000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	639415000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1014543000	USD
CY2019Q4	spnt	Investmentsin Subsidiaries Consolidated InvestmentsinSubsidiariesConsolidated	0	USD
CY2019Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	2178000	USD
CY2019Q4	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	478452000	USD
CY2019Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	92164000	USD
CY2019Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	3123000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	5520000	USD
CY2019Q4	us-gaap	Due From Affiliates DueFromAffiliates	0	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	20555000	USD
CY2019Q4	us-gaap	Assets Assets	3245651000	USD
CY2019Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	17816000	USD
CY2019Q4	us-gaap	Reinsurance Payable ReinsurancePayable	76516000	USD
CY2019Q4	us-gaap	Deposit Contracts Liabilities DepositContractsLiabilities	172259000	USD
CY2019Q4	us-gaap	Unearned Premiums UnearnedPremiums	336150000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	1111692000	USD
CY2019Q4	us-gaap	Interest And Dividends Payable Current And Noncurrent InterestAndDividendsPayableCurrentAndNoncurrent	3055000	USD
CY2019Q4	us-gaap	Senior Notes Current SeniorNotesCurrent	114089000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	1831577000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	9423000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	927704000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	476947000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1414074000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	3245651000	USD
CY2020	us-gaap	Premiums Written Gross PremiumsWrittenGross	588540000	USD
CY2020	us-gaap	Ceded Premiums Written CededPremiumsWritten	46344000	USD
CY2020	us-gaap	Premiums Written Net PremiumsWrittenNet	542196000	USD
CY2020	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	68656000	USD
CY2020	us-gaap	Premiums Earned Net PremiumsEarnedNet	610852000	USD
CY2020	spnt	Investment Income InvestmentIncome	278938000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2020	us-gaap	Revenues Revenues	889790000	USD
CY2020	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	465298000	USD
CY2020	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	187062000	USD
CY2020	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	30800000	USD
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	41215000	USD
CY2020	us-gaap	Interest Expense InterestExpense	8230000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-5219000	USD
CY2020	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	737824000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	151966000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8108000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	143858000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	341000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	143517000	USD
CY2019	us-gaap	Premiums Written Gross PremiumsWrittenGross	668414000	USD
CY2019	us-gaap	Ceded Premiums Written CededPremiumsWritten	11376000	USD
CY2019	us-gaap	Premiums Written Net PremiumsWrittenNet	657038000	USD
CY2019	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	403499000	USD
CY2019	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	295626000	USD
CY2018	us-gaap	Premiums Written Gross PremiumsWrittenGross	650187000	USD
CY2019	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	43104000	USD
CY2019	us-gaap	Premiums Earned Net PremiumsEarnedNet	700142000	USD
CY2019	spnt	Investment Income InvestmentIncome	282560000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2019	us-gaap	Revenues Revenues	982702000	USD
CY2019	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	34097000	USD
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	36285000	USD
CY2019	us-gaap	Interest Expense InterestExpense	8228000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-3635000	USD
CY2019	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	781370000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	201332000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	713000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	200619000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	200619000	USD
CY2018	us-gaap	Ceded Premiums Written CededPremiumsWritten	4169000	USD
CY2018	us-gaap	Premiums Written Net PremiumsWrittenNet	646018000	USD
CY2018	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-24576000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	621442000	USD
CY2018	spnt	Investment Income InvestmentIncome	-251433000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2018	us-gaap	Revenues Revenues	370009000	USD
CY2018	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	438414000	USD
CY2018	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	206498000	USD
CY2018	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	29667000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	16184000	USD
CY2018	us-gaap	Interest Expense InterestExpense	8228000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	7503000	USD
