Radian (RDN) 10-Q 5 Nov 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Document - $ / shares	9 Months Ended
	Sep. 30, 2021	Nov. 03, 2021	Dec. 31, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	1-11356
Entity Registrant Name	Radian Group Inc
Entity Tax Identification Number	23-2691170
City Area Code	215
Local Phone Number	231-1000
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	RDN
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		179,333,136
Entity Incorporation, State or Country Code	DE
Security Exchange Name	NYSE
Entity Central Index Key	0000890926
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19087
Entity Address, Address Line One	550 East Swedesford Road
Entity Address, Address Line Two	Suite 350
Entity Address, City or Town	Wayne
Former Address
Document Information [Line Items]
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19102
Entity Address, Address Line One	1500 Market Street
Entity Address, City or Town	Philadelphia
Parent Company
Document Information [Line Items]
Common Stock, Par or Stated Value Per Share	$ 0.001		$ 0.001

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) Statement - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Fixed-maturities available for sale—at fair value, net of allowance for credit losses of $0 and $948 (amortized cost of $5,391,584 and $5,393,623)	$ 5,580,212	$ 5,723,340
Trading securities—at fair value (amortized cost of $239,709 and $260,773)	263,363	290,885
Equity securities—at fair value (cost of $188,501 and $145,501)	193,498	151,240
Short-term investments—at fair value (includes $41,661 and $15,587 of reinvested cash collateral held under securities lending agreements)	617,515	618,004
Other invested assets—at fair value	3,899	4,973
Investments, Total	6,658,487	6,788,442
Cash	154,709	87,915
Restricted cash	1,866	6,231
Accrued investment income	33,258	34,047
Accounts and notes receivable	166,730	121,294
Reinsurance recoverables (includes $12 and $32 for paid losses)	76,048	73,202
Deferred policy acquisition costs	16,823	18,305
Property and equipment, net	74,170	80,457
Goodwill and other acquired intangible assets, net (Note 7)	20,456	23,043
Other assets (Note 9)	839,061	715,085
Assets, Total	8,041,608	7,948,021
Liabilities and Stockholders’ Equity
Unearned premiums	348,322	448,791
Reserve for losses and LAE (Note 11)	893,155	848,413
Senior notes (Note 12)	1,408,502	1,405,674
FHLB advances (Note 12)	172,649	176,483
Reinsurance funds withheld	290,502	278,555
Net deferred tax liability (Note 10)	286,957	213,897
Other Liabilities	383,585	291,855
Total liabilities	3,783,672	3,663,668
Stockholders’ equity
Common stock: par value $0.001 per share; 485,000 shares authorized at September 30, 2021 and December 31, 2020; 200,302 and 210,130 shares issued at September 30, 2021 and December 31, 2020, respectively; 181,336 and 191,606 shares outstanding at September 30, 2021 and December 31, 2020, respectively	200	210
Treasury stock, at cost: 18,966 and 18,524 shares at September 30, 2021 and December 31, 2020, respectively	(920,355)	(910,115)
Additional paid-in capital	2,012,870	2,245,897
Retained earnings	3,012,997	2,684,636
Accumulated other comprehensive income (loss) (Note 15)	152,224	263,725
Total stockholders’ equity	4,257,936	4,284,353
Total liabilities and stockholders’ equity	8,041,608	7,948,021
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	948
Fixed-maturities available for sale—at amortized cost	5,391,584	5,393,623
Debt Securities, Trading, Amortized Cost	239,709	260,773
Equity Securities, FV-NI, Cost	188,501	145,501
Reinvested Cash Collateral Held Under Securities Lending Agreements	41,661	15,587
Reinsurance Recoverables, Paid Losses	$ 12	$ 32
Parent Company
Stockholders’ equity
Common Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Common Stock, Shares Authorized	485,000,000	485,000,000
Common Stock, Shares, Issued	200,302,000	210,130,000
Common Stock, Shares, Outstanding	181,336,000	191,606,000
Treasury Stock, Shares	18,966,000	18,524,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Net premiums earned (Note 8)	$ 249,118	$ 286,471	$ 775,746	$ 813,181
Services revenue (Note 4)	37,773	33,943	90,132	93,945
Net investment income	35,960	36,255	110,502	115,922
Net gains (losses) on investments and other financial instruments	2,098	17,652	12,578	42,901
Other income	809	913	2,607	2,807
Total revenues	325,758	375,234	991,565	1,068,756
Expenses
Provision for losses	17,305	88,084	67,096	428,453
Policy acquisition costs	7,924	10,166	21,758	23,594
Cost of Services	30,520	24,353	75,381	64,466
Other operating expenses	86,479	69,377	243,210	199,069
Interest expense	21,027	21,088	63,207	49,981
Amortization and impairment of other acquired intangible assets	862	961	2,587	2,919
Total expenses	164,117	214,029	473,239	768,482
Consolidated pretax income (loss)	161,641	161,205	518,326	300,274
Income tax provision	35,229	26,102	111,100	54,661
Net income	$ 126,412	$ 135,103	$ 407,226	$ 245,613
Earnings Per Share, Basic [Abstract]
Basic net income (loss) per share	$ 0.68	$ 0.70	$ 2.13	$ 1.25
Earnings Per Share, Diluted [Abstract]
Diluted net income (loss) per share	$ 0.67	$ 0.70	$ 2.11	$ 1.25
Weighted-average number of common shares outstanding—basic	186,741	193,176	191,357	196,120
Weighted-average number of common and common equivalent shares outstanding—diluted	188,042	194,156	192,902	197,247

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income	$ 126,412	$ 135,103	$ 407,226	$ 245,613
Other comprehensive income (loss), net of tax (Note 15)
Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected losses has not been recognized	(23,394)	30,839	(106,286)	143,602
Net realized gains (losses) on disposals and non-credit related impairment losses	3,238	10,884	4,490	24,172
Net decrease (increase) in expected credit losses	0	147	725	(2,051)
Other comprehensive income (loss), net of tax	(26,632)	19,808	(111,501)	121,481
Comprehensive income	$ 99,780	$ 154,911	$ 295,725	$ 367,094

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes in Common Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Parent	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance, beginning of period at Dec. 31, 2019			$ 219	$ (901,657)	$ 2,449,884	$ 2,389,789	$ 110,488
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under incentive and benefit plans			2		3,096
Shares repurchased under share repurchase program (Note 14)			(11)		(226,294)
Repurchases of common stock under incentive plans				(8,088)
Share-based compensation					12,183
Net income	$ 245,613					245,613
Dividends and dividend equivalents declared						(74,326)
Net unrealized gains (losses) on investments, net of tax							121,481
Balance, end of period at Sep. 30, 2020		$ 4,122,379	210	(909,745)	2,238,869	2,561,076	231,969
Balance, beginning of period at Jun. 30, 2020			210	(909,738)	2,232,949	2,450,423	212,161
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under incentive and benefit plans			0		825
Shares repurchased under share repurchase program (Note 14)			0		0
Repurchases of common stock under incentive plans				(7)
Share-based compensation					5,095
Net income	135,103					135,103
Dividends and dividend equivalents declared						(24,450)
Net unrealized gains (losses) on investments, net of tax							19,808
Balance, end of period at Sep. 30, 2020		4,122,379	210	(909,745)	2,238,869	2,561,076	231,969
Balance, beginning of period at Dec. 31, 2020	4,284,353		210	(910,115)	2,245,897	2,684,636	263,725
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under incentive and benefit plans			1		2,944
Shares repurchased under share repurchase program (Note 14)			(11)		(256,967)
Repurchases of common stock under incentive plans				(10,240)
Share-based compensation					20,996
Net income	407,226					407,226
Dividends and dividend equivalents declared						(78,865)
Net unrealized gains (losses) on investments, net of tax							(111,501)
Balance, end of period at Sep. 30, 2021	4,257,936	4,257,936	200	(920,355)	2,012,870	3,012,997	152,224
Balance, beginning of period at Jun. 30, 2021			207	(920,225)	2,161,857	2,913,138	178,856
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under incentive and benefit plans			0		1,007
Shares repurchased under share repurchase program (Note 14)			(7)		(158,276)
Repurchases of common stock under incentive plans				(130)
Share-based compensation					8,282
Net income	126,412					126,412
Dividends and dividend equivalents declared						(26,553)
Net unrealized gains (losses) on investments, net of tax							(26,632)
Balance, end of period at Sep. 30, 2021	$ 4,257,936	$ 4,257,936	$ 200	$ (920,355)	$ 2,012,870	$ 3,012,997	$ 152,224

Note 15 - Accumulated Other Com

Note 15 - Accumulated Other Comprehensive Income (Loss) (Note)	9 Months Ended
	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income (Loss) The following tables show the rollforward of accumulated other comprehensive income (loss) as of the periods indicated. Rollforward of accumulated other comprehensive income Three Months Ended Nine Months Ended (In thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Balance at beginning of period $ 226,400 $ 47,544 $ 178,856 $ 333,829 $ 70,104 $ 263,725 Other comprehensive income (loss) Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected credit losses has not been recognized (29,613) (6,219) (23,394) (134,539) (28,253) (106,286) Less: Reclassification adjustment for net gains (losses) on investments included in net income (1) Net realized gains (losses) on disposals and non-credit related impairment losses 4,099 861 3,238 5,684 1,194 4,490 Net decrease (increase) in expected credit losses — — — 918 193 725 Other comprehensive income (loss) (33,712) (7,080) (26,632) (141,141) (29,640) (111,501) Balance at end of period $ 192,688 $ 40,464 $ 152,224 $ 192,688 $ 40,464 $ 152,224 Three Months Ended Nine Months Ended (In thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Balance at beginning of period $ 268,558 $ 56,397 $ 212,161 $ 139,858 $ 29,370 $ 110,488 Other comprehensive income (loss) Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected credit losses has not been recognized 39,037 8,198 30,839 181,775 38,173 143,602 Less: Reclassification adjustment for net gains (losses) on investments included in net income (1) Net realized gains (losses) on disposals and non-credit related impairment losses 13,777 2,893 10,884 30,597 6,425 24,172 Net decrease (increase) in expected credit losses 186 39 147 (2,596) (545) (2,051) Other comprehensive income (loss) 25,074 5,266 19,808 153,774 32,293 121,481 Balance at end of period $ 293,632 $ 61,663 $ 231,969 $ 293,632 $ 61,663 $ 231,969 (1) Included in net gains (losses) on investments and other financial instruments on our condensed consolidated statements of operations.

Note 15 - Accumulated Other C_2

Note 15 - Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following tables show the rollforward of accumulated other comprehensive income (loss) as of the periods indicated. Rollforward of accumulated other comprehensive income Three Months Ended Nine Months Ended (In thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Balance at beginning of period $ 226,400 $ 47,544 $ 178,856 $ 333,829 $ 70,104 $ 263,725 Other comprehensive income (loss) Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected credit losses has not been recognized (29,613) (6,219) (23,394) (134,539) (28,253) (106,286) Less: Reclassification adjustment for net gains (losses) on investments included in net income (1) Net realized gains (losses) on disposals and non-credit related impairment losses 4,099 861 3,238 5,684 1,194 4,490 Net decrease (increase) in expected credit losses — — — 918 193 725 Other comprehensive income (loss) (33,712) (7,080) (26,632) (141,141) (29,640) (111,501) Balance at end of period $ 192,688 $ 40,464 $ 152,224 $ 192,688 $ 40,464 $ 152,224 Three Months Ended Nine Months Ended (In thousands) Before Tax Tax Effect Net of Tax Before Tax Tax Effect Net of Tax Balance at beginning of period $ 268,558 $ 56,397 $ 212,161 $ 139,858 $ 29,370 $ 110,488 Other comprehensive income (loss) Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected credit losses has not been recognized 39,037 8,198 30,839 181,775 38,173 143,602 Less: Reclassification adjustment for net gains (losses) on investments included in net income (1) Net realized gains (losses) on disposals and non-credit related impairment losses 13,777 2,893 10,884 30,597 6,425 24,172 Net decrease (increase) in expected credit losses 186 39 147 (2,596) (545) (2,051) Other comprehensive income (loss) 25,074 5,266 19,808 153,774 32,293 121,481 Balance at end of period $ 293,632 $ 61,663 $ 231,969 $ 293,632 $ 61,663 $ 231,969 (1) Included in net gains (losses) on investments and other financial instruments on our condensed consolidated statements of operations.

Note 11 - Losses and LAE - Rese

Note 11 - Losses and LAE - Reserve for Losses and LAE by Segment - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Liability for Claims and Claims Adjustment Expense [Line Items]
Reserve for losses and loss adjustment expense	$ 893,155	$ 848,413
Mortgage insurance loss reserves
Liability for Claims and Claims Adjustment Expense [Line Items]
Reserve for losses and loss adjustment expense	888,021	844,107
Title insurance loss reserves
Liability for Claims and Claims Adjustment Expense [Line Items]
Reserve for losses and loss adjustment expense	5,134	4,306
First Lien Mortgage Insurance Products | Mortgage insurance loss reserves | Primary Case Reserves
Liability for Claims and Claims Adjustment Expense [Line Items]
Reserve for losses and loss adjustment expense	$ 851,200	$ 799,500

Note 15 - Accumulated Other C_3

Note 15 - Accumulated Other Comprehensive Income (Loss) - Rollforward of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Comprehensive Income, Net of Tax [Abstract]
AOCI, Net of Tax, Balance at beginning of period			$ 263,725
Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected credit losses has not been recognized	$ (23,394)	$ 30,839	(106,286)	$ 143,602
Net realized gains (losses) on disposals and non-credit related impairment losses	3,238	10,884	4,490	24,172
Net decrease (increase) in expected credit losses	0	147	725	(2,051)
Other comprehensive income (loss), net of tax	(26,632)	19,808	(111,501)	121,481
AOCI, Net of Tax, Balance at end of period	152,224		152,224
Other Comprehensive Income
Other Comprehensive Income, before Tax [Abstract]
AOCI before Tax, Balance at beginning of period	226,400	268,558	333,829	139,858
Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected credit losses has not been recognized	(29,613)	39,037	(134,539)	181,775
Net realized gains (losses) on disposals and non-credit related impairment losses	4,099	13,777	5,684	30,597
Net decrease (increase) in expected credit losses	0	186	918	(2,596)
Other comprehensive income (loss)	(33,712)	25,074	(141,141)	153,774
AOCI before Tax, Balance at end of period	192,688	293,632	192,688	293,632
Other Comprehensive Income, Tax [Abstract]
AOCI, Tax, Balance at beginning of period	47,544	56,397	70,104	29,370
Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected credit losses has not been recognized	(6,219)	8,198	(28,253)	38,173
Net realized gains (losses) on disposals and non-credit related impairment losses	861	2,893	1,194	6,425
Net decrease (increase) in expected credit losses	0	39	193	(545)
Other comprehensive income (loss)	(7,080)	5,266	(29,640)	32,293
AOCI Tax, Balance at end of period	40,464	61,663	40,464	61,663
Other Comprehensive Income, Net of Tax [Abstract]
AOCI, Net of Tax, Balance at beginning of period	178,856	212,161	263,725	110,488
Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected credit losses has not been recognized	(23,394)	30,839	(106,286)	143,602
Net realized gains (losses) on disposals and non-credit related impairment losses	3,238	10,884	4,490	24,172
Net decrease (increase) in expected credit losses	0	147	725	(2,051)
Other comprehensive income (loss), net of tax	(26,632)	19,808	(111,501)	121,481
AOCI, Net of Tax, Balance at end of period	$ 152,224	$ 231,969	$ 152,224	$ 231,969

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net Cash Provided by (Used in) Operating Activities	$ 403,304	$ 498,756
Cash Flows from Investing Activities
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale	536,387	894,998
Proceeds from Sales of Trading Securities	7,952	11,602
Proceeds from Sales of Equity Securities	29,289	77,445
Proceeds from Redemption of Fixed-Maturity Investments Available for sale	917,027	443,723
Proceeds from Redemptions of Trading securities	11,703	22,112
Purchases of Fixed-maturities Available-for-sale	(1,413,445)	(2,099,281)
Purchases of Equity Securities	(102,956)	(69,206)
Sales, Redemptions and (Purchases) of Short-term Investments, Net	(17,474)	(21,797)
Payments for (Proceeds from) Other Investing Activities	6,253	989
Proceeds from sale of subsidiary, net of cash sold	0	16,481
Purchases of property and equipment	(8,720)	(14,723)
Net cash provided by (used in) investing activities	(33,984)	(737,657)
Cash Flows from Financing Activities
Dividends and dividend equivalents paid	(78,165)	(73,365)
Issuance of senior notes, net	0	515,567
Issuance of common stock	1,225	1,505
Repurchases of common stock	(251,482)	(226,305)
Credit facility commitment fees paid	(710)	(1,993)
Change in secured borrowings, net (with terms three months or less)	38,241	(19,191)
Proceeds from secured borrowings (with terms greater than 3 months)	32,000	138,909
Payments of secured borrowings (with terms greater than 3 months)	(48,000)	(105,977)
Repayments of other borrowings	0	(79)
Net cash provided by (used in) financing activities	(306,891)	229,071
Increase (decrease) in cash and restricted cash	62,429	(9,830)
Cash and restricted cash, beginning of period	94,146	96,274
Cash and restricted cash, end of period	$ 156,575	$ 86,444

