$MTG
MGIC INVESTMENT CORP Stock $mtg

$mtg Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-Q Financial Statement

#000087643717000056 Filed on November 07, 2017

Income Statement

Concept	2017 Q4	2017 Q3	2016 Q3
Revenue	$31.28M	$270.4M	$273.9M
YoY Change	11.33%	-1.27%	1.61%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$15.50M	$2.985M	$2.575M
YoY Change	-8.82%	15.92%	8.74%
% of Gross Profit
Operating Expenses	$12.80M	$72.60M	$101.4M
YoY Change	-85.5%	-28.4%	-18.82%
Operating Profit
YoY Change
Interest Expense	-$13.30M	-$13.30M	-$13.50M
YoY Change	-17.9%	-1.48%	-22.41%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$245.5M	$184.5M	$83.75M
YoY Change	51.54%	120.26%	-34.18%
Income Tax	$218.1M	$64.44M	$27.13M
% Of Pretax Income	88.86%	34.93%	32.4%
Net Earnings	$27.31M	$120.0M	$56.62M
YoY Change	-74.59%	111.99%	-93.12%
Net Earnings / Revenue	87.33%	44.4%	20.67%
Basic Earnings Per Share	$0.07	$0.32	$0.16
Diluted Earnings Per Share	$0.07	$0.32	$0.14
COMMON SHARES
Basic Shares Outstanding	370.6M shares	370.6M shares	349.4M shares
Diluted Shares Outstanding		391.1M shares	406.1M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2016 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$99.85M	$250.7M	$274.7M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$44.94M	$43.16M	$32.01M
YoY Change	24.52%	34.83%	9.38%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$4.991B	$4.717B	$4.726B
YoY Change	6.37%	-0.19%	2.87%
Other Assets	$234.0M	$416.0M	$602.0M
YoY Change	-61.51%	-30.9%	-20.69%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$5.619B	$5.676B	$5.873B
YoY Change	-2.01%	-3.36%	-2.25%
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
YoY Change
LONG-TERM LIABILITIES
Long-Term Debt	$830.0M	$830.0M	$1.178B
YoY Change	-29.6%	-29.54%	-4.58%
Other Long-Term Liabilities	$256.0M	$240.0M	$255.0M
YoY Change	7.56%	-5.88%	-19.81%
Total Long-Term Liabilities	$1.086B	$1.070B	$1.433B
YoY Change	-23.36%	-25.33%	16.08%
TOTAL LIABILITIES
Total Short-Term Liabilities
Total Long-Term Liabilities	$1.086B	$1.070B	$1.433B
Total Liabilities	$2.465B	$2.546B	$3.290B
YoY Change	-22.62%	-22.62%	-14.76%
SHAREHOLDERS EQUITY
Retained Earnings	$977.2M	$939.4M	$525.1M
YoY Change	54.48%	78.91%	179.85%
Common Stock	$2.221B	$2.217B	$2.139B
YoY Change	3.71%	3.62%	6.57%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$0.00	$0.00	$111.5M
YoY Change	-100.0%	-100.0%	3215.26%
Treasury Stock Shares	0.000 shares	0.000 shares	13.92M shares
Shareholders Equity	$3.155B	$3.130B	$2.583B
YoY Change
Total Liabilities & Shareholders Equity	$5.619B	$5.676B	$5.873B
YoY Change	-2.01%	-3.36%	-2.25%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2016 Q3
OPERATING ACTIVITIES
Net Income	$27.31M	$120.0M	$56.62M
YoY Change	-74.59%	111.99%	-93.12%
Depreciation, Depletion And Amortization	$15.50M	$2.985M	$2.575M
YoY Change	-8.82%	15.92%	8.74%
Cash From Operating Activities	$150.3M	$130.8M	$94.00M
YoY Change	98.28%	39.15%	-51.77%
INVESTING ACTIVITIES
Capital Expenditures	-$4.000M	-$2.400M	-$2.300M
YoY Change	-28.57%	4.35%	109.09%
Acquisitions
YoY Change
Other Investing Activities	-$297.2M	-$5.500M	-$212.9M
YoY Change	122.29%	-97.42%	765.45%
Cash From Investing Activities	-$301.1M	-$7.900M	-$215.0M
YoY Change	116.0%	-96.33%	736.58%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-100.0K	0.000	94.90M
YoY Change	-99.82%	-100.0%	-19080.0%
NET CHANGE
Cash From Operating Activities	150.3M	130.8M	94.00M
Cash From Investing Activities	-301.1M	-7.900M	-215.0M
Cash From Financing Activities	-100.0K	0.000	94.90M
Net Change In Cash	-150.9M	122.9M	-26.10M
YoY Change	26.38%	-570.88%	-115.47%
FREE CASH FLOW
Cash From Operating Activities	$150.3M	$130.8M	$94.00M
Capital Expenditures	-$4.000M	-$2.400M	-$2.300M
Free Cash Flow	$154.3M	$133.2M	$96.30M
YoY Change	89.56%	38.32%	-50.87%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
	dei	Document Period End Date DocumentPeriodEndDate	2017-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000876437
CY2017Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	370566801	shares
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	MGIC INVESTMENT CORP
CY2014Q4	mtg	Amount Of Irs Assessment AmountOfIRSAssessment	197500000	USD
CY2014Q4	mtg	Amount Of Irs Assessment Related To Disallowance Of Carryback AmountOfIRSAssessmentRelatedToDisallowanceOfCarryback	261400000	USD
CY2016Q4	mtg	Asset Backed Securities Fair Value Disclosure AssetBackedSecuritiesFairValueDisclosure	59565000	USD
CY2017Q3	mtg	Asset Backed Securities Fair Value Disclosure AssetBackedSecuritiesFairValueDisclosure	9860000	USD
	mtg	Federal Home Loan Bank Advances Collateral Market Value Of Principal Percent FederalHomeLoanBankAdvancesCollateralMarketValueOfPrincipalPercent	1.02
CY2016	mtg	Average Paid Claims Reduction Due To Curtailments AveragePaidClaimsReductionDueToCurtailments	0.055
	mtg	Average Paid Claims Reduction Due To Curtailments AveragePaidClaimsReductionDueToCurtailments	0.055
	mtg	Payment Of Original Issue Discount Convertible Senior Notes PaymentOfOriginalIssueDiscountConvertibleSeniorNotes	4504000	USD
CY2016Q4	mtg	Collateralized Loan Obligations Fair Value Disclosure CollateralizedLoanObligationsFairValueDisclosure	121175000	USD
CY2017Q3	mtg	Collateralized Loan Obligations Fair Value Disclosure CollateralizedLoanObligationsFairValueDisclosure	109734000	USD
CY2016Q4	mtg	Commercial Mortgage Backed Securities Fair Value Disclosure CommercialMortgageBackedSecuritiesFairValueDisclosure	319817000	USD
CY2017Q3	mtg	Commercial Mortgage Backed Securities Fair Value Disclosure CommercialMortgageBackedSecuritiesFairValueDisclosure	305425000	USD
CY2015Q3	mtg	Common Shares Purchasable Per Right In Shares CommonSharesPurchasablePerRightInShares	0.1	shares
CY2015Q3	mtg	Common Stock Beneficial Ownership Threshold To Be Considered Acquiring Person CommonStockBeneficialOwnershipThresholdToBeConsideredAcquiringPerson	0.05
CY2016Q4	mtg	Corporate Debt Securities Fair Value Disclosure CorporateDebtSecuritiesFairValueDisclosure	1743910000	USD
CY2017Q3	mtg	Corporate Debt Securities Fair Value Disclosure CorporateDebtSecuritiesFairValueDisclosure	1875255000	USD
	mtg	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	1500000	USD
CY2016Q4	mtg	Equity Securities EquitySecurities	7128000	USD
CY2017Q3	mtg	Equity Securities EquitySecurities	7239000	USD
CY2017Q3	mtg	Estimate Of Additional State Income Taxes And Interest That May Be Due EstimateOfAdditionalStateIncomeTaxesAndInterestThatMayBeDue	84100000	USD
CY2017Q3	mtg	Estimate Of Federal Interest That May Be Due EstimateOfFederalInterestThatMayBeDue	200300000	USD
	mtg	Gain Losses On Extinguishment Of Debt Cash Portion GainLossesOnExtinguishmentOfDebtCashPortion	59460000	USD
	mtg	Gain Losses On Extinguishment Of Debt Cash Portion GainLossesOnExtinguishmentOfDebtCashPortion	0	USD
	mtg	Increase Decrease In Profit Commission Receivable IncreaseDecreaseInProfitCommissionReceivable	2005000	USD
	mtg	Increase Decrease In Profit Commission Receivable IncreaseDecreaseInProfitCommissionReceivable	3899000	USD
	mtg	Increase Decrease In Reinsurance Recoverable On Paid Losses IncreaseDecreaseInReinsuranceRecoverableOnPaidLosses	-1313000	USD
	mtg	Increase Decrease In Reinsurance Recoverable On Paid Losses IncreaseDecreaseInReinsuranceRecoverableOnPaidLosses	326000	USD
CY2017Q3	mtg	Maximum Exposure Associated With Other Discussions Legal Proceedings MaximumExposureAssociatedWithOtherDiscussionsLegalProceedings	289000000	USD
CY2017Q3	mtg	Number Of Jurisdictions With Risk To Capital Requirements NumberOfJurisdictionsWithRiskToCapitalRequirements	16	jurisdiction
CY2016Q3	mtg	Number Of Payments Delinquent12 Payments Or More NumberOfPaymentsDelinquent12PaymentsOrMore	20777	loan
CY2016Q4	mtg	Number Of Payments Delinquent12 Payments Or More NumberOfPaymentsDelinquent12PaymentsOrMore	18971	loan
CY2017Q3	mtg	Number Of Payments Delinquent12 Payments Or More NumberOfPaymentsDelinquent12PaymentsOrMore	13736	loan
CY2016Q3	mtg	Number Of Payments Delinquent12 Payments Or More Percentage NumberOfPaymentsDelinquent12PaymentsOrMorePercentage	0.40
CY2016Q4	mtg	Number Of Payments Delinquent12 Payments Or More Percentage NumberOfPaymentsDelinquent12PaymentsOrMorePercentage	0.38
CY2017Q3	mtg	Number Of Payments Delinquent12 Payments Or More Percentage NumberOfPaymentsDelinquent12PaymentsOrMorePercentage	0.33
CY2016Q3	mtg	Number Of Payments Delinquent3 Payments Or Less NumberOfPaymentsDelinquent3PaymentsOrLess	18374	loan
CY2016Q4	mtg	Number Of Payments Delinquent3 Payments Or Less NumberOfPaymentsDelinquent3PaymentsOrLess	18419	loan
CY2017Q3	mtg	Number Of Payments Delinquent3 Payments Or Less NumberOfPaymentsDelinquent3PaymentsOrLess	16916	loan
CY2016Q3	mtg	Number Of Payments Delinquent3 Payments Or Less Percentage NumberOfPaymentsDelinquent3PaymentsOrLessPercentage	0.36