CY2018	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	691488000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-321479000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4010000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	-317469000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	223000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-317692000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	143858000	USD
CY2020	spnt	Equityin Earningsof Consolidated Subsidiaries EquityinEarningsofConsolidatedSubsidiaries	0	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	6636000	USD
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities InterestExpenseDomesticDepositLiabilities	852000	USD
CY2020	us-gaap	Net Realized Or Unrealized Gain Loss On Trading Securities NetRealizedOrUnrealizedGainLossOnTradingSecurities	62498000	USD
CY2020	spnt	Net Realizedand Unrealized Gain Losson Trading Securitiesrelatedpartyinvestmentfund NetRealizedandUnrealizedGainLossonTradingSecuritiesrelatedpartyinvestmentfund	194988000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-5219000	USD
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	3831000	USD
CY2020	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-38610000	USD
CY2020	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-23614000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	17341000	USD
CY2020	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	8855000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3267000	USD
CY2020	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	-1292000	USD
CY2020	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-51315000	USD
CY2020	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	190325000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-3269000	USD
CY2020	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	1780000	USD
CY2020	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	0	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	73356000	USD
CY2020	us-gaap	Payments To Acquire Trading Securities Heldforinvestment PaymentsToAcquireTradingSecuritiesHeldforinvestment	444111000	USD
CY2020	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	532247000	USD
CY2020	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	2846000	USD
CY2020	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	15721000	USD
CY2020	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	-94902000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	6109000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	302000	USD
CY2020	spnt	Increase Decreasein Deposit Contracts Liabilities IncreaseDecreaseinDepositContractsLiabilities	-20202000	USD
CY2020	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	1020000	USD
CY2020	us-gaap	Cash Dividends Paid To Parent Company By Consolidated Subsidiaries CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries	0	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	68000	USD
CY2019	spnt	Increase Decreasein Deposit Contracts Liabilities IncreaseDecreaseinDepositContractsLiabilities	10832000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-19484000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	59981000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1653958000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1713939000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	200619000	USD
CY2019	spnt	Equityin Earningsof Consolidated Subsidiaries EquityinEarningsofConsolidatedSubsidiaries	0	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	7061000	USD
CY2019	us-gaap	Interest Expense Domestic Deposit Liabilities InterestExpenseDomesticDepositLiabilities	5879000	USD
CY2019	us-gaap	Net Realized Or Unrealized Gain Loss On Trading Securities NetRealizedOrUnrealizedGainLossOnTradingSecurities	2522000	USD
CY2019	spnt	Net Realizedand Unrealized Gain Losson Trading Securitiesrelatedpartyinvestmentfund NetRealizedandUnrealizedGainLossonTradingSecuritiesrelatedpartyinvestmentfund	249626000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-3635000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	1382000	USD
CY2019	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-20355000	USD
CY2019	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-24782000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	1504000	USD
CY2019	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	3489000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	172000	USD
CY2019	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	862000	USD
CY2019	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-41600000	USD
CY2019	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	157849000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	10555000	USD
CY2019	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	11534000	USD
CY2019	us-gaap	Increase Decrease In Due To Affiliates IncreaseDecreaseInDueToAffiliates	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	141112000	USD
CY2019	spnt	Proceedsfrom Trading Securities Heldfor Investment Related Party Investment Fund ProceedsfromTradingSecuritiesHeldforInvestmentRelatedPartyInvestmentFund	760000000	USD
CY2019	spnt	Paymentsto Acquire Trading Securities Heldfor Investment Related Party Investment Fund PaymentstoAcquireTradingSecuritiesHeldforInvestmentRelatedPartyInvestmentFund	87000000	USD
CY2019	spnt	Increasedecreasein Participation Agreementwith Related Party Investment Fund IncreasedecreaseinParticipationAgreementwithRelatedPartyInvestmentFund	-2297000	USD