Note 1 - Description of Busines

Note 1 - Description of Business (Note)	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]	Description of Business We are a diversified mortgage and real estate business, providing both credit-related mortgage insurance coverage and a broad array of other mortgage, risk, title, valuation, asset management, SaaS and other real estate services. We have two reportable business segments—Mortgage and homegenius. Our homegenius segment was previously named “Real Estate” and during the second quarter of 2021 we renamed it “homegenius” to align with updates to our branding strategy for the segment’s products and services. Mortgage Our Mortgage segment provides credit-related insurance coverage, principally through private mortgage insurance on residential first-lien mortgage loans, as well as other credit risk management, contract underwriting and fulfillment solutions, to mortgage lending institutions and mortgage credit investors. We provide our mortgage insurance products and services mainly through our wholly-owned subsidiary, Radian Guaranty. Private mortgage insurance plays an important role in the U.S. housing finance system because it promotes affordable home ownership and helps protect mortgage lenders and investors, as well as other beneficiaries, by mitigating default-related losses on residential mortgage loans. Generally, these loans are made to homebuyers who make down payments of less than 20% of the purchase price for their home or, in the case of refinancings, have less than 20% equity in their home. Private mortgage insurance also facilitates the sale of these low down payment loans in the secondary mortgage market, most of which are currently sold to the GSEs. Our total direct primary mortgage IIF and RIF were $241.6 billion and $59.4 billion, respectively, as of September 30, 2021, compared to $246.1 billion and $60.7 billion, respectively, as of December 31, 2020. In addition to providing private mortgage insurance, we participate in credit risk transfer programs developed by the GSEs as part of their initiative to distribute mortgage credit risk and increase the role of private capital in the mortgage market. Our additional RIF under credit risk transfer transactions, resulting from our participation in these programs with the GSEs, totaled $429.3 million as of September 30, 2021 compared to $392.0 million as of December 31, 2020. The GSEs and state insurance regulators impose various capital and financial requirements on our mortgage insurance subsidiaries. These include Risk-to-capital, other risk-based capital measures and surplus requirements, as well as the PMIERs financial requirements. Failure to comply with these capital and financial requirements may limit the amount of insurance that our mortgage insurance subsidiaries write or may prohibit them from writing insurance altogether. The GSEs and state insurance regulators possess significant discretion with respect to our mortgage insurance subsidiaries and all aspects of their business. See Note 16 for additional information on PMIERs and other regulatory information, and “—Recent Developments” below for a discussion of the elevated risks posed by the COVID-19 pandemic, which has led to an increase in mortgage defaults in our insured portfolio and a resulting increase in our Minimum Required Assets. homegenius Our homegenius segment is primarily a fee-for-service business that offers a broad array of products and services to market participants across the real estate value chain. Our homegenius products and services include title, valuation, asset management, SaaS and other real estate services offered primarily to mortgage lenders, mortgage and real estate investors, GSEs, real estate brokers and agents. These products and services help lenders, investors, consumers and real estate agents evaluate, manage, monitor, acquire and sell properties. These products and services include SaaS solutions and platforms, as well as managed services, such as real estate owned asset management, single family rental services and real estate valuation services. In addition, we provide title insurance and non-insurance title, closing and settlement services to mortgage lenders, GSEs and mortgage investors, as well as directly to consumers for residential mortgage loans. See Note 4 for additional information about our reportable segments and All Other business activities. COVID-19 Developments As a seller of mortgage credit protection, our results are subject to macroeconomic conditions and specific events that impact the housing finance and real estate markets, including events that impact mortgage originations and the credit performance of our RIF. Many of these conditions are beyond our control, including housing prices, unemployment, interest rate changes, the availability of credit and other factors that may be derived from national and regional economic conditions. In general, a deterioration in economic conditions increases the likelihood that borrowers will be unable to satisfy their mortgage obligations. A deteriorating economy can adversely affect housing values, which in turn can influence the willingness of borrowers to continue to make mortgage payments regardless of whether they have the financial resources to do so. Mortgage defaults can also occur due to a variety of specific events affecting borrowers, including death or illness, divorce or other family problems, unemployment, or other events. In addition, factors impacting regional economic conditions, acts of terrorism, war or other severe conflicts, event-specific economic depressions or other catastrophic events, such as natural disasters and pandemics, could result in increased defaults due to the impact of such events on the ability of borrowers to satisfy their mortgage obligations and on the value of affected homes. The unprecedented and continually evolving social and economic impacts associated with the COVID-19 pandemic on the U.S. and global economies that began in early 2020 had a negative effect on our business and our financial results for the second quarter of 2020, and since then to a lesser extent, as further discussed below. Specifically, and primarily as a result of a sharp increase in the number of new defaults during the second quarter of 2020, our financial results in 2020 included: (i) an increase in both provision for losses and reserve for losses and (ii) an increase in our Minimum Required Assets under the PMIERs. However, beginning in the third quarter of 2020 and continuing throughout 2021, the number of new defaults has decreased significantly and has now returned to levels experienced prior to the start of the pandemic. These trends, combined with strong home price appreciation and favorable outcomes from mortgage forbearance programs implemented during the pandemic to assist homeowners, have led to favorable reserve development during 2021 on prior year defaults. See Note 11 for additional information on our reserve for losses. In addition, in response to the threat posed to the economy from the COVID-19 pandemic, in early 2020 the Federal Reserve enacted certain protective measures, to support the economy that resulted in a drop in interest rates generally, and in mortgage rates specifically, resulting in increased mortgage refinance activity. While these developments have benefited our NIW volumes, the low interest rate environment in recent periods has resulted in a high level of refinance activity and associated increase in policy cancellations, which has reduced our Persistency Rate, and in turn contributed to a reduction in our IIF, particularly as a result of a decline in our Single Premium Policies. In the second quarter of 2021 this refinance activity began to moderate, and this trend has continued in the three months ended September 30, 2021. While recent trends have been favorable, the long-term impact of the COVID-19 pandemic on our businesses will depend on, among other things: the extent and duration of the pandemic, the severity of illness and number of people infected with the virus and the acceptance and long-term effectiveness of anti-viral treatments and vaccines, especially as new strains of COVID-19 have emerged; the wider economic effects of the pandemic and the scope and duration of governmental and other third-party measures restricting day-to-day life and business operations; the impact of economic stimulus efforts to support the economy through the pandemic; and governmental and GSE programs implemented to assist borrowers experiencing a COVID-19-related hardship, including forbearance programs and forbearance exit programs, as well as suspensions of foreclosures and evictions.

Note 2 - Significant Accounting

Note 2 - Significant Accounting Policies (Note)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Basis of Presentation Our condensed consolidated financial statements are prepared in accordance with GAAP and include the accounts of Radian Group Inc. and its subsidiaries. All intercompany accounts and transactions, and intercompany profits and losses, have been eliminated. We have condensed or omitted certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with GAAP pursuant to the instructions set forth in Article 10 of Regulation S-X of the SEC. We refer to Radian Group Inc. together with its consolidated subsidiaries as “Radian,” the “Company,” “we,” “us” or “our,” unless the context requires otherwise. We generally refer to Radian Group Inc. alone, without its consolidated subsidiaries, as “Radian Group.” Unless otherwise defined in this report, certain terms and acronyms used throughout this report are defined in the Glossary of Abbreviations and Acronyms included as part of this report. The financial information presented for interim periods is unaudited; however, such information reflects all adjustments that are, in the opinion of management, necessary for the fair statement of the financial position, results of operations, comprehensive income (loss) and cash flows for the interim periods presented. Such adjustments are of a normal recurring nature. The year-end condensed balance sheet data was derived from our audited financial statements, but does not include all disclosures required by GAAP. To fully understand the basis of presentation, these interim financial statements and related notes contained herein should be read in conjunction with the audited financial statements and notes thereto included in our 2020 Form 10-K. The results of operations for interim periods are not necessarily indicative of results to be expected for the full year or for any other period. Certain prior period amounts have been reclassified to conform to current period presentation, including: (i) certain balance sheet line items now reported in other assets and (ii) certain segment reporting balances due to changes in the composition of our segments during 2020. Use of Estimates 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. Other Significant Accounting Policies See Note 2 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for information regarding other significant accounting policies. There have been no significant changes in our significant accounting policies from those discussed in our 2020 Form 10-K, other than described below in “—Recent Accounting Pronouncements—Accounting Standards Adopted During 2021.” Recent Accounting Pronouncements Accounting Standards Adopted During 2021 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 and clarifies certain aspects to promote consistency among reporting entities. We adopted this update effective January 1, 2021. The adoption of this update did not have an impact on our financial statements and disclosures. 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, for each reporting period, to the extent the amortized cost basis of an individual callable debt security exceeds the amount repayable by the issuer at the next call date, the excess (i.e., the premium) should be amortized to the next call date. We adopted ASU 2020-08 on January 1, 2021 on a prospective basis. The adoption of this update did not have a material impact on our financial statements and disclosures. Accounting Standards Not Yet Adopted 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. 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.

Note 3 - Net Income (Loss) Per

Note 3 - Net Income (Loss) Per Share (Note)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Net Income Per Share	Net Income Per Share Basic net income per share is computed by dividing net income by the weighted-average number of common shares outstanding, while diluted net income per share is computed by dividing net income attributable to common stockholders by the sum of the weighted-average number of common shares outstanding and the weighted-average number of dilutive potential common shares. Dilutive potential common shares relate to our share-based compensation arrangements. The calculation of basic and diluted net income per share is as follows. Net income per share Three Months Ended Nine Months Ended (In thousands, except per-share amounts) 2021 2020 2021 2020 Net income—basic and diluted $ 126,412 $ 135,103 $ 407,226 $ 245,613 Average common shares outstanding—basic 186,741 193,176 191,357 196,120 Dilutive effect of share-based compensation arrangements (1) 1,301 980 1,545 1,127 Adjusted average common shares outstanding—diluted 188,042 194,156 192,902 197,247 Net income per share: Basic $ 0.68 $ 0.70 $ 2.13 $ 1.25 Diluted $ 0.67 $ 0.70 $ 2.11 $ 1.25 (1) The following number of shares of our common stock equivalents issued under our share-based compensation arrangements are not included in the calculation of diluted net income per share because they are anti-dilutive. Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Shares of common stock equivalents — 710 — 1,046

Note 4 - Segment Reporting (Not

Note 4 - Segment Reporting (Note)	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting We have two strategic business units that we manage separately—Mortgage and homegenius. Our Mortgage segment derives its revenue from mortgage insurance and other mortgage and risk services, including contract underwriting and fulfillment solutions provided to mortgage lending institutions and mortgage credit investors. Our homegenius segment offers a broad array of title, valuation, asset management, SaaS and other real estate services to mortgage lenders, mortgage and real estate investors, GSEs, real estate brokers and agents. In addition, we report as All Other activities that include: (i) income (losses) from assets held by our holding company; (ii) related general corporate operating expenses not attributable or allocated to our reportable segments; (iii) for all periods through its sale in January 2020, income and expenses related to Clayton; (iv) for all periods presented, the income and expenses related to our traditional appraisal services, which we wound down beginning in the fourth quarter of 2020; and (v) certain other immaterial revenue and expense items. As described in Note 4 of Notes to Consolidated Financial Statements in our 2020 Form 10-K, we implemented several changes to our segment reporting in 2020, including related to the wind down of our traditional appraisal business announced in the fourth quarter of 2020. All changes to the composition of our segment reporting have been reflected in our segment operating results for all periods presented. During the second quarter of 2021, our Real Estate segment was renamed “homegenius” to align with updates to our branding strategy for the segment’s products and services. The homegenius segment name change had no impact on the composition of our segments or on our previously reported historical financial position, results of operations, cash flow or segment level results. We allocate corporate operating expenses to both reportable segments based on each segment’s forecasted annual percentage of total revenue, which approximates the estimated percentage of management time spent on each segment. In addition, we allocate all corporate interest expense to our Mortgage segment, due to the capital-intensive nature of our mortgage insurance business. With the exception of goodwill and other acquired intangible assets that relate to our homegenius segment, which are reviewed as part of our annual goodwill impairment assessment, we do not manage assets by segment. See Note 1 for additional details about our Mortgage and homegenius businesses. Adjusted Pretax Operating Income (Loss) Our senior management, including our Chief Executive Officer (Radian’s chief operating decision maker), uses adjusted pretax operating income (loss) as our primary measure to evaluate the fundamental financial performance of each of Radian’s business segments and to allocate resources to the segments. Adjusted pretax operating income (loss) is defined as pretax income (loss) excluding the effects of: (i) net gains (losses) on investments and other financial instruments; (ii) loss on extinguishment of debt; (iii) amortization and impairment of goodwill and other acquired intangible assets; and (iv) impairment of other long-lived assets and other non-operating items, such as impairment of internal-use software, gains (losses) from the sale of lines of business and acquisition-related income and expenses. See Note 4 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for detailed information regarding items excluded from adjusted pretax operating income (loss), including the reasons for their treatment. Although adjusted pretax operating income (loss) excludes certain items that have occurred in the past and are expected to occur in the future, the excluded items represent those that are: (i) not viewed as part of the operating performance of our primary activities or (ii) not expected to result in an economic impact equal to the amount reflected in pretax income (loss). The reconciliation of adjusted pretax operating income (loss) for our reportable segments to consolidated pretax income (loss) is as follows. Reconciliation of adjusted pretax operating income (loss) by segment Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Adjusted pretax operating income (loss) Mortgage $ 163,124 $ 147,336 $ 528,873 $ 267,182 homegenius (5,557) (5,046) (25,208) (12,108) Total adjusted pretax operating income (loss) for reportable segments (1) 157,567 142,290 503,665 255,074 All Other adjusted pretax operating income (loss) 3,082 2,690 9,019 6,006 Net gains (losses) on investments and other financial instruments 2,098 17,652 12,578 42,901 Amortization and impairment of other acquired intangible assets (862) (961) (2,587) (2,919) Impairment of other long-lived assets and other non-operating items (244) (466) (4,349) (788) Consolidated pretax income $ 161,641 $ 161,205 $ 518,326 $ 300,274 (1) Includes allocated corporate operating expenses and depreciation expense as follows. Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Mortgage Allocated corporate operating expenses (a) $ 34,341 $ 29,127 $ 95,225 $ 83,700 Direct depreciation expense 2,240 2,895 7,342 9,719 homegenius Allocated corporate operating expenses (b) $ 4,918 $ 3,248 $ 13,635 $ 9,438 Direct depreciation expense 639 679 1,828 2,113 (a) Includes allocated depreciation expense of $0.8 million and $2.5 million for the three and nine months ended September 30, 2021, respectively, and $0.8 million and $1.7 million for the three and nine months ended September 30, 2020, respectively. (b) Includes allocated depreciation expense of $0.1 million and $0.4 million for the three and nine months ended September 30, 2021, respectively, and $0.1 million and $0.2 million for the three and nine months ended September 30, 2020, respectively. Revenue The reconciliation of revenue for our reportable segments to consolidated revenues is as follows. Reconciliation of revenues by segment Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Revenues Mortgage (1) $ 274,659 $ 320,013 $ 862,757 $ 922,040 homegenius (2) 45,091 29,793 104,337 78,866 Total revenues for reportable segments 319,750 349,806 967,094 1,000,906 All Other revenues (1) 3,996 8,641 12,100 25,869 Net gains (losses) on investments and other financial instruments 2,098 17,652 12,578 42,901 Other non-operating revenue — — — 247 Elimination of inter-segment revenues (86) (865) (207) (1,167) Total revenues $ 325,758 $ 375,234 $ 991,565 $ 1,068,756 (1) Includes immaterial inter-segment revenues for the nine months ended September 30, 2020. (2) Includes immaterial inter-segment revenues for the three and nine months ended September 30, 2021 and 2020. The table below, which represents total services revenue on our condensed consolidated statements of operations for the periods indicated, represents the disaggregation of services revenues from external customers, by type. Services revenue Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 homegenius services Title services $ 12,926 $ 5,085 $ 30,382 $ 17,671 Asset management services 9,538 7,379 20,976 22,275 Valuation services 9,418 7,177 22,798 17,195 SaaS and other real estate services 837 2,120 2,742 5,340 Mortgage services 5,027 3,914 13,110 10,965 All Other services (1) 27 8,268 124 20,499 Total services revenue $ 37,773 $ 33,943 $ 90,132 $ 93,945 (1) Includes services revenue from Clayton prior to its sale in January 2020 and amounts related to our traditional appraisal business, which we wound down beginning in the fourth quarter of 2020.

Note 5 - Fair Value of Financia

Note 5 - Fair Value of Financial Instruments (Note)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments For discussion of our valuation methodologies for assets and liabilities measured at fair value and the fair value hierarchy, see Note 5 of Notes to Consolidated Financial Statements in our 2020 Form 10-K. The following tables include a list of assets that are measured at fair value by hierarchy level as of September 30, 2021 and December 31, 2020. Assets carried at fair value by hierarchy level September 30, 2021 (In thousands) Level I Level II Level III Total Investments Fixed-maturities available for sale U.S. government and agency securities $ 225,540 $ 29,618 $ — $ 255,158 State and municipal obligations — 161,011 — 161,011 Corporate bonds and notes — 2,936,922 — 2,936,922 RMBS — 713,106 — 713,106 CMBS — 706,641 — 706,641 CLO — 559,320 — 559,320 Other ABS — 195,019 — 195,019 Foreign government and agency securities — 5,344 — 5,344 Mortgage insurance-linked notes (1) — 47,691 — 47,691 Total fixed-maturities available for sale 225,540 5,354,672 — 5,580,212 Trading securities State and municipal obligations — 99,329 — 99,329 Corporate bonds and notes — 120,298 — 120,298 RMBS — 10,147 — 10,147 CMBS — 33,589 — 33,589 Total trading securities — 263,363 — 263,363 Equity securities 185,214 8,284 — 193,498 Short-term investments U.S. government and agency securities 84,823 — — 84,823 State and municipal obligations — 12,470 — 12,470 Money market instruments 331,280 — — 331,280 Corporate bonds and notes — 33,080 — 33,080 CMBS — 4,748 — 4,748 Other ABS — 28 — 28 Other investments (2) — 151,086 — 151,086 Total short-term investments 416,103 201,412 — 617,515 Other invested assets (3) — — 3,000 3,000 Total investments at fair value (3) 826,857 5,827,731 3,000 6,657,588 Other Embedded derivatives (4) — — 5,499 5,499 Loaned securities (5) U.S. government and agency securities 19,830 — — 19,830 Corporate bonds and notes — 86,480 — 86,480 Equity securities 28,748 — — 28,748 Total assets at fair value (3) $ 875,435 $ 5,914,211 $ 8,499 $ 6,798,145 (1) Comprises the notes purchased by Radian Group in connection with the Excess-of-Loss Program. See Note 8 for more information about our reinsurance programs. (2) Comprising short-term certificates of deposit and commercial paper. (3) Does not include other invested assets of $0.9 million that are primarily invested in limited partnership investments valued using the net asset value as a practical expedient. (4) Embedded derivatives related to our Excess-of-Loss Program are classified as other assets in our consolidated balance sheets. See Note 8 for more information about our reinsurance programs. (5) Securities loaned to third-party borrowers under securities lending agreements are classified as other assets in our condensed consolidated balance sheets. See Note 6 for more information. Assets carried at fair value by hierarchy level December 31, 2020 (In thousands) Level I Level II Level III Total Investments Fixed-maturities available for sale U.S. government and agency securities $ 140,034 $ 29,189 $ — $ 169,223 State and municipal obligations — 165,271 — 165,271 Corporate bonds and notes — 3,047,189 — 3,047,189 RMBS — 833,939 — 833,939 CMBS — 681,265 — 681,265 CLO — 568,558 — 568,558 Other ABS — 252,457 — 252,457 Foreign government and agency securities — 5,438 — 5,438 Total fixed-maturities available for sale 140,034 5,583,306 — 5,723,340 Trading securities State and municipal obligations — 120,449 — 120,449 Corporate bonds and notes — 123,142 — 123,142 RMBS — 13,000 — 13,000 CMBS — 34,294 — 34,294 Total trading securities — 290,885 — 290,885 Equity securities 142,761 8,479 — 151,240 Short-term investments State and municipal obligations — 21,819 — 21,819 Money market instruments 268,900 — — 268,900 Corporate bonds and notes — 30,495 — 30,495 Other ABS — 219 — 219 Other investments (1) — 296,571 — 296,571 Total short-term investments 268,900 349,104 — 618,004 Other invested assets (2) — — 3,000 3,000 Total investments at fair value (2) 551,695 6,231,774 3,000 6,786,469 Other Embedded derivatives (3) — — 5,513 5,513 Loaned securities (4) U.S. government and agency securities 4,876 — — 4,876 Corporate bonds and notes — 31,324 — 31,324 Equity securities 21,299 — — 21,299 Total assets at fair value (2) $ 577,870 $ 6,263,098 $ 8,513 $ 6,849,481 (1) Comprising short-term certificates of deposit and commercial paper. (2) Does not include other invested assets of $2.0 million that are primarily invested in limited partnership investments valued using the net asset value as a practical expedient. (3) Embedded derivatives related to our Excess-of-Loss Program are classified as other assets in our consolidated balance sheets. See Note 8 for more information about our reinsurance programs. (4) Securities loaned to third-party borrowers under securities lending agreements are classified as other assets in our condensed consolidated balance sheets. See Note 6 for more information. There were no transfers to or from Level III for the three and nine months ended September 30, 2021 or the year ended December 31, 2020. Activity related to Level III assets and liabilities (including realized and unrealized gains and losses, purchases, sales, issuances, settlements and transfers) was immaterial for the three and nine months ended September 30, 2021 and the year ended December 31, 2020. Other Fair Value Disclosure The carrying value and estimated fair value of other selected liabilities not carried at fair value in our condensed consolidated balance sheets were as follows as of the dates indicated. Financial liabilities not carried at fair value September 30, 2021 December 31, 2020 (In thousands) Carrying Estimated Carrying Estimated Senior notes $ 1,408,502 $ 1,556,285 $ 1,405,674 $ 1,563,503 FHLB advances 172,649 174,551 176,483 179,578 The fair value of our senior notes is estimated based on quoted market prices. The fair value of our FHLB advances is estimated based on expected cash flows for similar borrowings. These liabilities are categorized in Level II of the fair value hierarchy. See Note 12 for further information about these borrowings.

