$RDN
RADIAN GROUP INC Stock $rdn

$rdn Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000089092620000083 Filed on November 09, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q4
Revenue	$38.12M	$375.2M	$41.43M
YoY Change	-8.01%	-1.34%	-1.47%
Cost Of Revenue	$21.60M	$24.35M	$27.28M
YoY Change	-20.82%	-16.15%	9.38%
Gross Profit	$16.52M	$350.9M	$14.15M
YoY Change	16.68%	-0.12%	-17.29%
Gross Profit Margin	43.33%	93.51%	34.16%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$7.395M	$10.17M	$6.783M
YoY Change	9.02%	435.05%	4.6%
% of Gross Profit	44.78%	2.9%	47.92%
Operating Expenses	$162.5M	$214.0M	$165.4M
YoY Change	-1.75%	31.58%	18.74%
Operating Profit	-$146.0M	$136.9M	-$151.2M
YoY Change	-3.48%	-27.45%	23.78%
Interest Expense	-$21.20M	$21.09M	-$12.20M
YoY Change	73.77%	56.3%	-21.79%
% of Operating Profit		15.41%
Other Income/Expense, Net
YoY Change
Pretax Income	$179.2M	$161.2M	$205.6M
YoY Change	-12.84%	-25.94%	16.49%
Income Tax	$31.20M	$26.10M	$44.50M
% Of Pretax Income	17.41%	16.19%	21.64%
Net Earnings	$148.0M	$135.1M	$161.2M
YoY Change	-8.17%	-22.1%	15.31%
Net Earnings / Revenue	388.33%	36.0%	389.03%
Basic Earnings Per Share		$0.70
Diluted Earnings Per Share	$0.76	$0.70	$0.79
COMMON SHARES
Basic Shares Outstanding	191.6M shares	193.2M shares	201.1M shares
Diluted Shares Outstanding	194.7M shares	194.2M shares	205.2M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$87.92M	$82.02M	$92.73M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$121.3M	$145.2M	$93.60M
YoY Change	29.59%	0.76%	18.93%
LONG-TERM ASSETS
Property, Plant & Equipment	$80.46M	$27.17M	$87.88M
YoY Change	-8.45%	-20.88%	136.93%
Goodwill	$9.800M
YoY Change
Intangibles
YoY Change
Long-Term Investments	$6.788B	$6.585B	$5.659B
YoY Change	19.96%	18.99%	9.81%
Other Assets	$6.200M	$4.400M	$3.500M
YoY Change	77.14%	51.72%	-97.56%
Total Long-Term Assets	$7.827B	$7.632B	$6.715B
YoY Change	16.56%	16.94%	7.68%
TOTAL ASSETS
Total Short-Term Assets	$121.3M	$145.2M	$93.60M
Total Long-Term Assets	$7.827B	$7.632B	$6.715B
Total Assets	$7.948B	$7.777B	$6.808B
YoY Change	16.74%	16.59%	7.82%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$53.40M	$55.30M	$59.50M
YoY Change	-10.25%	-15.96%
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	$59.50M
YoY Change	-10.25%	-15.96%
LONG-TERM LIABILITIES
Long-Term Debt	$1.582B	$1.546B	$1.022B
YoY Change	54.81%	55.97%	-8.17%
Other Long-Term Liabilities	$238.5M	$241.4M	$354.7M
YoY Change	-32.76%	-17.5%	41.26%
Total Long-Term Liabilities	$1.821B	$1.787B	$1.377B
YoY Change	32.25%	39.22%	0.93%
TOTAL LIABILITIES
Total Short-Term Liabilities	$53.40M	$55.30M	$59.50M
Total Long-Term Liabilities	$1.821B	$1.787B	$1.377B
Total Liabilities	$3.664B	$3.655B	$2.760B
YoY Change	32.76%	33.0%	-2.35%
SHAREHOLDERS EQUITY
Retained Earnings	$2.685B	$2.561B	$2.390B
YoY Change	12.34%	14.89%	38.98%
Common Stock	$210.0K	$2.239B	$2.450B
YoY Change	-99.99%	-9.32%	-10.09%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$910.1M	$909.7M	$901.7M
YoY Change	0.94%	0.91%	0.76%
Treasury Stock Shares	18.52M shares	18.51M shares	17.96M shares
Shareholders Equity	$4.284B	$4.122B	$4.049B
YoY Change
Total Liabilities & Shareholders Equity	$7.948B	$7.777B	$6.808B
YoY Change	16.74%	16.59%	7.82%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q4
OPERATING ACTIVITIES
Net Income	$148.0M	$135.1M	$161.2M
YoY Change	-8.17%	-22.1%	15.31%
Depreciation, Depletion And Amortization	$7.395M	$10.17M	$6.783M
YoY Change	9.02%	435.05%	4.6%
Cash From Operating Activities	$159.6M	$193.5M	$187.6M
YoY Change	-14.93%	14.7%	0.91%
INVESTING ACTIVITIES
Capital Expenditures	-$2.300M	-$4.100M	-$6.900M
YoY Change	-66.67%	-25.45%	21.05%
Acquisitions
YoY Change
Other Investing Activities	-$143.3M	-$153.1M	-$132.2M
YoY Change	8.4%	1115.08%	-25.44%
Cash From Investing Activities	-$145.5M	-$157.3M	-$139.1M
YoY Change	4.6%	769.06%	-23.99%
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	-4.400M
YoY Change	47.73%	-80.62%	-56.86%
NET CHANGE
Cash From Operating Activities	159.6M	193.5M	187.6M
Cash From Investing Activities	-145.5M	-157.3M	-139.1M
Cash From Financing Activities	-6.500M	-34.40M	-4.400M
Net Change In Cash	7.600M	1.800M	44.10M
YoY Change	-82.77%	-106.69%	-704.11%
FREE CASH FLOW
Cash From Operating Activities	$159.6M	$193.5M	$187.6M
Capital Expenditures	-$2.300M	-$4.100M	-$6.900M
Free Cash Flow	$161.9M	$197.6M	$194.5M
YoY Change	-16.76%	13.43%	1.51%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Registrant Name EntityRegistrantName	Radian Group Inc
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Security Exchange Name SecurityExchangeName	NYSE
	dei	Entity Central Index Key EntityCentralIndexKey	0000890926
	dei	Document Type DocumentType	10-Q
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Amendment Flag AmendmentFlag	false
CY2020Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	191556568	shares
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2020-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	1-11356
	dei	Entity Registrant Name EntityRegistrantName	Radian Group Inc
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	23-2691170
	dei	Entity Address Address Line1 EntityAddressAddressLine1	1500 Market Street
	dei	Entity Address City Or Town EntityAddressCityOrTown	Philadelphia
	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	19102
	dei	City Area Code CityAreaCode	215
	dei	Local Phone Number LocalPhoneNumber	231-1000
	dei	Security12b Title Security12bTitle	Common Stock, $0.001 par value per share
	dei	Trading Symbol TradingSymbol	RDN
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	false
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