CY2019	us-gaap	Payments To Acquire Trading Securities Heldforinvestment PaymentsToAcquireTradingSecuritiesHeldforinvestment	331463000	USD
CY2019	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	446206000	USD
CY2019	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	1411000	USD
CY2019	spnt	Contributed Capital To Subsidiaries ContributedCapitalToSubsidiaries	0	USD
CY2019	us-gaap	Proceeds From Contributed Capital ProceedsFromContributedCapital	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	786857000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1888000	USD
CY2019	us-gaap	Cash Dividends Paid To Parent Company By Consolidated Subsidiaries CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries	0	USD
CY2018	us-gaap	Proceeds From Contributed Capital ProceedsFromContributedCapital	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	12652000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	940621000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	713337000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1653958000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	-317469000	USD
CY2018	spnt	Equityin Earningsof Consolidated Subsidiaries EquityinEarningsofConsolidatedSubsidiaries	0	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	4956000	USD
CY2018	us-gaap	Interest Expense Domestic Deposit Liabilities InterestExpenseDomesticDepositLiabilities	-1273000	USD
CY2018	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	34145000	USD
CY2018	spnt	Net Realizedand Unrealized Gain Losson Trading Securitiesrelatedpartyinvestmentfund NetRealizedandUnrealizedGainLossonTradingSecuritiesrelatedpartyinvestmentfund	-280847000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	7503000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-4134000	USD
CY2018	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	157214000	USD
CY2018	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-8746000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	777000	USD
CY2018	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	918000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	13486000	USD
CY2018	us-gaap	Increase Decrease In Interest And Dividends Receivable IncreaseDecreaseInInterestAndDividendsReceivable	2716000	USD
CY2018	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	25353000	USD
CY2018	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	225670000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-24684000	USD
CY2018	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	23866000	USD
CY2018	us-gaap	Increase Decrease Due From Affiliates IncreaseDecreaseDueFromAffiliates	0	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	13387000	USD
CY2018	spnt	Proceedsfrom Trading Securities Heldfor Investment Related Party Investment Fund ProceedsfromTradingSecuritiesHeldforInvestmentRelatedPartyInvestmentFund	142968000	USD
CY2018	spnt	Paymentsto Acquire Trading Securities Heldfor Investment Related Party Investment Fund PaymentstoAcquireTradingSecuritiesHeldforInvestmentRelatedPartyInvestmentFund	136626000	USD
CY2018	spnt	Increasedecreasein Participation Agreementwith Related Party Investment Fund IncreasedecreaseinParticipationAgreementwithRelatedPartyInvestmentFund	-20852000	USD
CY2018	us-gaap	Payments To Acquire Trading Securities Heldforinvestment PaymentsToAcquireTradingSecuritiesHeldforinvestment	3483319000	USD
CY2018	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	3475515000	USD
CY2018	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	853798000	USD
CY2018	us-gaap	Proceeds From Derivative Instrument Investing Activities ProceedsFromDerivativeInstrumentInvestingActivities	800508000	USD
CY2018	us-gaap	Increase Decrease In Payables To Broker Dealers IncreaseDecreaseInPayablesToBrokerDealers	482778000	USD
CY2018	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-29618000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	377556000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	74000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	138705000	USD
CY2018	spnt	Increase Decreasein Deposit Contracts Liabilities IncreaseDecreaseinDepositContractsLiabilities	9790000	USD
CY2018	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-97950000	USD
CY2018	us-gaap	Cash Dividends Paid To Parent Company By Consolidated Subsidiaries CashDividendsPaidToParentCompanyByConsolidatedSubsidiaries	0	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-226939000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	164004000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	549333000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	713337000	USD
CY2020Q4	us-gaap	Premiums Written Gross PremiumsWrittenGross	190358000	USD
CY2020Q3	us-gaap	Premiums Written Gross PremiumsWrittenGross	124737000	USD
CY2020Q2	us-gaap	Premiums Written Gross PremiumsWrittenGross	147740000	USD
CY2020Q1	us-gaap	Premiums Written Gross PremiumsWrittenGross	125705000	USD
CY2020Q4	us-gaap	Ceded Premiums Written CededPremiumsWritten	17090000	USD
CY2020Q1	spnt	Investment Income InvestmentIncome	-185027000	USD
CY2020Q4	us-gaap	Revenues Revenues	386813000	USD
CY2020Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	8286000	USD
CY2020Q2	us-gaap	Ceded Premiums Written CededPremiumsWritten	18423000	USD