CY2016Q4	mtg	Number Of Payments Delinquent3 Payments Or Less Percentage NumberOfPaymentsDelinquent3PaymentsOrLessPercentage	0.36
CY2017Q3	mtg	Number Of Payments Delinquent3 Payments Or Less Percentage NumberOfPaymentsDelinquent3PaymentsOrLessPercentage	0.41
CY2016Q3	mtg	Number Of Payments Delinquent4 To11 Payments NumberOfPaymentsDelinquent4To11Payments	12282	loan
CY2016Q4	mtg	Number Of Payments Delinquent4 To11 Payments NumberOfPaymentsDelinquent4To11Payments	12892	loan
CY2017Q3	mtg	Number Of Payments Delinquent4 To11 Payments NumberOfPaymentsDelinquent4To11Payments	10583	loan
CY2016Q3	mtg	Number Of Payments Delinquent4 To11 Payments Percentage NumberOfPaymentsDelinquent4To11PaymentsPercentage	0.24
CY2016Q4	mtg	Number Of Payments Delinquent4 To11 Payments Percentage NumberOfPaymentsDelinquent4To11PaymentsPercentage	0.26
CY2017Q3	mtg	Number Of Payments Delinquent4 To11 Payments Percentage NumberOfPaymentsDelinquent4To11PaymentsPercentage	0.26
CY2016Q4	mtg	Obligations Of Us States And Political Subdivisions Fair Value Disclosure ObligationsOfUSStatesAndPoliticalSubdivisionsFairValueDisclosure	2143016000	USD
CY2017Q3	mtg	Obligations Of Us States And Political Subdivisions Fair Value Disclosure ObligationsOfUSStatesAndPoliticalSubdivisionsFairValueDisclosure	2113283000	USD
CY2017Q3	mtg	Operating Loss Carryforwards Alternative Minimum Tax OperatingLossCarryforwardsAlternativeMinimumTax	117900000	USD
	mtg	Payment Of Original Issue Discount Convertible Junior Subordinated Debt PaymentOfOriginalIssueDiscountConvertibleJuniorSubordinatedDebt	41540000	USD
	mtg	Payment Of Original Issue Discount Convertible Junior Subordinated Debt PaymentOfOriginalIssueDiscountConvertibleJuniorSubordinatedDebt	0	USD
	mtg	Payment Of Original Issue Discount Convertible Senior Notes PaymentOfOriginalIssueDiscountConvertibleSeniorNotes	11250000	USD
CY2007	mtg	Payment On Irs Assessment Related To Remic Issue PaymentOnIrsAssessmentRelatedToRemicIssue	65200000	USD
CY2017Q3	mtg	Percentage Of Statutory Policyholders Surplus Used To Determine Maximum Allowable Dividends PercentageOfStatutoryPolicyholdersSurplusUsedToDetermineMaximumAllowableDividends	0.1
	mtg	Period Of Existing Captive Reinsurance Agreement PeriodOfExistingCaptiveReinsuranceAgreement	P10Y
CY2016Q3	mtg	Pool Insurance Notice Inventory PoolInsuranceNoticeInventory	1979	loan
CY2016Q4	mtg	Pool Insurance Notice Inventory PoolInsuranceNoticeInventory	1883	loan
CY2017Q3	mtg	Pool Insurance Notice Inventory PoolInsuranceNoticeInventory	1426	loan
CY2016Q4	mtg	Premium Refund Liability Expected Claim Payments PremiumRefundLiabilityExpectedClaimPayments	85000000	USD
CY2017Q3	mtg	Premium Refund Liability Expected Claim Payments PremiumRefundLiabilityExpectedClaimPayments	68000000	USD
CY2015Q4	mtg	Primary Default Inventory PrimaryDefaultInventory	62633	loan
CY2016Q2	mtg	Primary Default Inventory PrimaryDefaultInventory	52558	loan
CY2016Q3	mtg	Primary Default Inventory PrimaryDefaultInventory	51433	loan
CY2016Q4	mtg	Primary Default Inventory PrimaryDefaultInventory	50282	loan
CY2017Q2	mtg	Primary Default Inventory PrimaryDefaultInventory	41317	loan
CY2017Q3	mtg	Primary Default Inventory PrimaryDefaultInventory	41235	loan
CY2016Q3	mtg	Primary Default Inventory Claims Received Inventory PrimaryDefaultInventoryClaimsReceivedInventory	1636	loan
CY2016Q4	mtg	Primary Default Inventory Claims Received Inventory PrimaryDefaultInventoryClaimsReceivedInventory	1385	loan
CY2017Q3	mtg	Primary Default Inventory Claims Received Inventory PrimaryDefaultInventoryClaimsReceivedInventory	1063	loan
CY2016Q3	mtg	Primary Default Inventory Claims Received Inventory Percentage PrimaryDefaultInventoryClaimsReceivedInventoryPercentage	0.03
CY2016Q4	mtg	Primary Default Inventory Claims Received Inventory Percentage PrimaryDefaultInventoryClaimsReceivedInventoryPercentage	0.03
CY2017Q3	mtg	Primary Default Inventory Claims Received Inventory Percentage PrimaryDefaultInventoryClaimsReceivedInventoryPercentage	0.03
CY2016Q3	mtg	Primary Default Inventory Cures PrimaryDefaultInventoryCures	15556	loan
	mtg	Primary Default Inventory Cures PrimaryDefaultInventoryCures	50249	loan
CY2017Q3	mtg	Primary Default Inventory Cures PrimaryDefaultInventoryCures	13546	loan
	mtg	Primary Default Inventory Cures PrimaryDefaultInventoryCures	45382	loan
CY2016Q3	mtg	Primary Default Inventory Four To Eleven Months PrimaryDefaultInventoryFourToElevenMonths	12648	loan
CY2016Q4	mtg	Primary Default Inventory Four To Eleven Months PrimaryDefaultInventoryFourToElevenMonths	13450	loan
CY2017Q3	mtg	Primary Default Inventory Four To Eleven Months PrimaryDefaultInventoryFourToElevenMonths	11092	loan
CY2016Q3	mtg	Primary Default Inventory Four To Eleven Months Percentage PrimaryDefaultInventoryFourToElevenMonthsPercentage	0.25
CY2016Q4	mtg	Primary Default Inventory Four To Eleven Months Percentage PrimaryDefaultInventoryFourToElevenMonthsPercentage	0.27
CY2017Q3	mtg	Primary Default Inventory Four To Eleven Months Percentage PrimaryDefaultInventoryFourToElevenMonthsPercentage	0.27
CY2016Q4	mtg	Primary Default Inventory New Notices PrimaryDefaultInventoryNewNotices	5519	loan
CY2016Q3	mtg	Primary Default Inventory New Notices PrimaryDefaultInventoryNewNotices	17607	loan
	mtg	Primary Default Inventory New Notices PrimaryDefaultInventoryNewNotices	50418	loan
CY2017Q3	mtg	Primary Default Inventory New Notices PrimaryDefaultInventoryNewNotices	15950	loan
	mtg	Primary Default Inventory New Notices PrimaryDefaultInventoryNewNotices	45352	loan
CY2016Q4	mtg	Primary Default Inventory New Notices In Fema Individual Assistance Disaster Areas PrimaryDefaultInventoryNewNoticesInFEMAIndividualAssistanceDisasterAreas	637	loan
CY2016Q3	mtg	Primary Default Inventory Other Items Removed PrimaryDefaultInventoryOtherItemsRemoved	0	loan
	mtg	Primary Default Inventory Other Items Removed PrimaryDefaultInventoryOtherItemsRemoved	1273	loan
CY2017Q3	mtg	Primary Default Inventory Other Items Removed PrimaryDefaultInventoryOtherItemsRemoved	209	loan
	mtg	Primary Default Inventory Other Items Removed PrimaryDefaultInventoryOtherItemsRemoved	1337	loan
CY2016Q4	mtg	Primary Default Inventory Other New Notices PrimaryDefaultInventoryOtherNewNotices	4882	loan
CY2016Q3	mtg	Primary Default Inventory Paids PrimaryDefaultInventoryPaids	3051	loan
	mtg	Primary Default Inventory Paids PrimaryDefaultInventoryPaids	9619	loan
CY2017Q3	mtg	Primary Default Inventory Paids PrimaryDefaultInventoryPaids	2195	loan
	mtg	Primary Default Inventory Paids PrimaryDefaultInventoryPaids	7403	loan
CY2016Q3	mtg	Primary Default Inventory Percentage PrimaryDefaultInventoryPercentage	1.00
CY2016Q3	mtg	Primary Default Inventory Percentage PrimaryDefaultInventoryPercentage	1
CY2016Q4	mtg	Primary Default Inventory Percentage PrimaryDefaultInventoryPercentage	1.00
CY2016Q4	mtg	Primary Default Inventory Percentage PrimaryDefaultInventoryPercentage	1
CY2017Q3	mtg	Primary Default Inventory Percentage PrimaryDefaultInventoryPercentage	1
CY2017Q3	mtg	Primary Default Inventory Percentage PrimaryDefaultInventoryPercentage	1.00
CY2016Q3	mtg	Primary Default Inventory Rescissions And Denials PrimaryDefaultInventoryRescissionsAndDenials	125	loan
	mtg	Primary Default Inventory Rescissions And Denials PrimaryDefaultInventoryRescissionsAndDenials	477	loan
CY2017Q3	mtg	Primary Default Inventory Rescissions And Denials PrimaryDefaultInventoryRescissionsAndDenials	82	loan
	mtg	Primary Default Inventory Rescissions And Denials PrimaryDefaultInventoryRescissionsAndDenials	277	loan
CY2016Q3	mtg	Primary Default Inventory Three Months Or Less PrimaryDefaultInventoryThreeMonthsOrLess	12333	loan
CY2016Q4	mtg	Primary Default Inventory Three Months Or Less PrimaryDefaultInventoryThreeMonthsOrLess	12194	loan
CY2017Q3	mtg	Primary Default Inventory Three Months Or Less PrimaryDefaultInventoryThreeMonthsOrLess	11331	loan
CY2016Q3	mtg	Primary Default Inventory Three Months Or Less Percentage PrimaryDefaultInventoryThreeMonthsOrLessPercentage	0.24
CY2016Q4	mtg	Primary Default Inventory Three Months Or Less Percentage PrimaryDefaultInventoryThreeMonthsOrLessPercentage	0.24
CY2017Q3	mtg	Primary Default Inventory Three Months Or Less Percentage PrimaryDefaultInventoryThreeMonthsOrLessPercentage	0.27
CY2016Q3	mtg	Primary Default Inventory Twelve Months Or More PrimaryDefaultInventoryTwelveMonthsOrMore	26452	loan
CY2016Q4	mtg	Primary Default Inventory Twelve Months Or More PrimaryDefaultInventoryTwelveMonthsOrMore	24638	loan
CY2017Q3	mtg	Primary Default Inventory Twelve Months Or More PrimaryDefaultInventoryTwelveMonthsOrMore	18812	loan
CY2016Q3	mtg	Primary Default Inventory Twelve Months Or More Percent Of Primary Default Inventory In Default For Twelve Months Or More In Default For More Than Thirty Six Consecutive Months PrimaryDefaultInventoryTwelveMonthsOrMorePercentOfPrimaryDefaultInventoryInDefaultForTwelveMonthsOrMoreInDefaultForMoreThanThirtySixConsecutiveMonths	0.48