CY2020Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	191556568	shares
CY2020Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	-2290000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	5338536000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	4549534000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	5628992000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	4688911000	USD
CY2020Q3	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	262131000	USD
CY2019Q4	us-gaap	Trading Securities Debt Amortized Cost TradingSecuritiesDebtAmortizedCost	297505000	USD
CY2020Q3	us-gaap	Trading Securities Debt TradingSecuritiesDebt	291650000	USD
CY2019Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	317150000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	92638000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	125311000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	91317000	USD
CY2019Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	130221000	USD
CY2020Q3	rdn	Reinvested Cash Collateral Held Under Securities Lending Agreements ReinvestedCashCollateralHeldUnderSecuritiesLendingAgreements	33121000	USD
CY2019Q4	rdn	Reinvested Cash Collateral Held Under Securities Lending Agreements ReinvestedCashCollateralHeldUnderSecuritiesLendingAgreements	25561000	USD
CY2020Q3	us-gaap	Other Short Term Investments OtherShortTermInvestments	567146000	USD
CY2019Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	518393000	USD
CY2020Q3	us-gaap	Other Investments OtherInvestments	5472000	USD
CY2019Q4	us-gaap	Other Investments OtherInvestments	4072000	USD
CY2020Q3	us-gaap	Investments Investments	6584577000	USD
CY2019Q4	us-gaap	Investments Investments	5658747000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	82020000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	92729000	USD
CY2020Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	4424000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	3545000	USD
CY2020Q3	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	145164000	USD
CY2019Q4	us-gaap	Accounts And Notes Receivable Net AccountsAndNotesReceivableNet	93630000	USD
CY2020Q3	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	25268000	USD
CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	28187000	USD
CY2020Q3	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	295062000	USD
CY2019Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	363856000	USD
CY2020Q3	us-gaap	Other Assets OtherAssets	640830000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	567619000	USD
CY2020Q3	us-gaap	Assets Assets	7777345000	USD
CY2019Q4	us-gaap	Assets Assets	6808313000	USD
CY2020Q3	us-gaap	Unearned Premiums UnearnedPremiums	501787000	USD
CY2019Q4	us-gaap	Unearned Premiums UnearnedPremiums	626822000	USD
CY2020Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	825792000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	404765000	USD
CY2020Q3	us-gaap	Senior Notes SeniorNotes	1404759000	USD
CY2019Q4	us-gaap	Senior Notes SeniorNotes	887110000	USD
CY2020Q3	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	141058000	USD
CY2019Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	134875000	USD
CY2020Q3	us-gaap	Funds Held Under Reinsurance Agreements Liability FundsHeldUnderReinsuranceAgreementsLiability	318773000	USD
CY2019Q4	us-gaap	Funds Held Under Reinsurance Agreements Liability FundsHeldUnderReinsuranceAgreementsLiability	291829000	USD
CY2020Q3	us-gaap	Other Liabilities OtherLiabilities	462797000	USD
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	414189000	USD
CY2020Q3	us-gaap	Liabilities Liabilities	3654966000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	2759590000	USD
CY2020Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	485000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	485000000	shares
CY2020Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	210061000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	219123000	shares
CY2020Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	191556000	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	201164000	shares
CY2020Q3	us-gaap	Common Stock Value CommonStockValue	210000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	219000	USD
CY2020Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	18505000	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	17959000	shares
CY2020Q3	us-gaap	Treasury Stock Value TreasuryStockValue	909745000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	901657000	USD
CY2020Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2238869000	USD
CY2019Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	2449884000	USD
CY2020Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2561076000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2389789000	USD
CY2020Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	231969000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	110488000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	4122379000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	4048723000	USD
CY2020Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7777345000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6808313000	USD
CY2020Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	286471000	USD
CY2019Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	281185000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	813181000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	843863000	USD
CY2020Q3	rdn	Services Revenue Net ServicesRevenueNet	33943000	USD
CY2019Q3	rdn	Services Revenue Net ServicesRevenueNet	42509000	USD
