0000876437-23-000025 | 10-Q | XBRL Viewer

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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2023	Apr. 28, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	1-10816
Entity Registrant Name	MGIC Investment Corp
Entity Incorporation, State or Country Code	WI
Entity Tax Identification Number	39-1486475
Entity Address, Address Line One	250 E. Kilbourn Avenue
Entity Address, City or Town	Milwaukee,
Entity Address, State or Province	WI
Entity Address, Postal Zip Code	53202
City Area Code	(414)
Local Phone Number	347-6480
Title of each class	Common stock
Trading Symbol	MTG
Security Exchange Name	NYSE
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		286,617,757
Entity Central Index Key	0000876437
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investment portfolio:
Fixed income, available-for-sale, at fair value (amortized cost 2023 - $5,979,045; 2022 - $5,926,785)	$ 5,564,053	$ 5,409,698
Equity securities, at fair value (cost 2023 - $15,946; 2022 - $15,924)	14,523	14,140
Other invested assets, at cost	850	850
Total investment portfolio	5,579,426	5,424,688
Cash and cash equivalents	358,214	327,384
Restricted cash and cash equivalents	8,358	5,529
Accrued investment income	54,550	55,178
Reinsurance recoverable on loss reserves	32,761	28,240
Reinsurance recoverable on paid losses	145	18,081
Premiums receivable	57,375	58,000
Home office and equipment, net	40,580	41,419
Deferred insurance policy acquisition costs	18,097	19,062
Deferred income taxes, net	100,174	124,769
Other assets	102,608	111,443
Total assets	6,352,288	6,213,793
Liabilities:
Loss reserves	558,515	557,988
Unearned premiums	183,467	195,289
Senior notes	642,092	641,724
Convertible junior subordinated debentures	21,086	21,086
Other liabilities	169,484	154,966
Total liabilities	1,574,644	1,571,053
Contingencies
Shareholders’ equity:
Common stock	371,353	371,353
Paid-in capital	1,791,609	1,798,842
Treasury stock at cost	(1,119,048)	(1,050,238)
Accumulated other comprehensive income (loss), net of tax	(395,499)	(481,511)
Retained earnings	4,129,229	4,004,294
Total shareholders’ equity	4,777,644	4,642,740
Total liabilities and shareholders’ equity	$ 6,352,288	$ 6,213,793

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Fixed maturities, amortized cost	$ 5,979,045	$ 5,926,785
Cost	$ 15,946	$ 15,924
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	371,353,000	371,353,000
Common stock, shares outstanding (in shares)	288,366,000	293,433,000
Treasury stock, shares at cost (in shares)	82,987,000	77,920,000

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Premiums written:
Direct	$ 274,247	$ 274,793
Assumed	2,751	2,031
Ceded	(46,806)	(34,159)
Net premiums written	230,192	242,665
Decrease in unearned premiums, net	11,823	12,575
Net premiums earned	242,015	255,240
Investment income, net of expenses	49,223	38,262
Net gains (losses) on investments and other financial instruments	(7,698)	(772)
Other revenue	425	1,886
Total revenues	283,965	294,616
Losses and expenses:
Losses incurred, net	6,446	(19,314)
Amortization of deferred policy acquisition costs	2,478	2,740
Other underwriting and operating expenses, net	70,063	54,732
Loss on debt extinguishment	0	22,107
Interest expense	9,374	14,912
Total losses and expenses	88,361	75,177
Income before tax	195,604	219,439
Provision for income tax	41,057	44,426
Net income	$ 154,547	$ 175,013
Earnings per share:
Basic (in dollars per share)	$ 0.53	$ 0.55
Diluted (in dollars per share)	$ 0.53	$ 0.54
Weighted average common shares outstanding - basic (in shares)	290,989	315,975
Weighted average common shares outstanding - diluted (in shares)	294,712	324,538

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 154,547	$ 175,013
Other comprehensive income (loss), net of tax:
Change in unrealized investment gains and losses	80,659	(270,938)
Benefit plan adjustments	5,353	393
Other comprehensive income (loss), net of tax	86,012	(270,545)
Comprehensive income (loss)	$ 240,559	$ (95,532)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Paid-in capital	Treasury stock	Accumulated other comprehensive income (loss)	Retained earnings
Balance, beginning of period at Dec. 31, 2021		$ 371,353	$ 1,794,906	$ (675,265)	$ 119,697	$ 3,250,691
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(17,867)	9,179
Equity compensation			6,572
Repurchase of common stock				(127,610)
Other comprehensive income (loss), net of tax	$ (270,545)				(270,545)
Net income	175,013					175,013
Cash dividends						(25,769)
Balance, end of period at Mar. 31, 2022	4,610,355	371,353	1,783,611	(793,696)	(150,848)	3,399,935
Balance, beginning of period at Dec. 31, 2022	4,642,740	371,353	1,798,842	(1,050,238)	(481,511)	4,004,294
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reissuance of treasury stock, net under share-based compensation plans			(16,912)	9,713
Equity compensation			9,679
Repurchase of common stock				(78,523)
Other comprehensive income (loss), net of tax	86,012				86,012
Net income	154,547					154,547
Cash dividends	(29,600)					(29,612)
Balance, end of period at Mar. 31, 2023	$ 4,777,644	$ 371,353	$ 1,791,609	$ (1,119,048)	$ (395,499)	$ 4,129,229

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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+ Details

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 154,547	$ 175,013
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,192	15,395
Deferred tax expense	1,732	5,945
Equity compensation	9,679	6,572
Loss on debt extinguishment	0	22,107
Net (gains) losses on investments and other financial instruments	7,698	772
Change in certain assets and liabilities:
Accrued investment income	628	1,502
Reinsurance recoverable on loss reserves	(4,521)	2,188
Reinsurance recoverable on paid losses	17,936	36,072
Premium receivable	625	(798)
Deferred insurance policy acquisition costs	965	133
Profit commission receivable	9,324	6,779
Loss reserves	527	(32,250)
Unearned premiums	(11,822)	(12,575)
Return premium accrual	(1,300)	(900)
Current income taxes	39,481	38,445
Other, net	(23,405)	(36,389)
Net cash provided by (used in) operating activities	212,286	228,011
Cash flows from investing activities:
Purchases of investments	(229,198)	(94,017)
Proceeds from sales of investments	32,991	218,373
Proceeds from maturity of fixed income securities	131,389	225,972
Additions to property and equipment	(363)	(888)
Net cash provided by (used in) investing activities	(65,181)	349,440
Cash flows from financing activities:
Purchase of convertible junior subordinated debentures	0	(56,965)
Repayment of FHLB Advance	0	(155,000)
Cash portion of loss on debt extinguishment	0	(22,107)
Repurchase of common stock	(76,151)	(123,640)
Dividends paid	(30,096)	(26,112)
Payment of withholding taxes related to share-based compensation net share settlement	(7,199)	(8,688)
Net cash provided by (used in) financing activities	(113,446)	(392,512)
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents	33,659	184,939
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	332,913	304,958
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 366,572	$ 489,897

Nature of Business and Basis of Presentation	3 Months Ended
Nature of Business and Basis of Presentation	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business and Basis of Presentation	Nature of Business and Basis of Presentation MGIC Investment Corporation is a holding company which, through Mortgage Guaranty Insurance Corporation (“MGIC”), is principally engaged in the mortgage insurance business. We provide mortgage insurance to lenders throughout the United States and to government sponsored entities to protect against loss from defaults on low down payment residential mortgage loans. MGIC Assurance Corporation (“MAC”) and MGIC Indemnity Corporation (“MIC”), insurance subsidiaries of MGIC, provide insurance for certain mortgages under Fannie Mae and Freddie Mac (the “GSEs”) credit risk transfer programs. The accompanying unaudited consolidated financial statements of MGIC Investment Corporation and its wholly-owned subsidiaries have been prepared in accordance with the instructions to Form 10-Q as prescribed by the Securities and Exchange Commission (“SEC”) for interim reporting and do not include all of the other information and disclosures required by accounting principles generally accepted in the United States of America (“GAAP”). These statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended December 31, 2022 included in our 2022 Annual Report on Form 10-K. As used below, “we,” “our” and “us” refer to MGIC Investment Corporation’s consolidated operations or to MGIC Investment Corporation, as the context requires. In the opinion of management, the accompanying financial statements include all adjustments, consisting primarily of normal recurring accruals, necessary to fairly state our consolidated financial position and consolidated results of operations for the periods indicated. The consolidated results of operations for an interim period are not necessarily indicative of the results that may be expected for the year ending December 31, 2023. The substantial majority of our NIW has been for loans purchased by the GSEs. The current private mortgage insurer eligibility requirements ("PMIERs") of the GSEs include financial requirements, as well as business, quality control and certain transactional approval requirements. The financial requirements of the PMIERs require a mortgage insurer’s "Available Assets" (generally only the most liquid assets of an insurer) to equal or exceed its "Minimum Required Assets" (which are based on an insurer's book of risk in force, calculated from tables of factors with several risk dimensions). Based on our application of the PMIERs, as of March 31, 2023, MGIC’s Available Assets are in excess of its Minimum Required Assets; and MGIC is in compliance with the PMIERs and eligible to insure loans purchased by the GSEs. Reclassifications Certain prior period amounts have been reclassified to conform to the current year presentation. Subsequent events We have considered subsequent events through the date of this filing.

Significant Accounting Policies	3 Months Ended
Significant Accounting Policies	Mar. 31, 2023
Accounting Standards Update and Change in Accounting Principle [Abstract]
Significant Accounting Policies	Significant Accounting Policies Recent accounting and reporting developments Accounting standards effective in 2023, or early adopted, and relevant to our financial statements are described below: Reference Rate Reform: ASU 2022-06 In March 2020, the FASB issued ASU 2020-04 to provide temporary optional guidance to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform. It provided optional expedients and exceptions for applying generally accepted accounting principles to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. In December 2022, the FASB issued ASU 2022-06, extending the election and application from March 12, 2020 through December 31, 2024 (originally December 31, 2022). The adoption of, and future elections under, this standard are not expected to have a material impact on our consolidated financial statements as the standard will ease, if warranted, the requirements for accounting for the future effects of reference rate reform. We continue to monitor the impact the discontinuance of LIBOR or other reference rates will have on our contracts and other transactions. Inflation Reduction Act On August 16, 2022, the Inflation Reduction Act (the “IRA”) was enacted and signed into law in the United States. The IRA includes provisions for a 15% corporate minimum tax and a 1% excise tax on net stock repurchases. Both of these taxes are effective in 2023. We do not expect these tax provisions to have a material impact on our consolidated financial results, including our annual estimated effective tax rate. The amount of the excise tax on the repurchase of corporate stock was immaterial in the first quarter of 2023.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

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+ Details

Debt

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Debt

Debt obligations

The aggregate carrying values of our long-term debt obligations and their par values, if different, as of March 31, 2023 and December 31, 2022 are presented in table 3.1 below.