CY2016Q4	mtg	Primary Default Inventory Twelve Months Or More Percent Of Primary Default Inventory In Default For Twelve Months Or More In Default For More Than Thirty Six Consecutive Months PrimaryDefaultInventoryTwelveMonthsOrMorePercentOfPrimaryDefaultInventoryInDefaultForTwelveMonthsOrMoreInDefaultForMoreThanThirtySixConsecutiveMonths	0.47
CY2017Q3	mtg	Primary Default Inventory Twelve Months Or More Percent Of Primary Default Inventory In Default For Twelve Months Or More In Default For More Than Thirty Six Consecutive Months PrimaryDefaultInventoryTwelveMonthsOrMorePercentOfPrimaryDefaultInventoryInDefaultForTwelveMonthsOrMoreInDefaultForMoreThanThirtySixConsecutiveMonths	0.45
CY2016Q3	mtg	Primary Default Inventory Twelve Months Or More Percentage PrimaryDefaultInventoryTwelveMonthsOrMorePercentage	0.51
CY2016Q4	mtg	Primary Default Inventory Twelve Months Or More Percentage PrimaryDefaultInventoryTwelveMonthsOrMorePercentage	0.49
CY2017Q3	mtg	Primary Default Inventory Twelve Months Or More Percentage PrimaryDefaultInventoryTwelveMonthsOrMorePercentage	0.46
	mtg	Purchase Of Convertible Junior Subordinated Debt PurchaseOfConvertibleJuniorSubordinatedDebt	100860000	USD
	mtg	Purchase Of Convertible Junior Subordinated Debt PurchaseOfConvertibleJuniorSubordinatedDebt	0	USD
CY2015Q3	mtg	Purchase Price Per Full Share PurchasePricePerFullShare	45
CY2015Q3	mtg	Purchase Price Per One Tenth Share PurchasePricePerOneTenthShare	4.50
CY2015Q3	mtg	Redemption Price Per Share RedemptionPricePerShare	0.001
	mtg	Reinsurance Terminations ReinsuranceTerminations	2854000	USD
	mtg	Reinsurance Terminations ReinsuranceTerminations	-301000	USD
CY2016Q4	mtg	Residential Mortgage Backed Securities Fair Value Disclosure ResidentialMortgageBackedSecuritiesFairValueDisclosure	224209000	USD
CY2017Q3	mtg	Residential Mortgage Backed Securities Fair Value Disclosure ResidentialMortgageBackedSecuritiesFairValueDisclosure	192896000	USD
	mtg	Risktocapitalratioofcombinedinsuranceoperationsincludingreinsuranceaffiliatesatendofperiod Risktocapitalratioofcombinedinsuranceoperationsincludingreinsuranceaffiliatesatendofperiod	11.1 to 1
CY2015Q3	mtg	Shareholder Rights Accompanying Each Outstanding Share Of Common Stock ShareholderRightsAccompanyingEachOutstandingShareOfCommonStock	1	shares
CY2017Q3	mtg	Statutory Capital Requirements Risk To Capital Ratio For Combined Insurance Operations StatutoryCapitalRequirementsRiskToCapitalRatioForCombinedInsuranceOperations	11.1
CY2016Q4	mtg	Total Debt Securities Fair Value Disclosure TotalDebtSecuritiesFairValueDisclosure	4685222000	USD
CY2017Q3	mtg	Total Debt Securities Fair Value Disclosure TotalDebtSecuritiesFairValueDisclosure	4710153000	USD
CY2016Q4	mtg	Total Fair Value Of Trust Fund Assets Under Captive Agreements TotalFairValueOfTrustFundAssetsUnderCaptiveAgreements	91000000	USD
CY2017Q3	mtg	Total Fair Value Of Trust Fund Assets Under Captive Agreements TotalFairValueOfTrustFundAssetsUnderCaptiveAgreements	80000000	USD
CY2016Q3	mtg	Treasury Stock Acquired During Period Unsettled Shares At Period End TreasuryStockAcquiredDuringPeriodUnsettledSharesAtPeriodEnd	2100000	shares
CY2016Q4	mtg	Us Treasury Securities And Obligations Of Us Government Corporations And Agencies Fair Value Disclosure USTreasurySecuritiesAndObligationsOfUSGovernmentCorporationsAndAgenciesFairValueDisclosure	73530000	USD
CY2017Q3	mtg	Us Treasury Securities And Obligations Of Us Government Corporations And Agencies Fair Value Disclosure USTreasurySecuritiesAndObligationsOfUSGovernmentCorporationsAndAgenciesFairValueDisclosure	103700000	USD
CY2016Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	44073000	USD
CY2017Q3	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	42928000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-75100000	USD
CY2017Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-26097000	USD
CY2016Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1782337000	USD
CY2017Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1846260000	USD
CY2016Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	19000000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	20400000	shares
CY2017Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2016Q4	us-gaap	Assets Assets	5734529000	USD
CY2017Q3	us-gaap	Assets Assets	5675868000	USD
CY2016Q3	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	152000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	542000	USD
CY2017Q3	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	312000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	472000	USD
CY2016Q3	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	152000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	542000	USD
CY2017Q3	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	-91000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	1882000	USD
CY2016Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4717211000	USD
CY2017Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4666165000	USD
CY2016Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	4692350000	USD
CY2017Q3	us-gaap	Available For Sale Securities AvailableForSaleSecurities	4717392000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	28628000	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	69116000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax	-60600000	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax	-25100000	USD
CY2016Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	60633000	USD
CY2017Q3	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	25091000	USD
CY2016Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	4724355000	USD
CY2017Q3	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	4673367000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	9718000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	12458000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	60633000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	25091000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	2665261000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	1484130000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	50915000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	12633000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	2370345000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	1094307000	USD
CY2016Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	294916000	USD
CY2017Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	389823000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	972932000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	980813000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	1333112000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	1342110000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	1293585000	USD
CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	391087000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	395870000	shares
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	1329088000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	4092238000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	4039400000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	439771000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	440227000	USD
CY2016Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	4685222000	USD
CY2017Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	4710153000	USD
CY2016Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	7128000	USD
CY2017Q3	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	7239000	USD
CY2016Q3	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	6168000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	11677000	USD
CY2017Q3	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	32000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	861000	USD
CY2016Q3	us-gaap	Availableforsale Securities Gross Realized Losses Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	1076000	USD
	us-gaap	Availableforsale Securities Gross Realized Losses Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	2693000	USD
CY2017Q3	us-gaap	Availableforsale Securities Gross Realized Losses Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	79000	USD
	us-gaap	Availableforsale Securities Gross Realized Losses Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedLossesExcludingOtherThanTemporaryImpairments	1072000	USD
CY2016Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	607	security
CY2017Q3	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	343	security
CY2016Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	190101000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	443287000	USD