Note 6 - Investments (Note)

Note 6 - Investments (Note)	9 Months Ended
	Sep. 30, 2021
Investments [Abstract]
Investments	Investments Available for Sale Securities Our available for sale securities within our investment portfolio consisted of the following as of the dates indicated. Available for sale securities September 30, 2021 (In thousands) Amortized Allowance for Credit Losses Gross Gross Fair Value Fixed-maturities available for sale U.S. government and agency securities $ 256,519 $ — $ 523 $ (1,884) $ 255,158 State and municipal obligations 146,234 — 15,134 (357) 161,011 Corporate bonds and notes 2,892,347 — 155,631 (24,981) 3,022,997 RMBS 695,481 — 20,925 (3,300) 713,106 CMBS 680,503 — 28,619 (2,481) 706,641 CLO 558,523 — 1,340 (543) 559,320 Other ABS 193,727 — 1,768 (476) 195,019 Foreign government and agency securities 5,107 — 237 — 5,344 Mortgage insurance-linked notes (1) 45,384 — 2,307 — 47,691 Total securities available for sale, including loaned securities 5,473,825 $ — $ 226,484 $ (34,022) 5,666,287 Less: loaned securities (2) 82,241 86,075 Total fixed-maturities available for sale $ 5,391,584 $ 5,580,212 (1) Comprises the notes purchased by Radian Group in connection with the Excess-of-Loss Program. See Note 8 for more information about our reinsurance programs. (2) Included in other assets in our consolidated balance sheet as further described below. See below for a discussion of our securities lending agreements. Available for sale securities December 31, 2020 (In thousands) Amortized Allowance for Credit Losses Gross Gross Fair Value Fixed-maturities available for sale U.S. government and agency securities $ 176,033 $ — $ 1,677 $ (3,611) $ 174,099 State and municipal obligations 149,258 — 16,113 (100) 165,271 Corporate bonds and notes 2,832,350 (948) 250,771 (3,758) 3,078,415 RMBS 799,814 — 34,439 (314) 833,939 CMBS 645,071 — 39,495 (3,301) 681,265 CLO 569,173 — 2,026 (2,641) 568,558 Other ABS 249,988 — 2,901 (432) 252,457 Foreign government and agency securities 5,100 — 338 — 5,438 Total securities available for sale, including loaned securities 5,426,787 $ (948) $ 347,760 $ (14,157) 5,759,442 Less: loaned securities (1) 33,164 36,102 Total fixed-maturities available for sale $ 5,393,623 $ 5,723,340 (1) Included in other assets in our consolidated balance sheet as further described below. See below for a discussion of our securities lending agreements. The following table provides a rollforward of the allowance for credit losses on fixed-maturities available for sale, which relates entirely to corporate bonds and notes for the periods indicated. Rollforward of allowance for credit losses on fixed-maturities available for sale Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Beginning balance $ — $ 2,476 $ 948 $ — Current provision for securities without prior allowance — — — 2,596 Net increases (decreases) in allowance on previously impaired securities — (186) (918) — Reduction for securities sold — — (30) (306) Ending balance $ — $ 2,290 $ — $ 2,290 Gross Unrealized Losses and Related Fair Value of Available for Sale Securities For securities deemed “available for sale” that are in an unrealized loss position and for which an allowance for credit loss has not been established, the following tables show the gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of the dates indicated. Included in the amounts as of September 30, 2021 and December 31, 2020 are loaned securities under securities lending agreements that are classified as other assets in our condensed consolidated balance sheets, as further described below. Unrealized losses on fixed-maturities available for sale by category and length of time September 30, 2021 ($ in thousands) Less Than 12 Months 12 Months or Greater Total Description of Securities # of Fair Value Unrealized # of Fair Value Unrealized # of Fair Value Unrealized U.S. government and agency securities 14 $ 175,339 $ (1,207) 2 $ 9,477 $ (677) 16 $ 184,816 $ (1,884) State and municipal obligations 15 20,223 (254) 1 2,831 (103) 16 23,054 (357) Corporate bonds and notes 175 719,649 (16,424) 32 90,207 (8,557) 207 809,856 (24,981) RMBS 36 258,829 (3,291) 2 758 (9) 38 259,587 (3,300) CMBS 59 118,990 (1,555) 12 25,224 (926) 71 144,214 (2,481) CLO 68 251,734 (287) 14 55,150 (256) 82 306,884 (543) Other ABS 44 99,325 (453) 2 859 (23) 46 100,184 (476) Total 411 $ 1,644,089 $ (23,471) 65 $ 184,506 $ (10,551) 476 $ 1,828,595 $ (34,022) December 31, 2020 ($ in thousands) Less Than 12 Months 12 Months or Greater Total Description of Securities # of Fair Value Unrealized # of Fair Value Unrealized # of Fair Value Unrealized U.S. government and agency securities 4 $ 90,591 $ (3,611) — $ — $ — 4 $ 90,591 $ (3,611) State and municipal obligations 4 9,626 (100) — — — 4 9,626 (100) Corporate bonds and notes 60 174,848 (3,758) — — — 60 174,848 (3,758) RMBS 5 42,003 (305) 2 915 (9) 7 42,918 (314) CMBS 43 118,345 (3,035) 6 8,312 (266) 49 126,657 (3,301) CLO 52 173,459 (970) 25 137,506 (1,671) 77 310,965 (2,641) Other ABS 26 70,759 (322) 3 12,119 (110) 29 82,878 (432) Total 194 $ 679,631 $ (12,101) 36 $ 158,852 $ (2,056) 230 $ 838,483 $ (14,157) See “—Net Gains (Losses) on Investments” below for additional details on our net gains (losses) on investments, including the changes in the allowance for credit losses on fixed maturities available for sale and other impairments due to our intent to sell securities in an unrealized loss position. See Note 2 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for information regarding our accounting policy for impairments. Securities Lending Agreements We participate in a securities lending program whereby we loan certain securities in our investment portfolio to third-party borrowers for short periods of time. Although we report such securities at fair value within other assets in our condensed consolidated balance sheets, rather than within investments, the detailed information we provide in this Note 6 includes these securities. See Note 5 for additional detail on the loaned securities, and see Note 6 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for additional information about our accounting policies with respect to our securities lending agreements and the collateral requirements thereunder. All of our securities lending agreements are classified as overnight and revolving. Securities collateral on deposit with us from third-party borrowers totaling $97.4 million and $43.3 million as of September 30, 2021 and December 31, 2020, respectively, may not be transferred or re-pledged unless the third-party borrower is in default, and is therefore not reflected in our condensed consolidated financial statements. Net Gains (Losses) on Investments Net gains (losses) on investments consisted of the following. Net gains (losses) on investments Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Net realized gains (losses) Fixed-maturities available for sale (1) $ 4,098 $ 13,777 $ 5,684 $ 31,998 Trading securities — — 391 4 Equity securities 8,632 — 8,405 361 Other investments 1,516 196 3,850 273 Net realized gains (losses) on investments 14,246 13,973 18,330 32,636 Impairment losses due to intent to sell — — — (1,401) Net decrease (increase) in expected credit losses — 186 918 (2,596) Net unrealized gains (losses) on investments (11,342) 2,813 (5,825) 916 Total net gains (losses) on investments $ 2,904 $ 16,972 $ 13,423 $ 29,555 (1) Components of net realized gains (losses) on fixed-maturities available for sale include the following. Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Gross investment gains from sales and redemptions $ 5,874 $ 14,219 $ 19,588 $ 34,422 Gross investment losses from sales and redemptions (1,776) (442) (13,904) (2,424) The net changes in unrealized gains (losses) recognized in earnings on investments that were still held at each period-end were as follows. Net changes in unrealized gains (losses) on investments still held Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Net unrealized gains (losses) on investments still held Trading securities $ (2,659) $ (1,150) $ (6,011) $ 9,990 Equity securities (1,086) 4,455 6,251 (8,158) Other investments (13) (173) 1,050 152 Net unrealized gains (losses) on investments still held $ (3,758) $ 3,132 $ 1,290 $ 1,984 Contractual Maturities The contractual maturities of fixed-maturities available for sale were as follows. Contractual maturities of fixed-maturities available for sale September 30, 2021 Available for Sale (In thousands) Amortized Fair Due in one year or less $ 194,384 $ 195,823 Due after one year through five years (1) 1,113,491 1,159,751 Due after five years through 10 years (1) 1,222,598 1,276,635 Due after 10 years (1) 769,734 812,301 Asset-backed and mortgage-backed securities (2) 2,173,618 2,221,777 Total 5,473,825 5,666,287 Less: loaned securities 82,241 86,075 Total fixed-maturities available for sale $ 5,391,584 $ 5,580,212 (1) Actual maturities may differ as a result of calls before scheduled maturity. (2) Includes RMBS, CMBS, CLO, Other ABS and mortgage insurance-linked notes, which are not due at a single maturity date. Other For the three and nine months ended September 30, 2021, we did not transfer any securities to or from the available for sale or trading categories. Our fixed-maturities available for sale include securities totaling $18.2 million and $16.9 million at September 30, 2021 and December 31, 2020, respectively, on deposit and serving as collateral with various state regulatory authorities. Our fixed-maturities available for sale also include securities serving as collateral for our FHLB advances. See Note 12 for additional information about our FHLB advances.

Note 7 - Goodwill and Other Acq

Note 7 - Goodwill and Other Acquired Intangible Assets, Net (Note)	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets, Net	Goodwill and Other Acquired Intangible Assets, Net All of our goodwill and other acquired intangible assets relate to our homegenius segment. There was no change to our goodwill balance of $9.8 million during the three and nine months ended September 30, 2021. The following is a summary of the gross and net carrying amounts and accumulated amortization (including impairment) of our other acquired intangible assets as of the periods indicated. Other acquired intangible assets September 30, 2021 December 31, 2020 (In thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Client relationships $ 43,550 $ (33,855) $ 9,695 $ 43,550 $ (31,559) $ 11,991 Technology 8,285 (7,599) 686 8,285 (7,370) 915 Licenses 463 (190) 273 463 (128) 335 Total $ 52,298 $ (41,644) $ 10,654 $ 52,298 $ (39,057) $ 13,241 For additional information on our accounting policies for goodwill and other acquired intangible assets, see Notes 2 and 7 of Notes to Consolidated Financial Statements in our 2020 Form 10-K.

Note 8 - Reinsurance (Note)

Note 8 - Reinsurance (Note)	9 Months Ended
	Sep. 30, 2021
Reinsurance Disclosures [Abstract]
Reinsurance	Reinsurance In our mortgage insurance and title insurance businesses, we use reinsurance as part of our risk distribution strategy, including to manage our capital position and risk profile. The reinsurance arrangements for our mortgage insurance business include p remiums ceded under the QSR Program, the Single Premium QSR Program and the Excess-of-Loss Program. The amount of credit that we receive under the PMIERs financial requirements for our third-party reinsurance transactions is subject to ongoing review and approval by the GSEs. The effect of all of our reinsurance programs on our net income is as follows. Reinsurance impacts on net premiums written and earned Net Premiums Written Net Premiums Earned Three Months Ended Nine Months Ended Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 2021 2020 2021 2020 Direct Mortgage insurance $ 240,669 $ 266,067 $ 734,993 $ 812,806 $ 265,378 $ 325,556 $ 835,462 $ 937,827 Title insurance 12,570 3,173 27,714 7,461 12,570 3,173 27,714 7,461 Total direct 253,239 269,240 762,707 820,267 277,948 328,729 863,176 945,288 Assumed (1) Mortgage insurance 1,683 2,942 5,596 9,585 1,683 2,946 5,596 9,599 Ceded (2) Mortgage insurance (14,236) (9,731) (34,572) (72,681) (30,194) (45,146) (92,441) (141,475) Title insurance (319) (58) (585) (231) (319) (58) (585) (231) Total ceded (14,555) (9,789) (35,157) (72,912) (30,513) (45,204) (93,026) (141,706) Total Net premiums $ 240,367 $ 262,393 $ 733,146 $ 756,940 $ 249,118 $ 286,471 $ 775,746 $ 813,181 (1) Primarily includes premiums from our participation in certain credit risk transfer programs. (2) Net of profit commission, which is impacted by the level of ceded losses recoverable, if any, on reinsurance transactions. See Note 11 for additional information on our reserve for losses and reinsurance recoverables. Other reinsurance impacts Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Ceding commissions earned (1) $ 7,120 $ 17,038 $ 25,446 $ 40,457 Ceded losses (2) 795 10,189 3,463 51,786 (1) Ceding commissions earned are primarily related to mortgage insurance and are included as an offset to expenses primarily in other operating expenses on our condensed consolidated statements of operations. Deferred ceding commissions of $40.7 million and $52.5 million are included in other liabilities on our condensed consolidated balance sheets at September 30, 2021 and December 31, 2020, respectively. (2) Primarily all related to mortgage insurance. Single Premium QSR Program Radian Guaranty entered into each of the 2016 Single Premium QSR Agreement, 2018 Single Premium QSR Agreement and 2020 Single Premium QSR Agreement with panels of third-party reinsurers to cede a contractual quota share percent of our Single Premium NIW as of the effective date of each agreement (as set forth in the table below), subject to certain conditions. Radian Guaranty receives a ceding commission for ceded premiums written pursuant to these transactions. Radian Guaranty also receives a profit commission annually, provided that the loss ratio on the loans covered under the agreement generally remains below the applicable prescribed thresholds. Losses on the ceded risk up to this level reduce Radian Guaranty’s profit commission on a dollar-for-dollar basis. Each of the agreements is subject to a scheduled termination date as set forth in the table below; however, Radian Guaranty has the option, based on certain conditions and subject to a termination fee, to terminate any of the agreements at the end of any calendar quarter on or after the applicable optional termination date. If Radian Guaranty exercises this option in the future, it would result in Radian Guaranty reassuming the related RIF in exchange for a net payment to the reinsurer calculated in accordance with the terms of the applicable agreement. Radian Guaranty also may terminate any of the agreements prior to the applicable scheduled termination date under certain circumstances, including if one or both of the GSEs no longer grant full PMIERs capital relief for the reinsurance. The 2020 Single Premium QSR Agreement is the only QSR agreement under which Radian Guaranty is currently ceding NIW. Under the 2020 Single Premium QSR Agreement, NIW for Single Premium Policies issued between January 1, 2020 and December 31, 2021 is being ceded, subject to certain conditions and a limitation on ceded premiums written of $250 million. The parties may mutually agree to increase the amount of ceded risk above this level. The following table sets forth additional details regarding the Single Premium QSR Program. Single Premium QSR Program 2020 Singles QSR 2018 Singles QSR 2016 Singles QSR NIW Policy Dates Jan 1, 2020-Dec 31, 2021 Jan 1, 2018-Dec 31, 2019 Jan 1, 2012-Dec 31, 2017 Effective Date January 1, 2020 January 1, 2018 January 1, 2016 Scheduled Termination Date December 31, 2031 December 31, 2029 December 31, 2027 Optional Termination Date January 1, 2024 January 1, 2022 January 1, 2020 Quota Share % 65% 65% 20% - 65% (1) Ceding Commission % 25% 25% 25% Profit Commission % Up to 56% Up to 56% Up to 55% (In millions) As of September 30, 2021 RIF Ceded $ 2,046 $ 1,279 $ 2,115 (In millions) As of December 31, 2020 RIF Ceded $ 1,597 $ 1,979 $ 3,071 (1) Effective December 31, 2017, we amended the 2016 Single Premium QSR Agreement to increase the amount of ceded risk on performing loans under the agreement from 35% to 65% for the 2015 through 2017 vintages. Loans included in the 2012 through 2014 vintages, and any other loans subject to the agreement that were delinquent at the time of the amendment, were unaffected by the change and therefore the amount of ceded risk for those loans continues to range from 20% to 35%. Excess-of-Loss Program As of September 30, 2021, Radian Guaranty had entered into five fully collateralized reinsurance arrangements with the Eagle Re Issuers. For the respective coverage periods, Radian Guaranty retains the first-loss layer of aggregate losses, as well as any losses in excess of the outstanding reinsurance coverage amounts. The Eagle Re Issuers provide second layer coverage up to the outstanding coverage amounts. For each of these five reinsurance arrangements, the Eagle Re Issuers financed their coverage by issuing mortgage insurance-linked notes to eligible capital markets investors in unregistered private offerings. The aggregate excess-of-loss reinsurance coverage for these arrangements decreases over a 10-year period as the principal balances of the underlying covered mortgages decrease and as any claims are paid by the applicable Eagle Re Issuer or the mortgage insurance is canceled. Radian Guaranty has rights to terminate the reinsurance agreements upon the occurrence of certain events. Under each of the reinsurance agreements, the outstanding reinsurance coverage amount will begin amortizing after an initial period in which a target level of credit enhancement is obtained and will stop amortizing if certain thresholds, or triggers, are reached, including a delinquency trigger event based on an elevated level of delinquencies as defined in the related insurance-linked notes transaction agreements. With the exception of insurance-linked notes issued by Eagle Re 2020-2 Ltd and Eagle Re 2021-1 Ltd., the insurance-linked notes issued by the Eagle Re Issuers in connection with our Excess-of-Loss Program are currently subject to a delinquency trigger event, which was first reported to the insurance-linked note investors on June 25, 2020. For the insurance-linked notes that are subject to a delinquency trigger event, both the amortization of the outstanding reinsurance coverage amount pursuant to our reinsurance arrangements with the Eagle Re Issuers and the amortization of the principal amount of the related insurance-linked notes issued by the Eagle Re Issuers have been suspended and will continue to be suspended during the pendency of the trigger event. The following table sets forth additional details regarding the Excess-of-Loss Program as of September 30, 2021. Excess-of-Loss Program (In millions) Eagle Re Eagle Re Eagle Re Eagle Re Eagle Re Issued April 2021 October 2020 February 2020 April 2019 November 2018 NIW Policy Dates Aug 1, 2020- Oct 1, 2019- Jan 1, 2019- Jan 1, 2018- Jan 1, 2017- Initial RIF $ 11,061 $ 13,011 $ 9,866 $ 10,705 $ 9,109 Initial Coverage 498 (1) 390 488 562 434 (2) Initial First Layer Retention 221 423 202 268 205 (In millions) As of September 30, 2021 RIF $ 9,999 $ 8,451 $ 3,727 $ 2,787 $ 2,415 Remaining Coverage 498 206 488 385 276 (2) First Layer Retention 221 423 202 264 201 (In millions) As of December 31, 2020 RIF $ — $ 11,748 $ 6,121 $ 4,657 $ 3,986 Remaining Coverage — 390 488 385 276 (2) First Layer Retention — 423 202 265 201 (1) Radian Group purchased $45.4 million original principal amount of these mortgage insurance-linked notes, which are included in fixed-maturities available for sale on our condensed consolidated balance sheet at September 30, 2021. See Notes 5 and 6 for additional information. (2) Excludes a separate excess-of-loss reinsurance agreement entered into by Radian Guaranty with both initial and remaining coverage of $21.4 million. The Eagle Re Issuers are not subsidiaries or affiliates of Radian Guaranty. Based on the accounting guidance that addresses VIEs, we have not consolidated any of the assets and liabilities of the Eagle Re Issuers in our financial statements, because Radian does not have: (i) the power to direct the activities that most significantly affect the Eagle Re Issuers’ economic performances or (ii) the obligation to absorb losses or the right to receive benefits from the Eagle Re Issuers that potentially could be significant to the Eagle Re Issuers. See Note 2 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for more information on our accounting treatment of VIEs. The reinsurance premium due to the Eagle Re Issuers is calculated by multiplying the outstanding reinsurance coverage amount at the beginning of a period by a coupon rate, which is the sum of one-month LIBOR (or an acceptable alternative to LIBOR) or SOFR, as applicable, plus a contractual risk margin, and then subtracting actual investment income collected on the assets in the reinsurance trust during the preceding month. As a result, the premiums we pay will vary based on: (i) the spread between LIBOR (or an acceptable alternative to LIBOR) or SOFR, as provided in each applicable reinsurance agreement, and the rates on the investments held by the reinsurance trust and (ii) the outstanding amount of reinsurance coverage. As the reinsurance premium will vary based on changes in these rates, we concluded that the reinsurance agreements contain embedded derivatives, which we have accounted for separately as freestanding derivatives and recorded in other assets or other liabilities on our condensed consolidated balance sheets. Changes in the fair value of these embedded derivatives are recorded in net gains (losses) on investments and other financial instruments in our condensed consolidated statements of operations. See Note 5 herein and Note 5 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for more information on our fair value measurements of financial instruments, including our embedded derivatives. In the event an Eagle Re Issuer is unable to meet its future obligations to us, if any, our insurance subsidiaries would be liable to make claims payments to our policyholders. In the event that all of the assets in the reinsurance trust (consisting of U.S. government money market funds, cash or U.S. Treasury securities) have become worthless and the Eagle Re Issuer is unable to make its payments to us, our maximum potential loss would be the amount of mortgage insurance claim payments for losses on the insured policies, net of the aggregate reinsurance payments already received, up to the full aggregate excess-of-loss reinsurance coverage amount. In the same scenario, the related embedded derivative would no longer have value. The Eagle Re Issuers represent our only VIEs as of September 30, 2021 and December 31, 2020. The following table presents the total assets and liabilities of the Eagle Re Issuers as of the dates indicated. Total assets and liabilities of Eagle Re Issuers (1) (In thousands) September 30, December 31, Eagle Re 2021-1 Ltd. $ 497,735 $ — Eagle Re 2020-2 Ltd. 205,581 390,324 Eagle Re 2020-1 Ltd. 488,385 488,385 Eagle Re 2019-1 Ltd. 384,602 384,602 Eagle Re 2018-1 Ltd. 275,718 275,718 Total $ 1,852,021 $ 1,539,029 (1) Assets held by the Eagle Re Issuers are required to be invested in U.S. government money market funds, cash or U.S. Treasury securities. Liabilities of the Eagle Re Issuers consist of their mortgage insurance-linked notes, described above. Assets and liabilities are equal to each other for each of the Eagle Re Issuers. Other Collateral Although we use reinsurance as one of our risk management tools, reinsurance does not relieve us of our obligations to our policyholders. In the event the reinsurers are unable to meet their obligations to us, our insurance subsidiaries would be liable for any defaulted amounts. However, consistent with the PMIERs reinsurer counterparty collateral requirements, Radian Guaranty’s reinsurers have established trusts to help secure our potential cash r ecoveries. In addition to the total VIE assets of the Eagle Re Issuers discussed above, the amount held in reinsurance trusts was $172.6 million as of September 30, 2021, compared to $228.6 million as of December 31, 2020. In addition, for the Single Premium QSR Program, Radian Guaranty holds amounts related to ceded premiums written to collateralize the reinsurers’ obligations, which is reported in reinsurance funds withheld on our condensed consolidated balance sheets. Any loss recoveries and profit commissions paid to Radian Guaranty related to the Single Premium QSR Program are expected to be realized from this account. See Note 8 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for more information about our reinsurance transactions.