Long-term debt obligations
Table	3.1
(In millions)		March 31, 2023		December 31, 2022
5.25% Notes, due August 2028 (par value: $650 million)		$	642.1	$	641.7
9% Debentures, due April 2063 (1)		21.1		21.1
Long-term debt, carrying value		$	663.2	$	662.8

(1)Convertible at any time prior to maturity at the holder’s option, at a conversion rate, which is subject to adjustment, of 77.9620 shares per $1,000 principal amount, representing a conversion price of approximately $12.83 per share. The payment of dividends by our holding company results in adjustments to the conversion rate, with such adjustments generally deferred until the end of the year.

The 5.25% Senior Notes (5.25% Notes) and 9% Convertible Junior Subordinated Debentures (“9% Debentures”) are obligations of our holding company, MGIC Investment Corporation.

See Note 7 - “Debt” in our Annual Report on Form 10-K for the year ended December 31, 2022 for additional information pertaining to our debt obligations. As of March 31, 2023 we are in compliance with all of our debt covenants.

Interest payments

Interest payments for the three months ended March 31, 2023 and 2022 were $17.1 million and $26.7 million, respectively.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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+ Details

Reinsurance

3 Months Ended

Mar. 31, 2023

Reinsurance Disclosures [Abstract]

Reinsurance

The reinsurance agreements to which we are a party, are discussed below. The effect of all of our reinsurance agreements on premiums earned and losses incurred is shown in table 4.1 below.


Reinsurance
Table	4.1
		Three Months Ended March 31,
(In thousands)		2023		2022
Premiums earned:
Direct		$	286,034	$	287,273
Assumed		2,787		2,126
Ceded - quota share reinsurance (1)		(29,877)		(22,378)

Ceded - excess-of-loss reinsurance		(16,929)		(11,781)
Total ceded		(46,806)		(34,159)
Net premiums earned		$	242,015	$	255,240

Losses incurred:
Direct		$	11,123	$	(21,092)
Assumed		4		(207)
Ceded - quota share reinsurance		(4,681)		1,985
Losses incurred, net		$	6,446	$	(19,314)

Other Reinsurance Impacts:
Profit commission on quota share reinsurance (1)		$	31,711	$	38,980
Ceding commission on quota share reinsurance		12,318		12,272

(1)Ceded premiums earned are shown net of profit commission.

Quota share reinsurance

We have entered into quota share reinsurance ("QSR") transactions with panels of third-party reinsurers to cede a fixed quota share percentage of premiums earned and received and losses incurred on insurance covered by the transactions. We receive the benefit of a ceding commission equal to 20% of premiums ceded before profit commission. We also receive the benefit of a profit commission through a reduction of premiums we cede. The profit commission varies inversely with the level of losses on a “dollar for dollar” basis and can be eliminated at annual loss ratios higher than we have experienced on our QSR Transactions.

Each of our QSR Transactions typically have annual loss ratio caps of 300% and lifetime loss ratios of 200%.

Table 4.2 below provides additional detail regarding our QSR Transactions.


Quota Share Reinsurance
Table	4.2

Quota Share Contract		Covered Policy Years	Quota Share %		Annual Loss Ratio to Exhaust Profit Commission (1)		Contractual Termination Date
2020 QSR		2020	12.5	%	62.0	%	December 31, 2031
2020 QSR and 2021 QSR		2020	17.5	%	62.0	%	December 31, 2032
2020 QSR and 2021 QSR		2021	17.5	%	61.9	%	December 31, 2032
2021 QSR and 2022 QSR		2021	12.5	%	57.5	%	December 31, 2032
2021 QSR and 2022 QSR		2022	15.0	%	57.5	%	December 31, 2033
2022 QSR and 2023 QSR		2022	15.0	%	62.0	%	December 31, 2033
2022 QSR and 2023 QSR		2023	15.0	%	62.0	%	December 31, 2034
2023 QSR		2023	10.0	%	58.5	%	December 31, 2034
Credit Union QSR		2020-2025	65.0	%	50.0	%	December 31, 2039

(1) We will receive a profit commission provided the annual loss ratio on policies covered under the transaction remains below this ratio.

We can elect to terminate the QSR Transactions under specified scenarios without penalty upon prior written notice, including if we will receive less than 90% (80% for the Credit Union QSR Transaction) of the full credit amount under the PMIERs, full financial statement credit or full credit under applicable regulatory capital requirements for the risk ceded in any required calculation period.

Table 4.3 provides additional detail regarding optional termination dates and optional reductions to our quota share percentage which can, in each case, be elected by us for a fee. Under the optional reduction to the quota share percentage, we may reduce our quota share percentage from the original percentage shown in table 4.2 to the percentage shown in table 4.3.

Quota Share Reinsurance

Table

4.3

Quota Share Contract

Covered Policy Years

Optional Termination Date (1)

Optional Quota Share % Reduction Date (2)

Optional Reduced Quota Share %

2020 QSR

2020

June 30, 2023

January 1, 2023

10.5% or 8%

2020 QSR and 2021 QSR

2020

June 30, 2023

January 1, 2023

14.5% or 12%

2020 QSR and 2021 QSR

2021

December 31, 2023

January 1, 2023

14.5% or 12%

2021 QSR and 2022 QSR

2021

December 31, 2023

January 1, 2023

10.5% or 8%

2021 QSR and 2022 QSR

2022

December 31, 2024

July 1, 2023

12.5% or 10%

2022 QSR and 2023 QSR

2022

December 31, 2024

July 1, 2023

12.5% or 10%

2022 QSR and 2023 QSR

2023

December 31, 2025

July 1, 2024

12.5% or 10%

2023 QSR

2023

December 31, 2025

July 1, 2024

8% or 7%

(1) We can elect early termination of the QSR Transaction beginning on this date, and semi-annually thereafter.

(2) We can elect to reduce the quota share percentage beginning on this date, and semi-annually thereafter.

Under the terms of our QSR Transactions, ceded premiums earned, ceding commissions, profit commission, and ceded paid loss and LAE are settled net on a quarterly basis. The ceded premiums earned due after deducting the related ceding commission and profit commission is reported within Other liabilities on the consolidated balance sheets.

The reinsurance recoverable on loss reserves related to our QSR Transactions was $32.8 million as of March 31, 2023 and $28.2 million as of December 31, 2022. The reinsurance recoverable balance is secured by funds on deposit from reinsurers, the minimum amount of which is based on the greater of 1) a reinsurer's funding requirements under PMIERs or 2) ceded reserves and unpaid losses. Each of the reinsurers under our quota share reinsurance agreements described above has an insurer financial strength rating of A- or better (or a comparable rating) by Standard and Poor's Rating Services, A.M. Best, Moody's, or a combination of the three.

Excess of loss reinsurance

We have Excess-of-loss transactions (“XOL Transactions”) with a panel of unaffiliated reinsurers executed through the traditional reinsurance market (“Traditional XOL Transaction”) and with unaffiliated special purpose insurers (“Home Re Transactions”).

The 2022 Traditional XOL Transaction provides reinsurance coverage on eligible NIW in 2022. For the covered policies, we retain the first layer of the aggregate losses paid, and the reinsurers will then provide second layer coverage up to the outstanding reinsurance coverage amount. We retain losses paid in excess of the outstanding reinsurance coverage amount. The reinsurance coverage is subject to adjustment based on the risk characteristics of the covered loans.

We can elect to terminate our Traditional XOL Transaction under specified scenarios without penalty upon prior written notice, including if we will receive less than the full credit amount under the PMIERs, full financial statement credit or full credit under applicable regulatory capital requirements for the risk ceded in any required calculation period. The reinsurance premiums ceded to the Traditional XOL Transaction are based off the remaining reinsurance coverage levels. The reinsured coverage levels are secured by funds on deposit from reinsurers, the minimum amount of which is based on the greater of 1) a reinsurer's funding requirements under PMIERs or 2) ceded reserves and unpaid losses.

The Home Re Transactions are executed with unaffiliated special purpose insurers (“Home Re Entities”). For the reinsurance coverage periods, we retain the first layer of the respective aggregate losses paid, and a Home Re Entity will then provide second layer coverage up to the outstanding reinsurance coverage amount. We retain losses paid in excess of the outstanding reinsurance coverage amount. Subject to certain conditions, the reinsurance coverage decreases over a period of either 10 or 12.5 years, depending on the transaction, as the underlying covered mortgages amortize or are repaid, or mortgage insurance losses are paid.

The Home Re Entities financed the collateral for the coverages by issuing mortgage insurance-linked notes (“ILNs”) to unaffiliated investors in an aggregate amount equal to the initial reinsurance coverage amounts. Each ILN is non-recourse to any assets of MGIC or affiliates. The proceeds of the ILNs, which were deposited into reinsurance trusts for the benefit of MGIC, will be the source of reinsurance claim payments to MGIC and principal repayments on the ILNs.

Payment of principal on the related insurance-linked notes will be suspended and the reinsurance coverage available to MGIC under the transactions will not be reduced by such principal payments until a target level of credit enhancement is obtained or if certain thresholds or “Trigger Events” are reached, as defined in the related insurance-linked notes transaction agreement. As of March 31, 2023 a "Trigger Event" has occurred on our Home Re 2019-1 ILN transaction because the reinsured principal balance of loans that were reported 60 or more days delinquent exceeded a percentage of the total reinsured principal balance of loans specified under each transaction. A "Trigger Event" has also occurred on the Home Re 2022-1 ILN transactions because the target level of credit enhancement on the most senior tranche has not been met.

Tables 4.4a and 4.4b provide a summary of our XOL Transactions as of March 31, 2023 and December 31, 2022.

Excess of Loss Reinsurance

4.4a

($ in thousands)

Issue Date

Policy In force Dates

Optional Call Date (1)

Legal Maturity

Initial First Layer Retention

Initial Excess of Loss Reinsurance Coverage

2022 Traditional XOL

April 1, 2022

January 1, 2022 - December 30, 2022

January 1, 2030

10 years

$82,523

$142,642

Home Re 2022-1, Ltd.