CY2017Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	85893000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	255512000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	181120000	USD
CY2016Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	274743000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	155410000	USD
CY2017Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	250701000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	93623000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	95291000	USD
CY2016Q3	us-gaap	Ceded Premiums Earned CededPremiumsEarned	33494000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	100040000	USD
CY2017Q3	us-gaap	Ceded Premiums Earned CededPremiumsEarned	31938000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	92467000	USD
CY2016Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	33446000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	99944000	USD
CY2017Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	31931000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	92436000	USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2017Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2017Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2016Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	359400000	shares
CY2017Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	370562000	shares
	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	2167000	USD
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	340663000	shares
CY2017Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	370562000	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	359400000	USD
CY2017Q3	us-gaap	Common Stock Value CommonStockValue	370562000	USD
CY2016Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	41933000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	326065000	USD
CY2017Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	131424000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	377450000	USD
CY2016Q4	us-gaap	Convertible Debt ConvertibleDebt	349461000	USD
CY2017Q3	us-gaap	Convertible Debt ConvertibleDebt	0	USD
CY2016Q4	us-gaap	Convertible Subordinated Debt ConvertibleSubordinatedDebt	256872000	USD
CY2017Q3	us-gaap	Convertible Subordinated Debt ConvertibleSubordinatedDebt	256872000	USD
CY2016Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1189500000	USD
CY2017Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	836900000	USD
CY2016Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	10800000	USD
CY2017Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	6800000	USD
CY2016Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	607655000	USD
CY2017Q3	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	416167000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	111191000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	165250000	USD
CY2016Q3	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	2575000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	6781000	USD
CY2017Q3	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	2985000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	7799000	USD
CY2016Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	17759000	USD
CY2017Q3	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	19024000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2017Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	44324000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	48882000	USD
	us-gaap	Description Of Regulatory Capital Requirements Under Insurance Regulations DescriptionOfRegulatoryCapitalRequirementsUnderInsuranceRegulations	25 to 1
CY2016Q3	us-gaap	Direct Premiums Earned DirectPremiumsEarned	270718000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	789671000	USD
CY2017Q3	us-gaap	Direct Premiums Earned DirectPremiumsEarned	268709000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	789317000	USD
CY2016Q3	us-gaap	Direct Premiums Written DirectPremiumsWritten	283618000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	831022000	USD
CY2017Q3	us-gaap	Direct Premiums Written DirectPremiumsWritten	287918000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	828986000	USD
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.68
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.32
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.91
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.58
	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	1265000	USD
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.86
CY2016Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.35
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.35
CY2017Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.35
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.35
CY2016Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	155000000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	155000000	USD
CY2017Q3	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	167200000	USD
CY2016Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	5092000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	8984000	USD
CY2017Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	-47000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-211000	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	8984000	USD
	us-gaap	Gain Loss On Sale Of Securities Net GainLossOnSaleOfSecuritiesNet	-211000	USD
CY2016Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-75223000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-90531000	USD
CY2017Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-65000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	83749000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	352676000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	184467000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	539040000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	27131000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	117646000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	64440000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	210593000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	2086000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-1145000	USD
	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	-3376000	USD
	us-gaap	Increase Decrease In Broker Dealer Related Receivables Payables Net IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet	-3738000	USD
	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	822000	USD
	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	33943000	USD
	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	-357919000	USD
	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	-333662000	USD
	us-gaap	Increase Decrease In Other Insurance Liabilities IncreaseDecreaseInOtherInsuranceLiabilities	-12800000	USD
	us-gaap	Increase Decrease In Other Insurance Liabilities IncreaseDecreaseInOtherInsuranceLiabilities	-18000000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-14337000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	9235000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-1048000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	1546000	USD
	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	2376000	USD
	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	-4615000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	41353000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	41079000	USD
CY2016Q3	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-12948000	USD
	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-41447000	USD
CY2017Q3	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-18813000	USD
	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	-41110000	USD
CY2016Q3	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	60897000	USD
	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	192499000	USD
CY2017Q3	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	29747000	USD
	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	84705000	USD
CY2016Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	13536000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	40481000	USD
CY2017Q3	us-gaap	Interest Expense Debt InterestExpenseDebt	13273000	USD
	us-gaap	Interest Expense Debt InterestExpenseDebt	43779000	USD
	us-gaap	Interest Paid InterestPaid	31500000	USD
	us-gaap	Interest Paid InterestPaid	45100000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	3185687000	USD
CY2017Q3	us-gaap	Liabilities Liabilities	2545719000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5734529000	USD
CY2017Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5675868000	USD
CY2015Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1893402000	USD