Note 9 - Other Assets (Note)

Note 9 - Other Assets (Note)	9 Months Ended
	Sep. 30, 2021
Other Assets [Abstract]
Other Assets	Other Assets The following table shows the components of other assets as of the dates indicated. Other assets (In thousands) September 30, December 31, Prepaid federal income taxes (Note 10) $ 313,123 $ 210,889 Prepaid reinsurance premiums (1) 209,769 267,638 Loaned securities (Note 5) 135,058 57,499 Company-owned life insurance (2) 112,503 115,586 Right-of-use assets (Note 13) 32,690 32,985 Other 35,918 30,488 Total other assets $ 839,061 $ 715,085 (1) Relates primarily to our Single Premium QSR Program. (2) We are the beneficiary of insurance policies on the lives of certain of our current and past officers and employees. The balances reported in other assets reflect the amounts that could be realized upon surrender of the insurance policies as of each respective date. Right-of-Use Assets We assess our various asset groups, which include right-of-use assets, for changes in grouping and for potential impairment when certain events occur or when there are changes in circumstances, including potential alternative uses. If circumstances require a change in asset groupings or a right-of-use asset to be tested for possible impairment, and the carrying value of the right-of-use asset is not recoverable on an undiscounted cash flow basis, an impairment is recognized to the extent that the carrying value exceeds its fair value. During the second quarter of 2021, in response to the COVID-19 pandemic and Radian’s successful transition to a virtual work environment, we made the decision to exit, and to actively market for sublease, all office space in our former corporate headquarters in Philadelphia. As part of this change, we also entered into a new lease with reduced square footage at another Philadelphia area location, which we designated as our new corporate headquarters location effective September 2021. As a result, during the three months ended June 30, 2021, we recognized an impairment of $3.5 million related to our former corporate headquarter leases, reducing the carrying value of certain lease assets and the related property and equipment to its estimated fair value. The right-of-use asset fair value was estimated using an income approach based on forecasted future cash flows expected to be derived from the property based on current sublease market rent, which could differ from actual results and require us to revise our initial estimates. Following this impairment, which was recorded within other operating expenses in our condensed consolidated statement of operations, the aggregate carrying value of the right-of-use assets and leasehold improvements related to the former corporate headquarter leases that we plan to sublease was $27.4 million as of September 30, 2021.

Note 10 - Income Taxes (Note)

Note 10 - Income Taxes (Note)	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes As of September 30, 2021 and December 31, 2020, our current income tax liability was $25.2 million and $17.5 million, respectively, and is included as a component of other liabilities in our condensed consolidated balance sheets. Certain entities within our consolidated group have generated deferred tax assets relating primarily to state and local NOL carryforwards, which, if unutilized, will expire during various future tax periods. We are required to establish a valuation allowance against our deferred tax assets when it is more likely than not that all or some portion of our deferred tax assets will not be realized. At each balance sheet date, we assess our need for a valuation allowance and this assessment is based on all available evidence, both positive and negative. This requires management to exercise judgment and make assumptions regarding whether our deferred tax assets will be realized in future periods. We have determined that certain entities within Radian Group may continue to generate taxable losses on a separate company basis in the near term and may not be able to fully utilize certain of their state and local NOLs on their state and local tax returns. Therefore, with respect to deferred tax assets relating to these state and local NOLs and other state timing adjustments, we retained a valuation allowance of $84.7 million at September 30, 2021. As a mortgage guaranty insurer, we are eligible for a tax deduction, subject to certain limitations, under Internal Revenue Code Section 832(e) for amounts required by state law or regulation to be set aside in statutory contingency reserves. The deduction is allowed only to the extent that, in conjunction with quarterly federal tax payment due dates, we purchase non-interest bearing U.S. Mortgage Guaranty Tax and Loss Bonds issued by the U.S. Department of the Treasury in an amount equal to the tax benefit derived from deducting any portion of our statutory contingency reserves. As of September 30, 2021 and December 31, 2020, we held $313.1 million and $210.9 million of these bonds, respectively, which are included as prepaid federal income taxes within other assets in our condensed consolidated balance sheets. The corresponding deduction of our statutory contingency reserves resulted in the recognition of a net deferred tax liability. See Note 16 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for additional information about our U.S. Mortgage Guaranty Tax and Loss Bonds. For additional information on our income taxes, including our accounting policies, see Notes 2 and 10 of Notes to Consolidated Financial Statements in our 2020 Form 10-K.

Note 11 - Losses and LAE (Note)

Note 11 - Losses and LAE (Note)	9 Months Ended
	Sep. 30, 2021
Insurance Loss Reserves [Abstract]
Losses and Loss Adjustment Expense	Losses and LAE Our reserve for losses and LAE, at the end of each period indicated, consisted of the following. Reserve for losses and LAE (In thousands) September 30, December 31, Mortgage insurance loss reserves (1) $ 888,021 $ 844,107 Title insurance loss reserves 5,134 4,306 Total reserve for losses and LAE $ 893,155 $ 848,413 (1) Primarily comprises first lien primary case reserves of $851.2 million and $799.5 million at September 30, 2021 and December 31, 2020, respectively. For the periods indicated, 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. Rollforward of mortgage insurance reserve for losses Nine Months Ended (In thousands) 2021 2020 Balance at beginning of period $ 844,107 $ 401,273 Less: Reinsurance recoverables (1) 71,769 14,594 Balance at beginning of period, net of reinsurance recoverables 772,338 386,679 Add: Losses and LAE incurred in respect of default notices reported and unreported in: Current year (2) 119,823 448,584 Prior years (53,947) (21,494) Total incurred 65,876 427,090 Deduct: Paid claims and LAE related to: Current year (2) 499 2,841 Prior years 24,431 54,167 Total paid 24,930 57,008 Balance at end of period, net of reinsurance recoverables 813,284 756,761 Add: Reinsurance recoverables (1) 74,737 64,947 Balance at end of period $ 888,021 $ 821,708 (1) Related to ceded losses recoverable, if any, on reinsurance transactions. See Note 8 for additional information. (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. Reserve Activity Incurred Losses Case reserves established for new default notices were the primary driver of our total incurred losses for the nine months ended September 30, 2021 and 2020, and they were primarily impacted by the number of new primary default notices received in the period and our related gross Default to Claim Rate assumption applied to those new defaults. For the nine months ended September 30, 2021, we experienced a 70% decrease in the number of new primary default notices, compared to the nine months ended September 30, 2020, substantially all of which related to defaults subject to forbearance programs implemented in response to the COVID-19 pandemic. Our gross Default to Claim Rate assumption applied to new defaults was 8.0% as of September 30, 2021, compared to 8.5% as of September 30, 2020. This combination of fewer new default notices and a lower Default to Claim Rate assumption on new defaults was the primary driver of the decrease in losses incurred related to current year defaults for the nine months ended September 30, 2021, as compared to the first nine months of 2020. Our provision for losses during the first nine months of 2021 was positively impacted by favorable reserve development on prior year defaults, primarily as a result of more favorable trends in Cures than originally estimated, which resulted in, among other changes, a reduction from 8.5% to 8.0% in our Default to Claim Rate assumption for prior year default notices reported between April and December 2020 that was recorded as a change to our provision for losses during the second quarter of 2021. Our provision for losses during the first nine months of 2020 was also positively impacted by favorable reserve development on prior year defaults. The favorable development in 2020 was primarily driven by a reduction in certain Default to Claim Rate assumptions for those prior year defaults based on observed trends. During the third quarter of 2021, Hurricane Ida caused extensive property damage to areas of Louisiana, New York, New Jersey and Pennsylvania, as well as other general disruptions including power outages and flooding. Although the Primary Mortgage Insurance we write protects lenders from a portion of losses resulting from mortgage defaults, it generally does not provide protection against property loss or physical damage, including damage caused by hurricanes or other severe weather events or natural disasters. As of September 30, 2021, we do not expect to incur any material losses due to current or future defaults in FEMA Designated Areas related to Hurricane Ida. However, the future impact to our reserves or PMIERs Cushion may be affected by various factors, including the pace of economic recovery in the FEMA Designated Areas. See Note 1 for additional information on the elevated risks and uncertainties resulting from the COVID-19 pandemic to our business. Claims Paid Total claims paid decreased for the nine months ended September 30, 2021 compared to the same period in 2020. The decrease in claims paid is primarily attributable to COVID-19-related hardship forbearance plans and suspensions of foreclosures and evictions. Claims paid in 2021 include payments made to settle certain previously disclosed legal proceedings. See Note 13 for additional information about these legal proceedings. For additional information about our Reserve for Losses and LAE, including our accounting policies, see Notes 2 and 11 of Notes to Consolidated Financial Statements in our 2020 Form 10-K.

Note 12 - Borrowings and Financ

Note 12 - Borrowings and Financing Activities (Note)	9 Months Ended
	Sep. 30, 2021
Senior Notes [Abstract]
Borrowings and Financing Activities	Borrowings and Financing Activities The carrying value of our debt at September 30, 2021 and December 31, 2020 was as follows. Borrowings (In thousands) September 30, December 31, Senior notes Senior Notes due 2024 $ 446,346 $ 445,512 Senior Notes due 2025 517,950 516,634 Senior Notes due 2027 444,206 443,528 Total senior notes $ 1,408,502 $ 1,405,674 FHLB advances FHLB advances due 2021 $ 31,667 $ 67,500 FHLB advances due 2022 61,050 61,050 FHLB advances due 2023 52,994 27,995 FHLB advances due 2024 13,954 9,954 FHLB advances due 2025 9,984 9,984 FHLB advances due 2027 3,000 — Total FHLB advances $ 172,649 $ 176,483 FHLB Advances As of September 30, 2021, we had $172.6 million of fixed-rate advances outstanding with a weighted average interest rate of 0.87%. Interest on the FHLB advances is payable quarterly, or at maturity if the term of the advance is less than 90 days. Principal is due at maturity. For obligations with maturities greater than or equal to 90 days, we may prepay the debt at any time, subject to a prepayment fee calculation. The principal balance of the FHLB advances are required to be collateralized by eligible assets with a market value that must be maintained generally within a minimum range of 103% to 114% of the amount borrowed, depending on the type of assets pledged. Our fixed-maturities available for sale and trading securities include securities totaling $199.5 million and $188.0 million at September 30, 2021 and December 31, 2020, respectively, which serve as collateral for our FHLB advances to satisfy this requirement. See Note 12 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for additional information about our FHLB advances. Revolving Credit Facility Radian Group has in place a $267.5 million unsecured revolving credit facility with a syndicate of bank lenders, which has a maturity date of January 18, 2022. At September 30, 2021, Radian Group was in compliance with all of the credit facility covenants, and there were no amounts outstanding. For more information regarding our revolving credit facility, including certain of its terms and covenants, see Note 12 of Notes to Consolidated Financial Statements in our 2020 Form 10-K.

Note 13 - Commitments and Conti

Note 13 - Commitments and Contingencies (Note)	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings We are routinely involved in a number of legal actions and proceedings, including litigation and other disputes arising in the ordinary course of our business. Legal and regulatory matters such as those discussed below and in our 2020 Form 10-K could result in adverse judgments, settlements, fines, injunctions, restitutions or other relief that could require significant expenditures or have other effects on our business. Management believes, based on current knowledge and after consultation with counsel, that the outcome of any currently pending or threatened actions will not have a material adverse effect on our consolidated financial condition. The outcome of litigation and other legal and regulatory matters and proceedings is inherently uncertain, and it is possible that one or more of the matters currently pending or threatened could have an adverse effect on our liquidity, financial condition or results of operations for any particular period. On August 31, 2018, Nationstar Mortgage LLC d/b/a Mr. Cooper (“Nationstar”) filed a complaint in the U.S. District Court for the Eastern District of Pennsylvania against Radian Guaranty related to certain insurance coverage and premium refund decisions made by Radian Guaranty. Effective June 26, 2020, Radian Guaranty and Nationstar entered into a Confidential Settlement Agreement and Release (the “Nationstar Settlement”) to fully resolve, among other things, all claims and counterclaims in this litigation. Implementation of the Nationstar Settlement, which was subject to the condition precedent that the GSEs consent to the Nationstar Settlement, became effective on March 1, 2021, and the litigation was subsequently dismissed with prejudice. Pursuant to the Nationstar Settlement, among other things: (i) Radian made a cash settlement payment to Nationstar on March 5, 2021 and (ii) each party agreed to release the other with respect to all known or unknown claims with respect to the certificates subject to this litigation as well as with respect to all other certificates issued under certain policies on loans serviced by Nationstar for which Radian decided claims prior to January 1, 2019. See Note 13 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for additional background on this matter. The implementation of the Nationstar Settlement did not have a material impact on our mortgage insurance reserves for this proceeding. We also are periodically subject to reviews and audits, as well as inquiries, information-gathering requests and investigations, by regulatory entities. In connection with these matters, from time to time we receive requests and subpoenas seeking information and documents related to aspects of our business. Our Master Policies establish the timeline within which any suit or action arising from any right of an insured under the policy generally must be commenced. In general, any suit or action arising from any right of an insured under the policy must be commenced within two years after such right first arose for primary insurance and within three years for certain other policies, including certain Pool Mortgage Insurance policies. Although we believe that our Loss Mitigation Activities are justified under our policies, from time to time we face challenges from certain lender and servicer customers regarding our Loss Mitigation Activities. These challenges could result in additional arbitration or judicial proceedings and we may need to reassume the risk on, and increase loss reserves for, the associated policies or pay additional claims. The legal and regulatory matters discussed above could result in adverse judgments, settlements, fines, injunctions, restitutions or other relief that could require significant expenditures or have other effects on our business in excess of amounts we have established as reserves for such matters. Lease Liability Our lease liability represents the present value of future lease payments over the lease term. Our operating lease liability was $54.3 million and $53.4 million as of September 30, 2021 and December 31, 2020, respectively, and is classified in other liabilities in our condensed consolidated balance sheets. See Note 9 for additional information on our operating lease right-of-use assets, including an impairment recognized in the second quarter of 2021 related to a decision to sublease the office space in our former corporate headquarters.

Note 14 - Capital Stock (Note)

Note 14 - Capital Stock (Note)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	Capital Stock Share Repurchase Activity On August 14, 2019, Radian Group’s board of directors approved a share repurchase program authorizing the Company to spend up to $200 million, excluding commissions, to repurchase Radian Group common stock in the open market or in privately negotiated transactions, based on market and business conditions, stock price and other factors. Since then, Radian Group’s board of directors has authorized several increases to the program along with extensions of the program’s expiration date. Most recently, in August 2021, Radian Group’s board of directors approved a $200 million increase to this program, bringing the cumulative authorization to repurchase shares up to $675 million, excluding commissions, and extended the expiration of this program to August 31, 2022. Radian operates its share repurchase program pursuant to a trading plan under Rule 10b5-1 of the Exchange Act, which permits the Company to purchase shares, at pre-determined price targets, when it may otherwise be precluded from doing so. During the three and nine months ended September 30, 2021, the Company purchased 7.1 million and 11.4 million shares at an average price of $22.44 and $22.62 per share, respectively, including commissions. As of September 30, 2021, purchase authority of up to $142.0 million remained available under this program. During October, the Company purchased 2.0 million shares of its common stock under its share repurchase program at an average price of $23.72 per share, including commissions. After giving consideration to these repurchases, purchase authority of up to $95.5 million remained available under this program. Other Purchases We may purchase shares on the open market to settle stock options exercised by employees and purchases under the Amended and Restated Radian Group Inc. Employee Stock Purchase Plan. In addition, upon the vesting of certain restricted stock awards under our equity compensation plans, we may withhold from such vested awards shares of our common stock to satisfy the tax liability of the award recipients. Dividends and Dividend Equivalents During the first quarter of 2021 and each quarter of 2020, we declared quarterly cash dividends on our common stock equal to $0.125 per share. On May 4, 2021, Radian Group’s board of directors authorized an increase to the Company’s quarterly dividend from $0.125 to $0.14 per share, beginning with the dividend declared in the second quarter of 2021. Share-Based and Other Compensation Programs During the second quarter of 2021, executive and non-executive officers were granted time-vested and performance-based RSUs to be settled in common stock. The maximum payout of performance-based RSUs at the end of the three-year performance period is 200% of a grantee’s target number of RSUs granted. The vesting of the performance-based RSUs granted to executive and non-executive officers is based upon the cumulative growth in Radian’s book value per share, adjusted for certain defined items, over a three-year performance period. Performance-based RSUs granted to executive officers are subject to a one-year post vesting holding period. The time-vested RSU awards granted to executive and non-executive officers in 2021 generally vest in pro rata installments on each of the first three anniversaries of the grant date. In addition, time-vested RSU awards were also granted to non-employee directors and generally are subject to one-year cliff vesting. See Note 17 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for additional information regarding the Company’s share-based and other compensation programs. Information with regard to RSUs to be settled in stock for periods indicated is as follows. Rollforward of RSUs Performance-Based Time-Vested Number of Shares Weighted-Average Grant Date Fair Value Number of Shares Weighted-Average Grant Date Fair Value Outstanding, December 31, 2020 (1) 2,186,244 $ 15.71 2,118,885 $ 13.16 Granted (2) 578,790 $ 20.39 511,166 $ 21.63 Performance adjustment (3) 421,357 $ — — $ — Vested (4) (811,578) $ 15.98 (456,790) $ 15.95 Forfeited (29,071) $ 18.12 (27,099) $ 17.67 Outstanding, September 30, 2021 (1) 2,345,742 $ 16.76 2,146,162 $ 14.53 (1) Outstanding RSUs represent shares that have not yet been issued because not all conditions necessary to earn the right to benefit from the instruments have been satisfied. The final number of RSUs distributed depends on the cumulative growth in Radian's book value over the respective three-year performance period and, with the exception of certain retirement-eligible employees, continued service through the vesting date, which could result in changes in vested RSUs. (2) For performance-based RSUs, number represents the number of target shares at grant date. (3) For performance-based RSUs, represents the difference between the number of target shares at grant date and the number of shares vested at settlement, which can range from 0 to 200% of target depending on results over the applicable performance periods. (4) Represents amounts vested during the year, including the impact of performance adjustments for performance-based awards.