CY2020Q1	us-gaap	Ceded Premiums Written CededPremiumsWritten	2545000	USD
CY2020Q4	us-gaap	Premiums Written Net PremiumsWrittenNet	173268000	USD
CY2020Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	116451000	USD
CY2020Q2	us-gaap	Premiums Written Net PremiumsWrittenNet	129317000	USD
CY2020Q1	us-gaap	Premiums Written Net PremiumsWrittenNet	123160000	USD
CY2020Q4	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	8747000	USD
CY2020Q3	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	25261000	USD
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CY2020Q4	us-gaap	Premiums Earned Net PremiumsEarnedNet	182015000	USD
CY2020Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	141712000	USD
CY2020Q2	us-gaap	Premiums Earned Net PremiumsEarnedNet	140810000	USD
CY2020Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	146315000	USD
CY2020Q4	spnt	Investment Income InvestmentIncome	204798000	USD
CY2020Q3	us-gaap	Revenues Revenues	263668000	USD
CY2020Q3	spnt	Investment Income InvestmentIncome	121956000	USD
CY2020Q2	spnt	Investment Income InvestmentIncome	137211000	USD
CY2020Q2	us-gaap	Revenues Revenues	278021000	USD
CY2020Q1	us-gaap	Revenues Revenues	-38712000	USD
CY2020Q4	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	177919000	USD
CY2020Q3	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	110487000	USD
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CY2020Q1	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	87786000	USD
CY2020Q4	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	39321000	USD
CY2020Q3	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	54817000	USD
CY2020Q2	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	43671000	USD
CY2020Q1	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	49253000	USD
CY2020Q4	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	9714000	USD
CY2020Q3	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	6072000	USD
CY2020Q2	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	7793000	USD
CY2020Q1	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	7221000	USD
CY2020Q4	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	10957000	USD
CY2020Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	14965000	USD
CY2020Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-5885000	USD
CY2020Q2	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	797000	USD
CY2020Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	8217000	USD
CY2020Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	8878000	USD
CY2020Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	6415000	USD
CY2020Q4	us-gaap	Interest Expense InterestExpense	2068000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	2068000	USD
CY2020Q2	us-gaap	Interest Expense InterestExpense	2046000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	2048000	USD
CY2020Q4	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-8348000	USD
CY2020Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	248327000	USD
CY2020Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	194294000	USD
CY2020Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	150697000	USD
CY2020Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	144506000	USD
CY2020Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	138486000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	69374000	USD
CY2020Q2	us-gaap	Profit Loss ProfitLoss	124015000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-183637000	USD
CY2020Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	362000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	127324000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-183218000	USD
CY2020Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3728000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	652000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3309000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	419000	USD
CY2020Q4	us-gaap	Profit Loss ProfitLoss	134758000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	68722000	USD
CY2020Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-21000	USD
CY2020Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	134396000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	68743000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	124015000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-183637000	USD
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.43
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.74
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.33
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.99
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.43
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.73
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.33
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.99
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	92638978	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	92613393	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	92593599	shares
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	92191837	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	93165559	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92969646	shares
CY2019Q1	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	95068000	USD
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92738293	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92191837	shares
