$MTG
MGIC INVESTMENT CORP Stock $mtg

$mtg Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000087643720000040 Filed on November 04, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q3
Revenue	$36.12M	$296.0M	$318.4M
YoY Change	-12.59%	-7.03%	9.62%
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	$17.10M	$3.278M	$3.142M
YoY Change	31.54%	4.33%	-0.44%
% of Gross Profit
Operating Expenses	$94.10M	$89.30M	$82.30M
YoY Change	23.82%	8.51%	81.68%
Operating Profit
YoY Change
Interest Expense	-$18.00M	-$15.70M	-$12.90M
YoY Change	39.53%	21.71%	-3.01%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$190.2M	$164.3M	$223.1M
YoY Change	-14.59%	-26.35%	-3.78%
Income Tax	$38.78M	$33.52M	$46.19M
% Of Pretax Income	20.39%	20.4%	20.7%
Net Earnings	$151.4M	$130.8M	$176.9M
YoY Change	-14.5%	-26.07%	-2.73%
Net Earnings / Revenue	419.26%	44.19%	55.57%
Basic Earnings Per Share	$0.45	$0.39	$0.50
Diluted Earnings Per Share	$0.44	$0.38	$0.49
COMMON SHARES
Basic Shares Outstanding	338.6M shares	338.6M shares	351.5M shares
Diluted Shares Outstanding		357.2M shares	372.6M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$288.0M	$380.1M	$165.4M
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	$47.14M	$47.55M	$50.54M
YoY Change	-5.94%	-5.92%	0.97%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$6.683B	$6.366B	$5.681B
YoY Change	16.06%	12.06%	14.08%
Other Assets	$9.000M	$9.000M	$18.00M
YoY Change	-30.77%	-50.0%	-83.93%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$7.355B	$7.150B	$6.147B
YoY Change	18.06%	16.31%	8.66%
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	$1.243B	$1.243B	$832.0M
YoY Change	49.22%	49.4%	0.12%
Other Long-Term Liabilities	$245.0M	$238.0M	$160.0M
YoY Change	61.18%	48.75%	-23.08%
Total Long-Term Liabilities	$1.488B	$1.481B	$992.0M
YoY Change	51.07%	49.29%	-4.52%
TOTAL LIABILITIES
Total Short-Term Liabilities
Total Long-Term Liabilities	$1.488B	$1.481B	$992.0M
Total Liabilities	$2.656B	$2.636B	$1.987B
YoY Change	38.29%	32.65%	-8.32%
SHAREHOLDERS EQUITY
Retained Earnings	$2.642B	$2.511B	$2.123B
YoY Change	15.95%	18.3%	42.51%
Common Stock	$2.233B	$2.228B	$2.236B
YoY Change	-0.34%	-0.38%	0.33%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$393.3M	$393.3M	$263.2M
YoY Change	38.89%	49.44%	163.04%
Treasury Stock Shares	32.78M shares	32.78M shares	22.64M shares
Shareholders Equity	$4.699B	$4.514B	$4.160B
YoY Change
Total Liabilities & Shareholders Equity	$7.355B	$7.150B	$6.147B
YoY Change	18.06%	16.31%	8.66%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q3
OPERATING ACTIVITIES
Net Income	$151.4M	$130.8M	$176.9M
YoY Change	-14.5%	-26.07%	-2.73%
Depreciation, Depletion And Amortization	$17.10M	$3.278M	$3.142M
YoY Change	31.54%	4.33%	-0.44%
Cash From Operating Activities	$223.4M	$88.80M	$176.6M
YoY Change	47.65%	-49.72%	46.07%
INVESTING ACTIVITIES
Capital Expenditures	-$1.100M	-$1.300M	-$800.0K
YoY Change	-26.67%	62.5%	-66.67%
Acquisitions
YoY Change
Other Investing Activities	-$293.4M	-$429.3M	-$138.9M
YoY Change	162.9%	209.07%	220.05%
Cash From Investing Activities	-$294.4M	-$430.6M	-$139.8M
YoY Change	160.3%	208.01%	205.24%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-21.20M	359.3M	-90.30M
YoY Change	-48.17%	-497.9%	90200.0%
NET CHANGE
Cash From Operating Activities	223.4M	88.80M	176.6M
Cash From Investing Activities	-294.4M	-430.6M	-139.8M
Cash From Financing Activities	-21.20M	359.3M	-90.30M
Net Change In Cash	-92.20M	17.50M	-53.50M
YoY Change	3314.81%	-132.71%	-171.33%
FREE CASH FLOW
Cash From Operating Activities	$223.4M	$88.80M	$176.6M
Capital Expenditures	-$1.100M	-$1.300M	-$800.0K
Free Cash Flow	$224.5M	$90.10M	$177.4M
YoY Change	46.92%	-49.21%	43.88%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	18531000	USD
	dei	Entity Central Index Key EntityCentralIndexKey	0000876437
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	338573493	shares
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	6037701000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5562550000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	362000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	17486000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	17188000	USD
CY2020Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2020Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2020Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	371353000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	371353000	shares
CY2020Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	338567000	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	347308000	shares
CY2020Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	32779000	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	24045000	shares
CY2019	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	0	USD
CY2020Q2	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0.0	shares
CY2020Q3	mtg	Statutory Capital Requirements Risk To Capital Ratio For Combined Insurance Operations StatutoryCapitalRequirementsRiskToCapitalRatioForCombinedInsuranceOperations	9.4
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-10816
	dei	Entity Registrant Name EntityRegistrantName	MGIC Investment Corp
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	WI
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	39-1486475
	dei	Entity Address Address Line1 EntityAddressAddressLine1	250 E. Kilbourn Avenue
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	53202
	dei	Entity Address City Or Town EntityAddressCityOrTown	Milwaukee,
	dei	Entity Address State Or Province EntityAddressStateOrProvince	WI
	dei	City Area Code CityAreaCode	(414)
	dei	Local Phone Number LocalPhoneNumber	347-6480
	dei	Security12b Title Security12bTitle	Common stock
	dei	Trading Symbol TradingSymbol	MTG
