$rnr 2017 10-K

Concept	2017	2016 Q4	2016 Q3
Revenue	$2.104B	$354.0M	$442.5M
YoY Change	21.75%	-6.2%	23.51%
Cost Of Revenue	$1.861B	$123.9M	$112.6M
YoY Change	250.66%	21.46%	12.54%
Gross Profit	$242.3M	$230.1M	$329.9M
YoY Change	-79.76%	-16.45%	27.76%
Gross Profit Margin	11.52%	65.0%	74.56%
Selling, General & Admin	$179.4M	$61.80M	$52.00M
YoY Change	-23.72%	-17.93%	-16.13%
% of Gross Profit	74.06%	26.86%	15.76%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$346.9M	$74.15M	$80.58M
YoY Change	19.9%	33.84%	3.14%
% of Gross Profit	143.2%	32.23%	24.43%
Operating Expenses	$160.8M	$49.95M	$40.49M
YoY Change	-18.7%	-22.32%	-25.73%
Operating Profit	$81.47M	$180.1M	$289.4M
YoY Change	-91.85%	-14.66%	42.07%
Interest Expense	$44.19M	$10.53M	$10.54M
YoY Change	4.86%	-0.15%	-0.06%
% of Operating Profit	54.24%	5.85%	3.64%
Other Income/Expense, Net
YoY Change
Pretax Income	-$328.2M	$83.55M	$186.7M
YoY Change	-152.06%	-37.8%	73.39%
Income Tax	$26.49M	-$7.700M	-$1.316M
% Of Pretax Income		-9.22%	-0.7%
Net Earnings	-$222.4M	$75.03M	$152.4M
YoY Change	-144.22%	-23.28%	87.89%
Net Earnings / Revenue	-10.57%	21.2%	34.45%
Basic Earnings Per Share	-$6.15	$1.70	$3.58
Diluted Earnings Per Share	-$6.15	$1.69	$3.56
COMMON SHARES
Basic Shares Outstanding	39.85M shares	40.47M shares	40.51M shares
Diluted Shares Outstanding	39.85M shares	40.71M shares	40.73M shares

Concept	2017	2016 Q4	2016 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$1.362B	$421.2M	$493.3M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$103.0M	$106.0M	$193.0M
YoY Change	-2.83%	-52.04%	-40.06%
LONG-TERM ASSETS
Property, Plant & Equipment
YoY Change
Goodwill
YoY Change
Intangibles		$65.46M
YoY Change		-21.04%
Long-Term Investments	$9.503B	$124.2M	$120.6M
YoY Change	2.0%	-6.14%	-6.89%
Other Assets	$57.00M
YoY Change	-28.75%
Total Long-Term Assets	$15.12B	$12.25B	$12.47B
YoY Change	23.49%	8.04%	7.61%
TOTAL ASSETS
Total Short-Term Assets	$103.0M	$106.0M	$193.0M
Total Long-Term Assets	$15.12B	$12.25B	$12.47B
Total Assets	$15.23B	$12.35B	$12.66B
YoY Change	23.27%	6.9%	6.32%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
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	$209.0M	$306.0M	$438.0M
YoY Change	-31.7%	-21.74%	-27.36%
LONG-TERM LIABILITIES
Long-Term Debt	$990.0M	$949.0M	$952.0M
YoY Change	4.32%	-1.15%	-1.75%
Other Long-Term Liabilities	$793.0M	$302.0M	$228.0M
YoY Change	162.58%	23.27%	-6.56%
Total Long-Term Liabilities	$1.783B	$1.251B	$1.180B
YoY Change	42.53%	3.82%	-2.72%
TOTAL LIABILITIES
Total Short-Term Liabilities	$209.0M	$306.0M	$438.0M
Total Long-Term Liabilities	$1.783B	$1.251B	$1.180B
Total Liabilities	$10.84B	$6.310B	$6.687B
YoY Change	44.74%	9.22%	8.08%
SHAREHOLDERS EQUITY
Retained Earnings		$4.208B	$4.151B
YoY Change		11.35%	12.2%
Common Stock		$41.19M	$41.16M
YoY Change		-5.75%	-6.72%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$4.391B	$4.867B	$4.808B
YoY Change
Total Liabilities & Shareholders Equity	$15.23B	$12.35B	$12.66B
YoY Change	23.27%	6.9%	6.32%

Concept	2017	2016 Q4	2016 Q3
OPERATING ACTIVITIES
Net Income	-$222.4M	$75.03M	$152.4M
YoY Change	-144.22%	-23.28%	87.89%
Depreciation, Depletion And Amortization	$346.9M	$74.15M	$80.58M
YoY Change	19.9%	33.84%	3.14%
Cash From Operating Activities	$1.026B	$89.40M	$263.2M
YoY Change	111.6%	-64.61%	37.44%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions	$0.00
YoY Change
Other Investing Activities	$0.00	-$190.2M	-$149.9M
YoY Change	-100.0%	3.59%	-196.71%
Cash From Investing Activities	-$122.4M	-$190.2M	-$149.9M
YoY Change	-25.59%	3.59%	-196.71%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$188.6M
YoY Change	-39.05%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$28.86M	34.60M	-74.70M
YoY Change	-107.19%	-139.82%	-65.4%
NET CHANGE
Cash From Operating Activities	$1.026B	89.40M	263.2M
Cash From Investing Activities	-$122.4M	-190.2M	-149.9M
Cash From Financing Activities	$28.86M	34.60M	-74.70M
Net Change In Cash	$940.4M	-66.20M	38.60M
YoY Change	-1259.73%	269.83%	-70.44%
FREE CASH FLOW
Cash From Operating Activities	$1.026B	$89.40M	$263.2M
Capital Expenditures
Free Cash Flow
YoY Change

