$RDN
RADIAN GROUP INC Stock $rdn

$rdn Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000089092621000019 Filed on February 26, 2021

Income Statement

Concept	2020 Q4	2020 Q3	2020 Q2
Revenue	$38.12M	$375.2M	$364.4M
YoY Change	-8.01%	-1.34%	-7.73%
Cost Of Revenue	$21.60M	$24.35M	$17.97M
YoY Change	-20.82%	-16.15%	-35.46%
Gross Profit	$16.52M	$350.9M	$346.5M
YoY Change	16.68%	-0.12%	-5.62%
Gross Profit Margin	43.33%	93.51%	95.07%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$7.395M	$10.17M	$6.015M
YoY Change	9.02%	435.05%	216.58%
% of Gross Profit	44.78%	2.9%	1.74%
Operating Expenses	$162.5M	$214.0M	$406.7M
YoY Change	-1.75%	31.58%	119.32%
Operating Profit	-$146.0M	$136.9M	-$60.20M
YoY Change	-3.48%	-27.45%	-133.13%
Interest Expense	-$21.20M	$21.09M	$16.70M
YoY Change	73.77%	56.3%	11.62%
% of Operating Profit		15.41%
Other Income/Expense, Net
YoY Change
Pretax Income	$179.2M	$161.2M	-$42.22M
YoY Change	-12.84%	-25.94%	-120.15%
Income Tax	$31.20M	$26.10M	-$12.27M
% Of Pretax Income	17.41%	16.19%
Net Earnings	$148.0M	$135.1M	-$29.95M
YoY Change	-8.17%	-22.1%	-117.96%
Net Earnings / Revenue	388.33%	36.0%	-8.22%
Basic Earnings Per Share		$0.70	-$0.15
Diluted Earnings Per Share	$0.76	$0.70	-$0.15
COMMON SHARES
Basic Shares Outstanding	191.6M shares	193.2M shares	193.3M shares
Diluted Shares Outstanding	194.7M shares	194.2M shares	193.3M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2020 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$87.92M	$82.02M	$68.39M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$121.3M	$145.2M	$110.7M
YoY Change	29.59%	0.76%	-9.34%
LONG-TERM ASSETS
Property, Plant & Equipment	$80.46M	$27.17M	$27.50M
YoY Change	-8.45%	-20.88%	-23.05%
Goodwill	$9.800M
YoY Change
Intangibles
YoY Change
Long-Term Investments	$6.788B	$6.585B	$6.431B
YoY Change	19.96%	18.99%	16.65%
Other Assets	$6.200M	$4.400M	$16.30M
YoY Change	77.14%	51.72%	36.97%
Total Long-Term Assets	$7.827B	$7.632B	$7.459B
YoY Change	16.56%	16.94%	15.28%
TOTAL ASSETS
Total Short-Term Assets	$121.3M	$145.2M	$110.7M
Total Long-Term Assets	$7.827B	$7.632B	$7.459B
Total Assets	$7.948B	$7.777B	$7.569B
YoY Change	16.74%	16.59%	14.82%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$53.40M	$55.30M	$54.80M
YoY Change	-10.25%	-15.96%	-19.88%
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	$53.40M	$55.30M	$54.80M
YoY Change	-10.25%	-15.96%	-19.88%
LONG-TERM LIABILITIES
Long-Term Debt	$1.582B	$1.546B	$1.579B
YoY Change	54.81%	55.97%	44.96%
Other Long-Term Liabilities	$238.5M	$241.4M	$210.1M
YoY Change	-32.76%	-17.5%	-12.46%
Total Long-Term Liabilities	$1.821B	$1.787B	$1.789B
YoY Change	32.25%	39.22%	34.59%
TOTAL LIABILITIES
Total Short-Term Liabilities	$53.40M	$55.30M	$54.80M
Total Long-Term Liabilities	$1.821B	$1.787B	$1.789B
Total Liabilities	$3.664B	$3.655B	$3.583B
YoY Change	32.76%	33.0%	27.57%
SHAREHOLDERS EQUITY
Retained Earnings	$2.685B	$2.561B	$2.450B
YoY Change	12.34%	14.89%	19.17%
Common Stock	$210.0K	$2.239B	$2.233B
YoY Change	-99.99%	-9.32%	-12.08%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$910.1M	$909.7M	$909.7M
YoY Change	0.94%	0.91%	0.92%
Treasury Stock Shares	18.52M shares	18.51M shares	18.51M shares
Shareholders Equity	$4.284B	$4.122B	$3.986B
YoY Change
Total Liabilities & Shareholders Equity	$7.948B	$7.777B	$7.569B
YoY Change	16.74%	16.59%	14.82%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2020 Q2
OPERATING ACTIVITIES
Net Income	$148.0M	$135.1M	-$29.95M
YoY Change	-8.17%	-22.1%	-117.96%
Depreciation, Depletion And Amortization	$7.395M	$10.17M	$6.015M
YoY Change	9.02%	435.05%	216.58%
Cash From Operating Activities	$159.6M	$193.5M	$149.5M
YoY Change	-14.93%	14.7%	24.27%
INVESTING ACTIVITIES
Capital Expenditures	-$2.300M	-$4.100M	-$5.600M
YoY Change	-66.67%	-25.45%	-34.12%
Acquisitions
YoY Change
Other Investing Activities	-$143.3M	-$153.1M	-$606.7M
YoY Change	8.4%	1115.08%	-1335.64%
Cash From Investing Activities	-$145.5M	-$157.3M	-$612.4M
YoY Change	4.6%	769.06%	-1612.1%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-6.500M	-34.40M	485.6M
YoY Change	47.73%	-80.62%	-331.79%
NET CHANGE
Cash From Operating Activities	159.6M	193.5M	149.5M
Cash From Investing Activities	-145.5M	-157.3M	-612.4M
Cash From Financing Activities	-6.500M	-34.40M	485.6M
Net Change In Cash	7.600M	1.800M	22.70M
YoY Change	-82.77%	-106.69%	-146.61%
FREE CASH FLOW
Cash From Operating Activities	$159.6M	$193.5M	$149.5M
Capital Expenditures	-$2.300M	-$4.100M	-$5.600M
Free Cash Flow	$161.9M	$197.6M	$155.1M
YoY Change	-16.76%	13.43%	20.42%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Registrant Name EntityRegistrantName	RADIAN GROUP INC
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000890926
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Local Phone Number LocalPhoneNumber	231-1000
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	191688864	shares
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020Q2	dei	Entity Public Float EntityPublicFloat	2958053939	USD
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	1-11356
CY2020	dei	Entity Registrant Name EntityRegistrantName	RADIAN GROUP INC
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	23-2691170
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	1500 Market Street
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Philadelphia
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	19102
CY2020	dei	City Area Code CityAreaCode	215
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $.001 par value per share
CY2020	dei	Trading Symbol TradingSymbol	RDN
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	2958053939	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	191688864	shares
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	-948000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5393623000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4549534000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5723340000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	4688911000	USD
CY2020Q4	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	260773000	USD
CY2019Q4	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	297505000	USD
CY2020Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	290885000	USD
CY2019Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	317150000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	145501000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	125311000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	151240000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	130221000	USD
CY2020Q4	rdn	Reinvested Cash Collateral Held Under Securities Lending Agreements ReinvestedCashCollateralHeldUnderSecuritiesLendingAgreements	15587000	USD
CY2019Q4	rdn	Reinvested Cash Collateral Held Under Securities Lending Agreements ReinvestedCashCollateralHeldUnderSecuritiesLendingAgreements	25561000	USD
CY2020Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	618004000	USD
CY2019Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	518393000	USD
CY2020Q4	us-gaap	Other Investments OtherInvestments	4973000	USD
CY2019Q4	us-gaap	Other Investments OtherInvestments	4072000	USD
CY2020Q4	us-gaap	Investments Investments	6788442000	USD
CY2019Q4	us-gaap	Investments Investments	5658747000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	87915000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	92729000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	6231000	USD
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CY2019Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	32333000	USD
CY2020Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	121294000	USD
CY2019Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	93630000	USD
CY2020Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	73202000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	16976000	USD
CY2020Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	18305000	USD
CY2019Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	20759000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	80457000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	87879000	USD
CY2020Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	267638000	USD
CY2019Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	363856000	USD
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	23043000	USD
CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	28187000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	447447000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	409672000	USD
CY2020Q4	us-gaap	Assets Assets	7948021000	USD
CY2019Q4	us-gaap	Assets Assets	6808313000	USD
CY2020Q4	us-gaap	Unearned Premiums UnearnedPremiums	448791000	USD
CY2019Q4	us-gaap	Unearned Premiums UnearnedPremiums	626822000	USD
CY2020Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	848413000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	404765000	USD
CY2020Q4	us-gaap	Senior Notes SeniorNotes	1405674000	USD
CY2019Q4	us-gaap	Senior Notes SeniorNotes	887110000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	176483000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Advances Branch Of Fhlb Bank Amount Of Advances By Branch FederalHomeLoanBankAdvancesBranchOfFHLBBankAmountOfAdvancesByBranch	134875000	USD
CY2020Q4	us-gaap	Funds Held Under Reinsurance Agreements Liability FundsHeldUnderReinsuranceAgreementsLiability	278555000	USD
CY2019Q4	us-gaap	Funds Held Under Reinsurance Agreements Liability FundsHeldUnderReinsuranceAgreementsLiability	291829000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	213897000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	71084000	USD
CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	291855000	USD
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	343105000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	3663668000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	2759590000	USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	210000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	219000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	910115000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	901657000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2245897000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2449884000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2684636000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2389789000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	263725000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	110488000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	4284353000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	4048723000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7948021000	USD
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CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	1014007000	USD
CY2020	rdn	Services Revenue Net ServicesRevenueNet	105385000	USD
CY2019	rdn	Services Revenue Net ServicesRevenueNet	154596000	USD
CY2018	rdn	Services Revenue Net ServicesRevenueNet	144972000	USD