CY2016Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1535483000	USD
CY2016Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1438813000	USD
CY2017Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1105151000	USD
CY2016Q4	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	1438813000	USD
CY2017Q3	us-gaap	Liability For Claims And Claims Adjustment Expense Property Casualty Liability LiabilityForClaimsAndClaimsAdjustmentExpensePropertyCasualtyLiability	1105151000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	5942000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	5474000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	549706000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	407977000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	192499000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	84705000	USD
CY2015Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1848915000	USD
CY2016Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1488620000	USD
CY2016Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1388320000	USD
CY2017Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1059273000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	1178700000	USD
CY2017Q3	us-gaap	Long Term Debt LongTermDebt	830100000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-101336000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-158536000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	45973000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2529000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	148986000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	256356000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	56618000	USD
	us-gaap	Net Income Loss NetIncomeLoss	235030000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	120027000	USD
	us-gaap	Net Income Loss NetIncomeLoss	328447000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	58615000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	245398000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	123784000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	342333000	USD
CY2016Q3	us-gaap	Net Investment Income NetInvestmentIncome	27515000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	82572000	USD
CY2017Q3	us-gaap	Net Investment Income NetInvestmentIncome	30402000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	89595000	USD
	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	47777000	USD
CY2017Q3	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	987600000	USD
CY2016Q4	us-gaap	Other Assets OtherAssets	73345000	USD
CY2017Q3	us-gaap	Other Assets OtherAssets	82045000	USD
CY2016Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	11748000	USD
CY2017Q3	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	11728000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-14434000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	92731000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	11544000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	49414000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	241000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	722000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	147000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	442000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-10000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-974000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	0	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	31000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-22592000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	140246000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	17535000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	75387000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-14685000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	91035000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	11397000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	49003000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-7907000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	49211000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	6138000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	26384000	USD
CY2016Q3	us-gaap	Other Income OtherIncome	3867000	USD
	us-gaap	Other Income OtherIncome	14234000	USD
CY2017Q3	us-gaap	Other Income OtherIncome	2922000	USD
	us-gaap	Other Income OtherIncome	7846000	USD
CY2016Q4	us-gaap	Other Liabilities OtherLiabilities	238398000	USD
CY2017Q3	us-gaap	Other Liabilities OtherLiabilities	239609000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	681000	USD
CY2016	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	0	USD
CY2016Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2017Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2016Q3	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	37870000	USD
	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	112995000	USD
CY2017Q3	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	39888000	USD
	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	119164000	USD
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	552794000	USD
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	413752000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	91597000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	938000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1630000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5007000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	6782000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1105995000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	774985000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	4315000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Equity PaymentsToAcquireAvailableForSaleSecuritiesEquity	58000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4969000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	12121000	USD
CY2016Q3	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	69579000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	216874000	USD
CY2017Q3	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	35313000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	99122000	USD
CY2016Q3	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	237376000	USD
	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	690173000	USD
CY2017Q3	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	237083000	USD
	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	697322000	USD
CY2016Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	52392000	USD
CY2017Q3	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	53938000	USD
CY2016Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	250324000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	731620000	USD
CY2017Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	255896000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	738432000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	573094000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	150000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	432557000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	547699000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	718894000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	233198000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	6425000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Equity ProceedsFromSaleOfAvailableForSaleSecuritiesEquity	0	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	36088000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	43157000	USD
	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-1226000	USD
CY2016Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	241000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	141800000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	28900000	USD
CY2017Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	-97000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	69000	USD
CY2016Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	8923000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	25056000	USD
CY2017Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	5469000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	14486000	USD
CY2015Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	44487000	USD
CY2016Q3	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	46863000	USD
CY2016Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	50493000	USD
CY2017Q3	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	45878000	USD
CY2016Q4	us-gaap	Reinsurance Recoverables On Paid Losses ReinsuranceRecoverablesOnPaidLosses	4964000	USD