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	0	USD
CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0000913144
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	40023789	shares
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2017Q2	dei	Entity Public Float EntityPublicFloat	5498000000	USD
CY2017	dei	Entity Registrant Name EntityRegistrantName	RENAISSANCERE HOLDINGS LTD.
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2017	dei	Trading Symbol TradingSymbol	RNR
CY2017	rnr	Capital Lease Term CapitalLeaseTerm	P20Y
CY2017	rnr	Capital Lease Term Renewal Option CapitalLeaseTermRenewalOption	P30Y
CY2017Q4	rnr	Debt Instrument Unamortized Debt Discount And Issuance Expense DebtInstrumentUnamortizedDebtDiscountAndIssuanceExpense	10377000	USD
CY2016Q4	rnr	Deferred Tax Asset Liability Before Valuation Allowance Net DeferredTaxAssetLiabilityBeforeValuationAllowanceNet	98898000	USD
CY2017Q4	rnr	Deferred Tax Asset Liability Before Valuation Allowance Net DeferredTaxAssetLiabilityBeforeValuationAllowanceNet	86709000	USD
CY2016Q4	rnr	Deferred Tax Assets Equity Method Investments Available For Sale Investmentsand Derivatives DeferredTaxAssetsEquityMethodInvestmentsAvailableForSaleInvestmentsandDerivatives	3269000	USD
CY2017Q4	rnr	Deferred Tax Assets Equity Method Investments Available For Sale Investmentsand Derivatives DeferredTaxAssetsEquityMethodInvestmentsAvailableForSaleInvestmentsandDerivatives	0	USD
CY2016Q4	rnr	Deferred Tax Liabilities Deferred Expense Deferred Acquisition Costs DeferredTaxLiabilitiesDeferredExpenseDeferredAcquisitionCosts	7485000	USD
CY2017Q4	rnr	Deferred Tax Liabilities Deferred Expense Deferred Acquisition Costs DeferredTaxLiabilitiesDeferredExpenseDeferredAcquisitionCosts	12343000	USD
CY2016Q4	rnr	Deferred Tax Liabilities Depreciation And Amortization DeferredTaxLiabilitiesDepreciationAndAmortization	7097000	USD
CY2017Q4	rnr	Deferred Tax Liabilities Depreciation And Amortization DeferredTaxLiabilitiesDepreciationAndAmortization	3340000	USD
CY2016Q4	rnr	Deferred Tax Liabilities Equity Method Investments Available For Sale Investmentsand Derivatives DeferredTaxLiabilitiesEquityMethodInvestmentsAvailableForSaleInvestmentsandDerivatives	0	USD
CY2017Q4	rnr	Deferred Tax Liabilities Equity Method Investments Available For Sale Investmentsand Derivatives DeferredTaxLiabilitiesEquityMethodInvestmentsAvailableForSaleInvestmentsandDerivatives	1047000	USD
CY2015	rnr	Effective Income Tax Rate Reconciliation Deduction Business Acquisition Costs EffectiveIncomeTaxRateReconciliationDeductionBusinessAcquisitionCosts	3654000	USD
CY2016	rnr	Effective Income Tax Rate Reconciliation Deduction Business Acquisition Costs EffectiveIncomeTaxRateReconciliationDeductionBusinessAcquisitionCosts	-131000	USD
CY2017	rnr	Effective Income Tax Rate Reconciliation Deduction Business Acquisition Costs EffectiveIncomeTaxRateReconciliationDeductionBusinessAcquisitionCosts	0	USD
CY2015	rnr	Effective Income Tax Rate Reconciliation Non Taxable Foreign Exchange Gains Losses EffectiveIncomeTaxRateReconciliationNonTaxableForeignExchangeGainsLosses	-1897000	USD
CY2016	rnr	Effective Income Tax Rate Reconciliation Non Taxable Foreign Exchange Gains Losses EffectiveIncomeTaxRateReconciliationNonTaxableForeignExchangeGainsLosses	-1126000	USD
CY2017	rnr	Effective Income Tax Rate Reconciliation Non Taxable Foreign Exchange Gains Losses EffectiveIncomeTaxRateReconciliationNonTaxableForeignExchangeGainsLosses	2574000	USD
CY2015	rnr	Effective Income Tax Rate Reconciliation Withholding Tax EffectiveIncomeTaxRateReconciliationWithholdingTax	-3036000	USD
CY2016	rnr	Effective Income Tax Rate Reconciliation Withholding Tax EffectiveIncomeTaxRateReconciliationWithholdingTax	-2578000	USD
CY2017	rnr	Effective Income Tax Rate Reconciliation Withholding Tax EffectiveIncomeTaxRateReconciliationWithholdingTax	-216000	USD
CY2017Q4	rnr	Expected Amortizationof Other Intangible Assets ExpectedAmortizationofOtherIntangibleAssets	54471000	USD
CY2016Q4	rnr	Intangible Assets Excluding Goodwill Accumulated Amortization And Impairment IntangibleAssetsExcludingGoodwillAccumulatedAmortizationAndImpairment	82937000	USD
CY2017Q4	rnr	Intangible Assets Excluding Goodwill Accumulated Amortization And Impairment IntangibleAssetsExcludingGoodwillAccumulatedAmortizationAndImpairment	93924000	USD
CY2016Q4	rnr	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Additional Case Reserves Amount LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseAdditionalCaseReservesAmount	291727000	USD
CY2017Q4	rnr	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Additional Case Reserves Amount LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseAdditionalCaseReservesAmount	1021445000	USD
CY2015	rnr	Net Claims And Claim Expense Ratio Prior Years NetClaimsAndClaimExpenseRatioPriorYears	-0.116
CY2016	rnr	Net Claims And Claim Expense Ratio Prior Years NetClaimsAndClaimExpenseRatioPriorYears	-0.117
CY2017	rnr	Net Claims And Claim Expense Ratio Prior Years NetClaimsAndClaimExpenseRatioPriorYears	-0.024
CY2015	rnr	Net Claims And Claims Expense Ratio Current Year NetClaimsAndClaimsExpenseRatioCurrentYear	0.436
CY2016	rnr	Net Claims And Claims Expense Ratio Current Year NetClaimsAndClaimsExpenseRatioCurrentYear	0.495
CY2017	rnr	Net Claims And Claims Expense Ratio Current Year NetClaimsAndClaimsExpenseRatioCurrentYear	1.108
CY2015	rnr	Other Comprehensive Income Loss Adjustment For Net Realizedand Unrealized Holding Gains Losseson Investmentsand Net Other Than Temporary Impairments Portion Attributable To Parent OtherComprehensiveIncomeLossAdjustmentForNetRealizedandUnrealizedHoldingGainsLossesonInvestmentsandNetOtherThanTemporaryImpairmentsPortionAttributableToParent	-982000	USD
CY2016	rnr	Other Comprehensive Income Loss Adjustment For Net Realizedand Unrealized Holding Gains Losseson Investmentsand Net Other Than Temporary Impairments Portion Attributable To Parent OtherComprehensiveIncomeLossAdjustmentForNetRealizedandUnrealizedHoldingGainsLossesonInvestmentsandNetOtherThanTemporaryImpairmentsPortionAttributableToParent	403000	USD
CY2017	rnr	Other Comprehensive Income Loss Adjustment For Net Realizedand Unrealized Holding Gains Losseson Investmentsand Net Other Than Temporary Impairments Portion Attributable To Parent OtherComprehensiveIncomeLossAdjustmentForNetRealizedandUnrealizedHoldingGainsLossesonInvestmentsandNetOtherThanTemporaryImpairmentsPortionAttributableToParent	-909000	USD
CY2015	rnr	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	-15843000	USD
CY2016	rnr	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	68589000	USD
CY2017	rnr	Payments For Proceeds From Other Investments PaymentsForProceedsFromOtherInvestments	19419000	USD
CY2015	rnr	Payments For Proceeds From Other Short Term Investments PaymentsForProceedsFromOtherShortTermInvestments	-669116000	USD
CY2016	rnr	Payments For Proceeds From Other Short Term Investments PaymentsForProceedsFromOtherShortTermInvestments	118617000	USD
CY2017	rnr	Payments For Proceeds From Other Short Term Investments PaymentsForProceedsFromOtherShortTermInvestments	-364011000	USD
CY2017Q4	rnr	Preferred Stock Amount Of Preferred Dividends In Arrears Equivalent Number Of Periods Trigger PreferredStockAmountOfPreferredDividendsInArrearsEquivalentNumberOfPeriodsTrigger	6	period
CY2017Q4	rnr	Preferred Stock Preferred Stock Dividends In Arrears Triggered Shareholder Election Right Number Of Directors PreferredStockPreferredStockDividendsInArrearsTriggeredShareholderElectionRightNumberOfDirectors	2	director
CY2017Q4	rnr	Private Equity Partnerships And Other Entities Commitments Fulfilled PrivateEquityPartnershipsAndOtherEntitiesCommitmentsFulfilled	585200000	USD
CY2017Q4	rnr	Private Equity Partnerships And Other Entities Initial Commitments PrivateEquityPartnershipsAndOtherEntitiesInitialCommitments	1000000000	USD
CY2017Q4	rnr	Private Equity Partnerships And Other Entities Unfunded Commitments PrivateEquityPartnershipsAndOtherEntitiesUnfundedCommitments	429900000	USD
CY2017Q4	rnr	Securities Purchased Under Agreements To Resell Required Collateral Percentage Of Principal SecuritiesPurchasedUnderAgreementsToResellRequiredCollateralPercentageOfPrincipal	1.02
CY2017Q4	rnr	Shortduration Insurance Contracts Liabilityfor Unpaid Claimsand Claim Adjustment Expense Unamortized Fair Value Adjustments Associated With Acquisition ShortdurationInsuranceContractsLiabilityforUnpaidClaimsandClaimAdjustmentExpenseUnamortizedFairValueAdjustmentsAssociatedWithAcquisition	7434000	USD
CY2016Q4	rnr	Statutory Accounting Practices Statutory Capitaland Surplus Required Increase Decrease StatutoryAccountingPracticesStatutoryCapitalandSurplusRequiredIncreaseDecrease	-500000000	USD
CY2017Q4	rnr	Stock Shares Authorized StockSharesAuthorized	325000000	shares
CY2017Q4	rnr	Tax Cuts And Jobs Act Of2017 Change In Tax Rate Deferred Tax Asset TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxAsset	36700000	USD
CY2017Q4	rnr	Trading Securities Debt Maturities After Five Through Ten Years Amortized Cost Basis TradingSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCostBasis	997163000	USD
CY2017Q4	rnr	Trading Securities Debt Maturities After Five Through Ten Years Fair Value TradingSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1007656000	USD
CY2017Q4	rnr	Trading Securities Debt Maturities After One Through Five Years Amortized Cost Basis TradingSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCostBasis	4551757000	USD
CY2017Q4	rnr	Trading Securities Debt Maturities After One Through Five Years Fair Value TradingSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	4521930000	USD
CY2017Q4	rnr	Trading Securities Debt Maturities After Ten Years Amortized Cost Basis TradingSecuritiesDebtMaturitiesAfterTenYearsAmortizedCostBasis	163188000	USD
CY2017Q4	rnr	Trading Securities Debt Maturities After Ten Years Fair Value TradingSecuritiesDebtMaturitiesAfterTenYearsFairValue	165140000	USD
CY2017Q4	rnr	Trading Securities Debt Maturities Within One Year Amortized Cost Basis TradingSecuritiesDebtMaturitiesWithinOneYearAmortizedCostBasis	547468000	USD
CY2017Q4	rnr	Trading Securities Debt Maturities Within One Year Fair Value TradingSecuritiesDebtMaturitiesWithinOneYearFairValue	546255000	USD
CY2015	rnr	Underwriting Income Loss Net UnderwritingIncomeLossNet	494609000	USD
CY2016	rnr	Underwriting Income Loss Net UnderwritingIncomeLossNet	385527000	USD
CY2017	rnr	Underwriting Income Loss Net UnderwritingIncomeLossNet	-651523000	USD
CY2016Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	38076000	USD
CY2017Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	42235000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	1133000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	224000	USD
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	216558000	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	37355000	USD
CY2017Q4	us-gaap	Alternative Investments Fair Value Disclosure AlternativeInvestmentsFairValueDisclosure	214318000	USD
CY2016Q4	us-gaap	Assets Assets	12352082000	USD
CY2017Q4	us-gaap	Assets Assets	15226131000	USD
CY2016Q4	us-gaap	Assets Held By Insurance Regulators AssetsHeldByInsuranceRegulators	842600000	USD
CY2017Q4	us-gaap	Assets Held By Insurance Regulators AssetsHeldByInsuranceRegulators	1700000000	USD
CY2016Q4	us-gaap	Assets Held In Trust AssetsHeldInTrust	2700000000	USD
CY2017Q4	us-gaap	Assets Held In Trust AssetsHeldInTrust	4400000000	USD
CY2015	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	1769088000	USD
CY2016	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	1874993000	USD
CY2017	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	2307219000	USD
CY2015	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	1880629000	USD
CY2016	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	2166294000	USD
CY2017	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	2506810000	USD
CY2015	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	326000	USD
CY2016	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	1378000	USD
CY2017	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	0	USD
CY2015	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1018726000	USD
CY2016Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	267195000	USD
CY2016Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	304116000	USD
CY2016Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	255721000	USD
CY2016Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	270417000	USD
CY2016	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1097449000	USD
CY2017Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	339458000	USD
CY2017Q2	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	287331000	USD
CY2017Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1357206000	USD
CY2017Q4	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	447868000	USD
CY2017	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2431863000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	32109000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	3150000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	3336000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	3336000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	3336000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	3331000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	15620000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	525584000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	506885000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	421157000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1361592000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-18699000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-85728000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	940435000	USD
CY2015	us-gaap	Ceded Premiums Earned CededPremiumsEarned	466719000	USD
CY2016	us-gaap	Ceded Premiums Earned CededPremiumsEarned	628675000	USD
CY2017	us-gaap	Ceded Premiums Earned CededPremiumsEarned	833929000	USD
CY2015	us-gaap	Ceded Premiums Written CededPremiumsWritten	595127000	USD
CY2016	us-gaap	Ceded Premiums Written CededPremiumsWritten	839264000	USD
CY2017	us-gaap	Ceded Premiums Written CededPremiumsWritten	926215000	USD
CY2015	us-gaap	Combined Ratio CombinedRatio	0.647
CY2016	us-gaap	Combined Ratio CombinedRatio	0.725
CY2017	us-gaap	Combined Ratio CombinedRatio	1.379
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2015	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.2
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.24
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.28
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	225000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	41187413	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	40023789	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	41187413	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	40023789	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	41187000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	40024000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	429884000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	501987000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-223298000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	111050000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	127086000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-132282000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	540934000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	629073000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-355580000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	3471000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2090000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	844000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	989623000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-49337000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1750000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	25643000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	17546000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	16730000	USD
CY2015	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	238592000	USD
CY2016Q1	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	65592000	USD
CY2016Q2	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	69005000	USD
CY2016Q3	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	80580000	USD
CY2016Q4	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	74146000	USD
CY2016	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	289323000	USD
CY2017Q1	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	83282000	USD
CY2017Q2	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	88251000	USD
CY2017Q3	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	76761000	USD
CY2017Q4	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	98598000	USD
CY2017	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	346892000	USD
CY2016Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	335325000	USD
CY2017Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	426551000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	3407000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	116444000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	103439000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	80122000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	56693000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	51620000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	62643000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	26265000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	13992000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other Tax Carryforwards DeferredTaxAssetsOtherTaxCarryforwards	18408000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other Tax Carryforwards DeferredTaxAssetsOtherTaxCarryforwards	11320000	USD
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CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	2641000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	7496000	USD
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CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	18776000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	30016000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	2964000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Tax Deferred Income DeferredTaxLiabilitiesTaxDeferredIncome	0	USD
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	4300000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	4000000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	4400000	USD
CY2015	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	18179000	USD
CY2016	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	29304000	USD
CY2017	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	31242000	USD
CY2015	us-gaap	Direct Premiums Earned DirectPremiumsEarned	98182000	USD
CY2016	us-gaap	Direct Premiums Earned DirectPremiumsEarned	157112000	USD
CY2017	us-gaap	Direct Premiums Earned DirectPremiumsEarned	244285000	USD
CY2015	us-gaap	Direct Premiums Written DirectPremiumsWritten	130681000	USD
CY2016	us-gaap	Direct Premiums Written DirectPremiumsWritten	208282000	USD
CY2017	us-gaap	Direct Premiums Written DirectPremiumsWritten	290730000	USD
CY2015	us-gaap	Dividends Preferred Stock DividendsPreferredStock	22381000	USD
CY2016Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	5595000	USD
CY2016Q2	us-gaap	Dividends Preferred Stock DividendsPreferredStock	5596000	USD