April 26, 2022

May 29, 2021 - December 31, 2021

April 25, 2028

12.5 years

$325,589

$473,575

Home Re 2021-2, Ltd.

August 3, 2021

January 1, 2021 - May 28, 2021

July 25, 2028

12.5 years

190,159

398,429

Home Re 2021-1, Ltd.

February 2, 2021

August 1, 2020 - December 31, 2020

January 25, 2028

12.5 years

211,159

398,848

Home Re 2020-1, Ltd.

October 29, 2020

January 1, 2020 - July 31, 2020

October 25, 2027

10 years

275,283

412,917

Home Re 2019-1, Ltd.

May 25, 2019

January 1, 2018 - March 31, 2019

May 25, 2026

10 years

185,730

315,739

Home Re 2018-1, Ltd.

October 30, 2018

July 1, 2016 - December 31, 2017

October 25, 2025

10 years

168,691

318,636

(1) We have the right to terminate the Home Re Transactions under certain circumstances and on any payment date on or after the respective Optional Call Date. We can elect early termination of the Traditional XOL Transaction beginning on this date, and quarterly thereafter.



4.4b	Remaining First Layer Retention				Remaining Excess of Loss Reinsurance Coverage
($ in thousands)	March 31, 2023		December 31, 2022		March 31, 2023		December 31, 2022
2022 Traditional XOL	$	82,509	$	82,517	$	142,642	$	142,642
Home Re 2022-1, Ltd.	$	325,520	325,576		$	473,575	473,575
Home Re 2021-2, Ltd.	190,016		190,097		327,346		352,084
Home Re 2021-1, Ltd.	211,055		211,102		251,942		277,053
Home Re 2020-1, Ltd.	274,979		274,871		92,648		113,247
Home Re 2019-1, Ltd.	183,351		183,540		208,146		208,146
Home Re 2018-1, Ltd.	164,708		164,849		121,513		140,993

The reinsurance premiums ceded to each Home Re Entity are composed of coverage, initial expense and supplemental premiums. The coverage premiums are generally calculated as the difference between the amount of interest payable by the Home Re Entity on the remaining reinsurance coverage levels, and the investment income collected on the collateral assets held in a reinsurance trust account and used to collateralize the Home Re Entity’s reinsurance obligation to MGIC. The amount of monthly reinsurance coverage premium ceded on the Home Re Transactions will fluctuate due to changes in the reference rate and changes in money market rates that affect investment income collected on the assets in the reinsurance trust. The Home Re 2021-2 and Home Re 2022-1 Transactions reference SOFR, while the remaining Home Re Transactions reference one-month LIBOR. As a result, we concluded that each Home Re Transaction contains an embedded derivative that is accounted for separately as a freestanding derivative. The fair values of the derivatives at March 31, 2023 and December 31, 2022, were not material to our consolidated balance sheet and the changes in fair value during the three months ended March 31, 2023 and March 31, 2022 were not material to our consolidated statements of operations. (See Note 7 - “Investments” and Note 8 - “Fair Value Measurements”.)

At the time the Home Re Transactions were entered into, we concluded that each Home Re Entity is a variable interest entity (“VIE”). A VIE is a legal entity that does not have sufficient equity at risk to finance its activities without additional subordinated financial support or is structured such that equity investors lack the ability to make sufficient decisions relating to the entity’s operations through voting rights or do not substantively participate in gains and losses of the entity. Given that MGIC (1) does not have the unilateral power to direct the activities that most significantly affect each Home Re Entity’s economic performance and (2) does not have the obligation to absorb

losses or the right to receive benefits of each Home Re Entity that could be significant to the Home Re Entity, consolidation of the Home Re Entities is not required.

We are required to disclose our maximum exposure to loss, which we consider to be an amount that we could be required to record in our statements of operations, as a result of our involvement with the VIEs under our Home Re Transactions. As of March 31, 2023, and December 31, 2022, we did not have material exposure to the VIEs as we have no investment in the VIEs and had no reinsurance claim payments due from the VIEs under our reinsurance transactions. We are unable to determine the timing or extent of claims from losses that are ceded under the reinsurance transactions. The VIE assets are deposited in reinsurance trusts for the benefit of MGIC that will be the source of reinsurance claim payments to MGIC. The purpose of the reinsurance trusts is to provide security to MGIC for the obligations of the VIEs under the reinsurance transactions. The trustee of the reinsurance trusts, a recognized provider of corporate trust services, has established segregated accounts within the reinsurance trusts for the benefit of MGIC, pursuant to the trust agreements. The trust agreements are governed by, and construed in accordance with, the laws of the State of New York. If the trustee of the reinsurance trusts failed to distribute claim payments to us as provided in the reinsurance trusts, we would incur a loss related to our losses ceded under the reinsurance transactions and deemed unrecoverable. We are also unable to determine the impact such possible failure by the trustee to perform pursuant to the reinsurance trust agreements may have on our consolidated financial statements. As a result, we are unable to quantify our maximum exposure to loss related to our involvement with the VIEs. MGIC has certain termination rights under the reinsurance transactions should its claims not be paid. We consider our exposure to loss from our reinsurance transactions with the VIEs to be remote.

Table 4.5 presents the total assets of the Home Re Entities as of March 31, 2023 and December 31, 2022.


Home Re total assets
Table	4.5
(In thousands)		Total VIE Assets
Home Re Entity		March 31, 2023		December 31, 2022

Home Re 2022-1 Ltd.		$	473,575	$	473,575
Home Re 2021-2 Ltd.		337,486		357,340
Home Re 2021-1 Ltd.		260,680		285,039
Home Re 2020-1 Ltd.		100,561		119,159
Home Re 2019-1 Ltd.		208,146		208,146
Home Re 2018-1 Ltd.		128,995		146,822

The reinsurance trust agreements provide that the trust assets may generally only be invested in certain money market funds that (i) invest at least 99.5% of their total assets in cash or direct U.S. federal government obligations, such as U.S. Treasury bills, as well as other short-term securities backed by the full faith and credit of the U.S. federal government or issued by an agency of the U.S. federal government, (ii) have a principal stability fund rating of “AAAm” by S&P or a money market fund rating of “Aaamf” by Moody’s as of the Closing Date and thereafter maintain any rating with either S&P or Moody’s, and (iii) are permitted investments under the applicable credit for reinsurance laws and applicable PMIERs credit for reinsurance requirements.

The total calculated PMIERs credit for risk ceded under our XOL Transactions are generally based on the PMIERs requirement of the covered policies and the attachment and detachment points of the coverage, all of which fluctuate over time. (See Note 1 - “Nature of Business and Basis of Presentation”.)

Litigation and Contingencies	3 Months Ended
Litigation and Contingencies	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Litigation and Contingencies	Litigation and Contingencies Before paying an insurance claim, generally we review the loan and servicing files to determine the appropriateness of the claim amount. When reviewing the files, we may determine that we have the right to rescind coverage or deny a claim on the loan (both referred to herein as “rescissions”). In addition, our insurance policies generally provide that we can reduce a claim if the servicer did not comply with its obligations under our insurance policy (such reduction referred to as a “curtailment”). When the insured disputes our right to rescind coverage or curtail claims, we generally engage in discussions in an attempt to settle the dispute. If we are unable to reach a settlement, the outcome of a dispute ultimately may be determined by legal proceedings. Under ASC 450-20, until a loss associated with settlement discussions or legal proceedings becomes probable and can be reasonably estimated, we consider our claim payment or rescission resolved for financial reporting purposes and do not accrue an estimated loss. When we determine that a loss is probable and can be reasonably estimated, we record our best estimate of our probable loss. In those cases, until settlement negotiations or legal proceedings are concluded (including the receipt of any necessary GSE approvals), it is possible that we will record an additional loss. From time to time, we are involved in disputes and legal proceedings in the ordinary course of business. In our opinion, based on the facts known at this time, the ultimate resolution of these ordinary course disputes and legal proceedings will not have a material adverse effect on our financial position or results of operations.

Earnings per Share

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Earnings per Share

Basic earnings per share (“EPS”) is calculated by dividing net income by the weighted average number of shares of common stock outstanding. For purposes of calculating basic EPS, vested restricted stock and restricted stock units (“RSUs”) are considered outstanding. Diluted EPS includes the components of basic EPS and also gives effect to dilutive common stock equivalents. The determination of whether components are dilutive is calculated independently for each period. We calculate diluted EPS using the treasury stock method and if-converted method. Under the treasury stock method, diluted EPS reflects the potential dilution that could occur if unvested RSUs result in the issuance of common stock. Under the if-converted method, diluted EPS reflects the potential dilution that could occur if our 9% Debentures result in the issuance of common stock. The determination of potentially issuable shares does not consider the satisfaction of the conversion requirements and the shares are included in the determination of diluted EPS as of the beginning of the period, if dilutive.

Table 6.1 reconciles the numerators and denominators used to calculate basic and diluted EPS.


Earnings per share
Table	6.1
		Three Months Ended March 31,
(In thousands, except per share data)		2023		2022
Basic earnings per share:
Net income		$	154,547	$	175,013
Weighted average common shares outstanding - basic		290,989		315,975
Basic earnings per share		$	0.53	$	0.55

Diluted earnings per share:
Net income		$	154,547	$	175,013
Interest expense, net of tax (1):
9% Debentures		375		1,512
Diluted income available to common shareholders		$	154,922	$	176,525

Weighted average common shares outstanding - basic		290,989		315,975
Effect of dilutive securities:
Unvested RSUs		2,079		2,029
9% Debentures		1,644		6,534
Weighted average common shares outstanding - diluted		294,712		324,538
Diluted earnings per share		$	0.53	$	0.54

(1) Interest expense for the three months ended March 31, 2023 and 2022, respectively, has been tax effected at a rate of 21%.

Investments

3 Months Ended

Mar. 31, 2023

Investments [Abstract]

Investments

Fixed income securities

Our fixed income securities classified as available-for-sale at March 31, 2023 and December 31, 2022 are shown in tables 7.1a and 7.1b below.