CY2020	us-gaap	Net Investment Income NetInvestmentIncome	154037000	USD
CY2019	us-gaap	Net Investment Income NetInvestmentIncome	171796000	USD
CY2018	us-gaap	Net Investment Income NetInvestmentIncome	152475000	USD
CY2020	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	60277000	USD
CY2019	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	51719000	USD
CY2018	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	-42476000	USD
CY2020	us-gaap	Other Income OtherIncome	3597000	USD
CY2019	us-gaap	Other Income OtherIncome	3495000	USD
CY2018	us-gaap	Other Income OtherIncome	4028000	USD
CY2020	us-gaap	Revenues Revenues	1438617000	USD
CY2019	us-gaap	Revenues Revenues	1526955000	USD
CY2018	us-gaap	Revenues Revenues	1273006000	USD
CY2020	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	485117000	USD
CY2019	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	132031000	USD
CY2018	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	104641000	USD
CY2020	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	30989000	USD
CY2019	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	25314000	USD
CY2018	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	25265000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	108324000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	86066000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	98124000	USD
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	280710000	USD
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	306129000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	280818000	USD
CY2020	us-gaap	Other Restructuring Costs OtherRestructuringCosts	0	USD
CY2019	us-gaap	Other Restructuring Costs OtherRestructuringCosts	0	USD
CY2018	us-gaap	Other Restructuring Costs OtherRestructuringCosts	6053000	USD
CY2020	us-gaap	Interest Expense InterestExpense	71150000	USD
CY2019	us-gaap	Interest Expense InterestExpense	56310000	USD
CY2018	us-gaap	Interest Expense InterestExpense	61490000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22738000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	4828000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	5144000	USD
CY2019	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	22288000	USD
CY2018	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	12429000	USD
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	959176000	USD
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	677962000	USD
CY2018	us-gaap	Costs And Expenses CostsAndExpenses	588820000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	479441000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	848993000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	684186000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	85815000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	176684000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78175000	USD
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	393626000	USD
CY2019	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	672309000	USD
CY2018	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	606011000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.01
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.22
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.83
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.00
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.20
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.77
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	195443000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	208773000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	214267000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	196642000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	210340000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	218553000	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	393626000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	672309000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	606011000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	178761000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	180441000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-97356000	USD
CY2020	rdn	Other Comprehensive Income Loss Reclassification Adjustment For Non Credit Related Impairments Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNonCreditRelatedImpairmentsNetOfTax	26440000	USD
CY2019	rdn	Other Comprehensive Income Loss Reclassification Adjustment For Non Credit Related Impairments Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNonCreditRelatedImpairmentsNetOfTax	8897000	USD
CY2018	rdn	Other Comprehensive Income Loss Reclassification Adjustment For Non Credit Related Impairments Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNonCreditRelatedImpairmentsNetOfTax	-10270000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-991000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	153312000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	171544000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-87086000	USD
CY2020	rdn	Other Adjustments To Other Comprehensive Income Net Of Tax OtherAdjustmentsToOtherComprehensiveIncomeNetOfTax	-75000	USD
CY2019	rdn	Other Adjustments To Other Comprehensive Income Net Of Tax OtherAdjustmentsToOtherComprehensiveIncomeNetOfTax	-136000	USD
CY2018	rdn	Other Adjustments To Other Comprehensive Income Net Of Tax OtherAdjustmentsToOtherComprehensiveIncomeNetOfTax	133000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	153237000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	171408000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-86953000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	546863000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	843717000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	519058000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	393626000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	672309000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	606011000	USD
CY2020	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	60277000	USD
CY2019	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	51719000	USD
CY2018	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	-42476000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22738000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	102079000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	157162000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	120573000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	4828000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	rdn	Increase Decreasein Goodwilland Intangible Assetsincluding Restructuring IncreaseDecreaseinGoodwillandIntangibleAssetsincludingRestructuring	5144000	USD
CY2019	rdn	Increase Decreasein Goodwilland Intangible Assetsincluding Restructuring IncreaseDecreaseinGoodwillandIntangibleAssetsincludingRestructuring	22288000	USD
CY2018	rdn	Increase Decreasein Goodwilland Intangible Assetsincluding Restructuring IncreaseDecreaseinGoodwillandIntangibleAssetsincludingRestructuring	12429000	USD
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	66585000	USD
CY2019	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	50439000	USD
CY2018	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	56661000	USD
CY2020	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	1714000	USD
CY2019	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-2545000	USD
CY2018	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	3485000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	29280000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	25504000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	4599000	USD
CY2020	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	56226000	USD
CY2019	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	2574000	USD
CY2018	us-gaap	Increase Decrease In Reinsurance Recoverable IncreaseDecreaseInReinsuranceRecoverable	2497000	USD
CY2020	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-2454000	USD
CY2019	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	3448000	USD
CY2018	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	324000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	-96218000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	-53772000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Reinsurance Premiums IncreaseDecreaseInPrepaidReinsurancePremiums	31119000	USD
CY2020	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-178031000	USD
CY2019	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-112535000	USD
CY2018	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	15419000	USD
CY2020	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	443648000	USD
CY2019	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	3404000	USD
CY2018	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	-109642000	USD
CY2020	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	13274000	USD
CY2019	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	29383000	USD
CY2018	us-gaap	Increase Decrease In Funds Held Under Reinsurance Agreements IncreaseDecreaseInFundsHeldUnderReinsuranceAgreements	-32814000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	57538000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	130953000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-49868000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-54980000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	61062000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-106799000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	658434000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	694431000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	677786000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	963589000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	986647000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	728584000	USD
CY2020	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	11602000	USD
CY2019	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	130537000	USD
CY2018	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	58317000	USD
CY2020	rdn	Proceedsfrom Saleof Equity Securities ProceedsfromSaleofEquitySecurities	90450000	USD
CY2019	rdn	Proceedsfrom Saleof Equity Securities ProceedsfromSaleofEquitySecurities	69779000	USD
CY2018	rdn	Proceedsfrom Saleof Equity Securities ProceedsfromSaleofEquitySecurities	95697000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	645068000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	464777000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	457595000	USD
CY2020	us-gaap	Proceeds From Maturities Repayments And Calls Of Trading Securities Heldforinvestment ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment	22913000	USD
CY2019	us-gaap	Proceeds From Maturities Repayments And Calls Of Trading Securities Heldforinvestment ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment	37684000	USD