CY2016Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	5595000	USD
CY2016Q4	us-gaap	Dividends Preferred Stock DividendsPreferredStock	5595000	USD
CY2016	us-gaap	Dividends Preferred Stock DividendsPreferredStock	22381000	USD
CY2017Q1	us-gaap	Dividends Preferred Stock DividendsPreferredStock	5595000	USD
CY2017Q2	us-gaap	Dividends Preferred Stock DividendsPreferredStock	5596000	USD
CY2017Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	5595000	USD
CY2017Q4	us-gaap	Dividends Preferred Stock DividendsPreferredStock	5595000	USD
CY2017	us-gaap	Dividends Preferred Stock DividendsPreferredStock	22381000	USD
CY2016Q4	us-gaap	Due From Related Parties DueFromRelatedParties	0	USD
CY2017Q4	us-gaap	Due From Related Parties DueFromRelatedParties	0	USD
CY2016Q4	us-gaap	Due To Affiliate Current And Noncurrent DueToAffiliateCurrentAndNoncurrent	0	USD
CY2017Q4	us-gaap	Due To Affiliate Current And Noncurrent DueToAffiliateCurrentAndNoncurrent	0	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	9.36
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.97
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CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.70
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	11.50
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.26
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.25
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CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-6.15
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CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.95
CY2017Q4	us-gaap	Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments	380483000	USD
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	13444000	USD
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.22
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.56
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.69
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	11.43
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.25
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.24
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-12.75
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-6.15
CY2015	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-10732000	USD
CY2016	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-4637000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	8222000	USD
CY2016Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	154048000	USD
CY2017Q4	us-gaap	Equity Method Investment Aggregate Cost EquityMethodInvestmentAggregateCost	143775000	USD
CY2015	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	13300000	USD
CY2016	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	9400000	USD
CY2017	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	29700000	USD
CY2016Q4	us-gaap	Equity Method Investments EquityMethodInvestments	124227000	USD
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	101974000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	0	USD
CY2016	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	7500000	USD
CY2015Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	1719000	USD
CY2016Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	-13004000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	10371000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	8323000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	5224000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	5612000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	6801000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	7873000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	44204000	USD
CY2015	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-3051000	USD
CY2016Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-1692000	USD
CY2016Q2	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-690000	USD
CY2016Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-5986000	USD
CY2016Q4	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-5420000	USD
CY2016	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-13788000	USD
CY2017Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	8165000	USD
CY2017Q2	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	3109000	USD
CY2017Q3	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-156000	USD
CY2017Q4	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-490000	USD
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	10628000	USD
CY2015	us-gaap	Gain Loss On Investments GainLossOnInvestments	-68918000	USD
CY2016Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	61653000	USD
CY2016Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	69772000	USD
CY2016Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	59870000	USD
CY2016Q4	us-gaap	Gain Loss On Investments GainLossOnInvestments	-49967000	USD
CY2016	us-gaap	Gain Loss On Investments GainLossOnInvestments	141328000	USD
CY2017Q1	us-gaap	Gain Loss On Investments GainLossOnInvestments	43373000	USD
CY2017Q2	us-gaap	Gain Loss On Investments GainLossOnInvestments	58113000	USD
CY2017Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	42052000	USD
CY2017Q4	us-gaap	Gain Loss On Investments GainLossOnInvestments	-7716000	USD
CY2017	us-gaap	Gain Loss On Investments GainLossOnInvestments	135822000	USD
CY2015	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	76514000	USD
CY2016Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	8225000	USD
CY2016Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	5752000	USD
CY2016Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	11537000	USD
CY2016Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	11888000	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	37402000	USD
CY2017Q1	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	5286000	USD
CY2017Q2	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	4636000	USD
CY2017Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	4413000	USD
CY2017Q4	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	4237000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	18572000	USD
CY2015	us-gaap	Gross Investment Income Operating GrossInvestmentIncomeOperating	166767000	USD
CY2016	us-gaap	Gross Investment Income Operating GrossInvestmentIncomeOperating	197147000	USD
CY2017	us-gaap	Gross Investment Income Operating GrossInvestmentIncomeOperating	237596000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	496376000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	180925000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	179168000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	186745000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	83550000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	630388000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	132608000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	218254000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-722471000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	43425000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-328184000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	496376000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	630388000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-328184000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	20481000	USD
CY2016Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1611000	USD
CY2016Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	6022000	USD
CY2016Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-11630000	USD
CY2016Q4	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	4960000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	963000	USD
CY2017Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1507000	USD
CY2017Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	5543000	USD
CY2017Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1794000	USD
CY2017Q4	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2200000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8030000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	10087000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-5504000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-6295000	USD
CY2015	us-gaap	Income Loss From Subsidiaries Net Of Tax IncomeLossFromSubsidiariesNetOfTax	0	USD
CY2016	us-gaap	Income Loss From Subsidiaries Net Of Tax IncomeLossFromSubsidiariesNetOfTax	0	USD
CY2017	us-gaap	Income Loss From Subsidiaries Net Of Tax IncomeLossFromSubsidiariesNetOfTax	0	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-45866000	USD
CY2016Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2744000	USD
CY2016Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6612000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-1316000	USD
CY2016Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7700000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	340000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	334000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3904000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-18977000	USD
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	41226000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26487000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-43808000	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	924000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	11718000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	38083000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-1011000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-4856000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-14216000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	2613000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	4924000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-2946000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	4939000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	4487000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3794000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10300000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1118000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	343000	USD
CY2015	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	89241000	USD
CY2016	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	135945000	USD
CY2017	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	91226000	USD
CY2015	us-gaap	Increase Decrease In Due To Related Parties IncreaseDecreaseInDueToRelatedParties	0	USD
CY2016	us-gaap	Increase Decrease In Due To Related Parties IncreaseDecreaseInDueToRelatedParties	0	USD
CY2017	us-gaap	Increase Decrease In Due To Related Parties IncreaseDecreaseInDueToRelatedParties	0	USD
CY2015	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-13140000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-99943000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-538100000	USD
CY2015	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	105281000	USD
CY2016	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	209314000	USD
CY2017	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	317299000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	128410000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	210589000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	92286000	USD
CY2015	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	64924000	USD
CY2016	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	150009000	USD
CY2017	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	315107000	USD
CY2015	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	64104000	USD
CY2016	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	145038000	USD
CY2017	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	1307066000	USD
CY2015	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	144040000	USD
CY2016	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	342471000	USD
CY2017	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	246036000	USD
CY2015	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-15632000	USD
CY2016Q1	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-158069000	USD
CY2016Q2	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-168514000	USD
CY2016Q3	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	62299000	USD
CY2016Q4	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	132402000	USD
CY2016	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-131882000	USD
CY2017Q1	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-178091000	USD
CY2017Q2	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-173480000	USD
CY2017Q3	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	64571000	USD
CY2017Q4	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	133250000	USD
CY2017	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-153750000	USD
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	369000	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	245000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2017Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	10267000	USD
CY2016Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	148395000	USD
CY2017Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	148395000	USD
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	65458000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	54471000	USD
CY2016Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	251186000	USD
CY2017Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	243145000	USD
CY2015	us-gaap	Interest Expense InterestExpense	36270000	USD
CY2016Q1	us-gaap	Interest Expense InterestExpense	10538000	USD
CY2016Q2	us-gaap	Interest Expense InterestExpense	10536000	USD
CY2016Q3	us-gaap	Interest Expense InterestExpense	10536000	USD
CY2016Q4	us-gaap	Interest Expense InterestExpense	10534000	USD
CY2016	us-gaap	Interest Expense InterestExpense	42144000	USD
CY2017Q1	us-gaap	Interest Expense InterestExpense	10526000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	10091000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	11799000	USD
CY2017Q4	us-gaap	Interest Expense InterestExpense	11777000	USD
CY2017	us-gaap	Interest Expense InterestExpense	44193000	USD
CY2015	us-gaap	Interest Paid InterestPaid	40755000	USD
CY2016	us-gaap	Interest Paid InterestPaid	53977000	USD
CY2017	us-gaap	Interest Paid InterestPaid	44171000	USD
CY2015	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	14200000	USD
CY2016	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	15421000	USD
CY2017	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	15387000	USD
CY2016Q4	us-gaap	Investments Investments	9316968000	USD
CY2017Q4	us-gaap	Investments Investments	9503439000	USD
CY2016Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2017Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2016Q4	us-gaap	Liabilities Liabilities	6309911000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	9538250000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	12352082000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	15226131000	USD
CY2015Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	2767045000	USD
CY2016Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	2848294000	USD
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	5080408000	USD
CY2015	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions	1394117000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions	0	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions	0	USD
CY2015	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	95747000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	83015000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	450527000	USD
CY2015	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	425565000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	506279000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	524298000	USD
CY2015	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss	-34340000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss	-5326000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss	38445000	USD
CY2016Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred But Not Reported Ibnr Claims Amount LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount	1742973000	USD
CY2017Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred But Not Reported Ibnr Claims Amount LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount	2666111000	USD
CY2015	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	448238000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	530831000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	1861428000	USD
CY2014Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1345816000	USD
CY2015Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	2632519000	USD
CY2016Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	2568730000	USD
CY2017Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	3493778000	USD
CY2015	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Period Increase Decrease LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease	43310000	USD
CY2016	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Period Increase Decrease LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease	-81249000	USD
CY2017	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Period Increase Decrease LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease	-2232114000	USD
CY2016Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Reported Claims Amount LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount	813594000	USD
CY2017Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Reported Claims Amount LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount	1392852000	USD
CY2017Q4	us-gaap	Line Of Credit LineOfCredit	10000000	GBP
CY2017Q4	us-gaap	Line Of Credit LineOfCredit	487857000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	948663000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	989623000	USD
CY2016Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	964800000	USD
CY2017Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	1018200000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	750000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	0	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	250000000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	0	USD
CY2015	us-gaap	Loss Ratio LossRatio	0.320
CY2016	us-gaap	Loss Ratio LossRatio	0.378
CY2017	us-gaap	Loss Ratio LossRatio	1.084
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-93913000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-401331000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	28860000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-339039000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-164532000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-142434000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	424985000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	484772000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1045787000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	431192000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	133590000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	141921000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	152420000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	75031000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	502962000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	97947000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	176738000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	-499217000	USD