CY2017Q3	us-gaap	Reinsurance Recoverables On Paid Losses ReinsuranceRecoverablesOnPaidLosses	4638000	USD
	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	363778000	USD
	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	145620000	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	150000000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	632564000	USD
CY2017Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	939424000	USD
CY2016Q3	us-gaap	Revenues Revenues	273850000	USD
	us-gaap	Revenues Revenues	795963000	USD
CY2017Q3	us-gaap	Revenues Revenues	270360000	USD
	us-gaap	Revenues Revenues	794552000	USD
CY2016Q4	us-gaap	Senior Notes SeniorNotes	417406000	USD
CY2017Q3	us-gaap	Senior Notes SeniorNotes	418271000	USD
CY2016Q3	us-gaap	Stockholders Equity StockholdersEquity	2583079000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	2548842000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	3130149000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	292090000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	219485000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-100000000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-99591000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-134780000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-135000000	USD
	us-gaap	Tax Adjustments Settlements And Unusual Provisions TaxAdjustmentsSettlementsAndUnusualProvisions	28400000	USD
CY2016Q3	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	8.02
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	18737000	shares
CY2017Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	0	shares
CY2016Q4	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	4800000	shares
CY2016Q3	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	13500000	shares
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	150359000	USD
CY2017Q3	us-gaap	Treasury Stock Value TreasuryStockValue	0	USD
CY2016Q4	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	16500000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	108100000	USD
CY2016Q4	us-gaap	Unearned Premiums UnearnedPremiums	329737000	USD
CY2017Q3	us-gaap	Unearned Premiums UnearnedPremiums	370816000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	50800000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	119800000	USD
CY2016Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	406050000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	421423000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	349376000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	343403000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	370586000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	359613000	shares
	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:8px;text-align:justify;padding-left:12px;font-size:12pt;"><font style="font-family:Roboto Black,sans-serif;font-size:12pt;font-style:normal;font-weight:bold;text-decoration:none;">New Accounting Pronouncements</font></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;padding-left:12px;font-size:10pt;"><font style="font-family:Roboto,sans-serif;font-size:10pt;font-weight:bold;">Adopted Accounting Standards</font></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;padding-left:12px;font-size:10pt;"><font style="font-family:Roboto,sans-serif;font-size:10pt;font-style:italic;">Improvements to Employee Share-Based Compensation Accounting</font></div><div style="line-height:120%;padding-top:8px;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">In March 2016, the Financial Accounting Standards Board (“FASB”) issued updated guidance that simplifies several aspects of the accounting for employee share-based compensation including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification of related amounts within the statement of cash flows. The updated guidance requires that, prospectively, all tax effects related to share-based compensation be made through the statement of operations at the time of settlement. In contrast, the previous guidance required excess tax benefits to be recognized in paid-in capital. The updated guidance also removes the requirement to delay recognition of a tax benefit until it reduces current taxes payable. This change is required to be applied on a modified retrospective basis, with a cumulative effect adjustment to opening retained earnings. Additionally, all tax related cash flows resulting from share-based compensation are to be reported as operating activities on the statement of cash flows, a change from the existing requirement to present tax benefits as an inflow from financing activities and an outflow from operating activities. Finally, for tax withholding purposes, entities will be allowed to withhold an amount of shares up to the employee’s maximum individual tax rate (as opposed to the minimum statutory tax rate) in the relevant jurisdiction without resulting in liability classification of the award. The change in tax withholding is to be applied on a modified retrospective approach. This updated guidance became effective January 1, 2017. We adopted this guidance in the first quarter of 2017 and because of the adoption:</font></div><table cellpadding="0" cellspacing="0" style="padding-top:8px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:36px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9.5pt;padding-left:24px;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">We recognized discrete tax benefits of </font><font style="font-family:Roboto;font-size:9.5pt;">$1.5 million</font><font style="font-family:Roboto,sans-serif;font-size:9.5pt;"> in the provision for income taxes on our statement of operations for the nine months ended September 30, 2017 related to excess tax benefits upon vesting of share-based awards during the period.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:8px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:36px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9.5pt;padding-left:24px;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">We recognized a cumulative effect adjustment in opening retained earnings as of January 1, 2017 related to the recognition of a deferred tax asset related to suspended tax benefits from vesting transactions occurring in prior years and from the elimination of our forfeiture estimate on share-based awards, which was previously applied only to awards with service conditions.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:8px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:36px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9.5pt;padding-left:24px;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">We reclassified excess tax benefits related to share-based compensation for 2016 to operating activities from financing activities.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:8px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:36px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9.5pt;padding-left:24px;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">•</font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">We reclassified employee taxes paid for withheld shares for 2016 to financing activities from operating activities.</font></div></td></tr></table><div style="line-height:120%;padding-bottom:0px;text-align:justify;padding-left:12px;font-size:10pt;"><font style="font-family:Roboto,sans-serif;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;padding-left:12px;font-size:10pt;"><font style="font-family:Roboto,sans-serif;font-size:10pt;font-weight:bold;">Prospective Accounting Standards</font></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;padding-left:12px;font-size:10pt;"><font style="font-family:Roboto,sans-serif;font-size:10pt;font-style:italic;">Stock Compensation - Scope of Modification Accounting</font></div><div style="line-height:120%;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">In May 2017, the FASB issued updated guidance related to a change in the terms or conditions (modification) of a share-based award. The updated guidance provides that an entity should account for the effects of a modification unless the fair value and vesting conditions of the modified award and the classification of the award (equity or liability instrument) are the same as the original award immediately before the modification. The updated guidance addresses the current diversity in practice on applying modification accounting, as some entities evaluate whether changes to awards are substantive, which is not prescribed within the current accounting guidance. The updated guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those annual periods. Early adoption is permitted, including adoption in any interim period. We are currently evaluating the impacts the adoption of this guidance will have on our consolidated financial statements, but do not expect it to have a material impact on our consolidated financial statements or disclosures.