CY2019Q4	us-gaap	Premiums Written Gross PremiumsWrittenGross	191203000	USD
CY2019Q3	us-gaap	Premiums Written Gross PremiumsWrittenGross	184856000	USD
CY2019Q2	us-gaap	Premiums Written Gross PremiumsWrittenGross	149035000	USD
CY2019Q1	us-gaap	Premiums Written Gross PremiumsWrittenGross	143320000	USD
CY2019Q4	us-gaap	Ceded Premiums Written CededPremiumsWritten	4459000	USD
CY2019Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	1928000	USD
CY2019Q2	us-gaap	Ceded Premiums Written CededPremiumsWritten	2744000	USD
CY2019Q1	us-gaap	Ceded Premiums Written CededPremiumsWritten	2245000	USD
CY2019Q4	us-gaap	Premiums Written Net PremiumsWrittenNet	186744000	USD
CY2019Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	182928000	USD
CY2019Q2	us-gaap	Premiums Written Net PremiumsWrittenNet	146291000	USD
CY2019Q1	us-gaap	Premiums Written Net PremiumsWrittenNet	141075000	USD
CY2019Q4	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	11648000	USD
CY2019Q3	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	20320000	USD
CY2019Q1	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	57498000	USD
CY2019Q4	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	61851000	USD
CY2019Q3	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	118271000	USD
CY2019Q1	spnt	Investment Income InvestmentIncome	154953000	USD
CY2019Q2	us-gaap	Revenues Revenues	214583000	USD
CY2019Q4	us-gaap	Revenues Revenues	260006000	USD
CY2019Q3	us-gaap	Revenues Revenues	200110000	USD
CY2019Q2	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-839000	USD
CY2019Q1	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	11975000	USD
CY2019Q4	us-gaap	Premiums Earned Net PremiumsEarnedNet	198392000	USD
CY2019Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	203248000	USD
CY2019Q2	us-gaap	Premiums Earned Net PremiumsEarnedNet	145452000	USD
CY2019Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	153050000	USD
CY2019Q4	spnt	Investment Income InvestmentIncome	61614000	USD
CY2019Q3	spnt	Investment Income InvestmentIncome	-3138000	USD
CY2019Q2	spnt	Investment Income InvestmentIncome	69131000	USD
CY2019Q1	us-gaap	Revenues Revenues	308003000	USD
CY2019Q4	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	140394000	USD
CY2019Q3	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	85703000	USD
CY2019Q2	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	82334000	USD
CY2019Q2	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	58006000	USD
CY2019Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	230986000	USD
CY2019Q4	us-gaap	Interest Expense InterestExpense	2074000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	2074000	USD
CY2019Q2	us-gaap	Interest Expense InterestExpense	2051000	USD
CY2019Q4	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	8336000	USD
CY2019Q3	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	7286000	USD
CY2019Q2	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	9636000	USD
CY2019Q1	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	8839000	USD
CY2019Q4	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	8033000	USD
CY2019Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	7009000	USD
CY2019Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	13825000	USD
CY2019Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	7418000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	2029000	USD
CY2019Q4	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-10298000	USD
CY2019Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	4921000	USD
CY2019Q2	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	4260000	USD
CY2019Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-2518000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1718000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-74000	USD
CY2019Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	215422000	USD
CY2019Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	161592000	USD
CY2019Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	173370000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	29020000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-15312000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	52991000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	134633000	USD
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-718000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-213000	USD
CY2019Q4	us-gaap	Profit Loss ProfitLoss	29738000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	-15099000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	53065000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	132915000	USD
CY2019Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2019Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2019Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	29738000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-15099000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	53065000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	132915000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.16
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.58
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.45
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.16
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.57