CY2017

us-gaap

Unrealized Gain Loss On Securities

UnrealizedGainLossOnSecurities

0

USD

CY2017

dei

Amendment Flag

AmendmentFlag

false

CY2017

dei

Current Fiscal Year End Date

CurrentFiscalYearEndDate

--12-31

CY2017

dei

Document Fiscal Period Focus

DocumentFiscalPeriodFocus

FY

CY2017

dei

Document Fiscal Year Focus

DocumentFiscalYearFocus

2017

CY2017

dei

Document Period End Date

DocumentPeriodEndDate

2017-12-31

CY2017

dei

Document Type

DocumentType

10-K

CY2017

dei

Entity Central Index Key

EntityCentralIndexKey

0000913144

CY2018Q1

dei

Entity Common Stock Shares Outstanding

EntityCommonStockSharesOutstanding

40023789

shares

CY2017

dei

Entity Current Reporting Status

EntityCurrentReportingStatus

Yes

CY2017

dei

Entity Filer Category

EntityFilerCategory

Large Accelerated Filer

CY2017Q2

dei

Entity Public Float

EntityPublicFloat

5498000000

USD

CY2017

dei

Entity Registrant Name

EntityRegistrantName

RENAISSANCERE HOLDINGS LTD.

CY2017

dei

Entity Voluntary Filers

EntityVoluntaryFilers

No

CY2017

dei

Entity Well Known Seasoned Issuer

EntityWellKnownSeasonedIssuer

Yes

CY2017

dei

Trading Symbol

TradingSymbol

RNR

CY2017

rnr

Capital Lease Term

CapitalLeaseTerm

P20Y

CY2017

rnr

Capital Lease Term Renewal Option

CapitalLeaseTermRenewalOption

P30Y

CY2017Q4

rnr

Debt Instrument Unamortized Debt Discount And Issuance Expense

DebtInstrumentUnamortizedDebtDiscountAndIssuanceExpense

10377000

USD

CY2016Q4

rnr

Deferred Tax Asset Liability Before Valuation Allowance Net

DeferredTaxAssetLiabilityBeforeValuationAllowanceNet

98898000

USD

CY2017Q4

rnr

Deferred Tax Asset Liability Before Valuation Allowance Net

DeferredTaxAssetLiabilityBeforeValuationAllowanceNet

86709000

USD

CY2016Q4

rnr

Deferred Tax Assets Equity Method Investments Available For Sale Investmentsand Derivatives

DeferredTaxAssetsEquityMethodInvestmentsAvailableForSaleInvestmentsandDerivatives

3269000

USD

CY2017Q4

rnr

Deferred Tax Assets Equity Method Investments Available For Sale Investmentsand Derivatives

DeferredTaxAssetsEquityMethodInvestmentsAvailableForSaleInvestmentsandDerivatives

0

USD

CY2016Q4

rnr

Deferred Tax Liabilities Deferred Expense Deferred Acquisition Costs

DeferredTaxLiabilitiesDeferredExpenseDeferredAcquisitionCosts

7485000

USD

CY2017Q4

rnr

Deferred Tax Liabilities Deferred Expense Deferred Acquisition Costs

DeferredTaxLiabilitiesDeferredExpenseDeferredAcquisitionCosts

12343000

USD

CY2016Q4

rnr

Deferred Tax Liabilities Depreciation And Amortization

DeferredTaxLiabilitiesDepreciationAndAmortization

7097000

USD

CY2017Q4

rnr

Deferred Tax Liabilities Depreciation And Amortization

DeferredTaxLiabilitiesDepreciationAndAmortization

3340000

USD

CY2016Q4

rnr

Deferred Tax Liabilities Equity Method Investments Available For Sale Investmentsand Derivatives

DeferredTaxLiabilitiesEquityMethodInvestmentsAvailableForSaleInvestmentsandDerivatives

0

USD

CY2017Q4

rnr

Deferred Tax Liabilities Equity Method Investments Available For Sale Investmentsand Derivatives

DeferredTaxLiabilitiesEquityMethodInvestmentsAvailableForSaleInvestmentsandDerivatives

1047000

USD

CY2015

rnr

Effective Income Tax Rate Reconciliation Deduction Business Acquisition Costs

EffectiveIncomeTaxRateReconciliationDeductionBusinessAcquisitionCosts

3654000

USD

CY2016

rnr

Effective Income Tax Rate Reconciliation Deduction Business Acquisition Costs

EffectiveIncomeTaxRateReconciliationDeductionBusinessAcquisitionCosts

-131000

USD

CY2017

rnr

Effective Income Tax Rate Reconciliation Deduction Business Acquisition Costs

EffectiveIncomeTaxRateReconciliationDeductionBusinessAcquisitionCosts

0

USD

CY2015

rnr

Effective Income Tax Rate Reconciliation Non Taxable Foreign Exchange Gains Losses

EffectiveIncomeTaxRateReconciliationNonTaxableForeignExchangeGainsLosses

-1897000

USD

CY2016

rnr

Effective Income Tax Rate Reconciliation Non Taxable Foreign Exchange Gains Losses

EffectiveIncomeTaxRateReconciliationNonTaxableForeignExchangeGainsLosses

-1126000

USD

CY2017

rnr

Effective Income Tax Rate Reconciliation Non Taxable Foreign Exchange Gains Losses

EffectiveIncomeTaxRateReconciliationNonTaxableForeignExchangeGainsLosses

2574000

USD

CY2015

rnr

Effective Income Tax Rate Reconciliation Withholding Tax

EffectiveIncomeTaxRateReconciliationWithholdingTax

-3036000

USD

CY2016

rnr

Effective Income Tax Rate Reconciliation Withholding Tax

EffectiveIncomeTaxRateReconciliationWithholdingTax

-2578000

USD

CY2017

rnr

Effective Income Tax Rate Reconciliation Withholding Tax

EffectiveIncomeTaxRateReconciliationWithholdingTax

-216000

USD

CY2017Q4

rnr

Expected Amortizationof Other Intangible Assets

ExpectedAmortizationofOtherIntangibleAssets

54471000

USD

CY2016Q4

rnr

Intangible Assets Excluding Goodwill Accumulated Amortization And Impairment

IntangibleAssetsExcludingGoodwillAccumulatedAmortizationAndImpairment

82937000

USD

CY2017Q4

rnr

Intangible Assets Excluding Goodwill Accumulated Amortization And Impairment

IntangibleAssetsExcludingGoodwillAccumulatedAmortizationAndImpairment

93924000

USD

CY2016Q4

rnr

Liabilityfor Unpaid Claimsand Claims Adjustment Expense Additional Case Reserves Amount

LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseAdditionalCaseReservesAmount

291727000

USD

CY2017Q4

rnr

Liabilityfor Unpaid Claimsand Claims Adjustment Expense Additional Case Reserves Amount

LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseAdditionalCaseReservesAmount

1021445000

USD

CY2015

rnr

Net Claims And Claim Expense Ratio Prior Years

NetClaimsAndClaimExpenseRatioPriorYears

-0.116

CY2016

rnr

Net Claims And Claim Expense Ratio Prior Years

NetClaimsAndClaimExpenseRatioPriorYears

-0.117

CY2017

rnr

Net Claims And Claim Expense Ratio Prior Years

NetClaimsAndClaimExpenseRatioPriorYears

-0.024

CY2015

rnr

Net Claims And Claims Expense Ratio Current Year

NetClaimsAndClaimsExpenseRatioCurrentYear

0.436

CY2016

rnr

Net Claims And Claims Expense Ratio Current Year

NetClaimsAndClaimsExpenseRatioCurrentYear

0.495

CY2017

rnr

Net Claims And Claims Expense Ratio Current Year

NetClaimsAndClaimsExpenseRatioCurrentYear

1.108

CY2015

rnr

Other Comprehensive Income Loss Adjustment For Net Realizedand Unrealized Holding Gains Losseson Investmentsand Net Other Than Temporary Impairments Portion Attributable To Parent

OtherComprehensiveIncomeLossAdjustmentForNetRealizedandUnrealizedHoldingGainsLossesonInvestmentsandNetOtherThanTemporaryImpairmentsPortionAttributableToParent

-982000

USD

CY2016

rnr

Other Comprehensive Income Loss Adjustment For Net Realizedand Unrealized Holding Gains Losseson Investmentsand Net Other Than Temporary Impairments Portion Attributable To Parent

OtherComprehensiveIncomeLossAdjustmentForNetRealizedandUnrealizedHoldingGainsLossesonInvestmentsandNetOtherThanTemporaryImpairmentsPortionAttributableToParent

403000

USD

CY2017

rnr

Other Comprehensive Income Loss Adjustment For Net Realizedand Unrealized Holding Gains Losseson Investmentsand Net Other Than Temporary Impairments Portion Attributable To Parent

OtherComprehensiveIncomeLossAdjustmentForNetRealizedandUnrealizedHoldingGainsLossesonInvestmentsandNetOtherThanTemporaryImpairmentsPortionAttributableToParent

-909000

USD

CY2015

rnr

Payments For Proceeds From Other Investments

PaymentsForProceedsFromOtherInvestments

-15843000

USD

CY2016

rnr

Payments For Proceeds From Other Investments

PaymentsForProceedsFromOtherInvestments

68589000

USD

CY2017

rnr

Payments For Proceeds From Other Investments

PaymentsForProceedsFromOtherInvestments

19419000

USD

CY2015

rnr

Payments For Proceeds From Other Short Term Investments

PaymentsForProceedsFromOtherShortTermInvestments

-669116000

USD

CY2016

rnr

Payments For Proceeds From Other Short Term Investments

PaymentsForProceedsFromOtherShortTermInvestments

118617000

USD

CY2017

rnr

Payments For Proceeds From Other Short Term Investments

PaymentsForProceedsFromOtherShortTermInvestments

-364011000

USD

CY2017Q4

rnr

Preferred Stock Amount Of Preferred Dividends In Arrears Equivalent Number Of Periods Trigger

PreferredStockAmountOfPreferredDividendsInArrearsEquivalentNumberOfPeriodsTrigger

6

period

CY2017Q4

rnr

Preferred Stock Preferred Stock Dividends In Arrears Triggered Shareholder Election Right Number Of Directors

PreferredStockPreferredStockDividendsInArrearsTriggeredShareholderElectionRightNumberOfDirectors