Note 16 - Statutory Information

Note 16 - Statutory Information (Note)	9 Months Ended
	Sep. 30, 2021
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]
Statutory Information	Statutory Information Our insurance subsidiaries’ statutory net income for the year-to-date periods ended September 30, 2021 and 2020 and statutory policyholders’ surplus as of September 30, 2021 and December 31, 2020 were as follows. Statutory net income Nine Months Ended September 30, (In thousands) 2021 2020 Radian Guaranty $ 516,866 $ 260,175 Radian Reinsurance 8,765 30,358 Other Mortgage Subsidiaries 777 929 Radian Title Insurance 4,777 1,399 Statutory policyholders’ surplus (In thousands) September 30, December 31, Radian Guaranty $ 646,923 $ 481,484 Radian Reinsurance 328,430 360,704 Other Mortgage Subsidiaries 42,715 41,327 Radian Title Insurance 34,342 28,849 State insurance regulations include various capital requirements and dividend restrictions based on our insurance subsidiaries’ statutory financial position and results of operations, as described below. As of September 30, 2021, the amount of restricted net assets held by our consolidated insurance subsidiaries (which represents our equity investment in those insurance subsidiaries) totaled $4.6 billion of our consolidated net assets. In light of Radian Guaranty’s negative unassigned surplus related to operating losses in prior periods and the ongoing need to set aside contingency reserves, which totaled $3.8 billion as of September 30, 2021, we do not anticipate that Radian Guaranty will be permitted under applicable insurance laws to pay ordinary dividends or other distributions to Radian Group for the foreseeable future without the prior approval from the Pennsylvania Insurance Department. Radian Reinsurance had positive unassigned surplus at December 31, 2020, and as a result, Radian Reinsurance paid an ordinary dividend of $36 million to Radian Group on September 22, 2021. Under state insurance regulations, Radian Guaranty is required to maintain minimum surplus levels and, in certain states, a maximum ratio of net RIF relative to statutory capital, or Risk-to-capital. There are 16 RBC States that currently impose a Statutory RBC Requirement. The most common Statutory RBC Requirement is that a mortgage insurer’s Risk-to-capital may not exceed 25 to 1. In certain of the RBC States, a mortgage insurer must satisfy a MPP Requirement. Radian Guaranty was in compliance with all applicable Statutory RBC Requirements and MPP Requirements in each of the RBC States as of September 30, 2021. Radian Guaranty’s Risk-to-capital was 11.4:1 and 12.7:1 as of September 30, 2021 and December 31, 2020, respectively. For purposes of the Risk-to-capital requirements imposed by certain states, statutory capital is defined as the sum of statutory policyholders’ surplus plus statutory contingency reserves. Our other mortgage insurance and title insurance subsidiaries were also in compliance with all statutory and counterparty capital requirements as of September 30, 2021. In addition, in order to be eligible to insure loans purchased by the GSEs, mortgage insurers such as Radian Guaranty must meet the GSEs’ eligibility requirements, or PMIERs. At September 30, 2021, Radian Guaranty is an approved mortgage insurer under the PMIERs and is in compliance with the current PMIERs financial requirements. Under the PMIERs there are increased financial requirements for loans in default, including as a result of natural disasters and pandemics. As a result, increases in defaults related to the COVID-19 pandemic have subjected Radian Guaranty to an increase in Minimum Required Assets under the PMIERs, and if these continue or increase, would continue to negatively impact our results of operations and could impact our compliance with the PMIERs. See Note 1 for discussion about the elevated risks and uncertainties associated with the COVID-19 pandemic and Note 16 of Notes to Consolidated Financial Statements in our 2020 Form 10-K for additional information regarding the PMIERs, including the benefit provided by the Disaster Related Capital Charge. Effective April 1, 2021, the Pennsylvania Insurance Department approved the termination of the 2020 Surplus Note via a conversion to Radian Guaranty’s gross paid-in and contributed surplus account. This conversion had no effect on Radian Guaranty’s total statutory policyholders’ surplus, Risk-to-capital or PMIERs Cushion.

Note 2 - Significant Accounti_2

Note 2 - Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Accounting, Policy	Basis of PresentationOur condensed consolidated financial statements are prepared in accordance with GAAP and include the accounts of Radian Group Inc. and its subsidiaries. All intercompany accounts and transactions, and intercompany profits and losses, have been eliminated. We have condensed or omitted certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with GAAP pursuant to the instructions set forth in Article 10 of Regulation S-X of the SEC.
Reclassification, Policy	Certain prior period amounts have been reclassified to conform to current period presentation, including: (i) certain balance sheet line items now reported in other assets and (ii) certain segment reporting balances due to changes in the composition of our segments during 2020.
Use of Estimates, Policy	Use of Estimates 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.
New Accounting Pronouncements and Changes in Accounting Principles	Recent Accounting Pronouncements Accounting Standards Adopted During 2021 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 and clarifies certain aspects to promote consistency among reporting entities. We adopted this update effective January 1, 2021. The adoption of this update did not have an impact on our financial statements and disclosures. 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, for each reporting period, to the extent the amortized cost basis of an individual callable debt security exceeds the amount repayable by the issuer at the next call date, the excess (i.e., the premium) should be amortized to the next call date. We adopted ASU 2020-08 on January 1, 2021 on a prospective basis. The adoption of this update did not have a material impact on our financial statements and disclosures. Accounting Standards Not Yet Adopted 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. 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.

Note 4 - Segment Reporting (Pol

Note 4 - Segment Reporting (Policies)	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Segment Reporting, Policy	We have two strategic business units that we manage separately—Mortgage and homegenius. Our Mortgage segment derives its revenue from mortgage insurance and other mortgage and risk services, including contract underwriting and fulfillment solutions provided to mortgage lending institutions and mortgage credit investors. Our homegenius segment offers a broad array of title, valuation, asset management, SaaS and other real estate services to mortgage lenders, mortgage and real estate investors, GSEs, real estate brokers and agents. In addition, we report as All Other activities that include: (i) income (losses) from assets held by our holding company; (ii) related general corporate operating expenses not attributable or allocated to our reportable segments; (iii) for all periods through its sale in January 2020, income and expenses related to Clayton; (iv) for all periods presented, the income and expenses related to our traditional appraisal services, which we wound down beginning in the fourth quarter of 2020; and (v) certain other immaterial revenue and expense items. As described in Note 4 of Notes to Consolidated Financial Statements in our 2020 Form 10-K, we implemented several changes to our segment reporting in 2020, including related to the wind down of our traditional appraisal business announced in the fourth quarter of 2020. All changes to the composition of our segment reporting have been reflected in our segment operating results for all periods presented. During the second quarter of 2021, our Real Estate segment was renamed “homegenius” to align with updates to our branding strategy for the segment’s products and services. The homegenius segment name change had no impact on the composition of our segments or on our previously reported historical financial position, results of operations, cash flow or segment level results.

Note 10 - Income Taxes (Policie

Note 10 - Income Taxes (Policies)	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Tax, Policy	We are required to establish a valuation allowance against our deferred tax assets when it is more likely than not that all or some portion of our deferred tax assets will not be realized. At each balance sheet date, we assess our need for a valuation allowance and this assessment is based on all available evidence, both positive and negative. This requires management to exercise judgment and make assumptions regarding whether our deferred tax assets will be realized in future periods.

Note 3 - Net Income (Loss) Pe_2

Note 3 - Net Income (Loss) Per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The calculation of basic and diluted net income per share is as follows. Net income per share Three Months Ended Nine Months Ended (In thousands, except per-share amounts) 2021 2020 2021 2020 Net income—basic and diluted $ 126,412 $ 135,103 $ 407,226 $ 245,613 Average common shares outstanding—basic 186,741 193,176 191,357 196,120 Dilutive effect of share-based compensation arrangements (1) 1,301 980 1,545 1,127 Adjusted average common shares outstanding—diluted 188,042 194,156 192,902 197,247 Net income per share: Basic $ 0.68 $ 0.70 $ 2.13 $ 1.25 Diluted $ 0.67 $ 0.70 $ 2.11 $ 1.25 (1) The following number of shares of our common stock equivalents issued under our share-based compensation arrangements are not included in the calculation of diluted net income per share because they are anti-dilutive. Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Shares of common stock equivalents — 710 — 1,046

Note 4 - Segment Reporting (Tab

Note 4 - Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]	The reconciliation of adjusted pretax operating income (loss) for our reportable segments to consolidated pretax income (loss) is as follows. Reconciliation of adjusted pretax operating income (loss) by segment Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Adjusted pretax operating income (loss) Mortgage $ 163,124 $ 147,336 $ 528,873 $ 267,182 homegenius (5,557) (5,046) (25,208) (12,108) Total adjusted pretax operating income (loss) for reportable segments (1) 157,567 142,290 503,665 255,074 All Other adjusted pretax operating income (loss) 3,082 2,690 9,019 6,006 Net gains (losses) on investments and other financial instruments 2,098 17,652 12,578 42,901 Amortization and impairment of other acquired intangible assets (862) (961) (2,587) (2,919) Impairment of other long-lived assets and other non-operating items (244) (466) (4,349) (788) Consolidated pretax income $ 161,641 $ 161,205 $ 518,326 $ 300,274 (1) Includes allocated corporate operating expenses and depreciation expense as follows. Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Mortgage Allocated corporate operating expenses (a) $ 34,341 $ 29,127 $ 95,225 $ 83,700 Direct depreciation expense 2,240 2,895 7,342 9,719 homegenius Allocated corporate operating expenses (b) $ 4,918 $ 3,248 $ 13,635 $ 9,438 Direct depreciation expense 639 679 1,828 2,113 (a) Includes allocated depreciation expense of $0.8 million and $2.5 million for the three and nine months ended September 30, 2021, respectively, and $0.8 million and $1.7 million for the three and nine months ended September 30, 2020, respectively. (b) Includes allocated depreciation expense of $0.1 million and $0.4 million for the three and nine months ended September 30, 2021, respectively, and $0.1 million and $0.2 million for the three and nine months ended September 30, 2020, respectively.
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	The reconciliation of revenue for our reportable segments to consolidated revenues is as follows. Reconciliation of revenues by segment Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Revenues Mortgage (1) $ 274,659 $ 320,013 $ 862,757 $ 922,040 homegenius (2) 45,091 29,793 104,337 78,866 Total revenues for reportable segments 319,750 349,806 967,094 1,000,906 All Other revenues (1) 3,996 8,641 12,100 25,869 Net gains (losses) on investments and other financial instruments 2,098 17,652 12,578 42,901 Other non-operating revenue — — — 247 Elimination of inter-segment revenues (86) (865) (207) (1,167) Total revenues $ 325,758 $ 375,234 $ 991,565 $ 1,068,756 (1) Includes immaterial inter-segment revenues for the nine months ended September 30, 2020. (2) Includes immaterial inter-segment revenues for the three and nine months ended September 30, 2021 and 2020.
Services Revenue [Table Text Block]	The table below, which represents total services revenue on our condensed consolidated statements of operations for the periods indicated, represents the disaggregation of services revenues from external customers, by type. Services revenue Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 homegenius services Title services $ 12,926 $ 5,085 $ 30,382 $ 17,671 Asset management services 9,538 7,379 20,976 22,275 Valuation services 9,418 7,177 22,798 17,195 SaaS and other real estate services 837 2,120 2,742 5,340 Mortgage services 5,027 3,914 13,110 10,965 All Other services (1) 27 8,268 124 20,499 Total services revenue $ 37,773 $ 33,943 $ 90,132 $ 93,945 (1) Includes services revenue from Clayton prior to its sale in January 2020 and amounts related to our traditional appraisal business, which we wound down beginning in the fourth quarter of 2020.

Note 5 - Fair Value of Financ_2

Note 5 - Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	The following tables include a list of assets that are measured at fair value by hierarchy level as of September 30, 2021 and December 31, 2020. Assets carried at fair value by hierarchy level September 30, 2021 (In thousands) Level I Level II Level III Total Investments Fixed-maturities available for sale U.S. government and agency securities $ 225,540 $ 29,618 $ — $ 255,158 State and municipal obligations — 161,011 — 161,011 Corporate bonds and notes — 2,936,922 — 2,936,922 RMBS — 713,106 — 713,106 CMBS — 706,641 — 706,641 CLO — 559,320 — 559,320 Other ABS — 195,019 — 195,019 Foreign government and agency securities — 5,344 — 5,344 Mortgage insurance-linked notes (1) — 47,691 — 47,691 Total fixed-maturities available for sale 225,540 5,354,672 — 5,580,212 Trading securities State and municipal obligations — 99,329 — 99,329 Corporate bonds and notes — 120,298 — 120,298 RMBS — 10,147 — 10,147 CMBS — 33,589 — 33,589 Total trading securities — 263,363 — 263,363 Equity securities 185,214 8,284 — 193,498 Short-term investments U.S. government and agency securities 84,823 — — 84,823 State and municipal obligations — 12,470 — 12,470 Money market instruments 331,280 — — 331,280 Corporate bonds and notes — 33,080 — 33,080 CMBS — 4,748 — 4,748 Other ABS — 28 — 28 Other investments (2) — 151,086 — 151,086 Total short-term investments 416,103 201,412 — 617,515 Other invested assets (3) — — 3,000 3,000 Total investments at fair value (3) 826,857 5,827,731 3,000 6,657,588 Other Embedded derivatives (4) — — 5,499 5,499 Loaned securities (5) U.S. government and agency securities 19,830 — — 19,830 Corporate bonds and notes — 86,480 — 86,480 Equity securities 28,748 — — 28,748 Total assets at fair value (3) $ 875,435 $ 5,914,211 $ 8,499 $ 6,798,145 (1) Comprises the notes purchased by Radian Group in connection with the Excess-of-Loss Program. See Note 8 for more information about our reinsurance programs. (2) Comprising short-term certificates of deposit and commercial paper. (3) Does not include other invested assets of $0.9 million that are primarily invested in limited partnership investments valued using the net asset value as a practical expedient. (4) Embedded derivatives related to our Excess-of-Loss Program are classified as other assets in our consolidated balance sheets. See Note 8 for more information about our reinsurance programs. (5) Securities loaned to third-party borrowers under securities lending agreements are classified as other assets in our condensed consolidated balance sheets. See Note 6 for more information. Assets carried at fair value by hierarchy level December 31, 2020 (In thousands) Level I Level II Level III Total Investments Fixed-maturities available for sale U.S. government and agency securities $ 140,034 $ 29,189 $ — $ 169,223 State and municipal obligations — 165,271 — 165,271 Corporate bonds and notes — 3,047,189 — 3,047,189 RMBS — 833,939 — 833,939 CMBS — 681,265 — 681,265 CLO — 568,558 — 568,558 Other ABS — 252,457 — 252,457 Foreign government and agency securities — 5,438 — 5,438 Total fixed-maturities available for sale 140,034 5,583,306 — 5,723,340 Trading securities State and municipal obligations — 120,449 — 120,449 Corporate bonds and notes — 123,142 — 123,142 RMBS — 13,000 — 13,000 CMBS — 34,294 — 34,294 Total trading securities — 290,885 — 290,885 Equity securities 142,761 8,479 — 151,240 Short-term investments State and municipal obligations — 21,819 — 21,819 Money market instruments 268,900 — — 268,900 Corporate bonds and notes — 30,495 — 30,495 Other ABS — 219 — 219 Other investments (1) — 296,571 — 296,571 Total short-term investments 268,900 349,104 — 618,004 Other invested assets (2) — — 3,000 3,000 Total investments at fair value (2) 551,695 6,231,774 3,000 6,786,469 Other Embedded derivatives (3) — — 5,513 5,513 Loaned securities (4) U.S. government and agency securities 4,876 — — 4,876 Corporate bonds and notes — 31,324 — 31,324 Equity securities 21,299 — — 21,299 Total assets at fair value (2) $ 577,870 $ 6,263,098 $ 8,513 $ 6,849,481 (1) Comprising short-term certificates of deposit and commercial paper. (2) Does not include other invested assets of $2.0 million that are primarily invested in limited partnership investments valued using the net asset value as a practical expedient. (3) Embedded derivatives related to our Excess-of-Loss Program are classified as other assets in our consolidated balance sheets. See Note 8 for more information about our reinsurance programs. (4) Securities loaned to third-party borrowers under securities lending agreements are classified as other assets in our condensed consolidated balance sheets. See Note 6 for more information.
Fair Value, by Balance Sheet Grouping [Table Text Block]	The carrying value and estimated fair value of other selected liabilities not carried at fair value in our condensed consolidated balance sheets were as follows as of the dates indicated. Financial liabilities not carried at fair value September 30, 2021 December 31, 2020 (In thousands) Carrying Estimated Carrying Estimated Senior notes $ 1,408,502 $ 1,556,285 $ 1,405,674 $ 1,563,503 FHLB advances 172,649 174,551 176,483 179,578

Note 6 - Investments (Tables)

Note 6 - Investments (Tables)	9 Months Ended
	Sep. 30, 2021
Investments [Abstract]
Available for Sale Securities [Table Text Block]	Our available for sale securities within our investment portfolio consisted of the following as of the dates indicated. Available for sale securities September 30, 2021 (In thousands) Amortized Allowance for Credit Losses Gross Gross Fair Value Fixed-maturities available for sale U.S. government and agency securities $ 256,519 $ — $ 523 $ (1,884) $ 255,158 State and municipal obligations 146,234 — 15,134 (357) 161,011 Corporate bonds and notes 2,892,347 — 155,631 (24,981) 3,022,997 RMBS 695,481 — 20,925 (3,300) 713,106 CMBS 680,503 — 28,619 (2,481) 706,641 CLO 558,523 — 1,340 (543) 559,320 Other ABS 193,727 — 1,768 (476) 195,019 Foreign government and agency securities 5,107 — 237 — 5,344 Mortgage insurance-linked notes (1) 45,384 — 2,307 — 47,691 Total securities available for sale, including loaned securities 5,473,825 $ — $ 226,484 $ (34,022) 5,666,287 Less: loaned securities (2) 82,241 86,075 Total fixed-maturities available for sale $ 5,391,584 $ 5,580,212 (1) Comprises the notes purchased by Radian Group in connection with the Excess-of-Loss Program. See Note 8 for more information about our reinsurance programs. (2) Included in other assets in our consolidated balance sheet as further described below. See below for a discussion of our securities lending agreements. Available for sale securities December 31, 2020 (In thousands) Amortized Allowance for Credit Losses Gross Gross Fair Value Fixed-maturities available for sale U.S. government and agency securities $ 176,033 $ — $ 1,677 $ (3,611) $ 174,099 State and municipal obligations 149,258 — 16,113 (100) 165,271 Corporate bonds and notes 2,832,350 (948) 250,771 (3,758) 3,078,415 RMBS 799,814 — 34,439 (314) 833,939 CMBS 645,071 — 39,495 (3,301) 681,265 CLO 569,173 — 2,026 (2,641) 568,558 Other ABS 249,988 — 2,901 (432) 252,457 Foreign government and agency securities 5,100 — 338 — 5,438 Total securities available for sale, including loaned securities 5,426,787 $ (948) $ 347,760 $ (14,157) 5,759,442 Less: loaned securities (1) 33,164 36,102 Total fixed-maturities available for sale $ 5,393,623 $ 5,723,340 (1) Included in other assets in our consolidated balance sheet as further described below. See below for a discussion of our securities lending agreements.
Debt Securities, Available-for-sale, Allowance for Credit Loss	The following table provides a rollforward of the allowance for credit losses on fixed-maturities available for sale, which relates entirely to corporate bonds and notes for the periods indicated. Rollforward of allowance for credit losses on fixed-maturities available for sale Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Beginning balance $ — $ 2,476 $ 948 $ — Current provision for securities without prior allowance — — — 2,596 Net increases (decreases) in allowance on previously impaired securities — (186) (918) — Reduction for securities sold — — (30) (306) Ending balance $ — $ 2,290 $ — $ 2,290
Gross Unrealized Losses and Fair Value of Available for Sale Securities [Table Text Block]	the following tables show the gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, as of the dates indicated. Included in the amounts as of September 30, 2021 and December 31, 2020 are loaned securities under securities lending agreements that are classified as other assets in our condensed consolidated balance sheets, as further described below. Unrealized losses on fixed-maturities available for sale by category and length of time September 30, 2021 ($ in thousands) Less Than 12 Months 12 Months or Greater Total Description of Securities # of Fair Value Unrealized # of Fair Value Unrealized # of Fair Value Unrealized U.S. government and agency securities 14 $ 175,339 $ (1,207) 2 $ 9,477 $ (677) 16 $ 184,816 $ (1,884) State and municipal obligations 15 20,223 (254) 1 2,831 (103) 16 23,054 (357) Corporate bonds and notes 175 719,649 (16,424) 32 90,207 (8,557) 207 809,856 (24,981) RMBS 36 258,829 (3,291) 2 758 (9) 38 259,587 (3,300) CMBS 59 118,990 (1,555) 12 25,224 (926) 71 144,214 (2,481) CLO 68 251,734 (287) 14 55,150 (256) 82 306,884 (543) Other ABS 44 99,325 (453) 2 859 (23) 46 100,184 (476) Total 411 $ 1,644,089 $ (23,471) 65 $ 184,506 $ (10,551) 476 $ 1,828,595 $ (34,022) December 31, 2020 ($ in thousands) Less Than 12 Months 12 Months or Greater Total Description of Securities # of Fair Value Unrealized # of Fair Value Unrealized # of Fair Value Unrealized U.S. government and agency securities 4 $ 90,591 $ (3,611) — $ — $ — 4 $ 90,591 $ (3,611) State and municipal obligations 4 9,626 (100) — — — 4 9,626 (100) Corporate bonds and notes 60 174,848 (3,758) — — — 60 174,848 (3,758) RMBS 5 42,003 (305) 2 915 (9) 7 42,918 (314) CMBS 43 118,345 (3,035) 6 8,312 (266) 49 126,657 (3,301) CLO 52 173,459 (970) 25 137,506 (1,671) 77 310,965 (2,641) Other ABS 26 70,759 (322) 3 12,119 (110) 29 82,878 (432) Total 194 $ 679,631 $ (12,101) 36 $ 158,852 $ (2,056) 230 $ 838,483 $ (14,157)
Net Gains (Losses) on Investments [Table Text Block]	Net gains (losses) on investments consisted of the following. Net gains (losses) on investments Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Net realized gains (losses) Fixed-maturities available for sale (1) $ 4,098 $ 13,777 $ 5,684 $ 31,998 Trading securities — — 391 4 Equity securities 8,632 — 8,405 361 Other investments 1,516 196 3,850 273 Net realized gains (losses) on investments 14,246 13,973 18,330 32,636 Impairment losses due to intent to sell — — — (1,401) Net decrease (increase) in expected credit losses — 186 918 (2,596) Net unrealized gains (losses) on investments (11,342) 2,813 (5,825) 916 Total net gains (losses) on investments $ 2,904 $ 16,972 $ 13,423 $ 29,555 (1) Components of net realized gains (losses) on fixed-maturities available for sale include the following. Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Gross investment gains from sales and redemptions $ 5,874 $ 14,219 $ 19,588 $ 34,422 Gross investment losses from sales and redemptions (1,776) (442) (13,904) (2,424)
Net Changes in Unrealized Gains (Losses) Recognized in Earnings [Table Text Block]	The net changes in unrealized gains (losses) recognized in earnings on investments that were still held at each period-end were as follows. Net changes in unrealized gains (losses) on investments still held Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Net unrealized gains (losses) on investments still held Trading securities $ (2,659) $ (1,150) $ (6,011) $ 9,990 Equity securities (1,086) 4,455 6,251 (8,158) Other investments (13) (173) 1,050 152 Net unrealized gains (losses) on investments still held $ (3,758) $ 3,132 $ 1,290 $ 1,984
Contractual Maturities [Table Text Block]	The contractual maturities of fixed-maturities available for sale were as follows. Contractual maturities of fixed-maturities available for sale September 30, 2021 Available for Sale (In thousands) Amortized Fair Due in one year or less $ 194,384 $ 195,823 Due after one year through five years (1) 1,113,491 1,159,751 Due after five years through 10 years (1) 1,222,598 1,276,635 Due after 10 years (1) 769,734 812,301 Asset-backed and mortgage-backed securities (2) 2,173,618 2,221,777 Total 5,473,825 5,666,287 Less: loaned securities 82,241 86,075 Total fixed-maturities available for sale $ 5,391,584 $ 5,580,212 (1) Actual maturities may differ as a result of calls before scheduled maturity.