</font></div><div style="line-height:120%;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;"><br clear="none"/></font></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;padding-left:12px;font-size:10pt;"><font style="font-family:Roboto,sans-serif;font-size:10pt;font-style:italic;">Premium Amortization on Purchased Callable Debt Securities</font></div><div style="line-height:120%;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">In March 2017, the FASB issued updated guidance to amend the amortization period for certain purchased callable debt securities held at a premium shortening the amortization period to the earliest call date. Under current GAAP, there is diversity in practice in the amortization period for premiums of callable debt securities and in how the potential for exercise of a call is factored into current impairment assessments. This updated guidance aligns with how callable debt securities, in the United States, are generally quoted, priced, and traded assuming a model that incorporates consideration of calls (also referred to as “yield-to-worst” pricing). The updated guidance is effective for annual periods beginning after December 15, 2018, including interim periods within those annual periods. We are currently evaluating the impacts the adoption of this guidance will have on our consolidated financial statements, but do not expect it to have a material impact on our consolidated financial statements or disclosures. We currently account for premium amortization on our purchased callable debt securities on a yield-to-worst basis, which generally aligns with the earliest call date. </font></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;padding-left:12px;font-size:10pt;"><font style="font-family:Roboto,sans-serif;font-size:10pt;font-style:italic;">Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost</font></div><div style="line-height:120%;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">In March 2017, the FASB issued updated guidance that improves the reporting of net benefit cost in the financial statements. The updated guidance requires that an employer report the service cost component in the same financial statement caption as other compensation costs arising from services rendered by employees during the period. The other components of net benefit cost are required to be presented in the statement of operations separately from the service cost component and outside a subtotal of income from operations, if one is presented. Current guidance does not prescribe where the amount of net benefit cost should be presented in an employer’s statement of operations and does not require entities to disclose by line item the amount of net benefit cost that is included in the statement of operations. The updated guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those annual periods. We are currently evaluating the impacts the adoption of this guidance will have on our consolidated financial statements, but do not expect it to have a material impact on our consolidated financial statements or disclosures. </font></div><div style="line-height:120%;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;"><br clear="none"/></font></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;padding-left:12px;font-size:10pt;"><font style="font-family:Roboto,sans-serif;font-size:10pt;font-style:italic;">Measurement of Credit Losses on Financial Instruments</font></div><div style="line-height:120%;padding-top:8px;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">In June 2016, the FASB issued updated guidance that requires immediate recognition of estimated credit losses expected to occur over the remaining life of many financial instruments. Entities will be required to utilize a current expected credit losses (“CECL”) methodology that incorporates their forecasts of future economic conditions into their loss estimate unless such forecast is not reasonable and supportable, in which case the entity will revert to historical loss experience. Any allowance for CECL reduces the amortized cost basis of the financial instrument to the amount an entity expects to collect. Credit losses relating to available-for-sale fixed maturity securities are to be recorded through an allowance for credit losses, rather than a write-down of the asset, with the amount of the allowance limited to the amount by which fair value is less than amortized cost. In addition, the length of time a security has been in an unrealized loss position will no longer impact the determination of whether a credit loss exists. The updated guidance is not prescriptive about certain aspects of estimating expected credit losses, including the specific methodology to use, and therefore will require significant judgment in application. The updated guidance is effective for annual periods beginning after December 15, 2019, including interim periods within those annual periods. Early adoption is permitted for annual and interim periods in fiscal years beginning after December 15, 2018. We are currently evaluating the impacts the adoption of this guidance will have on our consolidated financial statements, but do not expect it to have a material impact on our consolidated financial statements or disclosures.</font></div><div style="line-height:120%;padding-top:8px;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;"><br clear="none"/></font></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;padding-left:12px;font-size:10pt;"><font style="font-family:Roboto,sans-serif;font-size:10pt;font-style:italic;">Recognition and Measurement of Financial Assets and Financial Liabilities</font></div><div style="line-height:120%;padding-top:8px;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">In January 2016, the FASB issued updated guidance to address the recognition, measurement, presentation, and disclosure of certain financial instruments. The updated guidance requires equity investments, except those accounted for under the equity method of accounting, that have a readily determinable fair value to be measured at fair value with changes in fair value recognized in net income. Equity investments that do not have readily determinable fair values may be remeasured at fair value either upon the occurrence of an observable price change or upon identification of an impairment. A qualitative assessment for impairment is required for equity investments without readily determinable fair values. The updated guidance also eliminates the requirement to disclose the method and significant assumptions used to estimate the fair value of financial instruments measured at amortized cost on the balance sheet. Further, the updated guidance clarifies that entities should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entities other deferred tax assets. The updated guidance is effective for annual periods beginning after December 15, 2017, including interim periods within those annual periods and will require recognition of a cumulative effect adjustment at adoption. We do not currently expect the adoption of this guidance to impact our consolidated financial statements or disclosures.</font></div></div>
	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">The following table provides a reconciliation of beginning and ending loss reserves as of and for the </font><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">nine</font><font style="font-family:Roboto,sans-serif;font-size:9.5pt;"> months ended </font><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">September 30, 2017</font><font style="font-family:Roboto,sans-serif;font-size:9.5pt;"> and </font><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">2016</font><font style="font-family:Roboto,sans-serif;font-size:9.5pt;">:</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;padding-left:12px;text-indent:0px;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:96.61835748792271%;border-collapse:collapse;text-align:left;"><tr><td colspan="9" rowspan="1"></td></tr><tr><td style="width:56%;" rowspan="1" colspan="1"></td><td style="width:2%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:18%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:2%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td><td style="width:18%;" rowspan="1" colspan="1"></td><td style="width:1%;" rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Nine months ended September 30,</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-style:italic;">(In