2

director

CY2017Q4

rnr

Private Equity Partnerships And Other Entities Commitments Fulfilled

PrivateEquityPartnershipsAndOtherEntitiesCommitmentsFulfilled

585200000

USD

CY2017Q4

rnr

Private Equity Partnerships And Other Entities Initial Commitments

PrivateEquityPartnershipsAndOtherEntitiesInitialCommitments

1000000000

USD

CY2017Q4

rnr

Private Equity Partnerships And Other Entities Unfunded Commitments

PrivateEquityPartnershipsAndOtherEntitiesUnfundedCommitments

429900000

USD

CY2017Q4

rnr

Securities Purchased Under Agreements To Resell Required Collateral Percentage Of Principal

SecuritiesPurchasedUnderAgreementsToResellRequiredCollateralPercentageOfPrincipal

1.02

CY2017Q4

rnr

Shortduration Insurance Contracts Liabilityfor Unpaid Claimsand Claim Adjustment Expense Unamortized Fair Value Adjustments Associated With Acquisition

ShortdurationInsuranceContractsLiabilityforUnpaidClaimsandClaimAdjustmentExpenseUnamortizedFairValueAdjustmentsAssociatedWithAcquisition

7434000

USD

CY2016Q4

rnr

Statutory Accounting Practices Statutory Capitaland Surplus Required Increase Decrease

StatutoryAccountingPracticesStatutoryCapitalandSurplusRequiredIncreaseDecrease

-500000000

USD

CY2017Q4

rnr

Stock Shares Authorized

StockSharesAuthorized

325000000

shares

CY2017Q4

rnr

Tax Cuts And Jobs Act Of2017 Change In Tax Rate Deferred Tax Asset

TaxCutsAndJobsActOf2017ChangeInTaxRateDeferredTaxAsset

36700000

USD

CY2017Q4

rnr

Trading Securities Debt Maturities After Five Through Ten Years Amortized Cost Basis

TradingSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCostBasis

997163000

USD

CY2017Q4

rnr

Trading Securities Debt Maturities After Five Through Ten Years Fair Value

TradingSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

1007656000

USD

CY2017Q4

rnr

Trading Securities Debt Maturities After One Through Five Years Amortized Cost Basis

TradingSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCostBasis

4551757000

USD

CY2017Q4

rnr

Trading Securities Debt Maturities After One Through Five Years Fair Value

TradingSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

4521930000

USD

CY2017Q4

rnr

Trading Securities Debt Maturities After Ten Years Amortized Cost Basis

TradingSecuritiesDebtMaturitiesAfterTenYearsAmortizedCostBasis

163188000

USD

CY2017Q4

rnr

Trading Securities Debt Maturities After Ten Years Fair Value

TradingSecuritiesDebtMaturitiesAfterTenYearsFairValue

165140000

USD

CY2017Q4

rnr

Trading Securities Debt Maturities Within One Year Amortized Cost Basis

TradingSecuritiesDebtMaturitiesWithinOneYearAmortizedCostBasis

547468000

USD

CY2017Q4

rnr

Trading Securities Debt Maturities Within One Year Fair Value

TradingSecuritiesDebtMaturitiesWithinOneYearFairValue

546255000

USD

CY2015

rnr

Underwriting Income Loss Net

UnderwritingIncomeLossNet

494609000

USD

CY2016

rnr

Underwriting Income Loss Net

UnderwritingIncomeLossNet

385527000

USD

CY2017

rnr

Underwriting Income Loss Net

UnderwritingIncomeLossNet

-651523000

USD

CY2016Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

38076000

USD

CY2017Q4

us-gaap

Accrued Investment Income Receivable

AccruedInvestmentIncomeReceivable

42235000

USD

CY2016Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

1133000

USD

CY2017Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

224000

USD

CY2016Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

216558000

USD

CY2017Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

37355000

USD

CY2017Q4

us-gaap

Alternative Investments Fair Value Disclosure

AlternativeInvestmentsFairValueDisclosure

214318000

USD

CY2016Q4

us-gaap

Assets

12352082000

USD

CY2017Q4

us-gaap

Assets

15226131000

USD

CY2016Q4

us-gaap

Assets Held By Insurance Regulators

AssetsHeldByInsuranceRegulators

842600000

USD

CY2017Q4

us-gaap

Assets Held By Insurance Regulators

AssetsHeldByInsuranceRegulators

1700000000

USD

CY2016Q4

us-gaap

Assets Held In Trust

AssetsHeldInTrust

2700000000

USD

CY2017Q4

us-gaap

Assets Held In Trust

AssetsHeldInTrust

4400000000

USD

CY2015

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

1769088000

USD

CY2016

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

1874993000

USD

CY2017

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

2307219000

USD

CY2015

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

1880629000

USD

CY2016

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

2166294000

USD

CY2017

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

2506810000

USD

CY2015

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

326000

USD

CY2016

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

1378000

USD

CY2017

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

0

USD

CY2015

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

1018726000

USD

CY2016Q1

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

267195000

USD

CY2016Q2

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

304116000

USD

CY2016Q3

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

255721000

USD

CY2016Q4

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

270417000

USD

CY2016

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

1097449000

USD

CY2017Q1

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

339458000

USD

CY2017Q2

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

287331000

USD

CY2017Q3

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

1357206000

USD

CY2017Q4

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

447868000

USD

CY2017

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

2431863000

USD

CY2017Q4

us-gaap

Capital Leases Future Minimum Payments Due

CapitalLeasesFutureMinimumPaymentsDue

32109000

USD

CY2017Q4

us-gaap

Capital Leases Future Minimum Payments Due Current

CapitalLeasesFutureMinimumPaymentsDueCurrent

3150000

USD

CY2017Q4

us-gaap

Capital Leases Future Minimum Payments Due In Five Years

CapitalLeasesFutureMinimumPaymentsDueInFiveYears

3336000

USD

CY2017Q4

us-gaap

Capital Leases Future Minimum Payments Due In Four Years

CapitalLeasesFutureMinimumPaymentsDueInFourYears

3336000

USD

CY2017Q4

us-gaap

Capital Leases Future Minimum Payments Due In Three Years

CapitalLeasesFutureMinimumPaymentsDueInThreeYears

3336000

USD

CY2017Q4

us-gaap

Capital Leases Future Minimum Payments Due In Two Years

CapitalLeasesFutureMinimumPaymentsDueInTwoYears

3331000

USD

CY2017Q4

us-gaap

Capital Leases Future Minimum Payments Due Thereafter

CapitalLeasesFutureMinimumPaymentsDueThereafter

15620000

USD

CY2014Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

525584000

USD

CY2015Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

506885000

USD

CY2016Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

421157000

USD

CY2017Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

1361592000

USD

CY2015

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-18699000

USD

CY2016

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-85728000

USD

CY2017

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

940435000

USD

CY2015

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

466719000

USD

CY2016

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

628675000

USD

CY2017

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

833929000

USD

CY2015

us-gaap

Ceded Premiums Written

CededPremiumsWritten

595127000

USD

CY2016

us-gaap

Ceded Premiums Written

CededPremiumsWritten

839264000

USD

CY2017

us-gaap

Ceded Premiums Written

CededPremiumsWritten

926215000

USD

CY2015

us-gaap

Combined Ratio

CombinedRatio

0.647

CY2016

us-gaap

Combined Ratio

CombinedRatio

0.725

CY2017

us-gaap

Combined Ratio

CombinedRatio

1.379

CY2016Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2017Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2015

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1.2

CY2016

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1.24

CY2017

us-gaap

Common Stock Dividends Per Share Declared

CommonStockDividendsPerShareDeclared

1.28

CY2016Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

1

CY2017Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

1

CY2017Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

225000000

shares

CY2016Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

41187413

shares

CY2017Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

40023789

shares

CY2016Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

41187413

shares

CY2017Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

40023789

shares

CY2016Q4

us-gaap

Common Stock Value

CommonStockValue

41187000

USD

CY2017Q4

us-gaap

Common Stock Value

CommonStockValue

40024000

USD

CY2015

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

429884000

USD

CY2016

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

501987000

USD

CY2017

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-223298000

USD

CY2015

us-gaap

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

111050000

USD

CY2016

us-gaap

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

127086000

USD

CY2017

us-gaap

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

-132282000

USD

CY2015

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

540934000

USD

CY2016

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

629073000

USD

CY2017

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

-355580000

USD

CY2015

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

3471000

USD

CY2016

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

2090000

USD

CY2017

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

844000

USD

CY2017Q4

us-gaap

Debt Instrument Carrying Amount

DebtInstrumentCarryingAmount

989623000

USD

CY2015

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-49337000

USD

CY2016

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-1750000

USD

CY2017

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

25643000

USD

CY2016Q4

us-gaap

Deferred Income Tax Liabilities

DeferredIncomeTaxLiabilities

17546000

USD

CY2017Q4

us-gaap

Deferred Income Tax Liabilities

DeferredIncomeTaxLiabilities

16730000

USD

CY2015

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

238592000

USD

CY2016Q1

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

65592000

USD

CY2016Q2

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

69005000

USD

CY2016Q3

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

80580000

USD

CY2016Q4

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

74146000

USD

CY2016

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

289323000

USD

CY2017Q1

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

83282000

USD

CY2017Q2

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

88251000

USD

CY2017Q3

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

76761000

USD

CY2017Q4

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

98598000

USD

CY2017

us-gaap

Deferred Policy Acquisition Cost Amortization Expense

DeferredPolicyAcquisitionCostAmortizationExpense

346892000

USD

CY2016Q4

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

335325000

USD

CY2017Q4

us-gaap

Deferred Policy Acquisition Costs

DeferredPolicyAcquisitionCosts

426551000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Deferred Income

DeferredTaxAssetsDeferredIncome

0

USD

CY2017Q4

us-gaap

Deferred Tax Assets Deferred Income

DeferredTaxAssetsDeferredIncome

3407000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Gross

DeferredTaxAssetsGross

116444000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Gross

DeferredTaxAssetsGross

103439000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Liabilities Net

DeferredTaxAssetsLiabilitiesNet

80122000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Liabilities Net

DeferredTaxAssetsLiabilitiesNet

56693000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Operating Loss Carryforwards

DeferredTaxAssetsOperatingLossCarryforwards

51620000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Operating Loss Carryforwards

DeferredTaxAssetsOperatingLossCarryforwards

62643000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Other

DeferredTaxAssetsOther

26265000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Other

DeferredTaxAssetsOther

13992000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Other Tax Carryforwards

DeferredTaxAssetsOtherTaxCarryforwards

18408000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Other Tax Carryforwards