Details of fixed income securities by category as of March 31, 2023
Table	7.1a
(In thousands)		Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	223,428	$	31	$	(7,713)	$	215,746
Obligations of U.S. states and political subdivisions		2,403,603		9,776		(201,039)		2,212,340
Corporate debt securities		2,341,134		1,733		(164,925)		2,177,942
ABS		124,175		15		(4,819)		119,371
RMBS		217,751		10		(22,256)		195,505
CMBS		250,589		20		(18,704)		231,905
CLOs		337,033		—		(6,459)		330,574
Foreign government debt		4,486		—		(659)		3,827
Commercial paper		76,846		—		(3)		76,843
Total fixed income securities		$	5,979,045	$	11,585	$	(426,577)	$	5,564,053


Details of fixed income securities by category as of December 31, 2022
Table	7.1b

(In thousands)		Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	145,581	$	2	$	(9,683)	$	135,900
Obligations of U.S. states and political subdivisions		2,400,261		4,866		(256,073)		2,149,054
Corporate debt securities		2,416,475		1,043		(196,377)		2,221,141
ABS		126,723		5		(6,041)		120,687
RMBS		223,743		10		(25,744)		198,009
CMBS		257,785		22		(20,591)		237,216
CLOs		337,656		5		(7,829)		329,832
Foreign government debt		4,486		—		(699)		3,787
Commercial paper		14,075		—		(3)		14,072
Total fixed income securities		$	5,926,785	$	5,953	$	(523,040)	$	5,409,698

We had $12.1 million and $11.8 million of investments at fair value on deposit with various states as of March 31, 2023 and December 31, 2022, respectively, due to regulatory requirements of those state insurance departments.

In connection with our insurance and reinsurance activities within MAC and MIC, insurance subsidiaries of MGIC, we are required to maintain assets in trusts for the benefit of contractual counterparties, which had investments at fair value of $130.7 million and $128.4 million at March 31, 2023 and December 31, 2022, respectively.

The amortized cost and fair values of fixed income securities at March 31, 2023, by contractual maturity, are shown in table 7.2 below. Actual maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Because most mortgage and asset-backed securities provide for periodic payments throughout their lives, they are listed in separate categories.


Fixed income securities maturity schedule
Table	7.2
		March 31, 2023
(In thousands)		Amortized cost		Fair Value
Due in one year or less		$	667,113	$	657,832
Due after one year through five years		1,362,173		1,300,280
Due after five years through ten years		1,831,636		1,693,166
Due after ten years		1,188,575		1,035,420
		5,049,497		4,686,698

ABS		124,175		119,371
RMBS		217,751		195,505
CMBS		250,589		231,905
CLOs		337,033		330,574
Total as of March 31, 2023		$	5,979,045	$	5,564,053

Equity securities

The cost and fair value of investments in equity securities at March 31, 2023 and December 31, 2022 are shown in tables 7.3a and 7.3b below.


Details of equity security investments as of March 31, 2023
Table	7.3a

(In thousands)		Cost		Gross Gains		Gross Losses		Fair Value
Equity securities		$	15,946	$	2	$	(1,425)	$	14,523


Details of equity security investments as of December 31, 2022
Table	7.3b

(In thousands)		Cost		Gross Gains		Gross Losses		Fair Value
Equity securities		$	15,924	$	—	$	(1,784)	$	14,140

Net gains (losses) on investments and other financial instruments

The net gains (losses) on investments and other financial instruments and the proceeds from the sale of fixed income securities classified as available-for-sale are shown in table 7.4 below.


Details of net gains (losses) on investments and other financial instruments
Table	7.4	Three Months Ended March 31,
(in thousands)		2023	2022

Fixed income securities
Gains on sales		59	4,134
Losses on sales		(4,133)	(4,657)


Equity securities gains (losses)

Market adjustment		360	(1,005)
Change in embedded derivative on Home Re Transactions (1)		(3,976)	733
Other
Gains (losses) on sales		6	11
Market adjustment		(14)	12
Net gains (losses) on investments and other financial instruments		(7,698)	(772)

Proceeds from sales of fixed income securities		32,181	216,824
Proceeds from sales of equity securities		—	—

Other invested assets

Our other invested assets balance includes an investment in FHLB stock that is carried at cost, which due to its nature approximates fair value. Ownership of FHLB stock provides access to a secured lending facility, subject to certain conditions, which includes requirements to post collateral and to maintain a minimum investment in FHLB stock.

Unrealized investment losses

Tables 7.5a and 7.5b below summarize, for all available-for-sale investments in an unrealized loss position at March 31, 2023 and December 31, 2022, the aggregate fair value and gross unrealized loss by the length of time those securities have been continuously in an unrealized loss position. The fair value amounts reported in tables 7.5a and 7.5b are estimated using the process described in Note 8 - “Fair Value Measurements” to these consolidated financial statements and in Note 3 - “Significant Accounting Policies” to the consolidated financial statements in our 2022 Annual Report on Form 10-K.


Unrealized loss aging for securities by type and length of time as of March 31, 2023
Table	7.5a

		Less Than 12 Months				12 Months or Greater				Total
(In thousands)		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	59,935	$	(1,108)	$	84,568	$	(6,605)	$	144,503	$	(7,713)
Obligations of U.S. states and political subdivisions		615,219		(13,633)		962,757		(187,406)		1,577,976		(201,039)
Corporate debt securities		889,684		(28,273)		1,269,912		(136,652)		2,159,596		(164,925)
ABS		36,028		(245)		77,206		(4,574)		113,234		(4,819)
RMBS		4,078		(177)		207,258		(22,079)		211,336		(22,256)
CMBS		11,699		(714)		221,259		(17,990)		232,958		(18,704)
CLOs		17,068		(195)		313,506		(6,264)		330,574		(6,459)
Foreign government debt		—		—		3,828		(659)		3,828		(659)
Commercial paper		491		—		3,375		(3)		3,866		(3)
Total		$	1,634,202	$	(44,345)	$	3,143,669	$	(382,232)	$	4,777,871	$	(426,577)


Unrealized loss aging for securities by type and length of time as of December 31, 2022
Table	7.5b

		Less Than 12 Months				12 Months or Greater				Total
(In thousands)		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	67,531	$	(3,583)	$	76,246	$	(6,100)	$	143,777	$	(9,683)
Obligations of U.S. states and political subdivisions		1,344,272		(157,903)		360,956		(98,170)		1,705,228		(256,073)
Corporate debt securities		1,488,255		(109,976)		758,732		(86,401)		2,246,987		(196,377)
ABS		53,201		(1,008)		67,073		(5,033)		120,274		(6,041)
RMBS		77,563		(8,572)		136,179		(17,172)		213,742		(25,744)
CMBS		166,973		(12,951)		70,792		(7,640)		237,765		(20,591)
CLOs		213,461		(4,644)		114,459		(3,185)		327,920		(7,829)
Foreign government debt		—		—		3,787		(699)		3,787		(699)
Commercial paper		—		—		3,816		(3)		3,816		(3)
Total		$	3,411,256	$	(298,637)	$	1,592,040	$	(224,403)	$	5,003,296	$	(523,040)

There were 1,152 and 1,226 securities in an unrealized loss position at March 31, 2023 and December 31, 2022, respectively. Based on current facts and circumstances, we believe the unrealized losses as of March 31, 2023 presented in table 7.5a above are not indicative of the ultimate collectability of the current amortized cost of the securities. The unrealized losses in all categories of our investments at March 31, 2023 were primarily caused by an increase in prevailing interest rates. We also rely upon estimates of several credit and non-credit factors in our review and evaluation of individual investments to determine whether a credit impairment exists. All of the securities in an unrealized loss position are current with respect to their interest obligations.

Fair Value Measurements

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

Recurring fair value measurements

The following describes the valuation methodologies generally used by the independent pricing sources, or by us, to measure financial instruments at fair value, including the general classification of such financial instruments pursuant to the valuation hierarchy.

•Fixed income securities:

U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies: Securities with valuations derived from quoted prices for identical instruments in active markets that we can access are categorized in Level 1 of the fair value hierarchy. Securities valued by surveying the dealer community, obtaining relevant trade data, benchmark quotes and spreads and incorporating this information in the valuation process are categorized as Level 2 of the fair value hierarchy.

Corporate Debt Securities are valued by surveying the dealer community, obtaining relevant trade data, benchmark quotes and spreads and incorporating this information into the valuation process. These securities are generally categorized in Level 2 of the fair value hierarchy.

Obligations of U.S. States & Political Subdivisions are valued by tracking, capturing, and analyzing quotes for active issues and trades reported via the Municipal Securities Rulemaking Board records. Daily briefings and reviews of current economic conditions, trading levels, spread relationships, and the slope of the yield curve provide further data for evaluation. These securities are generally categorized in Level 2 of the fair value hierarchy.

Residential Mortgage-Backed Securities ("RMBS") are valued by monitoring interest rate movements, and other pertinent data daily. Incoming market data is enriched to derive spread, yield and/or price data as appropriate, enabling known data points to be extrapolated for valuation application across a range of related securities. These securities are generally categorized in Level 2 of the fair value hierarchy.

Commercial Mortgage-Backed Securities ("CMBS") are valued using techniques that reflect market participants’ assumptions and maximize the use of relevant observable inputs including quoted prices for similar assets, benchmark yield curves and market corroborated inputs. Evaluation uses regular reviews of the inputs for securities covered, including executed trades, broker quotes, credit information, collateral attributes and/or cash flow waterfall as applicable. These securities are generally categorized in Level 2 of the fair value hierarchy.

Asset-Backed Securities ("ABS") are valued using spreads and other information solicited from market buy-and-sell-side sources, including primary and secondary dealers, portfolio managers, and research analysts. Cash flows are generated for each tranche, benchmark yields are determined, and deal collateral performance and tranche level attributes including trade activity, bids, and offers are applied, resulting in tranche specific prices. These securities are generally categorized in Level 2 of the fair value hierarchy.

Collateralized loan obligations ("CLOs") are valued by evaluating manager rating, seniority in the capital structure, assumptions about prepayment, default and recovery and their impact on cash flow generation. Loan level net asset values are determined and aggregated for tranches and as a final step prices are checked against available recent trade activity. These securities are generally categorized in Level 2 of the fair value hierarchy.

Foreign government debt is valued by surveying the dealer community, obtaining relevant trade data, benchmark quotes and spreads and incorporating this information into the valuation process. These securities are generally categorized in Level 2 of the fair value hierarchy.

Commercial Paper, which has an original maturity greater than 90 days, is valued using market data for comparable instruments of similar maturity and average yields. These securities are generally categorized in Level 2 of the fair value hierarchy.

•Equity securities: Consist of actively traded, exchange-listed equity securities, including exchange traded funds (“ETFs”) and Bond Mutual Funds, with valuations derived from quoted prices for identical assets in active markets that we can access. These securities are valued in Level 1 of the fair value hierarchy.