	rdn	Services Revenue Net ServicesRevenueNet	93945000	USD
	rdn	Services Revenue Net ServicesRevenueNet	114565000	USD
CY2020Q3	us-gaap	Net Investment Income NetInvestmentIncome	36255000	USD
CY2019Q3	us-gaap	Net Investment Income NetInvestmentIncome	42756000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	115922000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	130364000	USD
CY2020Q3	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	17652000	USD
CY2019Q3	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	13009000	USD
	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	42901000	USD
	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	47462000	USD
CY2020Q3	us-gaap	Other Income OtherIncome	913000	USD
CY2019Q3	us-gaap	Other Income OtherIncome	879000	USD
	us-gaap	Other Income OtherIncome	2807000	USD
	us-gaap	Other Income OtherIncome	2677000	USD
CY2020Q3	us-gaap	Revenues Revenues	375234000	USD
CY2019Q3	us-gaap	Revenues Revenues	380338000	USD
	us-gaap	Revenues Revenues	1068756000	USD
	us-gaap	Revenues Revenues	1138931000	USD
CY2020Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	88084000	USD
CY2019Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	29231000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	428453000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	97412000	USD
CY2020Q3	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	10166000	USD
CY2019Q3	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	6435000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	23594000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	18531000	USD
CY2020Q3	rdn	Costof Services Real Estate CostofServicesRealEstate	24353000	USD
CY2019Q3	rdn	Costof Services Real Estate CostofServicesRealEstate	29044000	USD
	rdn	Costof Services Real Estate CostofServicesRealEstate	64466000	USD
	rdn	Costof Services Real Estate CostofServicesRealEstate	81046000	USD
CY2020Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	69377000	USD
CY2019Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	76384000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	199069000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	225235000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	21088000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	13492000	USD
	us-gaap	Interest Expense InterestExpense	49981000	USD
	us-gaap	Interest Expense InterestExpense	44150000	USD
CY2020Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5940000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22738000	USD
CY2020Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	961000	USD
CY2019Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2139000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2919000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6465000	USD
CY2020Q3	us-gaap	Operating Expenses OperatingExpenses	214029000	USD
CY2019Q3	us-gaap	Operating Expenses OperatingExpenses	162665000	USD
	us-gaap	Operating Expenses OperatingExpenses	768482000	USD
	us-gaap	Operating Expenses OperatingExpenses	495577000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	161205000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	217673000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	300274000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	643354000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26102000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	44235000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	54661000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	132229000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	135103000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	173438000	USD
	us-gaap	Net Income Loss NetIncomeLoss	245613000	USD
	us-gaap	Net Income Loss NetIncomeLoss	511125000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.25
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.45
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.25
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.39
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	193176000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	203107000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	196120000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	208561000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	194156000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	208691000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	197247000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	213963000	shares
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	135103000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	173438000	USD
	us-gaap	Net Income Loss NetIncomeLoss	245613000	USD
	us-gaap	Net Income Loss NetIncomeLoss	511125000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	30839000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	40654000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	143602000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	190677000	USD
CY2020Q3	rdn	Other Comprehensive Income Loss Reclassification Adjustment For Non Credit Related Impairments Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNonCreditRelatedImpairmentsNetOfTax	10884000	USD
CY2019Q3	rdn	Other Comprehensive Income Loss Reclassification Adjustment For Non Credit Related Impairments Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNonCreditRelatedImpairmentsNetOfTax	3477000	USD
	rdn	Other Comprehensive Income Loss Reclassification Adjustment For Non Credit Related Impairments Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNonCreditRelatedImpairmentsNetOfTax	24172000	USD