CY2018	us-gaap	Proceeds From Maturities Repayments And Calls Of Trading Securities Heldforinvestment ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment	54329000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	2449762000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1913703000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1875069000	USD
CY2020	rdn	Paymentsto Acquire Equity Securities PaymentstoAcquireEquitySecurities	85014000	USD
CY2019	rdn	Paymentsto Acquire Equity Securities PaymentstoAcquireEquitySecurities	57422000	USD
CY2018	rdn	Paymentsto Acquire Equity Securities PaymentstoAcquireEquitySecurities	69160000	USD
CY2020	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	82925000	USD
CY2019	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-8017000	USD
CY2018	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	108325000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1434000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	739000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-2590000	USD
CY2020	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	16481000	USD
CY2019	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	0	USD
CY2018	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	0	USD
CY2020	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	17016000	USD
CY2019	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	27626000	USD
CY2018	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	26008000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	7964000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-883180000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-302049000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-689414000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	97458000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	2061000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	2140000	USD
CY2020	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	515567000	USD
CY2019	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	442439000	USD
CY2018	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	0	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	610763000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1553000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2416000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1385000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	226305000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	300201000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	50053000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-2292000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-989000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1510000	USD
CY2020	us-gaap	Increase Decrease In Securities Lending Payable IncreaseDecreaseInSecuritiesLendingPayable	-37475000	USD
CY2019	us-gaap	Increase Decrease In Securities Lending Payable IncreaseDecreaseInSecuritiesLendingPayable	13862000	USD
CY2018	us-gaap	Increase Decrease In Securities Lending Payable IncreaseDecreaseInSecuritiesLendingPayable	39342000	USD
CY2020	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	207034000	USD
CY2019	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	115275000	USD
CY2018	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	56449000	USD
CY2020	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	137927000	USD
CY2019	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	62932000	USD
CY2018	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	20917000	USD
CY2020	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	79000	USD
CY2019	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	152000	USD
CY2018	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	170000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	222618000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-403106000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	22386000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	0	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-4000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	0	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-2128000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-10728000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	10758000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	96274000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	107002000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	96244000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	94146000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	96274000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	107002000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	81404000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	71469000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	8364000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	60564000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	45762000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	56688000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:7pt;margin-top:9pt"><span style="color:#002b49;font-family:'Arial',sans-serif;font-size:13pt;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of our contingent assets and liabilities at the dates of the financial statements, as well as the reported amounts of revenues and expenses during the reporting periods. While the amounts included in our consolidated financial statements include our best estimates and assumptions, actual results may vary materially.</span></div>
CY2020Q4	rdn	Number Of Investment Categories NumberOfInvestmentCategories	3	group
CY2020	rdn	Maximum Maturity Duration For Short Term Investment Grouping MaximumMaturityDurationForShortTermInvestmentGrouping	P12M
CY2020Q4	rdn	Second Lien Reservefor Premium Deficiency SecondLienReserveforPremiumDeficiency	100000	USD
CY2019Q4	rdn	Second Lien Reservefor Premium Deficiency SecondLienReserveforPremiumDeficiency	200000	USD
CY2020Q4	rdn	Percentof Lt Vatwhich Hpa Must Be Canceled Automatically PercentofLTVatwhichHPAMustBeCanceledAutomatically	0.78
CY2020	us-gaap	Revenue Recognition Sales Of Services RevenueRecognitionSalesOfServices	<div style="margin-bottom:6pt;margin-top:8pt"><span style="color:#4d6b80;font-family:'Arial',sans-serif;font-size:11pt;font-weight:700;line-height:120%">Title Insurance and Related Services </span></div><div style="margin-bottom:5pt;margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Title insurance premiums are recognized as revenue upon closing and completion of the real estate transaction. Premiums generally are calculated with reference to the policy amount. Premiums are charged to customers based on rates predetermined in coordination with each state's respective Department of Insurance. Such regulations vary from state to state. Premium revenues from agency title operations are primarily comprised of premiums recognized upon title order and completion of real estate transaction closing.</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Other title-related fees and income are closely related to title insurance premiums and are primarily associated with managing the closing of real estate transactions. As such, revenue is primarily recognized upon closing of the real estate transaction or completion and billing of services. We offer title services that include tax and title data services; centralized recording services; document retrieval; default curative title services; deed reports; property reports, and other real estate or title-related activities. Expenses typically associated with premiums include third-party agent commissions and premium taxes.</span></div><div style="margin-bottom:6pt;margin-top:8pt"><span style="color:#4d6b80;font-family:'Arial',sans-serif;font-size:11pt;font-weight:700;line-height:120%">Other Services</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">We recognize revenue representing the transfer of services to customers in an amount that reflects the consideration that we expect to be entitled to receive in exchange for those services, recognized as the performance obligations are satisfied. Due to the transactional nature of our business, our services revenue may fluctuate from period to period as transactions are commenced or completed.</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Prior to our January 2020 sale of Clayton, our services included transaction management services related to loan acquisition, RMBS securitization and distressed asset reviews and servicer and loan surveillance services. Also, through December 2020, we offered residential real estate appraisal services through a panel of independent contractor appraisers; however, consistent with increased market demand for technology-driven solutions, in October 2020 we announced the wind down of this traditional appraisal business, in order to focus on our digital valuation services that are expected to produce higher growth. Our remaining services and related revenue recognition considerations are as follows:</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:700;line-height:120%">Valuation Services. </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">We leverage technology and a quality control process to deliver real estate valuation products and services to our customers, which include: appraisal review products; hybrid/ancillary appraisal products; automated valuation products; interactive valuation products; and broker price opinions (BPOs). Each service qualifies as a separate performance obligation for which revenue is recognized as the service is performed and made available to the client.</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-style:italic;font-weight:700;line-height:120%">Asset Management Services.</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%"> We provide asset management services, which include management of the entire REO disposition process, services such as diligence and underwriting that serve the single family rental asset class, and a web-based workflow solution for task driven asset management, including the management of REO assets, rental properties, due diligence for bulk acquisitions, loss mitigation efforts and short sales. Revenue attributable to REO services provided is based on a percentage of the sale and recognized over time, measured based on the progress to date and typically coincides with the client’s successful closing on the property. In certain instances, fees are received at the time that an asset is assigned to Radian </span></div>for management. These fees are recorded as deferred revenue and are recognized over time based on progress to date and the availability to customers.Mortgage Services. We provide third-party contract underwriting services to our mortgage insurance customers. Generally, revenue is recognized when contract underwriting results are made available to the customer.