	dei	Security Exchange Name SecurityExchangeName	NYSE
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2020Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	338573493	shares
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CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	17328000	USD
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CY2019Q4	us-gaap	Other Investments OtherInvestments	3100000	USD
CY2020Q3	us-gaap	Investments Investments	6365878000	USD
CY2019Q4	us-gaap	Investments Investments	5758320000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	380055000	USD
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CY2020Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	8755000	USD
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CY2020Q3	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	83143000	USD
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CY2019Q4	us-gaap	Reinsurance Recoverables On Paid Losses ReinsuranceRecoverablesOnPaidLosses	1521000	USD
CY2020Q3	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	53971000	USD
CY2019Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	55587000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	47546000	USD
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CY2020Q3	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	21238000	USD
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CY2020Q3	us-gaap	Senior Notes SeniorNotes	878838000	USD
CY2019Q4	us-gaap	Senior Notes SeniorNotes	420867000	USD
CY2020Q3	us-gaap	Convertible Subordinated Debt ConvertibleSubordinatedDebt	208814000	USD
CY2019Q4	us-gaap	Convertible Subordinated Debt ConvertibleSubordinatedDebt	256872000	USD
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CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	151962000	USD
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CY2020Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
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CY2020Q3	us-gaap	Treasury Stock Value TreasuryStockValue	393326000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	283196000	USD
CY2020Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	167777000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	72708000	USD
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CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	4513622000	USD
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	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	8895000	USD
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CY2020Q3	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	28159000	USD
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	us-gaap	Increase Decrease In Unearned Premiums Net IncreaseDecreaseInUnearnedPremiumsNet	65230000	USD
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	us-gaap	Other Income OtherIncome	7160000	USD
	us-gaap	Other Income OtherIncome	7921000	USD
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	us-gaap	Revenues Revenues	896865000	USD
	us-gaap	Revenues Revenues	902350000	USD
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	us-gaap	Interest Expense Debt InterestExpenseDebt	39722000	USD
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	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.40
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CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33518000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	46186000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	74388000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	128614000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	130811000	USD
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	us-gaap	Net Income Loss NetIncomeLoss	294663000	USD
	us-gaap	Net Income Loss NetIncomeLoss	496653000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
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	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.36
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	338598000	shares
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	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	354272000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	357195000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	372575000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	360389000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	375266000	shares
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	130811000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	176934000	USD
	us-gaap	Net Income Loss NetIncomeLoss	294663000	USD
	us-gaap	Net Income Loss NetIncomeLoss	496653000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	33712000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	31372000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	104308000	USD
	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	183197000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	11347000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-1600000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	9239000	USD
	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-4799000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	22365000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	32972000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	95069000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	187996000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	153176000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	209906000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	389732000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	684649000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	4513622000	USD