	rdn	Other Comprehensive Income Loss Reclassification Adjustment For Non Credit Related Impairments Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForNonCreditRelatedImpairmentsNetOfTax	4115000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	147000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-2051000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	19808000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	37177000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	121481000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	186562000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-3000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	19808000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	37177000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	121481000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	186559000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	154911000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	210615000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	367094000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	697684000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	498756000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	506805000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	894998000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	770393000	USD
	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	11602000	USD
	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	120875000	USD
	rdn	Proceedsfrom Saleof Equity Securities ProceedsfromSaleofEquitySecurities	77445000	USD
	rdn	Proceedsfrom Saleof Equity Securities ProceedsfromSaleofEquitySecurities	52295000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	443723000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	287557000	USD
	us-gaap	Proceeds From Maturities Repayments And Calls Of Trading Securities Heldforinvestment ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment	22112000	USD
	us-gaap	Proceeds From Maturities Repayments And Calls Of Trading Securities Heldforinvestment ProceedsFromMaturitiesRepaymentsAndCallsOfTradingSecuritiesHeldforinvestment	36827000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	2099281000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1352883000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	69206000	USD
	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	45748000	USD
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	21797000	USD
	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	12199000	USD
	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	989000	USD
	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	687000	USD
	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	16481000	USD
	us-gaap	Proceeds From Divestiture Of Businesses And Interests In Affiliates ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates	0	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	14723000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	20707000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-737657000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-162903000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	73365000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1559000	USD
	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	515567000	USD
	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	442498000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	610739000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1505000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2126000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	226305000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	275185000	USD
	rdn	Lineof Credit Facility Paymentof Commitment Fees LineofCreditFacilityPaymentofCommitmentFees	1993000	USD
	rdn	Lineof Credit Facility Paymentof Commitment Fees LineofCreditFacilityPaymentofCommitmentFees	710000	USD
	us-gaap	Increase Decrease In Securities Lending Payable IncreaseDecreaseInSecuritiesLendingPayable	-19191000	USD
	us-gaap	Increase Decrease In Securities Lending Payable IncreaseDecreaseInSecuritiesLendingPayable	9568000	USD
	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	138909000	USD
	us-gaap	Proceeds From Short Term Debt Maturing In More Than Three Months ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths	73011000	USD
	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	105977000	USD
	us-gaap	Repayments Of Short Term Debt Maturing In More Than Three Months RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths	37550000	USD
	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	79000	USD
	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	114000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	229071000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-398654000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	0	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-4000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-9830000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-54756000	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
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	86444000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	52246000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2020Q3	rdn	Reduction In Number Of New Defaults From The Prior Quarter ReductionInNumberOfNewDefaultsFromThePriorQuarter	-0.675
	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	Certain prior period amounts have been reclassified to conform to current period presentation.