•Cash Equivalents: Consists of money market funds and treasury bills with valuations derived from quoted prices for identical assets in active markets that we can access. These securities are valued in level 1 of the fair value hierarchy. Instruments in this category valued using market data for comparable instruments are classified as level 2 in the fair value hierarchy.

Assets measured at fair value, by hierarchy level, as of March 31, 2023 and December 31, 2022 are shown in tables 8.1a and 8.1b below. The fair value of the assets is estimated using the process described above, and more fully in Note 3 - “Significant Accounting Policies” to the consolidated financial statements in our 2022 Annual Report on Form 10-K.


Assets carried at fair value by hierarchy level as of March 31, 2023
Table	8.1a
(In thousands)		Total Fair Value			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	215,746		$	173,261	$	42,485
Obligations of U.S. states and political subdivisions		2,212,340			—		2,212,340
Corporate debt securities		2,177,942			—		2,177,942
ABS		119,371			—		119,371
RMBS		195,505			—		195,505
CMBS		231,905			—		231,905
CLOs		330,574			—		330,574
Foreign government debt		3,827			—		3,827
Commercial paper		76,843			—		76,843
Total fixed income securities		5,564,053			173,261		5,390,792
Equity securities		14,523			14,523		—
Cash equivalents		362,788		(1)	328,906		33,882
Total		$	5,941,364		$	516,690	$	5,424,674


Assets carried at fair value by hierarchy level as of December 31, 2022
Table	8.1b
(In thousands)		Total Fair Value			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	135,900		$	116,897	$	19,003
Obligations of U.S. states and political subdivisions		2,149,054			—		2,149,054
Corporate debt securities		2,221,141			—		2,221,141
ABS		120,687			—		120,687
RMBS		198,009			—		198,009
CMBS		237,216			—		237,216
CLOs		329,832			—		329,832
Foreign government debt		3,787			—		3,787
Commercial paper		14,072			—		14,072
Total fixed income securities		5,409,698			116,897		5,292,801
Equity securities		14,140			14,140		—
Cash equivalents		328,756		(1)	324,129		4,627
Total		$	5,752,594		$	455,166	$	5,297,428
(1) Includes restricted cash equivalents

Certain financial instruments, including insurance contracts, are excluded from these fair value disclosure requirements. The carrying values of cash (Level 1) and accrued investment income (Level 2) approximated their fair values. Additional fair value disclosures related to our investment portfolio are included in Note 7 – “Investments.”

In addition to the assets carried at fair value discussed above, we have embedded derivatives carried at fair value related to our Home Re Transactions that are classified as Other liabilities or Other assets in our consolidated balance sheets. The estimated fair value related to our embedded derivatives reflects the present value impact of the variation in investment income on the assets held by the reinsurance trusts and the contractual reference rate on the Home Re Transactions used to calculate the reinsurance premiums we estimate we will pay over the estimated remaining life. These liabilities or assets are categorized in Level 3 of the fair value hierarchy. At March 31, 2023 and December 31, 2022, the fair value of the embedded derivatives was a liability of $1.5 million and an asset of $2.5 million, respectively. (See Note 4 - "Reinsurance" for more information about our reinsurance programs.)

Real estate acquired through claim settlement is carried at fair values and is reported in “Other assets” on the consolidated balance sheet. These assets are categorized as Level 3 of the fair value hierarchy. Purchases of real estate acquired were $0.1 million and $0.5 million for the three months ended March 31, 2023, and 2022, respectively. Sales of real estate acquired were $1.2 million and $1.0 million for the three months ended March 31, 2023, and 2022, respectively.

Financial assets and liabilities not measured at fair value

Other invested assets include an investment in FHLB stock that is carried at cost, which due to restrictions that require it to be redeemed or sold only to the security issuer at par value, approximates fair value. The fair value of other invested assets is categorized as Level 2.

Financial liabilities include our outstanding debt obligations. The fair values of our 5.25% Notes and 9% Debentures were based on observable market prices. In all cases the fair values of the financial liabilities below are categorized as level 2.

Table 8.2 presents the carrying value and fair value of our financial assets and liabilities disclosed, but not carried, at fair value at March 31, 2023 and December 31, 2022.


Financial assets and liabilities not measured at fair value
Table	8.2
		March 31, 2023				December 31, 2022
(In thousands)		Carrying Value		Fair Value		Carrying Value		Fair Value
Financial assets
Other invested assets		$	850	$	850	$	850	$	850

Financial liabilities
5.25% Senior Notes		642,092		617,994		641,724		600,938
9% Convertible Junior Subordinated Debentures		21,086		28,196		21,086		28,085
Total financial liabilities		$	663,178	$	646,190	$	662,810	$	629,023

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Other Comprehensive Income

3 Months Ended

Mar. 31, 2023

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Other Comprehensive Income

The pretax and related income tax benefit (expense) components of our other comprehensive income (loss) for the three months ended March 31, 2023 and 2022 are included in table 9.1 below.


Components of other comprehensive income (loss)
Table	9.1
		Three Months Ended March 31,
(In thousands)		2023		2022
Net unrealized investment gains (losses) arising during the period		$	102,099	$	(342,960)
Total income tax benefit (expense)		(21,440)		72,022
Net of taxes		80,659		(270,938)

Net changes in benefit plan assets and obligations		6,776		498
Total income tax benefit (expense)		(1,423)		(105)
Net of taxes		5,353		393

Total other comprehensive income (loss)		108,875		(342,462)
Total income tax benefit (expense)		(22,863)		71,917
Total other comprehensive income (loss), net of tax		$	86,012	$	(270,545)

The pretax and related income tax benefit (expense) components of the amounts reclassified from our accumulated other comprehensive income (loss) (“AOCI”) to our consolidated statements of operations for the three months ended March 31, 2023 and 2022 are included in table 9.2 below.


Reclassifications from AOCI
Table	9.2
		Three Months Ended March 31,
(In thousands)		2023		2022
Reclassification adjustment for net realized (losses) gains(1)		$	(4,164)	$	4,841
Income tax benefit (expense)		874		(1,017)
Net of taxes		(3,290)		3,824

Reclassification adjustment related to benefit plan assets and obligations (2)		(8,932)		(498)
Income tax benefit (expense)		1,876		105
Net of taxes		(7,056)		(393)

Total reclassifications		(13,096)		4,343
Income tax benefit (expense)		2,750		(912)
Total reclassifications, net of tax		$	(10,346)	$	3,431

(1)Increases (decreases) Net realized investment gains (losses) on the consolidated statements of operations.

(2)Decreases (increases) Other underwriting and operating expenses, net on the consolidated statements of operations.

A rollforward of AOCI for the three months ended March 31, 2023, including amounts reclassified from AOCI, are included in table 9.3 below.


Rollforward of AOCI
Table	9.3
		Three Months Ended March 31, 2023
(In thousands)		Net unrealized gains and (losses) on available-for-sale securities		Net benefit plan assets and (obligations) recognized in shareholders' equity		Total accumulated other comprehensive income (loss)
Balance at December 31, 2022, net of tax		$	(408,496)	$	(73,015)	$	(481,511)
Other comprehensive income (loss) before reclassifications		77,369		(1,703)		75,666
Less: Amounts reclassified from AOCI		(3,290)		(7,056)		(10,346)
Balance, March 31, 2023, net of tax		$	(327,837)	$	(67,662)	$	(395,499)

Benefit Plans

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Benefit Plans

Table 10.1 provides the components of net periodic benefit cost for our pension, supplemental executive retirement and other postretirement benefit plans for the three months ended March 31, 2023 and 2022.


Components of net periodic benefit cost
Table	10.1
		Three Months Ended March 31,
		Pension and Supplemental Executive Retirement Plans				Other Postretirement Benefit Plans
(In thousands)		2023		2022		2023		2022
Company service cost		$	—	$	1,757	$	386	$	348
Interest cost		3,682		2,877		398		177
Expected return on plan assets		(3,581)		(4,952)		(2,063)		(2,625)
Amortization of:
Net actuarial losses (gains)		597		1,183		(64)		(754)
Prior service cost (credit)		86		(53)		465		122
Cost of settlements and curtailments		7,847		—		—		—
Net periodic benefit cost (benefit)		$	8,631	$	812	$	(878)	$	(2,732)

Effective January 1, 2023, the defined benefit pension plan and supplemental executive retirement plan are frozen (no future benefits will be accrued for participants due to employment and no new participants will be added). Participants in these plans are fully vested in their benefits.

- Definition

The entire disclosure for retirement benefits.

+ References

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+ Details

Loss Reserves

3 Months Ended

Mar. 31, 2023

Insurance Loss Reserves [Abstract]

Loss Reserves

We establish case reserves and LAE reserves on delinquent loans that were reported to us as two or more payments past due and have not become current or resulted in a claim payment. Such loans are referred to as being in our delinquency inventory. Case reserves are established by estimating the number of loans in our delinquency inventory that will result in a claim payment, which is referred to as the claim rate, and further estimating the amount of the claim payment, which is referred to as claim severity.

IBNR reserves are established for estimated losses from delinquencies we estimate have occurred prior to the close of an accounting period, but have not yet been reported to us. IBNR reserves are also established using estimated claim rates and claim severities.

Estimation of losses is inherently judgmental. Even in a stable environment, changes to our estimates could result in a material impact to our consolidated results of operations and financial position. The conditions that affect the claim rate and claim severity include the current and future state of the domestic economy, including unemployment and the current and future strength of local housing markets; exposure on insured loans; the amount of time between delinquency and claim filing (all else being equal, the longer the period between delinquency and claim filing, the greater the severity); and curtailments and rescissions. The actual amount of the claim payments may be substantially different than our loss reserve estimates. Our estimates could be adversely affected by several factors, including a deterioration of regional or national economic conditions, including unemployment, leading to a reduction in borrowers’ income and thus their ability to make mortgage payments, the impact of past and future government initiatives and actions taken by the GSEs (including mortgage forbearance programs and foreclosure moratoriums), and a drop in housing values which may affect borrower willingness to continue to make mortgage payments when the value of the home is below the mortgage balance. Loss reserves in future periods will also be dependent on the number of loans reported to us as delinquent.

Changes to our estimates could result in a material impact to our consolidated results of operations and financial position, even in a stable economic environment. Given the uncertainty of the macroeconomic environment, including the effectiveness of loss mitigation efforts, change in home prices, and changes in unemployment, our loss reserve estimates may continue to be impacted.