	mtg	Increase Decrease In Reinsurance Recoverable On Paid Losses IncreaseDecreaseInReinsuranceRecoverableOnPaidLosses	459000	USD
	mtg	Increase Decrease In Reinsurance Recoverable On Paid Losses IncreaseDecreaseInReinsuranceRecoverableOnPaidLosses	1375000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-1616000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	4159617000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	4513622000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	4159617000	USD
	us-gaap	Net Income Loss NetIncomeLoss	294663000	USD
	us-gaap	Net Income Loss NetIncomeLoss	496653000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	40660000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	35778000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	28427000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7628000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-26736000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	10851000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	3986000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-1923000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	319000	USD
	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	61502000	USD
	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	-13762000	USD
	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-3286000	USD
	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	2707000	USD
	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	122000	USD
	mtg	Increase Decrease In Profit Commission Receivable IncreaseDecreaseInProfitCommissionReceivable	-13909000	USD
	mtg	Increase Decrease In Profit Commission Receivable IncreaseDecreaseInProfitCommissionReceivable	-3868000	USD
	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	285115000	USD
	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	-71722000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-65231000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-17429000	USD
	us-gaap	Increase Decrease In Other Insurance Liabilities IncreaseDecreaseInOtherInsuranceLiabilities	-300000	USD
	us-gaap	Increase Decrease In Other Insurance Liabilities IncreaseDecreaseInOtherInsuranceLiabilities	-9600000	USD
	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-40855000	USD
	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-8765000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	3209000	USD
	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-7756000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	508853000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	458163000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	1994286000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	1043003000	USD
	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	741732000	USD
	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	201369000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	776709000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	536747000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2214000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4079000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-478059000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-308966000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	640250000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Early Repayment Of Senior Debt EarlyRepaymentOfSeniorDebt	179735000	USD
	us-gaap	Early Repayment Of Senior Debt EarlyRepaymentOfSeniorDebt	0	USD
	mtg	Payment Of Original Issue Discount Senior Notes PaymentOfOriginalIssueDiscountSeniorNotes	2969000	USD
	mtg	Payment Of Original Issue Discount Senior Notes PaymentOfOriginalIssueDiscountSeniorNotes	0	USD
	us-gaap	Early Repayment Of Subordinated Debt EarlyRepaymentOfSubordinatedDebt	36392000	USD
	us-gaap	Early Repayment Of Subordinated Debt EarlyRepaymentOfSubordinatedDebt	0	USD
	mtg	Payment Of Original Issue Discount Convertible Junior Subordinated Debentures PaymentOfOriginalIssueDiscountConvertibleJuniorSubordinatedDebentures	15049000	USD
	mtg	Payment Of Original Issue Discount Convertible Junior Subordinated Debentures PaymentOfOriginalIssueDiscountConvertibleJuniorSubordinatedDebentures	0	USD
	mtg	Gain Loss On Debt Extinghuishment Cash Portion GainLossOnDebtExtinghuishmentCashPortion	25266000	USD
	mtg	Gain Loss On Debt Extinghuishment Cash Portion GainLossOnDebtExtinghuishmentCashPortion	0	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1197000	USD
	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	119997000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	105766000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	61745000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20989000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	8940000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5726000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	188960000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-132481000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	219754000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	16716000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	169056000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	155038000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	388810000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	171754000	USD
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-bottom:3pt;text-align:justify"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:9pt;font-weight:700;line-height:120%">Reclassifications</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Certain reclassifications to 2019 amounts have been made in the accompanying financial statements to conform to the 2020 presentation.</span></div>
CY2020Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	400000	USD