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	18300000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	20800000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	19400000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	234486000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	154029000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	80457000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	229813000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	141934000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	87879000	USD
CY2020	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="margin-bottom:6pt;margin-top:8pt"><span style="color:#4d6b80;font-family:'Arial',sans-serif;font-size:11pt;font-weight:700;line-height:120%">Accounting Standards Not Yet Adopted</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">In August 2018, the FASB issued ASU 2018-12, Financial Services—Insurance. The new standard: (i) requires that assumptions used to measure the liability for future policy benefits be reviewed at least annually; (ii) defines and simplifies the measurement of market risk benefits; (iii) simplifies the amortization of deferred acquisition costs; and (iv) enhances the required disclosures about long-duration contracts. This update is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact on our financial statements and future disclosures as a result of this update.</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">In December 2019, the FASB issued ASU 2019-12, Income Taxes—Simplifying the Accounting for Income Taxes. This update simplifies the accounting for income taxes by removing certain exceptions to the general principles of ASC Topic 740 in GAAP. This update is effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. Early adoption is permitted. The adoption of this ASU is not expected to have a material effect on the Company's consolidated financial statements.</span></div><div style="text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:115%">In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform—Facilitation of the Effects of Reference Reform on Financial Reporting. This update provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform. In January 2021, the FASB issued ASU 2021-01 Reference Rate Reform - Scope, to clarify that certain optional expedients and exceptions apply to derivatives that are affected by the discounting transition. The amendments in these updates are optional and may be elected from the date of issuance through December 31, 2022, as reference rate reform activities occur. We are currently evaluating the impact of the guidance and our options related to the practical expedients.</span></div><div style="margin-bottom:5pt;margin-top:5pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">In October 2020, the FASB issued ASU 2020-08, Codification Improvements to Subtopic 310-20, Receivables—Nonrefundable Fees and Other Costs. This update clarifies that an entity should reevaluate whether a callable debt security is within the scope of ASC paragraph 310-20-35-33 for each reporting period. This update is effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. Early adoption is not permitted. Entities are required to apply ASU 2020-08 on a prospective basis as of the beginning of the period of adoption for existing or newly purchased </span></div>callable debt securities.
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	393626000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	393626000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	672309000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	672309000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	606011000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	606011000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	195443000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	208773000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	214267000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1199000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1567000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4286000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	196642000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	210340000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	218553000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.01
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.22
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.83
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.00
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.20
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.77
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
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CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22738000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	4828000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	5144000	USD
CY2019	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	22288000	USD
CY2018	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	12429000	USD
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	7759000	USD
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	7507000	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	6404000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	479441000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	848993000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	684186000	USD
CY2020	us-gaap	Premiums Earned Net PremiumsEarnedNet	1115321000	USD
CY2020	rdn	Services Revenue Net ServicesRevenueNet	105385000	USD
CY2020	us-gaap	Net Investment Income NetInvestmentIncome	154037000	USD
CY2020	us-gaap	Other Income OtherIncome	3597000	USD
CY2020	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	60277000	USD
CY2020	us-gaap	Revenues Revenues	1438617000	USD
CY2019	us-gaap	Premiums Earned Net PremiumsEarnedNet	1145349000	USD
CY2019	rdn	Services Revenue Net ServicesRevenueNet	154596000	USD
CY2019	us-gaap	Net Investment Income NetInvestmentIncome	171796000	USD
CY2019	us-gaap	Other Income OtherIncome	3495000	USD
CY2019	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	51719000	USD
CY2019	us-gaap	Revenues Revenues	1526955000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	1014007000	USD
CY2018	rdn	Services Revenue Net ServicesRevenueNet	144972000	USD
CY2018	us-gaap	Net Investment Income NetInvestmentIncome	152475000	USD
CY2018	us-gaap	Other Income OtherIncome	4028000	USD
CY2018	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	-42476000	USD
CY2018	us-gaap	Revenues Revenues	1273006000	USD
CY2020	rdn	Services Revenue Net ServicesRevenueNet	105385000	USD
CY2019	rdn	Services Revenue Net ServicesRevenueNet	154596000	USD
CY2018	rdn	Services Revenue Net ServicesRevenueNet	144972000	USD
CY2020Q4	us-gaap	Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear	194	security
CY2020Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	679631000	USD
CY2020Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	12101000	USD
CY2020Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	36	security
CY2020Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	158852000	USD
CY2020Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2056000	USD
CY2020Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	230	security
CY2020Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	838483000	USD
CY2020Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	14157000	USD
CY2019Q4	us-gaap	Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear	154	security
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	660883000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	4183000	USD
CY2019Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	70	security
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	254728000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	4145000	USD
CY2019Q4	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	224	security
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	915611000	USD
CY2019Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	8328000	USD
CY2020	rdn	Securities Lending Rateof Collateral Required SecuritiesLendingRateofCollateralRequired	1.02
CY2020	us-gaap	Gross Investment Income Operating GrossInvestmentIncomeOperating	160633000	USD
CY2019	us-gaap	Gross Investment Income Operating GrossInvestmentIncomeOperating	179932000	USD
CY2018	us-gaap	Gross Investment Income Operating GrossInvestmentIncomeOperating	159955000	USD
CY2020	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	6596000	USD
CY2019	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	8136000	USD
CY2018	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	7480000	USD
CY2020	us-gaap	Investment Income Net InvestmentIncomeNet	154037000	USD
CY2019	us-gaap	Investment Income Net InvestmentIncomeNet	171796000	USD
CY2018	us-gaap	Investment Income Net InvestmentIncomeNet	152475000	USD
CY2020	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	34869000	USD
CY2019	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	11262000	USD
CY2018	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	-11256000	USD
CY2020	us-gaap	Trading Securities Realized Gain Loss TradingSecuritiesRealizedGainLoss	4000	USD
CY2019	us-gaap	Trading Securities Realized Gain Loss TradingSecuritiesRealizedGainLoss	-303000	USD
CY2018	us-gaap	Trading Securities Realized Gain Loss TradingSecuritiesRealizedGainLoss	-1840000	USD
CY2020	rdn	Equity Securities Realized Gain Loss EquitySecuritiesRealizedGainLoss	353000	USD
CY2019	rdn	Equity Securities Realized Gain Loss EquitySecuritiesRealizedGainLoss	-719000	USD
CY2018	rdn	Equity Securities Realized Gain Loss EquitySecuritiesRealizedGainLoss	532000	USD
CY2020	rdn	Realized Gains Losseson Investments Net RealizedGainsLossesonInvestmentsNet	35826000	USD
CY2019	rdn	Realized Gains Losseson Investments Net RealizedGainsLossesonInvestmentsNet	10843000	USD
CY2018	rdn	Realized Gains Losseson Investments Net RealizedGainsLossesonInvestmentsNet	-12094000	USD
CY2020	us-gaap	Impairment Of Investments ImpairmentOfInvestments	1401000	USD
CY2019	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2018	us-gaap	Impairment Of Investments ImpairmentOfInvestments	1744000	USD
CY2020	rdn	Other Than Temporary Impairment Losses Investments Expected Credit Losses OtherThanTemporaryImpairmentLossesInvestmentsExpectedCreditLosses	1254000	USD
CY2019	rdn	Other Than Temporary Impairment Losses Investments Expected Credit Losses OtherThanTemporaryImpairmentLossesInvestmentsExpectedCreditLosses	0	USD
CY2018	rdn	Other Than Temporary Impairment Losses Investments Expected Credit Losses OtherThanTemporaryImpairmentLossesInvestmentsExpectedCreditLosses	0	USD
CY2020	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	10960000	USD
CY2019	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	33220000	USD