	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 condensed consolidated financial statements include our best estimates and assumptions, actual results may vary materially.</span></div>
	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div style="margin-bottom:6pt;margin-top:8pt"><span style="color:#002b49;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 principals 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. 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 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. The amendments in this update 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 callable debt securities. We are currently evaluating the impact on our financial statements and future disclosures as a result of this update.</span></div>
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	135103000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	135103000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	173438000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	173438000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	245613000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	245613000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	511125000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	511125000	USD
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	193176000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	203107000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	196120000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	208561000	shares
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	980000	shares
CY2019Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	5584000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1127000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	5402000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	194156000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	208691000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	197247000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	213963000	shares
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.85
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.25
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.45
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.70
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.83
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.25
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.39
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2020Q3	rdn	Operating Income Loss Pre Tax Non Gaap OperatingIncomeLossPreTaxNonGAAP	139895000	USD
CY2019Q3	rdn	Operating Income Loss Pre Tax Non Gaap OperatingIncomeLossPreTaxNonGAAP	207060000	USD
	rdn	Operating Income Loss Pre Tax Non Gaap OperatingIncomeLossPreTaxNonGAAP	247557000	USD
	rdn	Operating Income Loss Pre Tax Non Gaap OperatingIncomeLossPreTaxNonGAAP	617704000	USD
CY2020Q3	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	17652000	USD
CY2019Q3	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	13009000	USD
	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	42901000	USD
	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	47462000	USD
CY2020Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5940000	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-22738000	USD
CY2020Q3	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	961000	USD
CY2019Q3	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	2139000	USD
	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	2919000	USD
	rdn	Increase Decreasein Goodwilland Intangible Assets IncreaseDecreaseinGoodwillandIntangibleAssets	6465000	USD
CY2020Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	466000	USD
CY2019Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	788000	USD
	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	5557000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	161205000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	217673000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	300274000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	643354000	USD
	rdn	Increase In Net Premiums Earned IncreaseInNetPremiumsEarned	32900000	USD
	rdn	Increase In Net Premiums Earned Per Share IncreaseInNetPremiumsEarnedPerShare	0.12
CY2020Q3	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	17652000	USD
CY2019Q3	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	13009000	USD
	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	42901000	USD
	rdn	Net Gains Losseson Investmentsand Other Financial Instruments NetGainsLossesonInvestmentsandOtherFinancialInstruments	47462000	USD
CY2020Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	0	USD
CY2019Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	0	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	247000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	0	USD
CY2020Q3	us-gaap	Revenues Revenues	375234000	USD
CY2019Q3	us-gaap	Revenues Revenues	380338000	USD
	us-gaap	Revenues Revenues	1068756000	USD
	us-gaap	Revenues Revenues	1138931000	USD
CY2020Q3	us-gaap	Interest Income Related Party InterestIncomeRelatedParty	1500000	USD
	us-gaap	Interest Income Related Party InterestIncomeRelatedParty	4000000.0	USD
CY2020Q3	rdn	Services Revenue Net ServicesRevenueNet	33943000	USD
CY2019Q3	rdn	Services Revenue Net ServicesRevenueNet	42509000	USD
	rdn	Services Revenue Net ServicesRevenueNet	93945000	USD
	rdn	Services Revenue Net ServicesRevenueNet	114565000	USD
CY2020Q3	us-gaap	Available For Sale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Less Than One Year AvailableForSaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsLessThanOneYear	309	security
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	930550000	USD
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	16906000	USD
CY2020Q3	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions Greater Than Or Equal To One Year AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsGreaterThanOrEqualToOneYear	37	security
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	160200000	USD
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	3590000	USD
CY2020Q3	us-gaap	Availableforsale Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions1 AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1	346	security
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	1090750000	USD