CY2020Q3	us-gaap	Long Term Debt LongTermDebt	1242700000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	832700000	USD
	us-gaap	Interest Paid InterestPaid	44200000	USD
	us-gaap	Interest Paid InterestPaid	38500000	USD
CY2020Q3	us-gaap	Direct Premiums Earned DirectPremiumsEarned	300557000	USD
CY2019Q3	us-gaap	Direct Premiums Earned DirectPremiumsEarned	294909000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	896346000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	861705000	USD
CY2020Q3	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	2729000	USD
CY2019Q3	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	1388000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	8719000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	3275000	USD
CY2020Q3	us-gaap	Ceded Premiums Earned CededPremiumsEarned	47173000	USD
CY2019Q3	us-gaap	Ceded Premiums Earned CededPremiumsEarned	28440000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	144489000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	100260000	USD
CY2020Q3	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	256113000	USD
CY2019Q3	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	267857000	USD
	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	760576000	USD
	us-gaap	Premiums Earned Net Property And Casualty PremiumsEarnedNetPropertyAndCasualty	764720000	USD
CY2020Q3	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	61164000	USD
CY2019Q3	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	36755000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	383950000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	102835000	USD
CY2020Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	229000	USD
CY2019Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	-34000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	528000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	-110000	USD
CY2020Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	20707000	USD
CY2019Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	2736000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	65462000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	7841000	USD
CY2020Q3	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	40686000	USD
CY2019Q3	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	33985000	USD
	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	319016000	USD
	us-gaap	Incurred Claims Property Casualty And Liability IncurredClaimsPropertyCasualtyAndLiability	94884000	USD
CY2019	mtg	Average Paid Claims Reduction Due To Curtailments AveragePaidClaimsReductionDueToCurtailments	0.050
	mtg	Average Paid Claims Reduction Due To Curtailments AveragePaidClaimsReductionDueToCurtailments	0.035
CY2020Q3	mtg	Maximum Exposure Associated With Other Discussions Legal Proceedings MaximumExposureAssociatedWithOtherDiscussionsLegalProceedings	40000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	130811000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	176934000	USD
	us-gaap	Net Income Loss NetIncomeLoss	294663000	USD
	us-gaap	Net Income Loss NetIncomeLoss	496653000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	338598000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	351475000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	340408000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	354272000	shares
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.50
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.87
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.40
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	130811000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	176934000	USD
	us-gaap	Net Income Loss NetIncomeLoss	294663000	USD
	us-gaap	Net Income Loss NetIncomeLoss	496653000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	134972000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	181500000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	307956000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	510351000	USD
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	340408000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	338598000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	351475000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	375266000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	354272000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	357195000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	372575000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	360389000	shares
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.85
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.36
CY2020Q3	us-gaap	Assets Held By Insurance Regulators AssetsHeldByInsuranceRegulators	14100000	USD
CY2019Q4	us-gaap	Assets Held By Insurance Regulators AssetsHeldByInsuranceRegulators	13900000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	437605000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	440557000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	1993330000	USD
CY2020Q3	mtg	Real Estate Assets Acquired Fair Value Disclosure RealEstateAssetsAcquiredFairValueDisclosure	1690000	USD
CY2020Q3	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	6744540000	USD
CY2019Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	164693000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	2077983000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	1152214000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	1256504000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	1283240000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	1380468000	USD
CY2020Q3	mtg	Available For Sale Securities Debt Maturities With Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateAmortizedCost	4866389000	USD