CY2018	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	-27287000	USD
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	44131000	USD
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	44063000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	-41125000	USD
CY2020	rdn	Changein Unrealized Holding Gain Loss ChangeinUnrealizedHoldingGainLoss	12590000	USD
CY2019	rdn	Changein Unrealized Holding Gain Loss ChangeinUnrealizedHoldingGainLoss	28078000	USD
CY2018	rdn	Changein Unrealized Holding Gain Loss ChangeinUnrealizedHoldingGainLoss	-24720000	USD
CY2020	us-gaap	Goodwill Written Off Related To Sale Of Business Unit GoodwillWrittenOffRelatedToSaleOfBusinessUnit	191297000	USD
CY2020	rdn	Accumulated Amortization Goodwill Dispositions AccumulatedAmortizationGoodwillDispositions	191297000	USD
CY2020	rdn	Goodwill Dispositions Net GoodwillDispositionsNet	0	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5100000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8600000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	12400000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	3450000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	3397000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	3361000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	3033000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	0	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	13241000	USD
CY2020	us-gaap	Direct Premiums Written DirectPremiumsWritten	1108513000	USD
CY2019	us-gaap	Direct Premiums Written DirectPremiumsWritten	1132338000	USD
CY2018	us-gaap	Direct Premiums Written DirectPremiumsWritten	1089720000	USD
CY2020	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	12197000	USD
CY2019	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	10379000	USD
CY2018	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	6901000	USD
CY2020	us-gaap	Ceded Premiums Written CededPremiumsWritten	87201000	USD
CY2019	us-gaap	Ceded Premiums Written CededPremiumsWritten	56132000	USD
CY2018	us-gaap	Ceded Premiums Written CededPremiumsWritten	98314000	USD
CY2020	us-gaap	Premiums Written Net PremiumsWrittenNet	1033509000	USD
CY2019	us-gaap	Premiums Written Net PremiumsWrittenNet	1086585000	USD
CY2018	us-gaap	Premiums Written Net PremiumsWrittenNet	998307000	USD
CY2020	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1286527000	USD
CY2019	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1244870000	USD
CY2018	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1074298000	USD
CY2020	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	12213000	USD
CY2019	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	10382000	USD
CY2018	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	6904000	USD
CY2020	us-gaap	Ceded Premiums Earned CededPremiumsEarned	183419000	USD
CY2019	us-gaap	Ceded Premiums Earned CededPremiumsEarned	109903000	USD
CY2018	us-gaap	Ceded Premiums Earned CededPremiumsEarned	67195000	USD
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CY2019	us-gaap	Premiums Earned Net PremiumsEarnedNet	1145349000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	1014007000	USD
CY2020	rdn	Ceding Commissions Earned CedingCommissionsEarned	53654000	USD
CY2019	rdn	Ceding Commissions Earned CedingCommissionsEarned	48659000	USD
CY2018	rdn	Ceding Commissions Earned CedingCommissionsEarned	33446000	USD
CY2020	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	58266000	USD
CY2019	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	5859000	USD
CY2018	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	5086000	USD
CY2020Q4	rdn	Unearned Ceding Commissions UnearnedCedingCommissions	52500000	USD
CY2019Q4	rdn	Unearned Ceding Commissions UnearnedCedingCommissions	74800000	USD
CY2020Q4	rdn	Funds Held Under Reinsurance Agreements Off Balance Sheet Asset FundsHeldUnderReinsuranceAgreementsOffBalanceSheetAsset	228600000	USD
CY2019Q4	rdn	Funds Held Under Reinsurance Agreements Off Balance Sheet Asset FundsHeldUnderReinsuranceAgreementsOffBalanceSheetAsset	203200000	USD
CY2020Q4	us-gaap	Prepaid Taxes PrepaidTaxes	210889000	USD
CY2019Q4	us-gaap	Prepaid Taxes PrepaidTaxes	134800000	USD
CY2020Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	115586000	USD
CY2019Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	105721000	USD
CY2020Q4	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	57499000	USD
CY2019Q4	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	66442000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	32985000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	37866000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1202000	USD
CY2020Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group Other AssetsHeldForSaleNotPartOfDisposalGroupOther	0	USD
CY2019Q4	us-gaap	Assets Held For Sale Not Part Of Disposal Group Other AssetsHeldForSaleNotPartOfDisposalGroupOther	24908000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	30488000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	39935000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	447447000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	409672000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-16264000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	19522000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-42398000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	102079000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	157162000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	120573000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	85815000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	176684000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78175000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	100683000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	178289000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	143679000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	11290000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1941000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1856000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-14784000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-293000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	2589000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-9062000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5570000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-2312000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-4455000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1778000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	0	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	0	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	-73585000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	85815000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	176684000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78175000	USD
CY2020Q4	rdn	Deferred Tax Assets Operating Loss Carryforwards Stateand Local Netof Federal Benefit DeferredTaxAssetsOperatingLossCarryforwardsStateandLocalNetofFederalBenefit	75499000	USD
CY2019Q4	rdn	Deferred Tax Assets Operating Loss Carryforwards Stateand Local Netof Federal Benefit DeferredTaxAssetsOperatingLossCarryforwardsStateandLocalNetofFederalBenefit	65917000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	32673000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	36282000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	27703000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Premiums Reserve DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedPremiumsReserve	34394000	USD
CY2020Q4	rdn	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	11214000	USD
CY2019Q4	rdn	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	13293000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	11140000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	11642000	USD
CY2020Q4	rdn	Deferred Tax Assets Share Based Compensation DeferredTaxAssetsShareBasedCompensation	9291000	USD
CY2019Q4	rdn	Deferred Tax Assets Share Based Compensation DeferredTaxAssetsShareBasedCompensation	11238000	USD
CY2020Q4	rdn	Deferred Tax Assets Deferred Policy Acquisitionand Ceding Commission Costs DeferredTaxAssetsDeferredPolicyAcquisitionandCedingCommissionCosts	7043000	USD
CY2019Q4	rdn	Deferred Tax Assets Deferred Policy Acquisitionand Ceding Commission Costs DeferredTaxAssetsDeferredPolicyAcquisitionandCedingCommissionCosts	11190000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	4578000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	1920000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	8732000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	11188000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	187873000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	197064000	USD
CY2020Q4	rdn	Deferred Tax Liabilities Contingency Reserve DeferredTaxLiabilitiesContingencyReserve	216122000	USD
CY2019Q4	rdn	Deferred Tax Liabilities Contingency Reserve DeferredTaxLiabilitiesContingencyReserve	137983000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other Comprehensive Income DeferredTaxLiabilitiesOtherComprehensiveIncome	70057000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other Comprehensive Income DeferredTaxLiabilitiesOtherComprehensiveIncome	29303000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	13029000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	12803000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	9087000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	5708000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	15747000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	15914000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	324042000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	201711000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	77728000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	66437000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	213897000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	71084000	USD
CY2020Q4	rdn	Income Taxes Payable Federal Current IncomeTaxesPayableFederalCurrent	17500000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	74900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	77700000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	66400000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3100000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	300000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	1300000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	61600000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	37208000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	33552000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	250000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3215000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	1788000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	16568000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	441000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	171000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	31818000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	20249000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	37208000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-17000000.0	USD