Note 7 - Goodwill and Other A_2

Note 7 - Goodwill and Other Acquired Intangible Assets, Net (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Other Intangible Assets [Table Text Block]	The following is a summary of the gross and net carrying amounts and accumulated amortization (including impairment) of our other acquired intangible assets as of the periods indicated. Other acquired intangible assets September 30, 2021 December 31, 2020 (In thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Client relationships $ 43,550 $ (33,855) $ 9,695 $ 43,550 $ (31,559) $ 11,991 Technology 8,285 (7,599) 686 8,285 (7,370) 915 Licenses 463 (190) 273 463 (128) 335 Total $ 52,298 $ (41,644) $ 10,654 $ 52,298 $ (39,057) $ 13,241

Note 8 - Reinsurance (Tables)

Note 8 - Reinsurance (Tables)	9 Months Ended
	Sep. 30, 2021
Reinsurance Disclosures [Abstract]
Reinsurance, Net Premiums Written and Earned [Table Text Block]	The effect of all of our reinsurance programs on our net income is as follows. Reinsurance impacts on net premiums written and earned Net Premiums Written Net Premiums Earned Three Months Ended Nine Months Ended Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 2021 2020 2021 2020 Direct Mortgage insurance $ 240,669 $ 266,067 $ 734,993 $ 812,806 $ 265,378 $ 325,556 $ 835,462 $ 937,827 Title insurance 12,570 3,173 27,714 7,461 12,570 3,173 27,714 7,461 Total direct 253,239 269,240 762,707 820,267 277,948 328,729 863,176 945,288 Assumed (1) Mortgage insurance 1,683 2,942 5,596 9,585 1,683 2,946 5,596 9,599 Ceded (2) Mortgage insurance (14,236) (9,731) (34,572) (72,681) (30,194) (45,146) (92,441) (141,475) Title insurance (319) (58) (585) (231) (319) (58) (585) (231) Total ceded (14,555) (9,789) (35,157) (72,912) (30,513) (45,204) (93,026) (141,706) Total Net premiums $ 240,367 $ 262,393 $ 733,146 $ 756,940 $ 249,118 $ 286,471 $ 775,746 $ 813,181 (1) Primarily includes premiums from our participation in certain credit risk transfer programs. (2) Net of profit commission, which is impacted by the level of ceded losses recoverable, if any, on reinsurance transactions. See Note 11 for additional information on our reserve for losses and reinsurance recoverables. Other reinsurance impacts Three Months Ended Nine Months Ended (In thousands) 2021 2020 2021 2020 Ceding commissions earned (1) $ 7,120 $ 17,038 $ 25,446 $ 40,457 Ceded losses (2) 795 10,189 3,463 51,786 (1) Ceding commissions earned are primarily related to mortgage insurance and are included as an offset to expenses primarily in other operating expenses on our condensed consolidated statements of operations. Deferred ceding commissions of $40.7 million and $52.5 million are included in other liabilities on our condensed consolidated balance sheets at September 30, 2021 and December 31, 2020, respectively. (2) Primarily all related to mortgage insurance.
Schedule of Single Premium Quota Share Reinsurance Program Details [Table Text Block]	The following table sets forth additional details regarding the Single Premium QSR Program. Single Premium QSR Program 2020 Singles QSR 2018 Singles QSR 2016 Singles QSR NIW Policy Dates Jan 1, 2020-Dec 31, 2021 Jan 1, 2018-Dec 31, 2019 Jan 1, 2012-Dec 31, 2017 Effective Date January 1, 2020 January 1, 2018 January 1, 2016 Scheduled Termination Date December 31, 2031 December 31, 2029 December 31, 2027 Optional Termination Date January 1, 2024 January 1, 2022 January 1, 2020 Quota Share % 65% 65% 20% - 65% (1) Ceding Commission % 25% 25% 25% Profit Commission % Up to 56% Up to 56% Up to 55% (In millions) As of September 30, 2021 RIF Ceded $ 2,046 $ 1,279 $ 2,115 (In millions) As of December 31, 2020 RIF Ceded $ 1,597 $ 1,979 $ 3,071 (1) Effective December 31, 2017, we amended the 2016 Single Premium QSR Agreement to increase the amount of ceded risk on performing loans under the agreement from 35% to 65% for the 2015 through 2017 vintages. Loans included in the 2012 through 2014 vintages, and any other loans subject to the agreement that were delinquent at the time of the amendment, were unaffected by the change and therefore the amount of ceded risk for those loans continues to range from 20% to 35%.
Schedule of Collateralized Reinsurance Agreements [Table Text Block]	The following table sets forth additional details regarding the Excess-of-Loss Program as of September 30, 2021. Excess-of-Loss Program (In millions) Eagle Re Eagle Re Eagle Re Eagle Re Eagle Re Issued April 2021 October 2020 February 2020 April 2019 November 2018 NIW Policy Dates Aug 1, 2020- Oct 1, 2019- Jan 1, 2019- Jan 1, 2018- Jan 1, 2017- Initial RIF $ 11,061 $ 13,011 $ 9,866 $ 10,705 $ 9,109 Initial Coverage 498 (1) 390 488 562 434 (2) Initial First Layer Retention 221 423 202 268 205 (In millions) As of September 30, 2021 RIF $ 9,999 $ 8,451 $ 3,727 $ 2,787 $ 2,415 Remaining Coverage 498 206 488 385 276 (2) First Layer Retention 221 423 202 264 201 (In millions) As of December 31, 2020 RIF $ — $ 11,748 $ 6,121 $ 4,657 $ 3,986 Remaining Coverage — 390 488 385 276 (2) First Layer Retention — 423 202 265 201 (1) Radian Group purchased $45.4 million original principal amount of these mortgage insurance-linked notes, which are included in fixed-maturities available for sale on our condensed consolidated balance sheet at September 30, 2021. See Notes 5 and 6 for additional information.
Schedule of VIE Assets [Table Text Block]	The following table presents the total assets and liabilities of the Eagle Re Issuers as of the dates indicated. Total assets and liabilities of Eagle Re Issuers (1) (In thousands) September 30, December 31, Eagle Re 2021-1 Ltd. $ 497,735 $ — Eagle Re 2020-2 Ltd. 205,581 390,324 Eagle Re 2020-1 Ltd. 488,385 488,385 Eagle Re 2019-1 Ltd. 384,602 384,602 Eagle Re 2018-1 Ltd. 275,718 275,718 Total $ 1,852,021 $ 1,539,029 (1) Assets held by the Eagle Re Issuers are required to be invested in U.S. government money market funds, cash or U.S. Treasury securities. Liabilities of the Eagle Re Issuers consist of their mortgage insurance-linked notes, described above. Assets and liabilities are equal to each other for each of the Eagle Re Issuers.

Note 9 - Other Assets (Tables)

Note 9 - Other Assets (Tables)	9 Months Ended
	Sep. 30, 2021
Other Assets [Abstract]
Schedule of Other Assets [Table Text Block]	The following table shows the components of other assets as of the dates indicated. Other assets (In thousands) September 30, December 31, Prepaid federal income taxes (Note 10) $ 313,123 $ 210,889 Prepaid reinsurance premiums (1) 209,769 267,638 Loaned securities (Note 5) 135,058 57,499 Company-owned life insurance (2) 112,503 115,586 Right-of-use assets (Note 13) 32,690 32,985 Other 35,918 30,488 Total other assets $ 839,061 $ 715,085 (1) Relates primarily to our Single Premium QSR Program. (2) We are the beneficiary of insurance policies on the lives of certain of our current and past officers and employees. The balances reported in other assets reflect the amounts that could be realized upon surrender of the insurance policies as of each respective date.

Note 11 - Losses and LAE (Table

Note 11 - Losses and LAE (Tables)	9 Months Ended
	Sep. 30, 2021
Insurance Loss Reserves [Abstract]
Reserve for Losses and LAE by Segment	Our reserve for losses and LAE, at the end of each period indicated, consisted of the following. Reserve for losses and LAE (In thousands) September 30, December 31, Mortgage insurance loss reserves (1) $ 888,021 $ 844,107 Title insurance loss reserves 5,134 4,306 Total reserve for losses and LAE $ 893,155 $ 848,413 (1) Primarily comprises first lien primary case reserves of $851.2 million and $799.5 million at September 30, 2021 and December 31, 2020, respectively.
Mortgage Insurance Reserve for Losses and LAE Rollforward	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. Rollforward of mortgage insurance reserve for losses Nine Months Ended (In thousands) 2021 2020 Balance at beginning of period $ 844,107 $ 401,273 Less: Reinsurance recoverables (1) 71,769 14,594 Balance at beginning of period, net of reinsurance recoverables 772,338 386,679 Add: Losses and LAE incurred in respect of default notices reported and unreported in: Current year (2) 119,823 448,584 Prior years (53,947) (21,494) Total incurred 65,876 427,090 Deduct: Paid claims and LAE related to: Current year (2) 499 2,841 Prior years 24,431 54,167 Total paid 24,930 57,008 Balance at end of period, net of reinsurance recoverables 813,284 756,761 Add: Reinsurance recoverables (1) 74,737 64,947 Balance at end of period $ 888,021 $ 821,708 (1) Related to ceded losses recoverable, if any, on reinsurance transactions. See Note 8 for additional information. (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.

Note 12 - Borrowings and Fina_2

Note 12 - Borrowings and Financing Activities (Tables)	9 Months Ended
	Sep. 30, 2021
Senior Notes [Abstract]
Schedule of Debt [Table Text Block]	The carrying value of our debt at September 30, 2021 and December 31, 2020 was as follows. Borrowings (In thousands) September 30, December 31, Senior notes Senior Notes due 2024 $ 446,346 $ 445,512 Senior Notes due 2025 517,950 516,634 Senior Notes due 2027 444,206 443,528 Total senior notes $ 1,408,502 $ 1,405,674 FHLB advances FHLB advances due 2021 $ 31,667 $ 67,500 FHLB advances due 2022 61,050 61,050 FHLB advances due 2023 52,994 27,995 FHLB advances due 2024 13,954 9,954 FHLB advances due 2025 9,984 9,984 FHLB advances due 2027 3,000 — Total FHLB advances $ 172,649 $ 176,483

Note 14 - Capital Stock (Tables

Note 14 - Capital Stock (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity	Information with regard to RSUs to be settled in stock for periods indicated is as follows. Rollforward of RSUs Performance-Based Time-Vested Number of Shares Weighted-Average Grant Date Fair Value Number of Shares Weighted-Average Grant Date Fair Value Outstanding, December 31, 2020 (1) 2,186,244 $ 15.71 2,118,885 $ 13.16 Granted (2) 578,790 $ 20.39 511,166 $ 21.63 Performance adjustment (3) 421,357 $ — — $ — Vested (4) (811,578) $ 15.98 (456,790) $ 15.95 Forfeited (29,071) $ 18.12 (27,099) $ 17.67 Outstanding, September 30, 2021 (1) 2,345,742 $ 16.76 2,146,162 $ 14.53 (1) Outstanding RSUs represent shares that have not yet been issued because not all conditions necessary to earn the right to benefit from the instruments have been satisfied. The final number of RSUs distributed depends on the cumulative growth in Radian's book value over the respective three-year performance period and, with the exception of certain retirement-eligible employees, continued service through the vesting date, which could result in changes in vested RSUs. (2) For performance-based RSUs, number represents the number of target shares at grant date. (3) For performance-based RSUs, represents the difference between the number of target shares at grant date and the number of shares vested at settlement, which can range from 0 to 200% of target depending on results over the applicable performance periods. (4) Represents amounts vested during the year, including the impact of performance adjustments for performance-based awards.

Note 16 - Statutory Informati_2

Note 16 - Statutory Information (Tables)	9 Months Ended
	Sep. 30, 2021
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]
Statutory Accounting Practices Disclosure	Our insurance subsidiaries’ statutory net income for the year-to-date periods ended September 30, 2021 and 2020 and statutory policyholders’ surplus as of September 30, 2021 and December 31, 2020 were as follows. Statutory net income Nine Months Ended September 30, (In thousands) 2021 2020 Radian Guaranty $ 516,866 $ 260,175 Radian Reinsurance 8,765 30,358 Other Mortgage Subsidiaries 777 929 Radian Title Insurance 4,777 1,399 Statutory policyholders’ surplus (In thousands) September 30, December 31, Radian Guaranty $ 646,923 $ 481,484 Radian Reinsurance 328,430 360,704 Other Mortgage Subsidiaries 42,715 41,327 Radian Title Insurance 34,342 28,849

Note 1 - Description of Busin_2

Note 1 - Description of Business (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)segment	Dec. 31, 2020USD ($)
Business Overview [Abstract]
Number of Reportable Business Segments | segment	2
Mortgage segment
Mortgage Insurance [Abstract]
Private Mortgage Insurance Protects Lenders For Loans Made With Less Than This Maximum Down Payment Percentage	20.00%
Private Mortgage Insurance Protects Lenders For Refinancings Made to Home Buyers With Less Than This Maximum Equity-Ownership Percentage	20.00%
Direct Primary Mortgage Insurance in Force	$ 241,600	$ 246,100
Direct Primary Mortgage Insurance RIF	59,400	60,700
Credit Risk Transfer Transactions | Mortgage segment
Mortgage Insurance [Abstract]
Direct Primary Mortgage Insurance RIF	$ 429.3	$ 392

Note 3 - Net Income (Loss) Pe_3

Note 3 - Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) - basic	$ 126,412	$ 135,103	$ 407,226	$ 245,613
Average common shares outstanding - basic	186,741	193,176	191,357	196,120
Net income (loss) per share - basic	$ 0.68	$ 0.70	$ 2.13	$ 1.25
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)—diluted	$ 126,412	$ 135,103	$ 407,226	$ 245,613
Dilutive effect of share-based compensation arrangements	1,301	980	1,545	1,127
Adjusted average common shares outstanding—diluted	188,042	194,156	192,902	197,247
Net income (loss) per share—diluted	$ 0.67	$ 0.70	$ 2.11	$ 1.25
Stock Compensation Plan
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Shares of common stock equivalents	0	710	0	1,046

Note 4 - Segment Reporting - Se

Note 4 - Segment Reporting - Segments (Details)	9 Months Ended
	Sep. 30, 2021segment
Segment Reporting Information [Line Items]
Number of Operating Segments	2

Note 4 - Segment Reporting - Ad

Note 4 - Segment Reporting - Adjusted Pretax Operating Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted pretax operating income (loss)	$ 157,567	$ 142,290	$ 503,665	$ 255,074
Net gains (losses) on investments and other financial instruments	2,098	17,652	12,578	42,901
Amortization and impairment of other acquired intangible assets	(862)	(961)	(2,587)	(2,919)
Consolidated pretax income (loss)	161,641	161,205	518,326	300,274
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net gains (losses) on investments and other financial instruments	2,098	17,652	12,578	42,901
Amortization and impairment of other acquired intangible assets	(862)	(961)	(2,587)	(2,919)
Impairment of other long-lived assets and other-non-operating items	(244)	(466)	(4,349)	(788)
Mortgage segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted pretax operating income (loss)	163,124	147,336	528,873	267,182
Allocated corporate operating expenses	34,341	29,127	95,225	83,700
Direct depreciation expense	2,240	2,895	7,342	9,719
Mortgage segment | Depreciation Expense
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Allocated corporate operating expenses	800	800	2,500	1,700
homegenius segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted pretax operating income (loss)	(5,557)	(5,046)	(25,208)	(12,108)
Allocated corporate operating expenses	4,918	3,248	13,635	9,438
Direct depreciation expense	639	679	1,828	2,113
homegenius segment | Depreciation Expense
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Allocated corporate operating expenses	100	100	400	200
All Other activities segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted pretax operating income (loss)	$ 3,082	$ 2,690	$ 9,019	$ 6,006

Note 4 - Segment Reporting - Re

Note 4 - Segment Reporting - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenues	$ 325,758	$ 375,234	$ 991,565	$ 1,068,756
Net gains (losses) on investments and other financial instruments	2,098	17,652	12,578	42,901
Other non-operating revenue	0	0	0	247
Services Revenue, Net	37,773	33,943	90,132	93,945
Accounts and notes receivable	166,730		166,730		$ 121,294
Mortgage segment
Revenues	274,659	320,013	862,757	922,040
homegenius segment
Revenues	45,091	29,793	104,337	78,866
Accounts and notes receivable	17,700		17,700		$ 18,800
All Other activities segment
Revenues	3,996	8,641	12,100	25,869
Title services
Services Revenue, Net	12,926	5,085	30,382	17,671
Asset management services
Services Revenue, Net	9,538	7,379	20,976	22,275
Valuation services
Services Revenue, Net	9,418	7,177	22,798	17,195
SaaS and other real estate services
Services Revenue, Net	837	2,120	2,742	5,340
Mortgage services
Services Revenue, Net	5,027	3,914	13,110	10,965
All Other services
Services Revenue, Net	27	8,268	124	20,499
Operating Segments | Mortgage and homegenius segments
Revenues	319,750	349,806	967,094	1,000,906
Intersegment Eliminations
Revenues	$ (86)	$ (865)	$ (207)	$ (1,167)