CY2020Q3	mtg	Available For Sale Securities Debt Maturities With Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateFairValue	5155512000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	6037701000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	6344718000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Period Increase Decrease DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease	400000	USD
	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Period Increase Decrease DebtSecuritiesAvailableForSaleAllowanceForCreditLossPeriodIncreaseDecrease	400000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	17486000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	587000	USD
CY2019Q4	mtg	Real Estate Assets Acquired Fair Value Disclosure RealEstateAssetsAcquiredFairValueDisclosure	7252000	USD
CY2019Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	5927165000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	13000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	18060000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	17188000	USD
CY2019	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	154000	USD
CY2019	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	14000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	17328000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	100000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	400000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	200000	USD
	mtg	Federal Home Loan Bank Advances Collateral Market Value Of Principal Percent FederalHomeLoanBankAdvancesCollateralMarketValueOfPrincipalPercent	1.02
CY2020Q3	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	165700000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	659770000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	6805000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	154764000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1962000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	814534000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	8767000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	624334000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	5426000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	379411000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	4476000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1003745000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	9902000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	400000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	197	security
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	217	security
CY2020Q3	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	380072000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	28310000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	41736000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	120341000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	237969000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	5945000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	25272000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	8764000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	49973000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	22365000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	32972000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	95069000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	187996000	USD
	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	98757000	USD
	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	3688000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	17300000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-47800000	USD
	mtg	Percentage Of Prior Year Default Inventory Resolved PercentageOfPriorYearDefaultInventoryResolved	0.61
	mtg	Percentage Of Prior Year Default Inventory Resolved PercentageOfPriorYearDefaultInventoryResolved	0.61
CY2020Q3	mtg	Premium Refund Liability Expected Claim Payments PremiumRefundLiabilityExpectedClaimPayments	29000000	USD
CY2019Q4	mtg	Premium Refund Liability Expected Claim Payments PremiumRefundLiabilityExpectedClaimPayments	30000000	USD
	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<div style="text-align:justify"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Table 11.1 provides a reconciliation of beginning and ending loss reserves as of and for the nine months ended September 30, 2020 and 2019.</span></div><div style="margin-bottom:14pt;margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;vertical-align:top;width:100.000%"><tr><td style="width:1.0%"/><td style="width:4.647%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:66.716%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.518%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.400%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.518%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:11.401%"/><td style="width:0.1%"/></tr><tr><td colspan="18" style="padding:2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Development of reserves for losses and loss adjustment expenses</span></td></tr><tr><td colspan="3" style="border-top:1pt solid #b9d9eb;padding:2px 1pt;text-align:left;vertical-align:middle"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:7pt;font-weight:700;line-height:100%">Table</span></td><td colspan="3" style="border-top:1pt solid #b9d9eb;padding:2px 1pt;text-align:left;vertical-align:middle"><div><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:7pt;font-weight:700;line-height:100%">11.1</span></div></td><td colspan="3" style="border-top:1pt solid #b9d9eb;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #b9d9eb;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #b9d9eb;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #b9d9eb;padding:0 