CY2020Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	848413000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	404765000	USD
CY2020	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	the following table presents information relating to our mortgage insurance reserve for losses, including our IBNR reserve and LAE, but excluding our second-lien mortgage loan PDR.<div style="margin-bottom:5pt;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:55.040%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.823%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.496%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.823%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.496%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:0.823%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.499%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="padding:0 1pt"/><td colspan="15" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:120%">Year Ended December 31,</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#8b8886;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:120%">(In thousands)</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="background-color:#e6f8f8;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#00bab3;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:120%">2020</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="background-color:#f4f4f4;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#00bab3;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:120%">2019</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="3" style="background-color:#f4f4f4;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#00bab3;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:120%">2018</span></td></tr><tr><td colspan="3" style="border-top:1pt solid #c7c9c7;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Balance at January 1,</span></td><td colspan="3" style="border-top:1pt solid #c7c9c7;padding:0 1pt"/><td style="border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">$</span></td><td style="border-top:1pt solid #c7c9c7;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">401,273 </span></td><td style="border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #c7c9c7;padding:0 1pt"/><td style="border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">$</span></td><td style="border-top:1pt solid #c7c9c7;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">397,891 </span></td><td style="border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #c7c9c7;padding:0 1pt"/><td style="border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">$</span></td><td style="border-top:1pt solid #c7c9c7;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">507,588 </span></td><td style="border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="border-top:1pt solid #e9e9e9;padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Less: Reinsurance recoverables </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:5.85pt;font-weight:400;line-height:120%;position:relative;top:-3.15pt;vertical-align:baseline">(1) </span></div></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">14,594 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">11,009 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">8,350 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Balance at January 1, net of reinsurance recoverables</span></td><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">386,679 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">386,882 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">499,238 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="border-top:1pt solid #ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Add: Losses and LAE incurred in respect of default notices reported and unreported in:</span></td><td colspan="3" style="border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #c7c9c7;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #c7c9c7;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #c7c9c7;padding:0 1pt"/></tr><tr><td colspan="3" style="border-top:1pt solid #e9e9e9;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:12pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Current year </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:5.85pt;font-weight:400;line-height:120%;position:relative;top:-3.15pt;vertical-align:baseline">(2)</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%"> </span></div></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">517,807 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">146,733 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">135,291 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Prior years</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">(34,547)</span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">(14,709)</span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">(31,699)</span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Total incurred</span></td><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">483,260 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">132,024 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">103,592 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="border-top:1pt solid #ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Deduct: Paid claims and LAE related to:</span></td><td colspan="3" style="border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #c7c9c7;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #c7c9c7;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #c7c9c7;padding:0 1pt"/></tr><tr><td colspan="3" style="border-top:1pt solid #e9e9e9;padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:12pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Current year </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:5.85pt;font-weight:400;line-height:120%;position:relative;top:-3.15pt;vertical-align:baseline">(2) </span></div></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">4,148 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">4,220 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">5,856 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Prior years</span></td><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">93,453 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">128,007 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #e9e9e9;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">210,092 </span></td><td style="border-top:1pt solid #e9e9e9;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:2px 1pt 2px 13pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Total paid</span></td><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">97,601 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">132,227 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">215,948 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Balance at end of period, net of reinsurance recoverables</span></td><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">772,338 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">386,679 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#f4f4f4;border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">386,882 </span></td><td style="background-color:#f4f4f4;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="border-top:1pt solid #ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Add: reinsurance recoverables</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:5.85pt;font-weight:400;line-height:120%;position:relative;top:-3.15pt;vertical-align:baseline"> (1) </span></div></td><td colspan="3" style="border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">71,769 </span></td><td style="border-top:1pt solid #ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">14,594 </span></td><td style="border-top:1pt solid #ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-top:1pt solid #ffffff;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">11,009 </span></td><td style="border-top:1pt solid #ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="background-color:#f4f4f4;border-bottom:1pt solid #ffffff;border-top:1pt solid #ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">Balance at December 31,</span></td><td colspan="3" style="background-color:#f4f4f4;border-bottom:1pt solid #ffffff;border-top:1pt solid #ffffff;padding:0 1pt"/><td style="background-color:#f4f4f4;border-bottom:3pt double #c7c9c7;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#f4f4f4;border-bottom:3pt double #c7c9c7;border-top:1pt solid #c7c9c7;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">844,107 </span></td><td style="background-color:#f4f4f4;border-bottom:3pt double #c7c9c7;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#f4f4f4;border-bottom:1pt solid #ffffff;border-top:1pt solid #ffffff;padding:0 1pt"/><td style="background-color:#f4f4f4;border-bottom:3pt double #c7c9c7;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#f4f4f4;border-bottom:3pt double #c7c9c7;border-top:1pt solid #c7c9c7;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">401,273 </span></td><td style="background-color:#f4f4f4;border-bottom:3pt double #c7c9c7;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="background-color:#f4f4f4;border-bottom:1pt solid #ffffff;border-top:1pt solid #ffffff;padding:0 1pt"/><td style="background-color:#f4f4f4;border-bottom:3pt double #c7c9c7;border-top:1pt solid #c7c9c7;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">$</span></td><td style="background-color:#f4f4f4;border-bottom:3pt double #c7c9c7;border-top:1pt solid #c7c9c7;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">397,891 </span></td><td style="background-color:#f4f4f4;border-bottom:3pt double #c7c9c7;border-top:1pt solid #c7c9c7;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div style="padding-left:18pt;text-indent:-18pt"><span style="color:#64615d;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:120%">(1)</span><span style="color:#64615d;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:120%;padding-left:8.24pt">Related to ceded losses recoverable on reinsurance transactions. See Note 8 for additional information.</span></div>(2)Related to underlying defaulted loans with a most recent default notice dated in the year indicated. For example, if a loan had defaulted in a prior year, but then subsequently cured and later re-defaulted in the current year, that default would be considered a current year default.