CY2020Q3	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	20496000	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
CY2020Q3	rdn	Realized Gains Losseson Investments Net RealizedGainsLossesonInvestmentsNet	13973000	USD
CY2019Q3	rdn	Realized Gains Losseson Investments Net RealizedGainsLossesonInvestmentsNet	4597000	USD
	rdn	Realized Gains Losseson Investments Net RealizedGainsLossesonInvestmentsNet	32636000	USD
	rdn	Realized Gains Losseson Investments Net RealizedGainsLossesonInvestmentsNet	4631000	USD
CY2020Q3	rdn	Other Than Temporary Impairment Losses Investments Due To Intent To Sell OtherThanTemporaryImpairmentLossesInvestmentsDueToIntentToSell	0	USD
CY2019Q3	rdn	Other Than Temporary Impairment Losses Investments Due To Intent To Sell OtherThanTemporaryImpairmentLossesInvestmentsDueToIntentToSell	0	USD
	rdn	Other Than Temporary Impairment Losses Investments Due To Intent To Sell OtherThanTemporaryImpairmentLossesInvestmentsDueToIntentToSell	1401000	USD
	rdn	Other Than Temporary Impairment Losses Investments Due To Intent To Sell OtherThanTemporaryImpairmentLossesInvestmentsDueToIntentToSell	0	USD
CY2020Q3	rdn	Other Than Temporary Impairment Losses Investments Expected Credit Losses OtherThanTemporaryImpairmentLossesInvestmentsExpectedCreditLosses	-186000	USD
CY2019Q3	rdn	Other Than Temporary Impairment Losses Investments Expected Credit Losses OtherThanTemporaryImpairmentLossesInvestmentsExpectedCreditLosses	0	USD
	rdn	Other Than Temporary Impairment Losses Investments Expected Credit Losses OtherThanTemporaryImpairmentLossesInvestmentsExpectedCreditLosses	2596000	USD
	rdn	Other Than Temporary Impairment Losses Investments Expected Credit Losses OtherThanTemporaryImpairmentLossesInvestmentsExpectedCreditLosses	0	USD
CY2020Q3	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	2813000	USD
CY2019Q3	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	4419000	USD
	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	916000	USD
	us-gaap	Unrealized Gain Loss On Securities UnrealizedGainLossOnSecurities	33005000	USD
CY2020Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	16972000	USD
CY2019Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	9016000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	29555000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	37636000	USD
CY2020Q3	rdn	Changein Unrealized Holding Gain Loss ChangeinUnrealizedHoldingGainLoss	3132000	USD
CY2019Q3	rdn	Changein Unrealized Holding Gain Loss ChangeinUnrealizedHoldingGainLoss	4742000	USD
	rdn	Changein Unrealized Holding Gain Loss ChangeinUnrealizedHoldingGainLoss	1984000	USD
	rdn	Changein Unrealized Holding Gain Loss ChangeinUnrealizedHoldingGainLoss	28068000	USD
	rdn	Goodwill Dispositions GoodwillDispositions	191297000	USD
	rdn	Accumulated Amortization Goodwill Dispositions AccumulatedAmortizationGoodwillDispositions	191297000	USD
	rdn	Goodwill Dispositions Net GoodwillDispositionsNet	0	USD
CY2020Q3	us-gaap	Direct Premiums Written DirectPremiumsWritten	269240000	USD
CY2019Q3	us-gaap	Direct Premiums Written DirectPremiumsWritten	287000000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	820267000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	828022000	USD
CY2020Q3	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	2942000	USD
CY2019Q3	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	2608000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	9585000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	7528000	USD
CY2020Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	9789000	USD
CY2019Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	15455000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	72912000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	39900000	USD
CY2020Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	262393000	USD
CY2019Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	274153000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	756940000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	795650000	USD
CY2020Q3	us-gaap	Direct Premiums Earned DirectPremiumsEarned	328728000	USD
CY2019Q3	us-gaap	Direct Premiums Earned DirectPremiumsEarned	305493000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	945287000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	919507000	USD
CY2020Q3	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	2946000	USD
CY2019Q3	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	2614000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	9599000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	7545000	USD
CY2020Q3	us-gaap	Ceded Premiums Earned CededPremiumsEarned	45203000	USD
CY2019Q3	us-gaap	Ceded Premiums Earned CededPremiumsEarned	26922000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	141705000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	83189000	USD
CY2020Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	286471000	USD
CY2019Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	281185000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	813181000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	843863000	USD
CY2020Q3	rdn	Ceding Commissions Earned CedingCommissionsEarned	17038000	USD
CY2019Q3	rdn	Ceding Commissions Earned CedingCommissionsEarned	12153000	USD
	rdn	Ceding Commissions Earned CedingCommissionsEarned	40457000	USD
	rdn	Ceding Commissions Earned CedingCommissionsEarned	37191000	USD
CY2019Q4	us-gaap	Prepaid Taxes PrepaidTaxes	134800000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	51786000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	4326000	USD
CY2020Q3	rdn	Unearned Ceding Commissions UnearnedCedingCommissions	59200000	USD
CY2020Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	10189000	USD
CY2019Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	771000	USD
CY2019Q3	rdn	Unearned Ceding Commissions UnearnedCedingCommissions	77800000	USD
CY2020Q3	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	256200000	USD
CY2019Q4	us-gaap	Funds Held Under Reinsurance Agreements Asset FundsHeldUnderReinsuranceAgreementsAsset	203200000	USD
CY2020Q3	us-gaap	Prepaid Taxes PrepaidTaxes	191889000	USD
CY2020Q3	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	112311000	USD
CY2019Q4	us-gaap	Life Insurance Corporate Or Bank Owned Amount LifeInsuranceCorporateOrBankOwnedAmount	105721000	USD