1pt"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Nine Months Ended September 30,</span></td></tr><tr><td colspan="6" style="border-bottom:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-style:italic;font-weight:400;line-height:100%">(In thousands)</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2020</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">2019</span></td></tr><tr><td colspan="6" style="border-bottom:1pt solid #d0d0ce;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Reserve at beginning of period</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">555,334</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">674,019 </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #000000;border-top:1pt solid #d0d0ce;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Less reinsurance recoverable</span></td><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">21,641</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">33,328 </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #d0d0ce;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Net reserve at beginning of period</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">533,693</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">640,691 </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr style="height:3pt"><td colspan="6" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #d0d0ce;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Losses incurred:</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #d0d0ce;border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 6.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Losses and LAE incurred in respect of delinquency notices received in:</span></td><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #d0d0ce;border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 18pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Current year</span></td><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">301,699</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">142,644 </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #000000;border-top:1pt solid #d0d0ce;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:18pt"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Prior years </span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:5.2pt;font-weight:400;line-height:100%;position:relative;top:-2.8pt;vertical-align:baseline">(1)</span></div></td><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">17,317</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">(47,760)</span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 18pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Total losses incurred</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">319,016</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">94,884 </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr style="height:3pt"><td colspan="6" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #d0d0ce;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Losses paid:</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #d0d0ce;border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 6.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Losses and LAE paid in respect of delinquency notices received in:</span></td><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #d0d0ce;border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 18pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Current year</span></td><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">1,486</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">980 </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #d0d0ce;border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 18pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Prior years</span></td><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">93,937</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">165,844 </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #000000;border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 18pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Reinsurance terminations</span></td><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">(20)</span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">(13,980)</span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 18pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Total losses paid</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">95,403</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">152,844 </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #d0d0ce;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Net reserve at end of period</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">757,306</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">582,731 </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #000000;border-top:1pt solid #d0d0ce;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Plus reinsurance recoverables</span></td><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">83,143</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #d0d0ce;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #d0d0ce;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">19,566 </span></td><td style="border-top:1pt solid #d0d0ce;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="6" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">Reserve at end of period</span></td><td colspan="3" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:0 