DeferredTaxAssetsOtherTaxCarryforwards

11320000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

9386000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

2641000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve

7496000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve

9436000

USD

CY2016Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

18776000

USD

CY2017Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

30016000

USD

CY2016Q4

us-gaap

Deferred Tax Liabilities Tax Deferred Income

DeferredTaxLiabilitiesTaxDeferredIncome

2964000

USD

CY2017Q4

us-gaap

Deferred Tax Liabilities Tax Deferred Income

DeferredTaxLiabilitiesTaxDeferredIncome

0

USD

CY2015

us-gaap

Defined Contribution Plan Cost Recognized

DefinedContributionPlanCostRecognized

4300000

USD

CY2016

us-gaap

Defined Contribution Plan Cost Recognized

DefinedContributionPlanCostRecognized

4000000

USD

CY2017

us-gaap

Defined Contribution Plan Cost Recognized

DefinedContributionPlanCostRecognized

4400000

USD

CY2015

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

18179000

USD

CY2016

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

29304000

USD

CY2017

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

31242000

USD

CY2015

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

98182000

USD

CY2016

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

157112000

USD

CY2017

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

244285000

USD

CY2015

us-gaap

Direct Premiums Written

DirectPremiumsWritten

130681000

USD

CY2016

us-gaap

Direct Premiums Written

DirectPremiumsWritten

208282000

USD

CY2017

us-gaap

Direct Premiums Written

DirectPremiumsWritten

290730000

USD

CY2015

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

22381000

USD

CY2016Q1

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

5595000

USD

CY2016Q2

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

5596000

USD

CY2016Q3

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

5595000

USD

CY2016Q4

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

5595000

USD

CY2016

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

22381000

USD

CY2017Q1

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

5595000

USD

CY2017Q2

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

5596000

USD

CY2017Q3

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

5595000

USD

CY2017Q4

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

5595000

USD

CY2017

us-gaap

Dividends Preferred Stock

DividendsPreferredStock

22381000

USD

CY2016Q4

us-gaap

Due From Related Parties

DueFromRelatedParties

0

USD

CY2017Q4

us-gaap

Due From Related Parties

DueFromRelatedParties

0

USD

CY2016Q4

us-gaap

Due To Affiliate Current And Noncurrent

DueToAffiliateCurrentAndNoncurrent

0

USD

CY2017Q4

us-gaap

Due To Affiliate Current And Noncurrent

DueToAffiliateCurrentAndNoncurrent

0

USD

CY2015

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

9.36

CY2016Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

2.97

CY2016Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

3.23

CY2016Q3

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

3.58

CY2016Q4

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.70

CY2016

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

11.50

CY2017Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

2.26

CY2017Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

4.25

CY2017Q3

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-12.75

CY2017Q4

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-0.09

CY2017

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-6.15

CY2015

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

9.28

CY2016Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

2.95

CY2017Q4

us-gaap

Fair Value Investments Entities That Calculate Net Asset Value Per Share Unfunded Committments

FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments

380483000

USD

CY2016

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

13444000

USD

CY2016Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

3.22

CY2016Q3

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

3.56

CY2016Q4

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.69

CY2016

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

11.43

CY2017Q1

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

2.25

CY2017Q2

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

4.24

CY2017Q3

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-12.75

CY2017Q4

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-0.09

CY2017

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-6.15

CY2015

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

-10732000

USD

CY2016

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

-4637000

USD

CY2017

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

8222000

USD

CY2016Q4

us-gaap

Equity Method Investment Aggregate Cost

EquityMethodInvestmentAggregateCost

154048000

USD

CY2017Q4

us-gaap

Equity Method Investment Aggregate Cost

EquityMethodInvestmentAggregateCost

143775000

USD

CY2015

us-gaap

Equity Method Investment Dividends Or Distributions

EquityMethodInvestmentDividendsOrDistributions

13300000

USD

CY2016

us-gaap

Equity Method Investment Dividends Or Distributions

EquityMethodInvestmentDividendsOrDistributions

9400000

USD

CY2017

us-gaap

Equity Method Investment Dividends Or Distributions

EquityMethodInvestmentDividendsOrDistributions

29700000

USD

CY2016Q4

us-gaap

Equity Method Investments

EquityMethodInvestments

124227000

USD

CY2017Q4

us-gaap

Equity Method Investments

EquityMethodInvestments

101974000

USD

CY2017

us-gaap

Excess Tax Benefit From Share Based Compensation Operating Activities

ExcessTaxBenefitFromShareBasedCompensationOperatingActivities

0

USD

CY2016

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

7500000

USD

CY2015Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

1719000

USD

CY2016Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

-13004000

USD

CY2017Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense After Year Five

FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

10371000

USD

CY2017Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Next Twelve Months

FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

8323000

USD

CY2017Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Five

FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

5224000

USD

CY2017Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Four

FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

5612000

USD

CY2017Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Three

FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

6801000

USD

CY2017Q4

us-gaap

Finite Lived Intangible Assets Amortization Expense Year Two

FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

7873000

USD

CY2017Q4

us-gaap

Finite Lived Intangible Assets Net

FiniteLivedIntangibleAssetsNet

44204000

USD

CY2015

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-3051000

USD

CY2016Q1

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-1692000

USD

CY2016Q2

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-690000

USD

CY2016Q3

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-5986000

USD

CY2016Q4

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-5420000

USD

CY2016

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-13788000

USD

CY2017Q1

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

8165000

USD

CY2017Q2

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

3109000

USD

CY2017Q3

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-156000

USD

CY2017Q4

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-490000

USD

CY2017

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

10628000

USD

CY2015

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-68918000

USD

CY2016Q1

us-gaap

Gain Loss On Investments

GainLossOnInvestments

61653000

USD

CY2016Q2

us-gaap

Gain Loss On Investments

GainLossOnInvestments

69772000

USD

CY2016Q3

us-gaap

Gain Loss On Investments

GainLossOnInvestments

59870000

USD

CY2016Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-49967000

USD

CY2016

us-gaap

Gain Loss On Investments

GainLossOnInvestments

141328000

USD

CY2017Q1

us-gaap

Gain Loss On Investments

GainLossOnInvestments

43373000

USD

CY2017Q2

us-gaap

Gain Loss On Investments

GainLossOnInvestments

58113000

USD

CY2017Q3

us-gaap

Gain Loss On Investments

GainLossOnInvestments

42052000

USD

CY2017Q4

us-gaap

Gain Loss On Investments

GainLossOnInvestments

-7716000

USD

CY2017

us-gaap

Gain Loss On Investments

GainLossOnInvestments

135822000

USD

CY2015

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

76514000

USD

CY2016Q1

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

8225000

USD

CY2016Q2

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

5752000

USD

CY2016Q3

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

11537000

USD

CY2016Q4

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

11888000

USD

CY2016

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

37402000

USD

CY2017Q1

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

5286000

USD

CY2017Q2

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

4636000

USD

CY2017Q3

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

4413000

USD

CY2017Q4

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

4237000

USD

CY2017

us-gaap

General And Administrative Expense

GeneralAndAdministrativeExpense

18572000

USD

CY2015

us-gaap

Gross Investment Income Operating

GrossInvestmentIncomeOperating

166767000

USD

CY2016

us-gaap

Gross Investment Income Operating

GrossInvestmentIncomeOperating

197147000

USD

CY2017

us-gaap

Gross Investment Income Operating

GrossInvestmentIncomeOperating

237596000

USD

CY2015

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

496376000

USD

CY2016Q1

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

180925000

USD

CY2016Q2

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

179168000

USD

CY2016Q3

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

186745000

USD

CY2016Q4

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

83550000

USD

CY2016

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

630388000

USD

CY2017Q1

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

132608000

USD

CY2017Q2

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

218254000

USD

CY2017Q3

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-722471000

USD

CY2017Q4

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

43425000

USD

CY2017

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

-328184000

USD

CY2015

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

496376000

USD

CY2016

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

630388000

USD

CY2017

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

-328184000

USD

CY2015

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

20481000

USD

CY2016Q1

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

1611000

USD

CY2016Q2

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

6022000

USD

CY2016Q3

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

-11630000

USD

CY2016Q4

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

4960000

USD

CY2016

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

963000

USD

CY2017Q1

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

-1507000

USD

CY2017Q2

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

5543000

USD

CY2017Q3

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

1794000

USD

CY2017Q4

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

2200000

USD

CY2017

us-gaap

Income Loss From Equity Method Investments

IncomeLossFromEquityMethodInvestments

8030000

USD

CY2015

us-gaap

Income Loss From Equity Method Investments Net Of Dividends Or Distributions

IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions

10087000

USD

CY2016

us-gaap

Income Loss From Equity Method Investments Net Of Dividends Or Distributions

IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions

-5504000

USD

CY2017

us-gaap

Income Loss From Equity Method Investments Net Of Dividends Or Distributions

IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions

-6295000

USD

CY2015

us-gaap

Income Loss From Subsidiaries Net Of Tax

IncomeLossFromSubsidiariesNetOfTax

0

USD

CY2016

us-gaap

Income Loss From Subsidiaries Net Of Tax

IncomeLossFromSubsidiariesNetOfTax

0

USD

CY2017

us-gaap

Income Loss From Subsidiaries Net Of Tax

IncomeLossFromSubsidiariesNetOfTax

0

USD

CY2015

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-45866000

USD

CY2016Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

2744000

USD

CY2016Q2

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

6612000

USD

CY2016Q3

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-1316000

USD

CY2016Q4

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-7700000

USD

CY2016

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

340000

USD

CY2017Q1

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

334000

USD

CY2017Q2

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

3904000

USD

CY2017Q3

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

-18977000

USD

CY2017Q4

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

41226000

USD

CY2017

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

26487000

USD

CY2015

us-gaap

Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance

IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

-43808000

USD

CY2016

us-gaap

Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance

IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

924000

USD

CY2017

us-gaap

Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance

IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance

11718000

USD

CY2015

us-gaap

Income Tax Reconciliation Change In Enacted Tax Rate

IncomeTaxReconciliationChangeInEnactedTaxRate

0

USD

CY2016

us-gaap

Income Tax Reconciliation Change In Enacted Tax Rate

IncomeTaxReconciliationChangeInEnactedTaxRate

0

USD

CY2017

us-gaap

Income Tax Reconciliation Change In Enacted Tax Rate

IncomeTaxReconciliationChangeInEnactedTaxRate

38083000

USD

CY2015

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

-1011000

USD

CY2016

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

-4856000

USD

CY2017

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

-14216000

USD

CY2015

us-gaap

Income Tax Reconciliation Other Reconciling Items

IncomeTaxReconciliationOtherReconcilingItems

2613000

USD

CY2016

us-gaap

Income Tax Reconciliation Other Reconciling Items

IncomeTaxReconciliationOtherReconcilingItems

4924000

USD

CY2017

us-gaap

Income Tax Reconciliation Other Reconciling Items

IncomeTaxReconciliationOtherReconcilingItems

-2946000

USD

CY2015

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

4939000

USD

CY2016

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

4487000

USD

CY2017

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

3794000

USD

CY2015

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

10300000

USD

CY2016

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

-1118000

USD

CY2017

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

343000

USD

CY2015

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

89241000

USD

CY2016

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

135945000

USD

CY2017

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

91226000

USD

CY2015

us-gaap

Increase Decrease In Due To Related Parties

IncreaseDecreaseInDueToRelatedParties

0

USD

CY2016

us-gaap

Increase Decrease In Due To Related Parties

IncreaseDecreaseInDueToRelatedParties

0

USD

CY2017

us-gaap

Increase Decrease In Due To Related Parties

IncreaseDecreaseInDueToRelatedParties

0

USD

CY2015

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

-13140000

USD

CY2016

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

-99943000

USD

CY2017

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

-538100000

USD

CY2015

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

105281000

USD

CY2016

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

209314000

USD

CY2017

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

317299000

USD

CY2015

us-gaap

Increase Decrease In Prepaid Reinsurance Premiums

IncreaseDecreaseInPrepaidReinsurancePremiums

128410000

USD

CY2016

us-gaap

Increase Decrease In Prepaid Reinsurance Premiums

IncreaseDecreaseInPrepaidReinsurancePremiums

210589000

USD

CY2017

us-gaap

Increase Decrease In Prepaid Reinsurance Premiums

IncreaseDecreaseInPrepaidReinsurancePremiums

92286000

USD

CY2015

us-gaap

Increase Decrease In Reinsurance Payables

IncreaseDecreaseInReinsurancePayables

64924000

USD

CY2016

us-gaap

Increase Decrease In Reinsurance Payables

IncreaseDecreaseInReinsurancePayables

150009000

USD

CY2017

us-gaap

Increase Decrease In Reinsurance Payables

IncreaseDecreaseInReinsurancePayables

315107000

USD

CY2015

us-gaap

Increase Decrease In Reinsurance Recoverable

IncreaseDecreaseInReinsuranceRecoverable

64104000

USD

CY2016

us-gaap

Increase Decrease In Reinsurance Recoverable

IncreaseDecreaseInReinsuranceRecoverable

145038000

USD

CY2017

us-gaap

Increase Decrease In Reinsurance Recoverable

IncreaseDecreaseInReinsuranceRecoverable

1307066000

USD

CY2015

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

144040000

USD

CY2016

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

342471000

USD

CY2017

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

246036000

USD

CY2015

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

-15632000

USD

CY2016Q1

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

-158069000

USD

CY2016Q2

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

-168514000

USD

CY2016Q3

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

62299000

USD

CY2016Q4

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

132402000

USD

CY2016

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

-131882000

USD

CY2017Q1

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

-178091000

USD

CY2017Q2

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

-173480000

USD

CY2017Q3

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

64571000

USD

CY2017Q4

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

133250000

USD

CY2017

us-gaap

Increase Decrease In Unearned Premiums Net

IncreaseDecreaseInUnearnedPremiumsNet

-153750000

USD

CY2015

us-gaap

Incremental Common Shares Attributable To Share Based Payment Arrangements

IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

369000

shares

CY2016

us-gaap

Incremental Common Shares Attributable To Share Based Payment Arrangements

IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

245000

shares

CY2017

us-gaap

Incremental Common Shares Attributable To Share Based Payment Arrangements

IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

0

shares

CY2017Q4

us-gaap

Indefinite Lived Intangible Assets Excluding Goodwill

IndefiniteLivedIntangibleAssetsExcludingGoodwill

10267000

USD

CY2016Q4

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

148395000

USD

CY2017Q4

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

148395000

USD

CY2016Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

65458000

USD

CY2017Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

54471000

USD

CY2016Q4

us-gaap

Intangible Assets Net Including Goodwill

IntangibleAssetsNetIncludingGoodwill

251186000

USD

CY2017Q4

us-gaap

Intangible Assets Net Including Goodwill

IntangibleAssetsNetIncludingGoodwill

243145000

USD

CY2015

us-gaap

Interest Expense

InterestExpense

36270000

USD

CY2016Q1

us-gaap

Interest Expense

InterestExpense

10538000

USD

CY2016Q2

us-gaap

Interest Expense

InterestExpense

10536000

USD

CY2016Q3

us-gaap

Interest Expense

InterestExpense

10536000

USD

CY2016Q4

us-gaap

Interest Expense

InterestExpense

10534000

USD

CY2016

us-gaap

Interest Expense

InterestExpense

42144000

USD

CY2017Q1

us-gaap

Interest Expense

InterestExpense

10526000

USD

CY2017Q2

us-gaap

Interest Expense

InterestExpense

10091000

USD

CY2017Q3

us-gaap

Interest Expense

InterestExpense

11799000

USD

CY2017Q4

us-gaap

Interest Expense

InterestExpense

11777000

USD

CY2017

us-gaap

Interest Expense

InterestExpense

44193000

USD

CY2015

us-gaap

Interest Paid

InterestPaid

40755000

USD

CY2016

us-gaap

Interest Paid

InterestPaid

53977000

USD

CY2017

us-gaap

Interest Paid

InterestPaid

44171000

USD

CY2015

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

14200000

USD

CY2016

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

15421000

USD

CY2017

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

15387000

USD

CY2016Q4

us-gaap

Investments

9316968000

USD

CY2017Q4

us-gaap

Investments

9503439000

USD

CY2016Q4

us-gaap

Investments In Affiliates Subsidiaries Associates And Joint Ventures

InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

0

USD

CY2017Q4

us-gaap

Investments In Affiliates Subsidiaries Associates And Joint Ventures

InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

0

USD

CY2016Q4

us-gaap

Liabilities

6309911000

USD

CY2017Q4

us-gaap

Liabilities

9538250000

USD

CY2016Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

12352082000

USD

CY2017Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

15226131000

USD

CY2015Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

2767045000

USD

CY2016Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

2848294000

USD

CY2017Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

5080408000

USD

CY2015

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions

1394117000

USD

CY2016

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions

0

USD

CY2017

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Business Acquisitions

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseBusinessAcquisitions

0

USD

CY2015

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

95747000

USD

CY2016

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

83015000

USD

CY2017

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

450527000

USD

CY2015

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

425565000

USD

CY2016

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

506279000

USD

CY2017

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

524298000

USD

CY2015

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

-34340000

USD

CY2016

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

-5326000

USD

CY2017

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

38445000

USD

CY2016Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred But Not Reported Ibnr Claims Amount

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount

1742973000

USD

CY2017Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred But Not Reported Ibnr Claims Amount

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount

2666111000

USD

CY2015

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

448238000

USD

CY2016

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

530831000

USD

CY2017

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

1861428000

USD

CY2014Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

1345816000

USD

CY2015Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

2632519000

USD

CY2016Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

2568730000

USD

CY2017Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

3493778000

USD

CY2015

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Period Increase Decrease

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease

43310000

USD

CY2016

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Period Increase Decrease

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease

-81249000

USD

CY2017

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Period Increase Decrease

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease

-2232114000

USD

CY2016Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Reported Claims Amount

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount

813594000

USD

CY2017Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Reported Claims Amount

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount

1392852000

USD

CY2017Q4

us-gaap

Line Of Credit

LineOfCredit

10000000

GBP

CY2017Q4

us-gaap

Line Of Credit

LineOfCredit

487857000

USD

CY2016Q4

us-gaap

Long Term Debt

LongTermDebt

948663000

USD

CY2017Q4

us-gaap

Long Term Debt

LongTermDebt

989623000

USD

CY2016Q4

us-gaap

Long Term Debt Fair Value

LongTermDebtFairValue

964800000

USD

CY2017Q4

us-gaap

Long Term Debt Fair Value

LongTermDebtFairValue

1018200000

USD

CY2017Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal After Year Five

LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

750000000

USD

CY2017Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal In Next Twelve Months

LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

0

USD

CY2017Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal In Year Five

LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

0

USD

CY2017Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal In Year Four

LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

0

USD

CY2017Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal In Year Three

LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

250000000

USD

CY2017Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal In Year Two

LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

0

USD

CY2015

us-gaap

Loss Ratio

LossRatio

0.320

CY2016

us-gaap

Loss Ratio

LossRatio

0.378

CY2017

us-gaap

Loss Ratio

LossRatio

1.084

CY2015

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-93913000

USD

CY2016

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-401331000

USD

CY2017

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

28860000

USD

CY2015

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-339039000

USD

CY2016

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-164532000

USD

CY2017

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

-142434000

USD

CY2015

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

424985000

USD

CY2016

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

484772000

USD

CY2017

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

1045787000

USD

CY2015

us-gaap

Net Income Loss

NetIncomeLoss

431192000

USD

CY2016Q1

us-gaap

Net Income Loss

NetIncomeLoss

133590000

USD

CY2016Q2

us-gaap

Net Income Loss

NetIncomeLoss

141921000

USD

CY2016Q3

us-gaap

Net Income Loss

NetIncomeLoss

152420000

USD

CY2016Q4

us-gaap

Net Income Loss

NetIncomeLoss

75031000

USD

CY2016

us-gaap

Net Income Loss

NetIncomeLoss

502962000

USD

CY2017Q1

us-gaap

Net Income Loss

NetIncomeLoss

97947000

USD

CY2017Q2

us-gaap

Net Income Loss

NetIncomeLoss

176738000

USD

CY2017Q3

us-gaap

Net Income Loss

NetIncomeLoss

-499217000

USD

CY2017Q4

us-gaap

Net Income Loss

NetIncomeLoss

2143000

USD

CY2017

us-gaap

Net Income Loss

NetIncomeLoss

-222389000

USD

CY2015

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

111050000

USD

CY2016Q1

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

44591000

USD

CY2016Q2

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

30635000

USD

CY2016Q3

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

35641000

USD

CY2016Q4

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

16219000

USD

CY2016

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

127086000

USD

CY2017Q1

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

34327000

USD

CY2017Q2

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

37612000

USD

CY2017Q3

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

-204277000

USD

CY2017Q4

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

56000

USD

CY2017

us-gaap

Net Income Loss Attributable To Noncontrolling Interest

NetIncomeLossAttributableToNoncontrollingInterest

-132282000

USD

CY2015

us-gaap

Net Income Loss Attributable To Redeemable Noncontrolling Interest

NetIncomeLossAttributableToRedeemableNoncontrollingInterest

111050000

USD

CY2016

us-gaap

Net Income Loss Attributable To Redeemable Noncontrolling Interest

NetIncomeLossAttributableToRedeemableNoncontrollingInterest

127086000

USD

CY2015

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

408811000

USD

CY2017

us-gaap

Net Income Loss Attributable To Redeemable Noncontrolling Interest

NetIncomeLossAttributableToRedeemableNoncontrollingInterest

-132282000

USD

CY2017

us-gaap

Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable

NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable

-132282000

USD

CY2016Q1

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

127995000

USD

CY2016Q2

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

136325000

USD

CY2016Q3

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

146825000

USD

CY2016Q4

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

69436000

USD

CY2016

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

480581000

USD

CY2017Q1

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

92352000

USD

CY2017Q2

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

171142000

USD

CY2017Q3

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

-504812000

USD

CY2017Q4

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

-3452000

USD

CY2017

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

-244770000

USD

CY2015

us-gaap

Net Investment Income

NetInvestmentIncome

152567000

USD

CY2016Q1

us-gaap

Net Investment Income

NetInvestmentIncome

28863000

USD

CY2016Q2

us-gaap

Net Investment Income

NetInvestmentIncome

54124000

USD

CY2016Q3

us-gaap

Net Investment Income

NetInvestmentIncome

51423000

USD

CY2016Q4

us-gaap

Net Investment Income

NetInvestmentIncome

47316000

USD

CY2016

us-gaap

Net Investment Income

NetInvestmentIncome

181726000

USD

CY2017Q1

us-gaap

Net Investment Income

NetInvestmentIncome

54325000

USD

CY2017Q2

us-gaap

Net Investment Income

NetInvestmentIncome

54163000

USD

CY2017Q3

us-gaap

Net Investment Income

NetInvestmentIncome

40257000

USD

CY2017Q4

us-gaap

Net Investment Income

NetInvestmentIncome

73464000

USD

CY2017

us-gaap

Net Investment Income

NetInvestmentIncome

222209000

USD

CY2015

us-gaap

Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable

NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable

111050000

USD

CY2016

us-gaap

Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable

NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable

127086000

USD

CY2015

us-gaap

Operating Expenses

OperatingExpenses

219112000

USD

CY2016Q1

us-gaap

Operating Expenses

OperatingExpenses

56235000

USD

CY2016Q2

us-gaap

Operating Expenses

OperatingExpenses

51073000

USD

CY2016Q3

us-gaap

Operating Expenses

OperatingExpenses

40493000

USD

CY2016Q4

us-gaap

Operating Expenses

OperatingExpenses

49948000

USD

CY2016

us-gaap

Operating Expenses

OperatingExpenses

197749000

USD

CY2017Q1

us-gaap

Operating Expenses

OperatingExpenses

47283000

USD

CY2017Q2

us-gaap

Operating Expenses

OperatingExpenses

41766000

USD

CY2017Q3

us-gaap

Operating Expenses

OperatingExpenses

42537000

USD

CY2017Q4

us-gaap

Operating Expenses

OperatingExpenses

29192000

USD

CY2017

us-gaap

Operating Expenses

OperatingExpenses

160778000

USD

CY2017Q4

us-gaap

Operating Leases Future Minimum Payments Due

OperatingLeasesFutureMinimumPaymentsDue

30805000

USD

CY2017Q4

us-gaap

Operating Leases Future Minimum Payments Due Current

OperatingLeasesFutureMinimumPaymentsDueCurrent

7604000

USD

CY2017Q4

us-gaap

Operating Leases Future Minimum Payments Due In Five Years

OperatingLeasesFutureMinimumPaymentsDueInFiveYears

4249000

USD

CY2017Q4

us-gaap

Operating Leases Future Minimum Payments Due In Four Years

OperatingLeasesFutureMinimumPaymentsDueInFourYears

4925000

USD

CY2017Q4

us-gaap

Operating Leases Future Minimum Payments Due In Three Years

OperatingLeasesFutureMinimumPaymentsDueInThreeYears

5249000

USD

CY2017Q4

us-gaap

Operating Leases Future Minimum Payments Due In Two Years

OperatingLeasesFutureMinimumPaymentsDueInTwoYears

6937000

USD

CY2017Q4

us-gaap

Operating Leases Future Minimum Payments Due Thereafter

OperatingLeasesFutureMinimumPaymentsDueThereafter

1841000

USD

CY2016Q4

us-gaap

Other Assets

OtherAssets

175382000

USD

CY2017Q4

us-gaap

Other Assets

OtherAssets

121226000

USD

CY2016Q4

us-gaap

Other Assets Fair Value Disclosure

OtherAssetsFairValueDisclosure

4379000

USD

CY2017Q4

us-gaap

Other Assets Fair Value Disclosure

OtherAssetsFairValueDisclosure

2542000

USD

CY2015

us-gaap

Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

1308000

USD

CY2016

us-gaap

Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

975000

USD

CY2017

us-gaap

Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

909000

USD

CY2015

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

-1308000

USD

CY2016

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

-975000

USD

CY2017

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

-909000

USD

CY2016Q4

us-gaap

Other Investments

OtherInvestments

549805000

USD

CY2017Q4

us-gaap

Other Investments

OtherInvestments

594793000

USD

CY2016Q4

us-gaap

Other Liabilities

OtherLiabilities

301684000

USD

CY2017Q4

us-gaap

Other Liabilities

OtherLiabilities

792771000

USD

CY2016Q4

us-gaap

Other Liabilities Fair Value Disclosure

OtherLiabilitiesFairValueDisclosure

17383000

USD

CY2017Q4

us-gaap

Other Liabilities Fair Value Disclosure

OtherLiabilitiesFairValueDisclosure

5494000

USD

CY2015

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

13472000

USD

CY2016Q1

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

4079000

USD

CY2016Q2

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

2654000

USD

CY2016Q3

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

2268000

USD

CY2016Q4

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

5177000

USD

CY2016

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

14178000

USD

CY2017Q1

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

1665000

USD

CY2017Q2

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

2392000

USD

CY2017Q3

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

2996000

USD

CY2017Q4

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

2362000

USD

CY2017

us-gaap

Other Operating Income Expense Net

OtherOperatingIncomeExpenseNet

9415000

USD

CY2016Q4

us-gaap

Payables To Broker Dealers And Clearing Organizations

PayablesToBrokerDealersAndClearingOrganizations

305714000

USD

CY2017Q4

us-gaap

Payables To Broker Dealers And Clearing Organizations

PayablesToBrokerDealersAndClearingOrganizations

208749000

USD

CY2015

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

521312000

USD

CY2016

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

589294000

USD

CY2017

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

974825000

USD

CY2015

us-gaap

Payments For Proceeds From Businesses And Interest In Affiliates

PaymentsForProceedsFromBusinessesAndInterestInAffiliates

0

USD

CY2016

us-gaap

Payments For Proceeds From Businesses And Interest In Affiliates

PaymentsForProceedsFromBusinessesAndInterestInAffiliates

0

USD

CY2017

us-gaap

Payments For Proceeds From Businesses And Interest In Affiliates

PaymentsForProceedsFromBusinessesAndInterestInAffiliates

0

USD

CY2015

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

-4500000

USD

CY2016

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

-400000

USD

CY2017

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

0

USD

CY2015

us-gaap

Payments For Repurchase Of Common Stock

PaymentsForRepurchaseOfCommonStock

259874000

USD

CY2016

us-gaap

Payments For Repurchase Of Common Stock

PaymentsForRepurchaseOfCommonStock

309434000

USD

CY2017

us-gaap

Payments For Repurchase Of Common Stock

PaymentsForRepurchaseOfCommonStock

188591000

USD

CY2015

us-gaap

Payments For Repurchase Of Redeemable Noncontrolling Interest

PaymentsForRepurchaseOfRedeemableNoncontrollingInterest

193032000

USD

CY2016

us-gaap

Payments For Repurchase Of Redeemable Noncontrolling Interest

PaymentsForRepurchaseOfRedeemableNoncontrollingInterest

2990000

USD

CY2017

us-gaap

Payments For Repurchase Of Redeemable Noncontrolling Interest

PaymentsForRepurchaseOfRedeemableNoncontrollingInterest

-260475000

USD

CY2015

us-gaap

Payments Of Dividends Common Stock

PaymentsOfDividendsCommonStock

53967000

USD

CY2016

us-gaap

Payments Of Dividends Common Stock

PaymentsOfDividendsCommonStock

51583000

USD

CY2017

us-gaap

Payments Of Dividends Common Stock

PaymentsOfDividendsCommonStock

51370000

USD

CY2015

us-gaap

Payments Of Dividends Preferred Stock And Preference Stock

PaymentsOfDividendsPreferredStockAndPreferenceStock

22381000

USD

CY2016

us-gaap

Payments Of Dividends Preferred Stock And Preference Stock

PaymentsOfDividendsPreferredStockAndPreferenceStock

22381000

USD

CY2017

us-gaap

Payments Of Dividends Preferred Stock And Preference Stock

PaymentsOfDividendsPreferredStockAndPreferenceStock

22381000

USD

CY2015

us-gaap

Payments Related To Tax Withholding For Share Based Compensation

PaymentsRelatedToTaxWithholdingForShareBasedCompensation

10248000

USD

CY2016

us-gaap

Payments Related To Tax Withholding For Share Based Compensation

PaymentsRelatedToTaxWithholdingForShareBasedCompensation

14943000

USD

CY2017

us-gaap

Payments Related To Tax Withholding For Share Based Compensation

PaymentsRelatedToTaxWithholdingForShareBasedCompensation

15139000

USD

CY2015

us-gaap

Payments To Acquire Businesses Net Of Cash Acquired

PaymentsToAcquireBusinessesNetOfCashAcquired

678152000

USD

CY2016

us-gaap

Payments To Acquire Businesses Net Of Cash Acquired

PaymentsToAcquireBusinessesNetOfCashAcquired

0

USD

CY2017

us-gaap

Payments To Acquire Businesses Net Of Cash Acquired

PaymentsToAcquireBusinessesNetOfCashAcquired

0

USD

CY2015

us-gaap

Payments To Acquire Equity Method Investments

PaymentsToAcquireEquityMethodInvestments

10150000

USD

CY2016

us-gaap

Payments To Acquire Equity Method Investments

PaymentsToAcquireEquityMethodInvestments

0

USD

CY2017

us-gaap

Payments To Acquire Equity Method Investments

PaymentsToAcquireEquityMethodInvestments

0

USD

CY2015

us-gaap

Payments To Acquire Trading Securities Heldforinvestment

PaymentsToAcquireTradingSecuritiesHeldforinvestment

9683068000

USD

CY2016

us-gaap

Payments To Acquire Trading Securities Heldforinvestment

PaymentsToAcquireTradingSecuritiesHeldforinvestment

8282720000

USD

CY2017

us-gaap

Payments To Acquire Trading Securities Heldforinvestment

PaymentsToAcquireTradingSecuritiesHeldforinvestment

10093532000

USD

CY2015

us-gaap

Policyholder Benefits And Claims Incurred Gross

PolicyholderBenefitsAndClaimsIncurredGross

544972000

USD

CY2016

us-gaap

Policyholder Benefits And Claims Incurred Gross

PolicyholderBenefitsAndClaimsIncurredGross

710651000

USD

CY2017

us-gaap

Policyholder Benefits And Claims Incurred Gross

PolicyholderBenefitsAndClaimsIncurredGross

3420388000

USD

CY2015

us-gaap

Policyholder Benefits And Claims Incurred Net