CY2020Q4	rdn	Number Of Payments Missed For Insured Loans NumberOfPaymentsMissedForInsuredLoans	2	payment
CY2020Q4	rdn	Number Of States That Accounted For More Than10 Of Mortgage Insurance Business Measured By Primary Risk In Force NumberOfStatesThatAccountedForMoreThan10OfMortgageInsuranceBusinessMeasuredByPrimaryRiskInForce	0	state
CY2020Q4	rdn	Number Of Payments Missed For Insured Loans NumberOfPaymentsMissedForInsuredLoans	2	payment
CY2020Q4	rdn	Minimum Number Of Pending Or Threatened Matters That Could Effect Our Results MinimumNumberOfPendingOrThreatenedMattersThatCouldEffectOurResults	1	matter
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	8798000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	9332000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	13000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	140000	USD
CY2020	us-gaap	Lease Cost LeaseCost	8811000	USD
CY2019	us-gaap	Lease Cost LeaseCost	9472000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	9595000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	10615000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	32985000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	37866000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y3M18D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y2M12D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0672
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0680
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	8330000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	10040000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	10170000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	9904000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	7976000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	39870000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	86290000	USD
CY2020Q4	rdn	Lessee Operating Lease Imputed Interest LesseeOperatingLeaseImputedInterest	32891000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	9700000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	0	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	0	USD
CY2019Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2018Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2018Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2018Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2018Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2018Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2018Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2018Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2018Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2020Q1	rdn	Common Stock Dividends Announced CommonStockDividendsAnnounced	0.125
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.125
CY2020Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.125
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.125
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CY2020Q4	us-gaap	Prepaid Taxes PrepaidTaxes	210900000	USD
CY2020Q4	us-gaap	Prepaid Taxes PrepaidTaxes	210900000	USD
CY2020	rdn	Payments Made On Surplus Note PaymentsMadeOnSurplusNote	0	payment
CY2020Q4	rdn	Risk To Capital Ratio Regulatory Maximum RiskToCapitalRatioRegulatoryMaximum	25
CY2020Q4	rdn	Pmiers Disaster Related Capital Charge PMIERSDisasterRelatedCapitalCharge	0.30
CY2020Q4	rdn	Reduction In Capital Charges ReductionInCapitalCharges	0.70
CY2020Q4	rdn	Restricted Net Assets Held By Consolidated Subsidiaries RestrictedNetAssetsHeldByConsolidatedSubsidiaries	4100000000	USD
CY2020	rdn	Share Based Payment Arrangement Compensation Cost Excluding Amounts Deferred As Policy Acquisition Costs Net Of Income Taxes ShareBasedPaymentArrangementCompensationCostExcludingAmountsDeferredAsPolicyAcquisitionCostsNetOfIncomeTaxes	14929000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	19193000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	21414000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	17649000	USD
CY2020	rdn	Share Based Compensation Arrangement Amount Deferred As Policy Acquisition Cost ShareBasedCompensationArrangementAmountDeferredAsPolicyAcquisitionCost	0	USD
CY2019	rdn	Share Based Compensation Arrangement Amount Deferred As Policy Acquisition Cost ShareBasedCompensationArrangementAmountDeferredAsPolicyAcquisitionCost	373000	USD
CY2018	rdn	Share Based Compensation Arrangement Amount Deferred As Policy Acquisition Cost ShareBasedCompensationArrangementAmountDeferredAsPolicyAcquisitionCost	324000	USD
CY2020	rdn	Share Based Compensation Arrangement By Share Based Payment Award Compensation Cost Excluding Amounts Deferred As Policy Acquisition Costs Prior To Income Taxes ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationCostExcludingAmountsDeferredAsPolicyAcquisitionCostsPriorToIncomeTaxes	19193000	USD
CY2019	rdn	Share Based Compensation Arrangement By Share Based Payment Award Compensation Cost Excluding Amounts Deferred As Policy Acquisition Costs Prior To Income Taxes ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationCostExcludingAmountsDeferredAsPolicyAcquisitionCostsPriorToIncomeTaxes	21041000	USD
CY2018	rdn	Share Based Compensation Arrangement By Share Based Payment Award Compensation Cost Excluding Amounts Deferred As Policy Acquisition Costs Prior To Income Taxes ShareBasedCompensationArrangementByShareBasedPaymentAwardCompensationCostExcludingAmountsDeferredAsPolicyAcquisitionCostsPriorToIncomeTaxes	17325000	USD
CY2020	rdn	Share Based Payment Arrangement Expense Federal Income Tax Expense Benefit ShareBasedPaymentArrangementExpenseFederalIncomeTaxExpenseBenefit	-4264000	USD
CY2019	rdn	Share Based Payment Arrangement Expense Federal Income Tax Expense Benefit ShareBasedPaymentArrangementExpenseFederalIncomeTaxExpenseBenefit	-6343000	USD
CY2018	rdn	Share Based Payment Arrangement Expense Federal Income Tax Expense Benefit ShareBasedPaymentArrangementExpenseFederalIncomeTaxExpenseBenefit	-2863000	USD
CY2019	rdn	Share Based Payment Arrangement Compensation Cost Excluding Amounts Deferred As Policy Acquisition Costs Net Of Income Taxes ShareBasedPaymentArrangementCompensationCostExcludingAmountsDeferredAsPolicyAcquisitionCostsNetOfIncomeTaxes	14698000	USD
CY2018	rdn	Share Based Payment Arrangement Compensation Cost Excluding Amounts Deferred As Policy Acquisition Costs Net Of Income Taxes ShareBasedPaymentArrangementCompensationCostExcludingAmountsDeferredAsPolicyAcquisitionCostsNetOfIncomeTaxes	14462000	USD
CY2020	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	1
CY2020	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Amount DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount	19500	USD
CY2020	rdn	Defined Contribution Plan Employee Discretionary Contribution Maximum Amount DefinedContributionPlanEmployeeDiscretionaryContributionMaximumAmount	6500	USD
CY2020	us-gaap	Defined Contribution Plan Employers Matching Contribution Annual Vesting Percentage DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage	1
CY2020	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.060
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	7800000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5600000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	6100000	USD
CY2020Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	277415000	USD
CY2020Q2	us-gaap	Premiums Earned Net PremiumsEarnedNet	249295000	USD
CY2020Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	286471000	USD
CY2020Q4	us-gaap	Premiums Earned Net PremiumsEarnedNet	302140000	USD
CY2020	us-gaap	Premiums Earned Net PremiumsEarnedNet	1115321000	USD
CY2020Q1	rdn	Services Revenue Net ServicesRevenueNet	31927000	USD
CY2020Q2	rdn	Services Revenue Net ServicesRevenueNet	28075000	USD
CY2020Q3	rdn	Services Revenue Net ServicesRevenueNet	33943000	USD
CY2020Q4	rdn	Services Revenue Net ServicesRevenueNet	11440000	USD
CY2020	rdn	Services Revenue Net ServicesRevenueNet	105385000	USD
CY2020Q1	us-gaap	Net Investment Income NetInvestmentIncome	40944000	USD
CY2020Q2	us-gaap	Net Investment Income NetInvestmentIncome	38723000	USD
CY2020Q3	us-gaap	Net Investment Income NetInvestmentIncome	36255000	USD
CY2020Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	22141000	USD
CY2020Q4	us-gaap	Net Investment Income NetInvestmentIncome	38115000	USD
CY2020	us-gaap	Net Investment Income NetInvestmentIncome	154037000	USD
CY2020Q1	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	-22027000	USD
CY2020Q2	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	47276000	USD
CY2020Q3	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	17652000	USD
CY2020Q4	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	17376000	USD
CY2020	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	60277000	USD
CY2020Q1	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	35951000	USD
CY2020Q2	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	304418000	USD
CY2020Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	88084000	USD
CY2020Q4	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	56664000	USD
CY2020	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	485117000	USD
CY2020Q1	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	7413000	USD
CY2020Q2	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	6015000	USD
CY2020Q3	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	10166000	USD
CY2020Q4	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	7395000	USD