CY2020Q3	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	66515000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables On Paid And Unpaid Losses ReinsuranceRecoverablesOnPaidAndUnpaidLosses	16976000	USD
CY2020Q3	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	80060000	USD
CY2019Q4	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	73498000	USD
CY2020Q3	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	61549000	USD
CY2019Q4	us-gaap	Capitalized Computer Software Net CapitalizedComputerSoftwareNet	58356000	USD
CY2020Q3	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	57922000	USD
CY2019Q4	us-gaap	Securities Loaned Asset SecuritiesLoanedAsset	66442000	USD
CY2020Q3	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	36093000	USD
CY2019Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	32333000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	34662000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	37866000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	70519000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	68436000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	27168000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	29523000	USD
CY2020Q3	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	17926000	USD
CY2019Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	20759000	USD
CY2020Q3	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	8581000	USD
CY2019Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	13772000	USD
CY2020Q3	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
CY2020Q3	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	26214000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	26163000	USD
CY2020Q3	us-gaap	Other Assets OtherAssets	640830000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	567619000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	166100000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	71100000	USD
CY2020Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	825792000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	404765000	USD
	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	<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 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 premium deficiency reserve, for the periods indicated:</span></div><div><table style="border-collapse:collapse;display:inline-table;vertical-align:text-bottom;width:76.023%"><tr><td style="width:1.0%"/><td style="width:69.476%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.938%"/><td style="width:0.1%"/><td style="width:0.1%"/><td style="width:1.146%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:12.940%"/><td style="width:0.1%"/></tr><tr><td colspan="3" style="padding:0 1pt"/><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:8pt;font-weight:700;line-height:100%">Nine Months Ended<br/>September 30,</span></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:7pt;font-weight:700;line-height:120%">(In thousands)</span></td><td colspan="3" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2020</span></td><td colspan="3" style="background-color:#ffffff;border-left:1pt solid #bec7cc;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:8pt;font-weight:700;line-height:100%">2019</span></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:9pt;text-indent:-9pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Balance at beginning of period</span></div></td><td style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #000000;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:100%">$</span></td><td style="background-color:#bec7cc;border-top:1pt solid #000000;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:100%">401,273 </span></td><td style="background-color:#bec7cc;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">397,891 </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:9pt;text-indent:-9pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Less: Reinsurance recoverables </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:7pt;font-weight:700;line-height:100%">(1)</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></div></td><td colspan="2" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #bec7cc;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:100%">14,594 </span></td><td style="background-color:#bec7cc;border-top:1pt solid #bec7cc;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="2" style="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:100%">11,009 </span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:9pt;text-indent:-9pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Balance at beginning of period, net of reinsurance recoverables</span></div></td><td colspan="2" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #000000;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:100%">386,679 </span></td><td style="background-color:#bec7cc;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">386,882 </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:9pt;text-indent:-9pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Add: Losses and LAE incurred in respect of default notices reported and unreported in:</span></div></td><td colspan="3" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:18pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Current year </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:7pt;font-weight:700;line-height:100%">(2)</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:100%"> </span></div></td><td colspan="2" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #bec7cc;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:100%">448,584 </span></td><td style="background-color:#bec7cc;border-top:1pt solid #bec7cc;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="2" style="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:100%">107,866 </span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt 2px 18pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Prior years </span></td><td colspan="2" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #bec7cc;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:100%">(21,494)</span></td><td style="background-color:#bec7cc;border-top:1pt solid #bec7cc;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="2" style="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:100%">(10,579)</span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="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:100%">Total incurred</span></td><td