Note 5 - Fair Value of Financ_3

Note 5 - Fair Value of Financial Instruments - Assets Measured at Fair Value by Hierarchy Level (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	$ 135,058,000	$ 135,058,000	$ 57,499,000
Other Investments	3,899,000	3,899,000	4,973,000
Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	6,657,588,000	6,657,588,000	6,786,469,000
Derivative, Fair Value, Net	5,499,000	5,499,000	5,513,000
Assets, Fair Value Disclosure	6,798,145,000	6,798,145,000	6,849,481,000
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	826,857,000	826,857,000	551,695,000
Derivative, Fair Value, Net	0	0	0
Assets, Fair Value Disclosure	875,435,000	875,435,000	577,870,000
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	5,827,731,000	5,827,731,000	6,231,774,000
Derivative, Fair Value, Net	0	0	0
Assets, Fair Value Disclosure	5,914,211,000	5,914,211,000	6,263,098,000
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	3,000,000	3,000,000	3,000,000
Derivative, Fair Value, Net	5,499,000	5,499,000	5,513,000
Assets, Fair Value Disclosure	8,499,000	8,499,000	8,513,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net	0	0	0
Securities Financing Transaction, Fair Value | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	19,830,000	19,830,000	4,876,000
Securities Financing Transaction, Fair Value | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	86,480,000	86,480,000	31,324,000
Securities Financing Transaction, Fair Value | Fair Value, Measurements, Recurring | Equity securities
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	28,748,000	28,748,000	21,299,000
Securities Financing Transaction, Fair Value | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	19,830,000	19,830,000	4,876,000
Securities Financing Transaction, Fair Value | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	0	0	0
Securities Financing Transaction, Fair Value | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Equity securities
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	28,748,000	28,748,000	21,299,000
Securities Financing Transaction, Fair Value | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	0	0	0
Securities Financing Transaction, Fair Value | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	86,480,000	86,480,000	31,324,000
Securities Financing Transaction, Fair Value | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Equity securities
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	0	0	0
Securities Financing Transaction, Fair Value | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	0	0	0
Securities Financing Transaction, Fair Value | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	0	0	0
Securities Financing Transaction, Fair Value | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Equity securities
Fair Value by Hierarchy Level [Line Items]
Less: loaned securities	0	0	0
Fixed-maturities available for sale | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	5,580,212,000	5,580,212,000	5,723,340,000
Fixed-maturities available for sale | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	255,158,000	255,158,000	169,223,000
Fixed-maturities available for sale | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	161,011,000	161,011,000	165,271,000
Fixed-maturities available for sale | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	2,936,922,000	2,936,922,000	3,047,189,000
Fixed-maturities available for sale | Fair Value, Measurements, Recurring | RMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	713,106,000	713,106,000	833,939,000
Fixed-maturities available for sale | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	706,641,000	706,641,000	681,265,000
Fixed-maturities available for sale | Fair Value, Measurements, Recurring | CLO
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	559,320,000	559,320,000	568,558,000
Fixed-maturities available for sale | Fair Value, Measurements, Recurring | Other ABS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	195,019,000	195,019,000	252,457,000
Fixed-maturities available for sale | Fair Value, Measurements, Recurring | Foreign government and agency securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	5,344,000	5,344,000	5,438,000
Fixed-maturities available for sale | Fair Value, Measurements, Recurring | Mortgage insurance-linked notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	47,691,000	47,691,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	225,540,000	225,540,000	140,034,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	225,540,000	225,540,000	140,034,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | RMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | CLO
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Other ABS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Foreign government and agency securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Mortgage insurance-linked notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	5,354,672,000	5,354,672,000	5,583,306,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	29,618,000	29,618,000	29,189,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	161,011,000	161,011,000	165,271,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	2,936,922,000	2,936,922,000	3,047,189,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | RMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	713,106,000	713,106,000	833,939,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	706,641,000	706,641,000	681,265,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | CLO
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	559,320,000	559,320,000	568,558,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Other ABS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	195,019,000	195,019,000	252,457,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Foreign government and agency securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	5,344,000	5,344,000	5,438,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Mortgage insurance-linked notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	47,691,000	47,691,000
Fixed-maturities available for sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | RMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | CLO
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Other ABS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Foreign government and agency securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Fixed-maturities available for sale | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Mortgage insurance-linked notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0
Trading Securities | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	263,363,000	263,363,000	290,885,000
Trading Securities | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	99,329,000	99,329,000	120,449,000
Trading Securities | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	120,298,000	120,298,000	123,142,000
Trading Securities | Fair Value, Measurements, Recurring | RMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	10,147,000	10,147,000	13,000,000
Trading Securities | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	33,589,000	33,589,000	34,294,000
Trading Securities | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Trading Securities | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Trading Securities | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Trading Securities | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | RMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Trading Securities | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Trading Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	263,363,000	263,363,000	290,885,000
Trading Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	99,329,000	99,329,000	120,449,000
Trading Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	120,298,000	120,298,000	123,142,000
Trading Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | RMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	10,147,000	10,147,000	13,000,000
Trading Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	33,589,000	33,589,000	34,294,000
Trading Securities | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Trading Securities | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Trading Securities | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Trading Securities | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | RMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Trading Securities | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Equity securities | Fair Value, Measurements, Recurring | Equity securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	193,498,000	193,498,000	151,240,000
Equity securities | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Equity securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	185,214,000	185,214,000	142,761,000
Equity securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Equity securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	8,284,000	8,284,000	8,479,000
Equity securities | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Equity securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	617,515,000	617,515,000	618,004,000
Short-term investments | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	84,823,000	84,823,000
Short-term investments | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	12,470,000	12,470,000	21,819,000
Short-term investments | Fair Value, Measurements, Recurring | Money market instruments
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	331,280,000	331,280,000	268,900,000
Short-term investments | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	33,080,000	33,080,000	30,495,000
Short-term investments | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	4,748,000	4,748,000
Short-term investments | Fair Value, Measurements, Recurring | Other ABS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	28,000	28,000	219,000
Short-term investments | Fair Value, Measurements, Recurring | Other investments
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	151,086,000	151,086,000	296,571,000
Short-term investments | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	416,103,000	416,103,000	268,900,000
Short-term investments | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	84,823,000	84,823,000
Short-term investments | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Money market instruments
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	331,280,000	331,280,000	268,900,000
Short-term investments | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0
Short-term investments | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Other ABS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring | Other investments
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	201,412,000	201,412,000	349,104,000
Short-term investments | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0
Short-term investments | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	12,470,000	12,470,000	21,819,000
Short-term investments | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Money market instruments
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	33,080,000	33,080,000	30,495,000
Short-term investments | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	4,748,000	4,748,000
Short-term investments | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Other ABS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	28,000	28,000	219,000
Short-term investments | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring | Other investments
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	151,086,000	151,086,000	296,571,000
Short-term investments | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | U.S. government and agencies securities
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0
Short-term investments | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | State and municipal obligations
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Money market instruments
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Corporate bonds and notes
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | CMBS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0
Short-term investments | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Other ABS
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Short-term investments | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring | Other investments
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Other investments | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	3,000,000	3,000,000	3,000,000
Other investments | Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Other investments | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	0	0	0
Other investments | Fair Value, Inputs, Level 3 | Fair Value, Measurements, Recurring
Fair Value by Hierarchy Level [Line Items]
Total Investments at Fair Value	3,000,000	3,000,000	3,000,000
Partnership investment | Investments Measured at NAV
Fair Value by Hierarchy Level [Line Items]
Other Investments	$ 900,000	$ 900,000	$ 2,000,000

Note 5 - Fair Value of Financ_4

Note 5 - Fair Value of Financial Instruments - Other Fair Value Disclosure (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes	$ 1,408,502	$ 1,405,674
FHLB advances	172,649	176,483
Carrying (Reported) Amount, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes	1,408,502	1,405,674
FHLB advances	172,649	176,483
Estimate of Fair Value, Fair Value Disclosure
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes, Fair Value	1,556,285	1,563,503
FHLB advances, Fair Value	$ 174,551	$ 179,578

Note 6 - Investments - Availabl

Note 6 - Investments - Available for Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 5,391,584		$ 5,393,623
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		(948)
Less: loaned securities	135,058		57,499
Fixed-maturity investments available for sale, Total, Fair Value	5,580,212		5,723,340
Fixed-maturities available for sale | U.S. government and agencies securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	256,519		176,033
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	523		1,677
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(1,884)		(3,611)
Available-for-sale Securities, Debt Securities, Including Loaned Securities	255,158		174,099
Fixed-maturities available for sale | State and municipal obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	146,234		149,258
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	15,134		16,113
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(357)		(100)
Available-for-sale Securities, Debt Securities, Including Loaned Securities	161,011		165,271
Fixed-maturities available for sale | Corporate bonds and notes
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	2,892,347		2,832,350
Debt Securities, Available-for-sale, Allowance for Credit Loss	0	$ 0	(948)	$ (2,290)	$ (2,476)	$ 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	155,631		250,771
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(24,981)		(3,758)
Available-for-sale Securities, Debt Securities, Including Loaned Securities	3,022,997		3,078,415
Fixed-maturities available for sale | RMBS
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	695,481		799,814
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	20,925		34,439
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(3,300)		(314)
Available-for-sale Securities, Debt Securities, Including Loaned Securities	713,106		833,939
Fixed-maturities available for sale | CMBS
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	680,503		645,071
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	28,619		39,495
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(2,481)		(3,301)
Available-for-sale Securities, Debt Securities, Including Loaned Securities	706,641		681,265
Fixed-maturities available for sale | CLO
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	558,523		569,173
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,340		2,026
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(543)		(2,641)
Available-for-sale Securities, Debt Securities, Including Loaned Securities	559,320		568,558
Fixed-maturities available for sale | Other ABS
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	193,727		249,988
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,768		2,901
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(476)		(432)
Available-for-sale Securities, Debt Securities, Including Loaned Securities	195,019		252,457
Fixed-maturities available for sale | Foreign government and agency securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	5,107		5,100
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	237		338
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0		0
Available-for-sale Securities, Debt Securities, Including Loaned Securities	5,344		5,438
Fixed-maturities available for sale | Mortgage insurance-linked notes
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	45,384
Debt Securities, Available-for-sale, Allowance for Credit Loss	0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2,307
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0
Available-for-sale Securities, Debt Securities, Including Loaned Securities	47,691
Fixed-maturities available for sale | Total fixed-maturities available for sale
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	5,473,825		5,426,787
Debt Securities, Available-for-sale, Amortized Cost	5,391,584		5,393,623
Debt Securities, Available-for-sale, Allowance for Credit Loss	0		(948)
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	226,484		347,760
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(34,022)		(14,157)
Available-for-sale Securities, Debt Securities, Including Loaned Securities	5,666,287		5,759,442
Fixed-maturity investments available for sale, Total, Fair Value	5,580,212		5,723,340
Fixed-maturities available for sale | Securities Financing Transaction, Cost | Total fixed-maturities available for sale
Debt Securities, Available-for-sale [Line Items]
Less: loaned securities	82,241		33,164
Fixed-maturities available for sale | Securities Financing Transaction, Fair Value | Total fixed-maturities available for sale
Debt Securities, Available-for-sale [Line Items]
Less: loaned securities	$ 86,075		$ 36,102

Note 6 - Investments - Rollforw

Note 6 - Investments - Rollforward of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Securities, Available-for-sale, Allowance for Credit Loss {Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance			$ 948
Debt Securities, Available-for-sale, Allowance for Credit Loss, Ending Balance	$ 0		0
Corporate bonds and notes | Fixed-maturities available for sale
Debt Securities, Available-for-sale, Allowance for Credit Loss {Roll Forward]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	0	$ 2,476	948	$ 0
Current provision for securities without prior allowance	0	0	0	2,596
Net increases (decreases) in allowance on previously impaired securities	0	(186)	(918)	0
Reduction for securities sold	0	0	(30)	(306)
Debt Securities, Available-for-sale, Allowance for Credit Loss, Ending Balance	$ 0	$ 2,290	$ 0	$ 2,290

Note 6 - Investments - Gross Un

Note 6 - Investments - Gross Unrealized Losses and Fair Value of Available for Sale Securities (Details) $ in Thousands	Sep. 30, 2021USD ($)security	Dec. 31, 2020USD ($)security
Continuous Loss Position, Total
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	411	194
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 1,644,089	$ 679,631
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (23,471)	$ (12,101)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	65	36
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 184,506	$ 158,852
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (10,551)	$ (2,056)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	476	230
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 1,828,595	$ 838,483
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (34,022)	$ (14,157)
U.S. government and agencies securities
Continuous Loss Position, Total
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	14	4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 175,339	$ 90,591
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (1,207)	$ (3,611)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	2	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 9,477	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (677)	$ 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	16	4
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 184,816	$ 90,591
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (1,884)	$ (3,611)
State and municipal obligations
Continuous Loss Position, Total
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	15	4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 20,223	$ 9,626
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (254)	$ (100)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	1	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 2,831	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (103)	$ 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	16	4
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 23,054	$ 9,626
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (357)	$ (100)
Corporate bonds and notes
Continuous Loss Position, Total
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	175	60
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 719,649	$ 174,848
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (16,424)	$ (3,758)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	32	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 90,207	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (8,557)	$ 0
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	207	60
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 809,856	$ 174,848
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (24,981)	$ (3,758)
RMBS
Continuous Loss Position, Total
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	36	5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 258,829	$ 42,003
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (3,291)	$ (305)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	2	2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 758	$ 915
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (9)	$ (9)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	38	7
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 259,587	$ 42,918
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (3,300)	$ (314)
CMBS
Continuous Loss Position, Total
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	59	43
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 118,990	$ 118,345
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (1,555)	$ (3,035)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	12	6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 25,224	$ 8,312
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (926)	$ (266)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	71	49
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 144,214	$ 126,657
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (2,481)	$ (3,301)
CLO
Continuous Loss Position, Total
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	68	52
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 251,734	$ 173,459
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (287)	$ (970)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	14	25
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 55,150	$ 137,506
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (256)	$ (1,671)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	82	77
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 306,884	$ 310,965
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (543)	$ (2,641)
Other ABS
Continuous Loss Position, Total
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | security	44	26
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 99,325	$ 70,759
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ (453)	$ (322)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security	2	3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	$ 859	$ 12,119
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (23)	$ (110)
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security	46	29
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 100,184	$ 82,878
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (476)	$ (432)

Note 6 - Investments - Securiti

Note 6 - Investments - Securities Lending Agreements (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Securities Financing Transaction, Fair Value
Securities Financing Transaction [Line Items]
Securities Received as Collateral	$ 97.4	$ 43.3

Note 6 - Investments - Net Gain

Note 6 - Investments - Net Gains (Losses) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Gain (Loss) on Securities [Line Items]
Net realized gains (losses) on investments	$ 14,246	$ 13,973	$ 18,330	$ 32,636
Impairment losses due to intent to sell	0	0	0	(1,401)
Net decrease (increase) in expected credit losses	0	186	918	(2,596)
Net unrealized gain (losses) on investments	(11,342)	2,813	(5,825)	916
Total net gains (losses) on investments	2,904	16,972	13,423	29,555
Fixed-maturities available for sale
Gain (Loss) on Securities [Line Items]
Fixed maturities available for sale, net realized gain (loss)	4,098	13,777	5,684	31,998
Gross investment gains from sales and redemptions	5,874	14,219	19,588	34,422
Gross investment losses from sales and redemptions	(1,776)	(442)	(13,904)	(2,424)
Trading Securities
Gain (Loss) on Securities [Line Items]
Trading securities, net realized gain (loss)	0	0	391	4
Equity securities
Gain (Loss) on Securities [Line Items]
Equity securities, net realized gain (loss)	8,632	0	8,405	361
Other investments
Gain (Loss) on Securities [Line Items]
Other investments, net realized gain (loss)	$ 1,516	$ 196	$ 3,850	$ 273

Note 6 - Investments - Net Chan

Note 6 - Investments - Net Changes in Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Gain (Loss) on Securities [Line Items]
Net changes in unrealized gains (losses) on investments	$ (3,758)	$ 3,132	$ 1,290	$ 1,984
Trading Securities
Gain (Loss) on Securities [Line Items]
Trading Securities, Change in Unrealized Holding Gain (Loss)	(2,659)	(1,150)	(6,011)	9,990
Equity securities
Gain (Loss) on Securities [Line Items]
Equity Securities, Change in Unrealized Holding Gain (Loss)	(1,086)	4,455	6,251	(8,158)
Other investments
Gain (Loss) on Securities [Line Items]
Other Investments, Change in Unrealized Holding Gain (Loss)	$ (13)	$ (173)	$ 1,050	$ 152

Note 6 - Investments - Contract

Note 6 - Investments - Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Available-for-sale Securities, Amortized Cost
Less: loaned securities	$ 135,058	$ 57,499
Fixed-maturities available for sale—at amortized cost	5,391,584	5,393,623
Available-for-sale Securities, Fair Value
Less: loaned securities	135,058	57,499
Fixed-maturity investments available for sale, Total, Fair Value	5,580,212	5,723,340
Fixed-maturities available for sale | Non asset-backed securities
Available-for-sale Securities, Amortized Cost
Due in one year or less	194,384
Due after one year through five years	1,113,491
Due after five years through ten years	1,222,598
Due after ten years	769,734
Available-for-sale Securities, Fair Value
Due in one year or less	195,823
Due after one year through five years	1,159,751
Due after five years through ten years	1,276,635
Due after ten years	812,301
Fixed-maturities available for sale | Asset-backed and other Mortgage Backed securities
Available-for-sale Securities, Amortized Cost
Fixed-maturity investments available for sale, Maturity, without Single Maturity Date, Amortized Cost	2,173,618
Available-for-sale Securities, Fair Value
Fixed-maturity investments available for sale, Maturity, without Single Maturity Date, Fair Value	2,221,777
Fixed-maturities available for sale | Total fixed-maturities available for sale
Available-for-sale Securities, Amortized Cost
Available-for-sale Debt Securities, Amortized Cost Basis, Including Loaned Securities	5,473,825	5,426,787
Fixed-maturities available for sale—at amortized cost	5,391,584	5,393,623
Available-for-sale Securities, Fair Value
Available-for-sale Securities, Debt Securities, Including Loaned Securities	5,666,287	5,759,442
Fixed-maturity investments available for sale, Total, Fair Value	5,580,212	5,723,340
Fixed-maturities available for sale | Securities Financing Transaction, Cost | Total fixed-maturities available for sale
Available-for-sale Securities, Amortized Cost
Less: loaned securities	82,241	33,164
Available-for-sale Securities, Fair Value
Less: loaned securities	82,241	33,164
Fixed-maturities available for sale | Securities Financing Transaction, Fair Value | Total fixed-maturities available for sale
Available-for-sale Securities, Amortized Cost
Less: loaned securities	86,075	36,102
Available-for-sale Securities, Fair Value
Less: loaned securities	$ 86,075	$ 36,102

Note 6 - Investments - Other (D

Note 6 - Investments - Other (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fixed-maturities available for sale | Debt securities
Assets Held by Insurance Regulators	$ 18.2	$ 16.9

Note 7 - Goodwill and Other A_3

Note 7 - Goodwill and Other Acquired Intangible Assets, Net - Schedule of Goodwill (Details) $ in Millions	Sep. 30, 2021USD ($)
homegenius segment
Goodwill [Roll Forward]
Goodwill, Net	$ 9.8