In considering the potential sensitivity of the factors underlying our estimate of loss reserves, it is possible that even a relatively small change in our estimated claim rate or claim severity could have a material impact on loss reserves and, correspondingly, on our consolidated results of operations even in a stable economic environment. For example, as of March 31, 2023, assuming all other factors remain constant, a $1,000 increase/decrease in the average severity reserve factor would change the loss reserve amount by approximately +/- $9 million. A one percentage point increase/decrease in the average claim rate reserve factor would change the loss reserve amount by approximately +/- $15 million.

The “Losses incurred” section of table 11.1 below shows losses incurred on delinquencies that occurred in the current year and in prior years. The amount of losses incurred relating to delinquencies that occurred in the current year represents the estimated amount to be ultimately paid on such delinquencies. The amount of losses incurred relating to delinquencies that occurred in prior years represents the difference between the actual claim rate and claim severity associated with those delinquencies resolved in the current year compared to the estimated claim rate and claim severity at the prior year-end, as well as a re-estimation of amounts to be ultimately paid on delinquencies continuing from the end of the prior year. This re-estimation of the claim rate and claim severity is the result of our review of current trends in the delinquency inventory, such as percentages of delinquencies that have resulted in a claim, the amount of the claims relative to the average loan exposure, changes in the relative level of delinquencies by geography and changes in average loan exposure.

Losses incurred on delinquencies that occurred in the current year increased for the three months ended March 31, 2023, compared to the same period last year. The increase is primarily due to an increase in estimated severity on current year delinquencies.

For the three months ended March 31, 2023 and March 31, 2022 we experienced favorable loss development of $40.8 million and $55.7 million, respectively, on previously received delinquencies. The favorable development for both periods primarily resulted from a decrease in the expected claim rate on previously received delinquencies. Home price appreciation experienced in recent years has allowed borrowers to cure their delinquencies through the sale of their property.

The “Losses paid” section of table 11.1 below shows the amount of losses paid on delinquencies that occurred in the current year and losses paid on delinquencies that occurred in prior years. Foreclosure moratoriums and forbearance plans in place have increased the average time it takes to receive a claim.

Table 11.1 provides a reconciliation of beginning and ending loss reserves as of and for the three months ended March 31, 2023 and 2022.


Development of reserves for losses and loss adjustment expenses
Table	11.1
		Three Months Ended March 31,
(In thousands)		2023		2022
Reserve at beginning of period		$	557,988	$	883,522
Less reinsurance recoverable		28,240		66,905
Net reserve at beginning of period		529,748		816,617

Losses incurred:
Losses and LAE incurred in respect of delinquency notices received in:
Current year		47,212		36,344
Prior years (1)		(40,766)		(55,658)
Total losses incurred		6,446		(19,314)

Losses paid:
Losses and LAE paid in respect of delinquency notices received in:
Current year		—		—
Prior years		10,440		10,748

Total losses paid		10,440		10,748
Net reserve at end of period		525,754		786,555
Plus reinsurance recoverable		32,761		64,717
Reserve at end of period		$	558,515	$	851,272

(1)A positive number for prior year loss reserve development indicates a deficiency of prior year reserves. A negative number for prior year loss reserve development indicates a redundancy of prior year loss reserves. See the following table for more information about prior year loss reserve development.

The prior year loss reserve development for the three months of March 31, 2023 and 2022 is shown in table 11.2 below.


Reserve development on previously received delinquencies
Table	11.2
		Three Months Ended March 31,
(In thousands)		2023		2022
Increase (decrease) in estimated claim rate on primary defaults		$	(43,431)	$	(55,777)

Change in estimates related to severity on primary defaults, pool reserves, LAE reserves, reinsurance, and other		2,665		119
Total prior year loss development (1)		$	(40,766)	$	(55,658)

(1)A positive number for prior year loss reserve development indicates a deficiency of prior year loss reserves. A negative number for prior year loss reserve development indicates a redundancy of prior year loss reserves.

Delinquency inventory

A rollforward of our primary delinquency inventory for the three months ended March 31, 2023 and 2022 appears in table 11.3 below. The information concerning new notices and cures is compiled from monthly reports received from loan servicers. The level of new notice and cure activity reported in a particular month can be influenced by, among other things, the date on which a servicer generates its report, the number of business days in a month and transfers of servicing between loan servicers.


Delinquency inventory rollforward
Table	11.3
		Three Months Ended March 31,
		2023	2022
Delinquency inventory at beginning of period		26,387	33,290
New notices		11,297	10,703
Cures		(12,607)	(13,200)
Paid claims		(311)	(322)
Rescissions and denials		(9)	(9)

Delinquency inventory at end of period		24,757	30,462

Table 11.4 below shows the number of consecutive months a borrower is delinquent. Historically as a delinquency ages it is more likely to result in a claim.


Primary delinquency inventory - consecutive months delinquent
Table	11.4
		March 31, 2023		December 31, 2022		March 31, 2022
3 months or less		7,573		8,820		7,382
4-11 months		8,563		8,217		8,131
12 months or more (1)		8,621		9,350		14,949
Total		24,757		26,387		30,462
3 months or less		31	%	33	%	24	%
4-11 months		34	%	31	%	27	%
12 months or more		35	%	36	%	49	%
Total		100	%	100	%	100	%
Primary claims received inventory included in ending delinquent inventory		296		267		217

(1)Approximately 38%, 36%, and 23% of the primary delinquency inventory delinquent for 12 consecutive months or more has been delinquent for at least 36 consecutive months as of March 31, 2023, December 31, 2022, and March 31, 2022, respectively.

Premium refunds

Our estimate of premiums to be refunded on expected claim payments is accrued for separately in “Other Liabilities” on our consolidated balance sheets and approximated $24.2 million and $25.5 million at March 31, 2023 and December 31, 2022, respectively.

Shareholders' Equity	3 Months Ended
Shareholders' Equity	Mar. 31, 2023
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders’ Equity Share repurchase programs Repurchases of our common stock may be made from time to time on the open market (including through 10b5-1 plans) or through privately negotiated transactions. In the first three months of 2023, we repurchased 5.8 million shares at an average cost of $13.43 per share, which included commissions. In 2022, we repurchased approximately 27.8 million shares of our common stock, at an average cost of $13.89 per share, which included commissions. At March 31, 2023, we had $36 million remaining under a share repurchase program approved by our Board of Directors in 2021 that expires at year end 2023. In April 2023, we repurchased an additional 1.7 million shares totaling $24.4 million under the remaining authorization. Also in April 2023, our board of directors approved a share repurchase program, authorizing us to repurchase an additional $500 million of common stock at any time prior to July 1, 2025. Cash dividends In the first quarter of 2023, we paid quarterly cash dividends of $0.10 per share which totaled $29.6 million. On April 27, 2023, the Board of Directors declared a quarterly cash dividend to holders of the company’s common stock of $0.10 per share to shareholders of record on May 11, 2023, payable on May 25, 2023.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (i)
-URI https://asc.fasb.org/extlink&oid=126973232&loc=SL123496158-112644

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(e)(1))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126731327&loc=SL126733271-114008

+ Details

Share-Based Compensation

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Share-Based Compensation

We have certain share-based compensation plans. Under the fair value method, compensation cost is measured at the grant date based on the fair value of the award and is recognized over the service period which generally corresponds to the vesting period. Awards under our plans generally vest over periods ranging from one to three years, although awards to our non-employee directors vest immediately.

Table 13.1 shows the number of restricted stock units (RSUs) granted to employees and non-employee directors and the weighted average fair value per share during the periods presented (shares in thousands).


Restricted stock unit grants
Table	13.1
			Three months ended March 31,
			2023			2022
			RSUs Granted (in thousands)	Weighted Average Share Fair Value		RSUs Granted (in thousands)	Weighted Average Share Fair Value
RSUs subject to performance conditions		(1)	949	$	14.17	848	$	15.46
RSUs subject only to service conditions			354	14.17		316	15.46
Non-employee director RSUs			106	14.17		97	15.46

(1)Shares granted are subject to performance conditions under which the target number of shares granted may vest up to 200%.

Statutory Information

3 Months Ended

Mar. 31, 2023

Statutory Capital [Abstract]

Insurance Disclosure

Statutory Information

Statutory Capital Requirements

The insurance laws of 16 jurisdictions, including Wisconsin, our domiciliary state, require a mortgage insurer to maintain a minimum amount of statutory capital relative to the RIF (or a similar measure) in order for the mortgage insurer to continue to write new business. We refer to these requirements as the “State Capital Requirements” and, together with the GSE Financial Requirements, as the “Financial Requirements.” While they vary among jurisdictions, the most common State Capital Requirements allow for a maximum risk-to-capital ratio of 25 to 1. A risk-to-capital ratio will increase if (i) the percentage decrease in capital exceeds the percentage decrease in insured risk, or (ii) the percentage increase in capital is less than the percentage increase in insured risk. Wisconsin does not regulate capital by using a risk-to-capital measure but instead requires a minimum policyholder position (“MPP”). MGIC’s “policyholder position” includes its net worth or surplus, and its contingency loss reserve.

At March 31, 2023, MGIC’s risk-to-capital ratio was 9.7 to 1, below the maximum allowed by the jurisdictions with State Capital Requirements, and its policyholder position was $3.7 billion above the required MPP of $2.1 billion. The calculation of our risk-to-capital ratio and MPP reflect credit for the risk ceded under our reinsurance transactions. If MGIC is not allowed an agreed level of credit under either the State Capital Requirements or the financial requirements of the PMIERs, MGIC may terminate the reinsurance agreements without penalty.

Dividend restrictions

MGIC is subject to statutory regulations as to payment of dividends. The maximum amount of dividends that MGIC may pay in any twelve-month period without regulatory approval by the OCI is the lesser of adjusted statutory net income or 10% of statutory policyholders’ surplus as of the preceding calendar year end. Adjusted statutory net income is defined for this purpose to be the greater of statutory net income, net of realized investment gains, for the calendar year preceding the date of the dividend or statutory net income, net of realized investment gains, for the three calendar years preceding the date of the dividend less dividends paid within the first two of the preceding three calendar years. The maximum dividend that could be paid is reduced by dividends paid in the twelve months preceding the dividend payment date. Before making any dividend payments, we will notify the OCI to ensure it does not object. In May 2023, MGIC paid a $300 million dividend to our holding company.

The OCI recognizes only statutory accounting principles prescribed, or practices permitted by the State of Wisconsin for determining and reporting the financial condition and results of operations of an insurance company. The OCI has adopted certain prescribed accounting practices that differ from those found in other states. Specifically, Wisconsin domiciled companies record changes in the contingency loss reserves through their income statement as a change in underwriting deduction. As a result, in periods in which MGIC is increasing contingency loss reserves, statutory net income is reduced.