1pt"/><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">$</span></td><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:700;line-height:100%">840,449</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%"> </span></td><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:0 1pt"/><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">$</span></td><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:100%">602,297 </span></td><td style="border-bottom:1pt solid #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="margin-top:6pt;padding-left:18pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:5.2pt;font-weight:400;line-height:120%;position:relative;top:-2.8pt;vertical-align:baseline">(1)</span><span style="color:#000000;font-family:'Roboto',sans-serif;font-size:8pt;font-weight:400;line-height:120%;padding-left:11.52pt">A positive number for prior year loss development indicates a deficiency of prior year reserves. A negative number for prior year loss development indicates a redundancy of prior year loss reserves. See the following table for more information about prior year loss development.</span></div>
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	555334000	USD
CY2018Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	674019000	USD
CY2019Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	21641000	USD
CY2018Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	33328000	USD
CY2019Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	533693000	USD
CY2018Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	640691000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	301699000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	142644000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	17317000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-47760000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	319016000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	94884000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	1486000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	980000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	93937000	USD
	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	165844000	USD
	mtg	Reinsurance Terminations ReinsuranceTerminations	20000	USD
	mtg	Reinsurance Terminations ReinsuranceTerminations	13980000	USD
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	95403000	USD
	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	152844000	USD
CY2020Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	757306000	USD
CY2019Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	582731000	USD
CY2020Q3	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	83143000	USD
CY2019Q3	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	19566000	USD
CY2020Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	840449000	USD
CY2019Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	602297000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	17317000	USD
	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-47760000	USD
CY2020Q2	mtg	Primary Default Inventory PrimaryDefaultInventory	69326	loan
CY2019Q2	mtg	Primary Default Inventory PrimaryDefaultInventory	29795	loan
CY2019Q4	mtg	Primary Default Inventory PrimaryDefaultInventory	30028	loan
CY2018Q4	mtg	Primary Default Inventory PrimaryDefaultInventory	32898	loan
CY2020Q3	mtg	Primary Default Inventory New Notices PrimaryDefaultInventoryNewNotices	20924	loan
CY2019Q3	mtg	Primary Default Inventory New Notices PrimaryDefaultInventoryNewNotices	14019	loan
	mtg	Primary Default Inventory New Notices PrimaryDefaultInventoryNewNotices	90906	loan
	mtg	Primary Default Inventory New Notices PrimaryDefaultInventoryNewNotices	40545	loan
CY2020Q3	mtg	Primary Default Inventory Cures PrimaryDefaultInventoryCures	25446	loan
CY2019Q3	mtg	Primary Default Inventory Cures PrimaryDefaultInventoryCures	12592	loan
	mtg	Primary Default Inventory Cures PrimaryDefaultInventoryCures	54523	loan
	mtg	Primary Default Inventory Cures PrimaryDefaultInventoryCures	39822	loan
CY2020Q3	mtg	Primary Default Inventory Paids PrimaryDefaultInventoryPaids	375	loan
CY2019Q3	mtg	Primary Default Inventory Paids PrimaryDefaultInventoryPaids	1045	loan
	mtg	Primary Default Inventory Paids PrimaryDefaultInventoryPaids	1933	loan
	mtg	Primary Default Inventory Paids PrimaryDefaultInventoryPaids	3345	loan
CY2020Q3	mtg	Primary Default Inventory Rescissions And Denials PrimaryDefaultInventoryRescissionsAndDenials	11	loan
CY2019Q3	mtg	Primary Default Inventory Rescissions And Denials PrimaryDefaultInventoryRescissionsAndDenials	42	loan
	mtg	Primary Default Inventory Rescissions And Denials PrimaryDefaultInventoryRescissionsAndDenials	60	loan
	mtg	Primary Default Inventory Rescissions And Denials PrimaryDefaultInventoryRescissionsAndDenials	141	loan
CY2020Q3	mtg	Primary Default Inventory Other Items Removed PrimaryDefaultInventoryOtherItemsRemoved	0	loan
CY2019Q3	mtg	Primary Default Inventory Other Items Removed PrimaryDefaultInventoryOtherItemsRemoved	195	loan
	mtg	Primary Default Inventory Other Items Removed PrimaryDefaultInventoryOtherItemsRemoved	0	loan
	mtg	Primary Default Inventory Other Items Removed PrimaryDefaultInventoryOtherItemsRemoved	195	loan
CY2020Q3	mtg	Primary Default Inventory PrimaryDefaultInventory	64418	loan
CY2019Q3	mtg	Primary Default Inventory PrimaryDefaultInventory	29940	loan
CY2020Q3	mtg	Primary Default Inventory PrimaryDefaultInventory	64418	loan
CY2019Q3	mtg	Primary Default Inventory PrimaryDefaultInventory	29940	loan
CY2020Q3	mtg	Primary Default Inventory Percentof Default Inventory Subject To Covid19 Forbearance Plan PrimaryDefaultInventoryPercentofDefaultInventorySubjectToCovid19ForbearancePlan	0.67
CY2020Q3	mtg	Primary Default Inventory Three Months Or Less PrimaryDefaultInventoryThreeMonthsOrLess	15879	loan
CY2019Q4	mtg	Primary Default Inventory Three Months Or Less PrimaryDefaultInventoryThreeMonthsOrLess	9447	loan