Note 7 - Goodwill and Other A_4

Note 7 - Goodwill and Other Acquired Intangible Assets, Net - Schedule of Other Intangible Assets (Details) - homegenius segment - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Original Acquired Amount	$ 52,298	$ 52,298
Other Intangible Assets, Accumulated Amortization and Impairment	(41,644)	(39,057)
Other Intangible Assets, Net Carrying Amount	10,654	13,241
Client relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Original Acquired Amount	43,550	43,550
Other Intangible Assets, Accumulated Amortization and Impairment	(33,855)	(31,559)
Other Intangible Assets, Net Carrying Amount	9,695	11,991
Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Original Acquired Amount	8,285	8,285
Other Intangible Assets, Accumulated Amortization and Impairment	(7,599)	(7,370)
Other Intangible Assets, Net Carrying Amount	686	915
Licenses
Acquired Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Original Acquired Amount	463	463
Other Intangible Assets, Accumulated Amortization and Impairment	(190)	(128)
Other Intangible Assets, Net Carrying Amount	$ 273	$ 335

Note 8 - Reinsurance - Net Prem

Note 8 - Reinsurance - Net Premiums Written and Earned, Insurance (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Premiums Written, Net [Abstract]
Direct premiums written	$ 253,239	$ 269,240	$ 762,707	$ 820,267
Ceded premiums written	(14,555)	(9,789)	(35,157)	(72,912)
Premiums Earned, Net [Abstract]
Direct premiums earned	277,948	328,729	863,176	945,288
Ceded premiums earned	(30,513)	(45,204)	(93,026)	(141,706)
Ceded Credit Risk [Line Items]
Direct Premiums Written	253,239	269,240	762,707	820,267
Ceded premiums written	14,555	9,789	35,157	72,912
Premiums Written, Net	240,367	262,393	733,146	756,940
Direct premiums earned	277,948	328,729	863,176	945,288
Ceded Premiums Earned	30,513	45,204	93,026	141,706
Net premiums earned (Note 8)	249,118	286,471	775,746	813,181
Ceding commissions earned	7,120	17,038	25,446	40,457
Ceded losses	795	10,189	3,463	51,786
Deferred ceding commissions	40,700		40,700		$ 52,500
Mortgage segment
Premiums Written, Net [Abstract]
Direct premiums written	240,669	266,067	734,993	812,806
Assumed premiums written	1,683	2,942	5,596	9,585
Ceded premiums written	(14,236)	(9,731)	(34,572)	(72,681)
Premiums Earned, Net [Abstract]
Direct premiums earned	265,378	325,556	835,462	937,827
Assumed premiums earned	1,683	2,946	5,596	9,599
Ceded premiums earned	(30,194)	(45,146)	(92,441)	(141,475)
Ceded Credit Risk [Line Items]
Direct Premiums Written	240,669	266,067	734,993	812,806
Assumed premiums written	1,683	2,942	5,596	9,585
Ceded premiums written	14,236	9,731	34,572	72,681
Direct premiums earned	265,378	325,556	835,462	937,827
Assumed premiums earned	1,683	2,946	5,596	9,599
Ceded Premiums Earned	30,194	45,146	92,441	141,475
homegenius segment
Premiums Written, Net [Abstract]
Direct premiums written	12,570	3,173	27,714	7,461
Ceded premiums written	(319)	(58)	(585)	(231)
Premiums Earned, Net [Abstract]
Direct premiums earned	12,570	3,173	27,714	7,461
Ceded premiums earned	(319)	(58)	(585)	(231)
Ceded Credit Risk [Line Items]
Direct Premiums Written	12,570	3,173	27,714	7,461
Ceded premiums written	319	58	585	231
Direct premiums earned	12,570	3,173	27,714	7,461
Ceded Premiums Earned	$ 319	$ 58	$ 585	$ 231

Note 8 - Reinsurance - Single P

Note 8 - Reinsurance - Single Premium QSR Program (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		36 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2017	Dec. 31, 2020
Ceded premiums written	$ 14,555	$ 9,789	$ 35,157	$ 72,912
2020 Single Premium QSR | Radian Guaranty
Ceded premiums written			$ 250,000
Concentration Risk, Percentage			65.00%
Ceded Insurance Commission Percentage			25.00%
Risk In Force	2,046,000		$ 2,046,000			$ 1,597,000
2018 Single Premium QSR | Radian Guaranty
Concentration Risk, Percentage			65.00%
Ceded Insurance Commission Percentage			25.00%
Risk In Force	1,279,000		$ 1,279,000			1,979,000
2016 Single Premium QSR | Radian Guaranty
Concentration Risk, Percentage					35.00%
Ceded Insurance Commission Percentage			25.00%
Risk In Force	$ 2,115,000		$ 2,115,000			$ 3,071,000
2016 Single Premium QSR | Radian Guaranty | 2012-2014 Vintages
Concentration Risk, Percentage			20.00%
Maximum | 2020 Single Premium QSR | Radian Guaranty
Loss Ratio			56.00%
Maximum | 2018 Single Premium QSR | Radian Guaranty
Loss Ratio			56.00%
Maximum | 2016 Single Premium QSR | Radian Guaranty
Concentration Risk, Percentage			65.00%
Loss Ratio			55.00%
Maximum | 2016 Single Premium QSR | Radian Guaranty | 2012-2014 Vintages
Concentration Risk, Percentage			35.00%

Note 8 - Reinsurance - Excess-o

Note 8 - Reinsurance - Excess-of-Loss Program (Details) $ in Thousands	1 Months Ended					9 Months Ended	12 Months Ended
	Apr. 30, 2021USD ($)	Oct. 31, 2020USD ($)	Feb. 29, 2020USD ($)	Apr. 30, 2019USD ($)	Nov. 30, 2018USD ($)	Sep. 30, 2021USD ($)arrangements	Dec. 31, 2020USD ($)
VIE, Non-consolidated, Carrying Amount, Assets						$ 8,041,608	$ 7,948,021
VIE, Non-consolidated, Carrying Amount, Liabilities						$ 3,783,672	3,663,668
Radian Guaranty
Reinsurance Retention Policy, Term of Coverage, Period						10 years
Excess-of-Loss Program | Radian Guaranty
Number of Fully Collateralized Reinsurance Arrangements with the Eagle Re Issuers | arrangements						5
VIE, Non-consolidated, Carrying Amount, Assets						$ 1,852,021	1,539,029
VIE, Non-consolidated, Carrying Amount, Liabilities						1,852,021	1,539,029
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2021-1 (Primary)
Risk In Force	$ 11,061,000					9,999,000	0
Reinsurance Retention Policy, Excess Retention, Amount Reinsured	498,000					498,000	0
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2021-1 (Primary) | Radian Group Inc.
Proceeds from Issuance of Debt	45,400
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2021-1 (Primary) | Variable Interest Entity, Primary Beneficiary
VIE, Non-consolidated, Carrying Amount, Assets						497,735	0
VIE, Non-consolidated, Carrying Amount, Liabilities						497,735	0
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2021-1 (Primary) | XOL First Layer
Reinsurance Retention Policy, Amount Retained	$ 221,000					221,000	0
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2020-2 (Primary)
Risk In Force		$ 13,011,000				8,451,000	11,748,000
Reinsurance Retention Policy, Excess Retention, Amount Reinsured		390,000				206,000	390,000
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2020-2 (Primary) | Variable Interest Entity, Primary Beneficiary
VIE, Non-consolidated, Carrying Amount, Assets						205,581	390,324
VIE, Non-consolidated, Carrying Amount, Liabilities						205,581	390,324
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2020-2 (Primary) | XOL First Layer
Reinsurance Retention Policy, Amount Retained		$ 423,000				423,000	423,000
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2020-1 (Primary)
Risk In Force			$ 9,866,000			3,727,000	6,121,000
Reinsurance Retention Policy, Excess Retention, Amount Reinsured			488,000			488,000	488,000
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2020-1 (Primary) | Variable Interest Entity, Primary Beneficiary
VIE, Non-consolidated, Carrying Amount, Assets						488,385	488,385
VIE, Non-consolidated, Carrying Amount, Liabilities						488,385	488,385
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2020-1 (Primary) | XOL First Layer
Reinsurance Retention Policy, Amount Retained			$ 202,000			202,000	202,000
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2019-1 (Primary)
Risk In Force				$ 10,705,000		2,787,000	4,657,000
Reinsurance Retention Policy, Excess Retention, Amount Reinsured				562,000		385,000	385,000
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2019-1 (Primary) | Variable Interest Entity, Primary Beneficiary
VIE, Non-consolidated, Carrying Amount, Assets						384,602	384,602
VIE, Non-consolidated, Carrying Amount, Liabilities						384,602	384,602
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2019-1 (Primary) | XOL First Layer
Reinsurance Retention Policy, Amount Retained				$ 268,000		264,000	265,000
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2018-1 (Primary)
Risk In Force					$ 9,109,000	2,415,000	3,986,000
Reinsurance Retention Policy, Excess Retention, Amount Reinsured					434,000	276,000	276,000
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2018-1 (Primary) | Variable Interest Entity, Primary Beneficiary
VIE, Non-consolidated, Carrying Amount, Assets						275,718	275,718
VIE, Non-consolidated, Carrying Amount, Liabilities						275,718	275,718
Excess-of-Loss Program | Radian Guaranty | Eagle Re 2018-1 (Primary) | XOL First Layer
Reinsurance Retention Policy, Amount Retained					205,000	$ 201,000	$ 201,000
Excess-of-Loss Program | Radian Guaranty | Separate Third-Party Reinsurer
Reinsurance Retention Policy, Excess Retention, Amount Reinsured					$ 21,400

Note 8 - Reinsurance - Other Co

Note 8 - Reinsurance - Other Collateral (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Radian Guaranty
Funds Held under Reinsurance Agreements, Asset	$ 172.6	$ 228.6

Note 9 - Other Assets - Compone

Note 9 - Other Assets - Components of Other Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Prepaid federal income taxes (Note 10)		$ 313,123	$ 210,889
Prepaid Reinsurance Premiums		209,769	267,638
Loaned securities (Note 5)		135,058	57,499
Company-owned life insurance		112,503	115,586
Right-of-use assets (Note 13)		32,690	32,985
Other		35,918	30,488
Other Assets		839,061	$ 715,085
Impairment of Leasehold	$ 3,500
Corporate headquarters
Right-of-use assets (Note 13)		$ 27,400

Note 10 - Income Taxes - Income

Note 10 - Income Taxes - Income Tax (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
US Treasury Securities
Operating Loss Carryforwards [Line Items]
Debt Securities	$ 313.1	$ 210.9
Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Income Taxes Payable, Federal, Current	25.2	$ 17.5
State and Local NOL Carryforwards
Operating Loss Carryforwards [Line Items]
Valuation Allowance, Amount	$ 84.7

Note 11 - Losses and LAE - Mort

Note 11 - Losses and LAE - Mortgage Insurance Reserve for Losses and LAE Rollforward (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Loss reserve [Roll Forward]
Balance at beginning of period	$ 848,413
Deduct paid claims and LAE related to [Abstract]
Balance at end of period	893,155
Mortgage segment
Loss reserve [Roll Forward]
Balance at beginning of period	844,107	$ 401,273
Less: Reinsurance recoverables	71,769	14,594
Balance at beginning of period, net of reinsurance recoverables	772,338	386,679
Add losses and LAE incurred in respect of default notices reported and unreported in [Abstract]
Incurred Losses and LAE Current year	119,823	448,584
Incurred Losses and LAE Prior years	(53,947)	(21,494)
Total incurred losses and LAE	65,876	427,090
Deduct paid claims and LAE related to [Abstract]
Paid Losses and LAE Current year	499	2,841
Paid losses and LAE Prior years	24,431	54,167
Total paid losses and LAE	24,930	57,008
Balance at end of period, net of reinsurance recoverables	813,284	756,761
Add: Reinsurance recoverables	74,737	64,947
Balance at end of period	$ 888,021	$ 821,708

Note 11 - Losses and LAE - Re_2

Note 11 - Losses and LAE - Reserve Activity (Details) - Primary Mortgage Product - Mortgage segment	9 Months Ended
	Sep. 30, 2021	Apr. 30, 2021
Decrease in Number of New Primary Default Notices	(70.00%)
Default To Claim Rate Estimate, Gross, For New Defaults	8.00%	8.50%

Note 12 - Borrowings and Fina_3

Note 12 - Borrowings and Financing Activities - Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Advances from Federal Home Loan Banks	$ 172,649	$ 176,483
Senior Notes
Debt Instrument [Line Items]
Senior Notes	1,408,502	1,405,674
Senior Notes | Senior Notes Due 2024
Debt Instrument [Line Items]
Senior Notes	446,346	445,512
Senior Notes | Senior Notes Due 2025
Debt Instrument [Line Items]
Senior Notes	517,950	516,634
Senior Notes | Senior Notes Due 2027
Debt Instrument [Line Items]
Senior Notes	444,206	443,528
FHLB Advances
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	31,667
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	61,050	67,500
Long-term Debt, Maturities, Repayments of Principal in Year Two	52,994	61,050
Long-term Debt, Maturities, Repayments of Principal in Year Three	13,954	27,995
Long-term Debt, Maturities, Repayments of Principal in Year Four	9,984	9,954
Long-term Debt, Maturities, Repayments of Principal in Year Five	3,000	9,984
Long-term Debt, Maturities, Repayments of Principal after Year Five		0
Advances from Federal Home Loan Banks	$ 172,649	$ 176,483

Note 12 - Borrowings and Fina_4

Note 12 - Borrowings and Financing Activities - FHLB Advances (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
FHLB advances	$ 172,649	$ 176,483
Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate	90 days
FHLB Advances
FHLB advances	$ 172,649	176,483
Federal Home Loan Bank, Advances, Weighted Average Interest Rate	0.87%
Minimum | FHLB Advances
Federal Home Loan Bank, Ratio of Market Value of Collateral to Advances	1.03
Maximum | FHLB Advances
Federal Home Loan Bank, Ratio of Market Value of Collateral to Advances	1.14
Fixed maturities AFS and trading securities | Debt securities
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged	$ 199,500	$ 188,000

Note 12 - Borrowings and Fina_5

Note 12 - Borrowings and Financing Activities - Revolving Credit Facility (Details) - Revolving Credit Facility $ in Millions	Sep. 30, 2021USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 267.5
Line of Credit Facility, Fair Value of Amount Outstanding	$ 0

Note 13 - Commitments and Con_2

Note 13 - Commitments and Contingencies - Legal Proceedings (Details)	9 Months Ended
	Sep. 30, 2021matter
Unasserted Claim | Minimum
Loss Contingencies [Line Items]
Minimum Number of Pending or Threatened Matters That Could Affect Our Results	1
Insurance Claims | Total primary reserves
Loss Contingencies [Line Items]
Loss Contingency, Legal Actions Commencement, Period	2 years
Insurance Claims | Pool Insurance Mortgage Insurance Product
Loss Contingencies [Line Items]
Loss Contingency, Legal Actions Commencement, Period	3 years

Note 13 - Commitments and Con_3

Note 13 - Commitments and Contingencies - Lease Liability (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Liabilities
Other Commitments [Line Items]
Operating Lease, Liability	$ 54,300	$ 53,400

Note 14 - Capital Stock - Share

Note 14 - Capital Stock - Share Repurchase Activity (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 31, 2021	Sep. 30, 2021	Sep. 30, 2021	Aug. 31, 2021	Aug. 14, 2019
3Q19 Repurchase Program
Capital Stock [Line Items]
Stock Repurchase Program, Authorized Amount					$ 200
3Q21 Repurchase Program
Capital Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 200
Total of 3Q19, 1Q20, and 3Q21 Repurchase Programs
Capital Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 675
Stock Repurchased During Period, Shares		7,100,000	11,400,000
Accelerated Share Repurchases, Final Price Paid Per Share		$ 22.44	$ 22.62
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 142	$ 142
Total of 3Q19, 1Q20, and 3Q21 Repurchase Programs | Subsequent Event
Capital Stock [Line Items]
Stock Repurchased During Period, Shares	2,000,000
Accelerated Share Repurchases, Final Price Paid Per Share	$ 23.72
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 95.5

Note 14 - Capital Stock - Divid

Note 14 - Capital Stock - Dividends and Dividend Equivalents (Details) - $ / shares	May 04, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Equity [Abstract]
Common Stock, Dividends, Per Share, Declared	$ 0.14	$ 0.125	$ 0.125	$ 0.125	$ 0.125	$ 0.125
Capital Stock [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.14	$ 0.125	$ 0.125	$ 0.125	$ 0.125	$ 0.125

Note 14 - Capital Stock - Sha_2

Note 14 - Capital Stock - Share-based and Other Compensation Programs (Details)	3 Months Ended	9 Months Ended
	Jun. 30, 2021anniversary	Sep. 30, 2021$ / sharesshares	Dec. 31, 2020$ / sharesshares
Performance Based RSUs Equity Settled
Capital Stock [Line Items]
Number of Shares, Unvested | shares		2,345,742	2,186,244
Weighted Average Grant Date Fair Value, Unvested | $ / shares		$ 16.76	$ 15.71
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares		578,790
Weighted Average Grant Date Fair Value, Granted | $ / shares		$ 20.39
Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment to Shares | shares		421,357
Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment to Shares, Weighted Average Grant Date Fair Value | $ / shares		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period | shares		(811,578)
Weighted Average Grant Date Fair Value, Vested | $ / shares		$ 15.98
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares		(29,071)
Weighted Average Grant Date Fair Value, Forfeited | $ / shares		$ 18.12
Performance Based RSUs Equity Settled | 2021 Award Year
Capital Stock [Line Items]
Performance Period, Performance-based RSUs	3 years
Payout Percentage of Target Award	200.00%
Performance Based RSUs Equity Settled | Minimum
Capital Stock [Line Items]
Payout Percentage of Target Award		0.00%
Performance Based RSUs Equity Settled | Minimum | 2021 Award Year
Capital Stock [Line Items]
Cliff-Vesting Period	1 year
Timed-Vested RSUs Equity Settled
Capital Stock [Line Items]
Number of Shares, Unvested | shares		2,146,162	2,118,885
Weighted Average Grant Date Fair Value, Unvested | $ / shares		$ 14.53	$ 13.16
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | shares		511,166
Weighted Average Grant Date Fair Value, Granted | $ / shares		$ 21.63
Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment to Shares | shares		0
Share-based Compensation Arrangement by Share-based Payment Award, Performance Adjustment to Shares, Weighted Average Grant Date Fair Value | $ / shares		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period | shares		(456,790)
Weighted Average Grant Date Fair Value, Vested | $ / shares		$ 15.95
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | shares		(27,099)
Weighted Average Grant Date Fair Value, Forfeited | $ / shares		$ 17.67
Timed-Vested RSUs Equity Settled | 2021 Award Year
Capital Stock [Line Items]
Number of Anniversaries of the Grant Date | anniversary	3
Timed-Vested RSUs Equity Settled | Minimum | 2021 Award Year
Capital Stock [Line Items]
Cliff-Vesting Period	1 year

Note 16 - Statutory Informati_3

Note 16 - Statutory Information - Statutory Information (Details) $ in Thousands	Sep. 22, 2021USD ($)	Sep. 30, 2021USD ($)state	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Statutory Accounting Practices [Line Items]
Risk To Capital Ratio, Regulatory Maximum		25
State Insurance Regulations
Statutory Accounting Practices [Line Items]
Number Of States That Have A Statutory Or Regulatory Risk Based Capital Requirement | state		16
Radian Guaranty
Statutory Accounting Practices [Line Items]
Statutory Net Income (Loss)		$ 516,866	$ 260,175
Statutory Accounting Practices, Statutory Capital and Surplus, Balance		646,923		$ 481,484
Statutory Accounting Practices, Contingency Reserve		$ 3,800,000
Risk To Capital Ratio		11.4		12.7
Radian Reinsurance
Statutory Accounting Practices [Line Items]
Statutory Net Income (Loss)		$ 8,765	30,358
Statutory Accounting Practices, Statutory Capital and Surplus, Balance		328,430		$ 360,704
Return of capital	$ 36,000
Other MI Companies
Statutory Accounting Practices [Line Items]
Statutory Net Income (Loss)		777	929
Statutory Accounting Practices, Statutory Capital and Surplus, Balance		42,715		41,327
Radian Title Insurance
Statutory Accounting Practices [Line Items]
Statutory Net Income (Loss)		4,777	$ 1,399
Statutory Accounting Practices, Statutory Capital and Surplus, Balance		34,342		$ 28,849
Consolidated insurance subsidiaries
Statutory Accounting Practices [Line Items]
Restricted Net Assets Held by Consolidated Subsidiaries		$ 4,600,000