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.43
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91989469	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92578933	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91903556	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91776870	shares
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91669810	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92696491	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	91903556	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92801799	shares
CY2020Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Cost SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost	95452000	USD
CY2020Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Fair Value SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue	105311000	USD
CY2020Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Carrying Amount SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount	105311000	USD
CY2020Q4	us-gaap	Supplementary Insurance Information Deferred Policy Acquisition Costs SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts	68550000	USD
CY2020Q4	us-gaap	Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves	1310068000	USD
CY2020Q4	us-gaap	Supplementary Insurance Information Unearned Premiums SupplementaryInsuranceInformationUnearnedPremiums	284835000	USD
CY2020	us-gaap	Supplementary Insurance Information Premium Revenue SupplementaryInsuranceInformationPremiumRevenue	610852000	USD
CY2020	us-gaap	Supplementary Insurance Information Net Investment Income SupplementaryInsuranceInformationNetInvestmentIncome	278938000	USD
CY2020	us-gaap	Supplementary Insurance Information Benefits Claims Losses And Settlement Expense SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense	465298000	USD
CY2020	us-gaap	Supplementary Insurance Information Amortization Of Deferred Policy Acquisition Costs SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts	187062000	USD
CY2020	us-gaap	Supplementary Insurance Information Other Operating Expense SupplementaryInsuranceInformationOtherOperatingExpense	72015000	USD
CY2020	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	542196000	USD
CY2019Q4	us-gaap	Supplementary Insurance Information Deferred Policy Acquisition Costs SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts	92164000	USD
CY2019Q4	us-gaap	Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves	1111692000	USD
CY2019Q4	us-gaap	Supplementary Insurance Information Unearned Premiums SupplementaryInsuranceInformationUnearnedPremiums	336150000	USD
CY2019	us-gaap	Supplementary Insurance Information Premium Revenue SupplementaryInsuranceInformationPremiumRevenue	700142000	USD
CY2019	us-gaap	Supplementary Insurance Information Net Investment Income SupplementaryInsuranceInformationNetInvestmentIncome	282560000	USD
CY2019	us-gaap	Supplementary Insurance Information Benefits Claims Losses And Settlement Expense SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense	403499000	USD
CY2019	us-gaap	Supplementary Insurance Information Amortization Of Deferred Policy Acquisition Costs SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts	295626000	USD
CY2019	us-gaap	Supplementary Insurance Information Other Operating Expense SupplementaryInsuranceInformationOtherOperatingExpense	70382000	USD
CY2019	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	657038000	USD
CY2018Q4	us-gaap	Supplementary Insurance Information Deferred Policy Acquisition Costs SupplementaryInsuranceInformationDeferredPolicyAcquisitionCosts	116946000	USD
CY2018Q4	us-gaap	Supplementary Insurance Information Liability For Future Policy Benefits Losses Claims And Loss Expense Reserves SupplementaryInsuranceInformationLiabilityForFuturePolicyBenefitsLossesClaimsAndLossExpenseReserves	937160000	USD
CY2018Q4	us-gaap	Supplementary Insurance Information Unearned Premiums SupplementaryInsuranceInformationUnearnedPremiums	377750000	USD
CY2018	us-gaap	Supplementary Insurance Information Premium Revenue SupplementaryInsuranceInformationPremiumRevenue	621442000	USD
CY2018	us-gaap	Supplementary Insurance Information Net Investment Income SupplementaryInsuranceInformationNetInvestmentIncome	-251433000	USD
CY2018	us-gaap	Supplementary Insurance Information Benefits Claims Losses And Settlement Expense SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense	438414000	USD
CY2018	us-gaap	Supplementary Insurance Information Amortization Of Deferred Policy Acquisition Costs SupplementaryInsuranceInformationAmortizationOfDeferredPolicyAcquisitionCosts	206498000	USD
CY2018	us-gaap	Supplementary Insurance Information Other Operating Expense SupplementaryInsuranceInformationOtherOperatingExpense	45851000	USD
CY2018	us-gaap	Supplementary Insurance Information Premiums Written SupplementaryInsuranceInformationPremiumsWritten	646018000	USD

Files In Submission

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$SPNT
SiriusPoint Ltd Stock $spnt

2020 Q4 Form 8-K Financial Statement

#000157601821000153 Filed on June 17, 2021

Income Statement

Balance Sheet

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$SPNT SiriusPoint Ltd Stock $spnt

2020 Q4 Form 8-K Financial Statement

#000157601821000153 Filed on June 17, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SPNT
SiriusPoint Ltd Stock $spnt