thousands)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">2017</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:center;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">2016</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Reserve at beginning of period</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">1,438,813</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">1,893,402</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Less reinsurance recoverable</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">50,493</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">44,487</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Net reserve at beginning of period</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">1,388,320</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">1,848,915</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Losses incurred:</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td colspan="9" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Losses and LAE incurred in respect of default notices received in:</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Current year</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">219,485</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">292,090</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Prior years </font><font style="font-family:Roboto,sans-serif;font-size:8pt;"><sup style="vertical-align:top;line-height:120%;font-size:pt">(1)</sup></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">(134,780</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">)</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">(99,591</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">)</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Total losses incurred</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">84,705</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">192,499</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;height:5px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Losses paid:</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td></tr><tr><td colspan="9" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Losses and LAE paid in respect of default notices received in:</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Current year</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">5,474</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">5,942</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Prior years</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">407,977</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">549,706</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Reinsurance terminations </font><font style="font-family:Roboto,sans-serif;font-size:8pt;"><sup style="vertical-align:top;line-height:120%;font-size:pt">(2)</sup></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">301</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">(2,854</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-right:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">)</font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:28px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Total losses paid</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">413,752</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">552,794</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Net reserve at end of period</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">1,059,273</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">1,488,620</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #d0d0ce;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Plus reinsurance recoverables</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">45,878</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">46,863</font></div></td><td style="vertical-align:bottom;border-bottom:1px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:2px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">Reserve at end of period</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">$</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #003b5c;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;font-weight:bold;">1,105,151</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;" rowspan="1" colspan="1"><div style="overflow:hidden;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"> </font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #003b5c;padding-left:2px;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:left;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">$</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #003b5c;padding-top:2px;padding-bottom:2px;" rowspan="1" colspan="1"><div style="text-align:right;font-size:8pt;"><font style="font-family:Roboto,sans-serif;font-size:8pt;">1,535,483</font></div></td><td style="vertical-align:bottom;border-bottom:2px solid #003b5c;" rowspan="1" colspan="1"><div style="text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></td></tr></table></div></div><table cellpadding="0" cellspacing="0" style="padding-top:8px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9pt;padding-left:12px;"><font style="font-family:Roboto,sans-serif;font-size:9pt;"><sup style="vertical-align:top;line-height:120%;font-size:pt">(1)</sup> </font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:9pt;"><font style="font-family:Roboto,sans-serif;font-size:9pt;">A negative number for prior year losses incurred indicates a redundancy of prior year loss reserves. See the following table for more information about prior year loss development.</font></div></td></tr></table><table cellpadding="0" cellspacing="0" style="padding-top:8px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;" rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td style="vertical-align:top" rowspan="1" colspan="1"><div style="line-height:120%;font-size:9pt;padding-left:12px;"><font style="font-family:Roboto,sans-serif;font-size:9pt;"><sup style="vertical-align:top;line-height:120%;font-size:pt">(2)</sup> </font></div></td><td style="vertical-align:top;" rowspan="1" colspan="1"><div style="line-height:120%;text-align:justify;font-size:9pt;"><font style="font-family:Roboto,sans-serif;font-size:9pt;">In a termination, the reinsurance agreement is cancelled, with no future premium ceded and amounts for any incurred but unpaid losses paid to us. Amounts paid to (received from) reinsurers result in an increase (decrease) in net losses paid. The change in net losses paid on our losses incurred is offset by a corresponding change in the reinsurance recoverable, resulting in no net impact on losses incurred.</font></div></td></tr></table><div style="line-height:120%;text-align:justify;padding-left:12px;text-indent:0px;font-size:9.5pt;"><font style="font-family:Roboto,sans-serif;font-size:9.5pt;"><br clear="none"/></font></div></div>

Files In Submission

Name	View Source	Status
0000876437-17-000056-index-headers.html	Edgar Link	pending
0000876437-17-000056-index.html	Edgar Link	pending
0000876437-17-000056.txt	Edgar Link	pending
0000876437-17-000056-xbrl.zip	Edgar Link	pending
exhibit12q3_2017.htm	Edgar Link	pending
exhibit311q3_2017.htm	Edgar Link	pending
exhibit312q3_2017.htm	Edgar Link	pending
exhibit32q3_2017.htm	Edgar Link	pending
exhibit99q3_2017.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
investorlogoa06.jpg	Edgar Link	pending
mtg-093017x10q.htm	Edgar Link	pending
mtg-093017x_chartx09572a01.jpg	Edgar Link	pending
mtg-093017x_chartx14758a01.jpg	Edgar Link	pending
mtg-093017x_chartx15435a01.jpg	Edgar Link	pending
mtg-093017x_chartx16284a01.jpg	Edgar Link	pending
mtg-093017x_chartx17055a01.jpg	Edgar Link	pending
mtg-093017x_chartx18006a01.jpg	Edgar Link	pending
mtg-093017x_chartx18920a01.jpg	Edgar Link	pending
mtg-093017x_chartx19818a01.jpg	Edgar Link	pending
mtg-093017x_chartx20862a01.jpg	Edgar Link	pending
mtg-093017x_chartx21843a01.jpg	Edgar Link	pending
mtg-093017x_chartx22606a01.jpg	Edgar Link	pending
mtg-093017x_chartx42053.jpg	Edgar Link	pending
mtg-20170930.xml	Edgar Link	completed
mtg-20170930.xsd	Edgar Link	pending
mtg-20170930_cal.xml	Edgar Link	unprocessable
mtg-20170930_def.xml	Edgar Link	unprocessable
mtg-20170930_lab.xml	Edgar Link	unprocessable
mtg-20170930_pre.xml	Edgar Link	unprocessable
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$MTG
MGIC INVESTMENT CORP Stock $mtg

2017 Q4 Form 10-Q Financial Statement

#000087643717000056 Filed on November 07, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MTG MGIC INVESTMENT CORP Stock $mtg

2017 Q4 Form 10-Q Financial Statement

#000087643717000056 Filed on November 07, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MTG
MGIC INVESTMENT CORP Stock $mtg