Statutory Financial Information

The statutory net income, policyholders’ surplus, and contingency reserve liability of our insurance subsidiaries, including MGIC, are shown in table 14.1.


Financial information of our insurance subsidiaries (including MGIC)
Table 14.1
	As of and for the Three Months Ended March 31,
(In thousands)	2023		2022
Statutory net income	$	54,612	$	96,018
Statutory policyholders' surplus	992,075		1,319,633
Contingency reserve	4,803,752		4,263,599

Nature of Business and Basis of Presentations (Policies)	3 Months Ended
	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reclassifications	Reclassifications Certain prior period amounts have been reclassified to conform to the current year presentation.

Significant Accounting Policies (Policies)	3 Months Ended
Significant Accounting Policies (Policies)	Mar. 31, 2023
Accounting Standards Update and Change in Accounting Principle [Abstract]
Prospective Accounting Standards	Accounting standards effective in 2023, or early adopted, and relevant to our financial statements are described below: Reference Rate Reform: ASU 2022-06 In March 2020, the FASB issued ASU 2020-04 to provide temporary optional guidance to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform. It provided optional expedients and exceptions for applying generally accepted accounting principles to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. In December 2022, the FASB issued ASU 2022-06, extending the election and application from March 12, 2020 through December 31, 2024 (originally December 31, 2022). The adoption of, and future elections under, this standard are not expected to have a material impact on our consolidated financial statements as the standard will ease, if warranted, the requirements for accounting for the future effects of reference rate reform. We continue to monitor the impact the discontinuance of LIBOR or other reference rates will have on our contracts and other transactions. Inflation Reduction Act On August 16, 2022, the Inflation Reduction Act (the “IRA”) was enacted and signed into law in the United States. The IRA includes provisions for a 15% corporate minimum tax and a 1% excise tax on net stock repurchases. Both of these taxes are effective in 2023. We do not expect these tax provisions to have a material impact on our consolidated financial results, including our annual estimated effective tax rate. The amount of the excise tax on the repurchase of corporate stock was immaterial in the first quarter of 2023.

Debt (Tables)

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Long-term debt

The aggregate carrying values of our long-term debt obligations and their par values, if different, as of March 31, 2023 and December 31, 2022 are presented in table 3.1 below.


Long-term debt obligations
Table	3.1
(In millions)		March 31, 2023		December 31, 2022
5.25% Notes, due August 2028 (par value: $650 million)		$	642.1	$	641.7
9% Debentures, due April 2063 (1)		21.1		21.1
Long-term debt, carrying value		$	663.2	$	662.8

Reinsurance (Tables)

3 Months Ended

Mar. 31, 2023

Reinsurance Disclosures [Abstract]

Effect of reinsurance transactions

The effect of all of our reinsurance agreements on premiums earned and losses incurred is shown in table 4.1 below.


Reinsurance
Table	4.1
		Three Months Ended March 31,
(In thousands)		2023		2022
Premiums earned:
Direct		$	286,034	$	287,273
Assumed		2,787		2,126
Ceded - quota share reinsurance (1)		(29,877)		(22,378)

Ceded - excess-of-loss reinsurance		(16,929)		(11,781)
Total ceded		(46,806)		(34,159)
Net premiums earned		$	242,015	$	255,240

Losses incurred:
Direct		$	11,123	$	(21,092)
Assumed		4		(207)
Ceded - quota share reinsurance		(4,681)		1,985
Losses incurred, net		$	6,446	$	(19,314)

Other Reinsurance Impacts:
Profit commission on quota share reinsurance (1)		$	31,711	$	38,980
Ceding commission on quota share reinsurance		12,318		12,272

(1)Ceded premiums earned are shown net of profit commission.

Schedule Of Quota Share Reinsurance Transactions

Table 4.2 below provides additional detail regarding our QSR Transactions.


Quota Share Reinsurance
Table	4.2

Quota Share Contract		Covered Policy Years	Quota Share %		Annual Loss Ratio to Exhaust Profit Commission (1)		Contractual Termination Date
2020 QSR		2020	12.5	%	62.0	%	December 31, 2031
2020 QSR and 2021 QSR		2020	17.5	%	62.0	%	December 31, 2032
2020 QSR and 2021 QSR		2021	17.5	%	61.9	%	December 31, 2032
2021 QSR and 2022 QSR		2021	12.5	%	57.5	%	December 31, 2032
2021 QSR and 2022 QSR		2022	15.0	%	57.5	%	December 31, 2033
2022 QSR and 2023 QSR		2022	15.0	%	62.0	%	December 31, 2033
2022 QSR and 2023 QSR		2023	15.0	%	62.0	%	December 31, 2034
2023 QSR		2023	10.0	%	58.5	%	December 31, 2034
Credit Union QSR		2020-2025	65.0	%	50.0	%	December 31, 2039

(1) We will receive a profit commission provided the annual loss ratio on policies covered under the transaction remains below this ratio.

Quota Share Reinsurance

Table

4.3

Quota Share Contract

Covered Policy Years

Optional Termination Date (1)

Optional Quota Share % Reduction Date (2)

Optional Reduced Quota Share %

2020 QSR

2020

June 30, 2023

January 1, 2023

10.5% or 8%

2020 QSR and 2021 QSR

2020

June 30, 2023

January 1, 2023

14.5% or 12%

2020 QSR and 2021 QSR

2021

December 31, 2023

January 1, 2023

14.5% or 12%

2021 QSR and 2022 QSR

2021

December 31, 2023

January 1, 2023

10.5% or 8%

2021 QSR and 2022 QSR

2022

December 31, 2024

July 1, 2023

12.5% or 10%

2022 QSR and 2023 QSR

2022

December 31, 2024

July 1, 2023

12.5% or 10%

2022 QSR and 2023 QSR

2023

December 31, 2025

July 1, 2024

12.5% or 10%

2023 QSR

2023

December 31, 2025

July 1, 2024

8% or 7%

(1) We can elect early termination of the QSR Transaction beginning on this date, and semi-annually thereafter.

(2) We can elect to reduce the quota share percentage beginning on this date, and semi-annually thereafter.

Schedule of coverages and retention

Tables 4.4a and 4.4b provide a summary of our XOL Transactions as of March 31, 2023 and December 31, 2022.

Excess of Loss Reinsurance

4.4a

($ in thousands)

Issue Date

Policy In force Dates

Optional Call Date (1)

Legal Maturity

Initial First Layer Retention

Initial Excess of Loss Reinsurance Coverage

2022 Traditional XOL

April 1, 2022

January 1, 2022 - December 30, 2022

January 1, 2030

10 years

$82,523

$142,642

Home Re 2022-1, Ltd.

April 26, 2022

May 29, 2021 - December 31, 2021

April 25, 2028

12.5 years

$325,589

$473,575

Home Re 2021-2, Ltd.

August 3, 2021

January 1, 2021 - May 28, 2021

July 25, 2028

12.5 years

190,159

398,429

Home Re 2021-1, Ltd.

February 2, 2021

August 1, 2020 - December 31, 2020

January 25, 2028

12.5 years

211,159

398,848

Home Re 2020-1, Ltd.

October 29, 2020

January 1, 2020 - July 31, 2020

October 25, 2027

10 years

275,283

412,917

Home Re 2019-1, Ltd.

May 25, 2019

January 1, 2018 - March 31, 2019

May 25, 2026

10 years

185,730

315,739

Home Re 2018-1, Ltd.

October 30, 2018

July 1, 2016 - December 31, 2017

October 25, 2025

10 years

168,691

318,636



4.4b	Remaining First Layer Retention				Remaining Excess of Loss Reinsurance Coverage
($ in thousands)	March 31, 2023		December 31, 2022		March 31, 2023		December 31, 2022
2022 Traditional XOL	$	82,509	$	82,517	$	142,642	$	142,642
Home Re 2022-1, Ltd.	$	325,520	325,576		$	473,575	473,575
Home Re 2021-2, Ltd.	190,016		190,097		327,346		352,084
Home Re 2021-1, Ltd.	211,055		211,102		251,942		277,053
Home Re 2020-1, Ltd.	274,979		274,871		92,648		113,247
Home Re 2019-1, Ltd.	183,351		183,540		208,146		208,146
Home Re 2018-1, Ltd.	164,708		164,849		121,513		140,993

Schedule of total assets of Home Re

Table 4.5 presents the total assets of the Home Re Entities as of March 31, 2023 and December 31, 2022.


Home Re total assets
Table	4.5
(In thousands)		Total VIE Assets
Home Re Entity		March 31, 2023		December 31, 2022

Home Re 2022-1 Ltd.		$	473,575	$	473,575
Home Re 2021-2 Ltd.		337,486		357,340
Home Re 2021-1 Ltd.		260,680		285,039
Home Re 2020-1 Ltd.		100,561		119,159
Home Re 2019-1 Ltd.		208,146		208,146
Home Re 2018-1 Ltd.		128,995		146,822

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

+ References + Details

Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Calculation of earnings (loss) per share

Table 6.1 reconciles the numerators and denominators used to calculate basic and diluted EPS.


Earnings per share
Table	6.1
		Three Months Ended March 31,
(In thousands, except per share data)		2023		2022
Basic earnings per share:
Net income		$	154,547	$	175,013
Weighted average common shares outstanding - basic		290,989		315,975
Basic earnings per share		$	0.53	$	0.55

Diluted earnings per share:
Net income		$	154,547	$	175,013
Interest expense, net of tax (1):
9% Debentures		375		1,512
Diluted income available to common shareholders		$	154,922	$	176,525

Weighted average common shares outstanding - basic		290,989		315,975
Effect of dilutive securities:
Unvested RSUs		2,079		2,029
9% Debentures		1,644		6,534
Weighted average common shares outstanding - diluted		294,712		324,538
Diluted earnings per share		$	0.53	$	0.54

(1) Interest expense for the three months ended March 31, 2023 and 2022, respectively, has been tax effected at a rate of 21%.

Investments (Tables)

3 Months Ended

Mar. 31, 2023

Investments [Abstract]

Amortized cost, gross unrealized gains and losses and fair value of fixed income securities

Our fixed income securities classified as available-for-sale at March 31, 2023 and December 31, 2022 are shown in tables 7.1a and 7.1b below.