CY2019Q3	mtg	Primary Default Inventory Three Months Or Less PrimaryDefaultInventoryThreeMonthsOrLess	9462	loan
CY2020Q3	mtg	Primary Default Inventory Four To Eleven Months PrimaryDefaultInventoryFourToElevenMonths	37702	loan
CY2019Q4	mtg	Primary Default Inventory Four To Eleven Months PrimaryDefaultInventoryFourToElevenMonths	9664	loan
CY2019Q3	mtg	Primary Default Inventory Four To Eleven Months PrimaryDefaultInventoryFourToElevenMonths	9082	loan
CY2020Q3	mtg	Primary Default Inventory Twelve Months Or More PrimaryDefaultInventoryTwelveMonthsOrMore	10837	loan
CY2019Q4	mtg	Primary Default Inventory Twelve Months Or More PrimaryDefaultInventoryTwelveMonthsOrMore	10917	loan
CY2019Q3	mtg	Primary Default Inventory Twelve Months Or More PrimaryDefaultInventoryTwelveMonthsOrMore	11396	loan
CY2020Q3	mtg	Primary Default Inventory PrimaryDefaultInventory	64418	loan
CY2019Q4	mtg	Primary Default Inventory PrimaryDefaultInventory	30028	loan
CY2019Q3	mtg	Primary Default Inventory PrimaryDefaultInventory	29940	loan
CY2020Q3	mtg	Primary Default Inventory Three Months Or Less Percentage PrimaryDefaultInventoryThreeMonthsOrLessPercentage	0.25
CY2019Q4	mtg	Primary Default Inventory Three Months Or Less Percentage PrimaryDefaultInventoryThreeMonthsOrLessPercentage	0.32
CY2019Q3	mtg	Primary Default Inventory Three Months Or Less Percentage PrimaryDefaultInventoryThreeMonthsOrLessPercentage	0.32
CY2020Q3	mtg	Primary Default Inventory Four To Eleven Months Percentage PrimaryDefaultInventoryFourToElevenMonthsPercentage	0.58
CY2019Q4	mtg	Primary Default Inventory Four To Eleven Months Percentage PrimaryDefaultInventoryFourToElevenMonthsPercentage	0.32
CY2020Q1	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	12.47
CY2019Q3	mtg	Primary Default Inventory Four To Eleven Months Percentage PrimaryDefaultInventoryFourToElevenMonthsPercentage	0.30
CY2020Q3	mtg	Primary Default Inventory Twelve Months Or More Percentage PrimaryDefaultInventoryTwelveMonthsOrMorePercentage	0.17
CY2019Q4	mtg	Primary Default Inventory Twelve Months Or More Percentage PrimaryDefaultInventoryTwelveMonthsOrMorePercentage	0.36
CY2019Q3	mtg	Primary Default Inventory Twelve Months Or More Percentage PrimaryDefaultInventoryTwelveMonthsOrMorePercentage	0.38
CY2020Q3	mtg	Primary Default Inventory Percentage PrimaryDefaultInventoryPercentage	1
CY2019Q4	mtg	Primary Default Inventory Percentage PrimaryDefaultInventoryPercentage	1
CY2019Q3	mtg	Primary Default Inventory Percentage PrimaryDefaultInventoryPercentage	1
CY2020Q3	mtg	Primary Default Inventory Claims Received Inventory PrimaryDefaultInventoryClaimsReceivedInventory	172	loan
CY2019Q4	mtg	Primary Default Inventory Claims Received Inventory PrimaryDefaultInventoryClaimsReceivedInventory	538	loan
CY2019Q3	mtg	Primary Default Inventory Claims Received Inventory PrimaryDefaultInventoryClaimsReceivedInventory	557	loan
CY2020Q3	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	0.32
CY2019Q4	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	0.36
CY2019Q3	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	0.36
CY2020Q3	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2020Q1	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	9600000	shares
CY2020Q3	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	291000000	USD
	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.06
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	62000000	USD
CY2020Q3	mtg	Number Of Jurisdictions With Risk To Capital Requirements NumberOfJurisdictionsWithRiskToCapitalRequirements	16	jurisdiction
	us-gaap	Description Of Regulatory Capital Requirements Under Insurance Regulations DescriptionOfRegulatoryCapitalRequirementsUnderInsuranceRegulations	25 to 1
	mtg	Risktocapitalratioofcombinedinsuranceoperationsatendofperiod Risktocapitalratioofcombinedinsuranceoperationsatendofperiod	9.4 to 1
CY2020Q3	mtg	Percentage Of Statutory Policyholders Surplus Used To Determine Maximum Allowable Dividends PercentageOfStatutoryPolicyholdersSurplusUsedToDetermineMaximumAllowableDividends	0.10
	us-gaap	Statutory Accounting Practices Statutory Net Income Amount StatutoryAccountingPracticesStatutoryNetIncomeAmount	31306000	USD
	us-gaap	Statutory Accounting Practices Statutory Net Income Amount StatutoryAccountingPracticesStatutoryNetIncomeAmount	231135000	USD
CY2020Q3	us-gaap	Statutory Accounting Practices Statutory Capital And Surplus Balance StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance	1313952000	USD
CY2019Q3	us-gaap	Statutory Accounting Practices Statutory Capital And Surplus Balance StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance	1633847000	USD
CY2020Q3	mtg	Contingency Reserve ContingencyReserve	3409950000	USD
CY2019Q3	mtg	Contingency Reserve ContingencyReserve	2876748000	USD

Files In Submission

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0000876437-20-000040.txt	Edgar Link	pending
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mtg-20200930.htm	Edgar Link	pending
mtg-20200930_cal.xml	Edgar Link	unprocessable
mtg-20200930_def.xml	Edgar Link	unprocessable
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mtg-20200930_g3.jpg	Edgar Link	pending
mtg-20200930_htm.xml	Edgar Link	completed
mtg-20200930_lab.xml	Edgar Link	unprocessable
mtg-20200930_pre.xml	Edgar Link	unprocessable
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2020 Q4 Form 10-Q Financial Statement

#000087643720000040 Filed on November 04, 2020

Income Statement

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$MTG MGIC INVESTMENT CORP Stock $mtg

2020 Q4 Form 10-Q Financial Statement

#000087643720000040 Filed on November 04, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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MGIC INVESTMENT CORP Stock $mtg