colspan="2" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #000000;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:100%">427,090 </span></td><td style="background-color:#bec7cc;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">97,287 </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="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:100%">Deduct: Paid claims and LAE related to:</span></td><td colspan="3" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #000000;padding:0 1pt"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:18pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Current year </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:7pt;font-weight:700;line-height:100%">(2)</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></div></td><td colspan="2" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #bec7cc;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:100%">2,841 </span></td><td style="background-color:#bec7cc;border-top:1pt solid #bec7cc;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="2" style="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:100%">1,784 </span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt 2px 18pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Prior years</span></td><td colspan="2" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #bec7cc;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:100%">54,167 </span></td><td style="background-color:#bec7cc;border-top:1pt solid #bec7cc;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="2" style="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:100%">101,927 </span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:9pt;text-indent:-9pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Total paid</span></div></td><td colspan="2" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #000000;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:100%">57,008 </span></td><td style="background-color:#bec7cc;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">103,711 </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:9pt;text-indent:-9pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Balance at end of period, net of reinsurance recoverables</span></div></td><td colspan="2" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #000000;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:100%">756,761 </span></td><td style="background-color:#bec7cc;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="2" style="border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">380,458 </span></td><td style="border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:9pt;text-indent:-9pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Add: Reinsurance recoverables </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:7pt;font-weight:700;line-height:100%">(1)</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%"> </span></div></td><td colspan="2" style="background-color:#bec7cc;border-left:1pt solid #bec7cc;border-top:1pt solid #bec7cc;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:100%">64,947 </span></td><td style="background-color:#bec7cc;border-top:1pt solid #bec7cc;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td colspan="2" style="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:100%">13,629 </span></td><td style="padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="padding-left:9pt;text-indent:-9pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Balance at end of period</span></div></td><td style="background-color:#bec7cc;border-bottom:3pt double #000000;border-left:1pt solid #bec7cc;border-top:1pt solid #000000;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:100%">$</span></td><td style="background-color:#bec7cc;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">821,708 </span></td><td style="background-color:#bec7cc;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/><td colspan="3" style="border-left:1pt solid #bec7cc;padding:0 1pt"/><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">394,087 </span></td><td style="border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"/></tr></table></div><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">______________________ </span></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, if any, on reinsurance transactions. See Note 8 for additional information.</span></div><span style="color:#64615d;font-family:'Arial',sans-serif;font-size:8pt;font-weight:400;line-height:120%">(2)</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 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.</span>
	us-gaap	Federal Home Loan Bank Advances Maturity Period Fixed Rate FederalHomeLoanBankAdvancesMaturityPeriodFixedRate	P90D
	us-gaap	Federal Home Loan Bank Advances Maturity Period Fixed Rate FederalHomeLoanBankAdvancesMaturityPeriodFixedRate	P90D
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	34662000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	55334000	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y6M
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0671
CY2019Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2019Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.0025
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.125
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.125
CY2020Q1	rdn	Common Stock Dividends Announced CommonStockDividendsAnnounced	0.125
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.125
CY2019Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	0	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	-4000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	-1000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-3000	USD
CY2020Q3	rdn	Pmiers Disaster Related Capital Charge PMIERSDisasterRelatedCapitalCharge	0.30
CY2020Q3	rdn	Reduction In Capital Charges ReductionInCapitalCharges	0.70

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2020 Q4 Form 10-Q Financial Statement

#000089092620000083 Filed on November 09, 2020

Income Statement

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$RDN RADIAN GROUP INC Stock $rdn

2020 Q4 Form 10-Q Financial Statement

#000089092620000083 Filed on November 09, 2020

Income Statement

Balance Sheet

Cashflow Statement

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Files In Submission

$RDN
RADIAN GROUP INC Stock $rdn