CY2020	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	30989000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	135103000	USD
CY2020Q2	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	17972000	USD
CY2020Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	24353000	USD
CY2020Q4	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	21600000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	86066000	USD
CY2020Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	69110000	USD
CY2020Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	60582000	USD
CY2020Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	69377000	USD
CY2020Q4	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	81641000	USD
CY2020	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	280710000	USD
CY2020Q1	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	979000	USD
CY2020Q2	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	979000	USD
CY2020Q3	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	961000	USD
CY2020Q4	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	2225000	USD
CY2020	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	5144000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	140461000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-29951000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	148013000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	393626000	USD
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.15
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.76
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.00
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	201819000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	193299000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	194156000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	194663000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	196642000	shares
CY2019Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	263512000	USD
CY2019Q2	us-gaap	Premiums Earned Net PremiumsEarnedNet	299166000	USD
CY2019Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	281185000	USD
CY2019Q4	us-gaap	Premiums Earned Net PremiumsEarnedNet	301486000	USD
CY2019Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	70046000	USD
CY2019	us-gaap	Premiums Earned Net PremiumsEarnedNet	1145349000	USD
CY2019Q1	rdn	Services Revenue Net ServicesRevenueNet	32753000	USD
CY2019Q2	rdn	Services Revenue Net ServicesRevenueNet	39303000	USD
CY2019Q3	rdn	Services Revenue Net ServicesRevenueNet	42509000	USD
CY2019Q4	rdn	Services Revenue Net ServicesRevenueNet	40031000	USD
CY2019	rdn	Services Revenue Net ServicesRevenueNet	154596000	USD
CY2019Q1	us-gaap	Net Investment Income NetInvestmentIncome	43847000	USD
CY2019Q2	us-gaap	Net Investment Income NetInvestmentIncome	43761000	USD
CY2019Q3	us-gaap	Net Investment Income NetInvestmentIncome	42756000	USD
CY2019Q4	us-gaap	Net Investment Income NetInvestmentIncome	41432000	USD
CY2019	us-gaap	Net Investment Income NetInvestmentIncome	171796000	USD
CY2019Q1	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	21913000	USD
CY2019Q2	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	12540000	USD
CY2019Q3	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	13009000	USD
CY2019Q4	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	4257000	USD
CY2019	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	51719000	USD
CY2019Q1	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	20754000	USD
CY2019Q2	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	47427000	USD
CY2019Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	29231000	USD
CY2019Q4	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	34619000	USD
CY2019	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	132031000	USD
CY2019Q1	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	5893000	USD
CY2019Q2	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	6203000	USD
CY2019Q3	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	6435000	USD
CY2019Q4	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	6783000	USD
CY2019	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	25314000	USD
CY2019Q1	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	24157000	USD
CY2019Q2	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	27845000	USD
CY2019Q3	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	29044000	USD
CY2019Q4	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	27278000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	108324000	USD
CY2019Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	78805000	USD
CY2019Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	76384000	USD
CY2019Q4	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	80894000	USD
CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	306129000	USD
CY2019Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019Q2	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-16798000	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5940000	USD
CY2019Q4	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22738000	USD
CY2019Q1	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019Q2	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019Q4	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	4828000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	4828000	USD
CY2019Q1	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	2187000	USD
CY2019Q2	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	2139000	USD
CY2019Q3	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	2139000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	166730000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	173438000	USD
CY2019Q4	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	15823000	USD
CY2019	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	22288000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	170957000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	161184000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	672309000	USD
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.78
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.78
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.79
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.20
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	218343000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	213603000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	208691000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	205165000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	210340000	shares
CY2020Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Cost SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost	6475530000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	-948000	USD
CY2020Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Fair Value SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue	6845941000	USD
CY2020Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Carrying Amount SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount	6845941000	USD
CY2020	rdn	Total Operating Expenses Allocatedto Subsidiaries From Parent Company TotalOperatingExpensesAllocatedtoSubsidiariesFromParentCompany	129870000	USD
CY2019	rdn	Total Operating Expenses Allocatedto Subsidiaries From Parent Company TotalOperatingExpensesAllocatedtoSubsidiariesFromParentCompany	124412000	USD
CY2018	rdn	Total Operating Expenses Allocatedto Subsidiaries From Parent Company TotalOperatingExpensesAllocatedtoSubsidiariesFromParentCompany	94815000	USD
CY2020	rdn	Total Interest Expense Allocatedto Subsidiaries From Parent Company TotalInterestExpenseAllocatedtoSubsidiariesFromParentCompany	68938000	USD
CY2019	rdn	Total Interest Expense Allocatedto Subsidiaries From Parent Company TotalInterestExpenseAllocatedtoSubsidiariesFromParentCompany	53692000	USD
CY2018	rdn	Total Interest Expense Allocatedto Subsidiaries From Parent Company TotalInterestExpenseAllocatedtoSubsidiariesFromParentCompany	42195000	USD
CY2020	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1286527000	USD
CY2020	us-gaap	Ceded Premiums Earned CededPremiumsEarned	183419000	USD
CY2020	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	12213000	USD
CY2020	us-gaap	Premiums Earned Net PremiumsEarnedNet	1115321000	USD
CY2020	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.0110
CY2019	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1244870000	USD
CY2019	us-gaap	Ceded Premiums Earned CededPremiumsEarned	109903000	USD
CY2019	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	10382000	USD
CY2019	us-gaap	Premiums Earned Net PremiumsEarnedNet	1145349000	USD
CY2019	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.0091
CY2018	us-gaap	Direct Premiums Earned DirectPremiumsEarned	1074298000	USD
CY2018	us-gaap	Ceded Premiums Earned CededPremiumsEarned	67195000	USD
CY2018	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	6904000	USD
CY2018	us-gaap	Premiums Earned Net PremiumsEarnedNet	1014007000	USD
CY2018	us-gaap	Premiums Percentage Assumed To Net PremiumsPercentageAssumedToNet	0.0068

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$RDN
RADIAN GROUP INC Stock $rdn

2020 Q4 Form 10-K Financial Statement

#000089092621000019 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

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$RDN RADIAN GROUP INC Stock $rdn

2020 Q4 Form 10-K Financial Statement

#000089092621000019 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$RDN
RADIAN GROUP INC Stock $rdn