Details of fixed income securities by category as of March 31, 2023
Table	7.1a
(In thousands)		Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	223,428	$	31	$	(7,713)	$	215,746
Obligations of U.S. states and political subdivisions		2,403,603		9,776		(201,039)		2,212,340
Corporate debt securities		2,341,134		1,733		(164,925)		2,177,942
ABS		124,175		15		(4,819)		119,371
RMBS		217,751		10		(22,256)		195,505
CMBS		250,589		20		(18,704)		231,905
CLOs		337,033		—		(6,459)		330,574
Foreign government debt		4,486		—		(659)		3,827
Commercial paper		76,846		—		(3)		76,843
Total fixed income securities		$	5,979,045	$	11,585	$	(426,577)	$	5,564,053


Details of fixed income securities by category as of December 31, 2022
Table	7.1b

(In thousands)		Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	145,581	$	2	$	(9,683)	$	135,900
Obligations of U.S. states and political subdivisions		2,400,261		4,866		(256,073)		2,149,054
Corporate debt securities		2,416,475		1,043		(196,377)		2,221,141
ABS		126,723		5		(6,041)		120,687
RMBS		223,743		10		(25,744)		198,009
CMBS		257,785		22		(20,591)		237,216
CLOs		337,656		5		(7,829)		329,832
Foreign government debt		4,486		—		(699)		3,787
Commercial paper		14,075		—		(3)		14,072
Total fixed income securities		$	5,926,785	$	5,953	$	(523,040)	$	5,409,698

Amortized cost and fair values of fixed income securities by contractual maturity


Fixed income securities maturity schedule
Table	7.2
		March 31, 2023
(In thousands)		Amortized cost		Fair Value
Due in one year or less		$	667,113	$	657,832
Due after one year through five years		1,362,173		1,300,280
Due after five years through ten years		1,831,636		1,693,166
Due after ten years		1,188,575		1,035,420
		5,049,497		4,686,698

ABS		124,175		119,371
RMBS		217,751		195,505
CMBS		250,589		231,905
CLOs		337,033		330,574
Total as of March 31, 2023		$	5,979,045	$	5,564,053

Cost and fair value of investments in equity securities

The cost and fair value of investments in equity securities at March 31, 2023 and December 31, 2022 are shown in tables 7.3a and 7.3b below.


Details of equity security investments as of March 31, 2023
Table	7.3a

(In thousands)		Cost		Gross Gains		Gross Losses		Fair Value
Equity securities		$	15,946	$	2	$	(1,425)	$	14,523


Details of equity security investments as of December 31, 2022
Table	7.3b

(In thousands)		Cost		Gross Gains		Gross Losses		Fair Value
Equity securities		$	15,924	$	—	$	(1,784)	$	14,140

Schedule of realized gains (losses) and proceeds from sale of securities

The net gains (losses) on investments and other financial instruments and the proceeds from the sale of fixed income securities classified as available-for-sale are shown in table 7.4 below.


Details of net gains (losses) on investments and other financial instruments
Table	7.4	Three Months Ended March 31,
(in thousands)		2023	2022

Fixed income securities
Gains on sales		59	4,134
Losses on sales		(4,133)	(4,657)


Equity securities gains (losses)

Market adjustment		360	(1,005)
Change in embedded derivative on Home Re Transactions (1)		(3,976)	733
Other
Gains (losses) on sales		6	11
Market adjustment		(14)	12
Net gains (losses) on investments and other financial instruments		(7,698)	(772)

Proceeds from sales of fixed income securities		32,181	216,824
Proceeds from sales of equity securities		—	—

Aging of the fair values of securities in an unrealized loss position


Unrealized loss aging for securities by type and length of time as of March 31, 2023
Table	7.5a

		Less Than 12 Months				12 Months or Greater				Total
(In thousands)		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	59,935	$	(1,108)	$	84,568	$	(6,605)	$	144,503	$	(7,713)
Obligations of U.S. states and political subdivisions		615,219		(13,633)		962,757		(187,406)		1,577,976		(201,039)
Corporate debt securities		889,684		(28,273)		1,269,912		(136,652)		2,159,596		(164,925)
ABS		36,028		(245)		77,206		(4,574)		113,234		(4,819)
RMBS		4,078		(177)		207,258		(22,079)		211,336		(22,256)
CMBS		11,699		(714)		221,259		(17,990)		232,958		(18,704)
CLOs		17,068		(195)		313,506		(6,264)		330,574		(6,459)
Foreign government debt		—		—		3,828		(659)		3,828		(659)
Commercial paper		491		—		3,375		(3)		3,866		(3)
Total		$	1,634,202	$	(44,345)	$	3,143,669	$	(382,232)	$	4,777,871	$	(426,577)


Unrealized loss aging for securities by type and length of time as of December 31, 2022
Table	7.5b

		Less Than 12 Months				12 Months or Greater				Total
(In thousands)		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	67,531	$	(3,583)	$	76,246	$	(6,100)	$	143,777	$	(9,683)
Obligations of U.S. states and political subdivisions		1,344,272		(157,903)		360,956		(98,170)		1,705,228		(256,073)
Corporate debt securities		1,488,255		(109,976)		758,732		(86,401)		2,246,987		(196,377)
ABS		53,201		(1,008)		67,073		(5,033)		120,274		(6,041)
RMBS		77,563		(8,572)		136,179		(17,172)		213,742		(25,744)
CMBS		166,973		(12,951)		70,792		(7,640)		237,765		(20,591)
CLOs		213,461		(4,644)		114,459		(3,185)		327,920		(7,829)
Foreign government debt		—		—		3,787		(699)		3,787		(699)
Commercial paper		—		—		3,816		(3)		3,816		(3)
Total		$	3,411,256	$	(298,637)	$	1,592,040	$	(224,403)	$	5,003,296	$	(523,040)

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Fair value measurements for items measured at fair value


Assets carried at fair value by hierarchy level as of March 31, 2023
Table	8.1a
(In thousands)		Total Fair Value			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	215,746		$	173,261	$	42,485
Obligations of U.S. states and political subdivisions		2,212,340			—		2,212,340
Corporate debt securities		2,177,942			—		2,177,942
ABS		119,371			—		119,371
RMBS		195,505			—		195,505
CMBS		231,905			—		231,905
CLOs		330,574			—		330,574
Foreign government debt		3,827			—		3,827
Commercial paper		76,843			—		76,843
Total fixed income securities		5,564,053			173,261		5,390,792
Equity securities		14,523			14,523		—
Cash equivalents		362,788		(1)	328,906		33,882
Total		$	5,941,364		$	516,690	$	5,424,674


Assets carried at fair value by hierarchy level as of December 31, 2022
Table	8.1b
(In thousands)		Total Fair Value			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
U.S. Treasury securities and obligations of U.S. government corporations and agencies		$	135,900		$	116,897	$	19,003
Obligations of U.S. states and political subdivisions		2,149,054			—		2,149,054
Corporate debt securities		2,221,141			—		2,221,141
ABS		120,687			—		120,687
RMBS		198,009			—		198,009
CMBS		237,216			—		237,216
CLOs		329,832			—		329,832
Foreign government debt		3,787			—		3,787
Commercial paper		14,072			—		14,072
Total fixed income securities		5,409,698			116,897		5,292,801
Equity securities		14,140			14,140		—
Cash equivalents		328,756		(1)	324,129		4,627
Total		$	5,752,594		$	455,166	$	5,297,428
(1) Includes restricted cash equivalents

Carrying value and fair value of financial assets and liabilities

Table 8.2 presents the carrying value and fair value of our financial assets and liabilities disclosed, but not carried, at fair value at March 31, 2023 and December 31, 2022.


Financial assets and liabilities not measured at fair value
Table	8.2
		March 31, 2023				December 31, 2022
(In thousands)		Carrying Value		Fair Value		Carrying Value		Fair Value
Financial assets
Other invested assets		$	850	$	850	$	850	$	850

Financial liabilities
5.25% Senior Notes		642,092		617,994		641,724		600,938
9% Convertible Junior Subordinated Debentures		21,086		28,196		21,086		28,085
Total financial liabilities		$	663,178	$	646,190	$	662,810	$	629,023

Other Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2023

Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]

Other comprehensive income

The pretax and related income tax benefit (expense) components of our other comprehensive income (loss) for the three months ended March 31, 2023 and 2022 are included in table 9.1 below.


Components of other comprehensive income (loss)
Table	9.1
		Three Months Ended March 31,
(In thousands)		2023		2022
Net unrealized investment gains (losses) arising during the period		$	102,099	$	(342,960)
Total income tax benefit (expense)		(21,440)		72,022
Net of taxes		80,659		(270,938)

Net changes in benefit plan assets and obligations		6,776		498
Total income tax benefit (expense)		(1,423)		(105)
Net of taxes		5,353		393

Total other comprehensive income (loss)		108,875		(342,462)
Total income tax benefit (expense)		(22,863)		71,917
Total other comprehensive income (loss), net of tax		$	86,012	$	(270,545)

Reclassification out of accumulated other comprehensive income


Reclassifications from AOCI
Table	9.2
		Three Months Ended March 31,
(In thousands)		2023		2022
Reclassification adjustment for net realized (losses) gains(1)		$	(4,164)	$	4,841
Income tax benefit (expense)		874		(1,017)
Net of taxes		(3,290)		3,824

Reclassification adjustment related to benefit plan assets and obligations (2)		(8,932)		(498)
Income tax benefit (expense)		1,876		105
Net of taxes		(7,056)		(393)

Total reclassifications		(13,096)		4,343
Income tax benefit (expense)		2,750		(912)
Total reclassifications, net of tax		$	(10,346)	$	3,431

(1)Increases (decreases) Net realized investment gains (losses) on the consolidated statements of operations.

(2)Decreases (increases) Other underwriting and operating expenses, net on the consolidated statements of operations.

Accumulated other comprehensive income (loss)

A rollforward of AOCI for the three months ended March 31, 2023, including amounts reclassified from AOCI, are included in table 9.3 below.


Rollforward of AOCI
Table	9.3
		Three Months Ended March 31, 2023
(In thousands)		Net unrealized gains and (losses) on available-for-sale securities		Net benefit plan assets and (obligations) recognized in shareholders' equity		Total accumulated other comprehensive income (loss)
Balance at December 31, 2022, net of tax		$	(408,496)	$	(73,015)	$	(481,511)
Other comprehensive income (loss) before reclassifications		77,369		(1,703)		75,666
Less: Amounts reclassified from AOCI		(3,290)		(7,056)		(10,346)
Balance, March 31, 2023, net of tax		$	(327,837)	$	(67,662)	$	(395,499)

Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

Components of net periodic benefit cost


Components of net periodic benefit cost
Table	10.1
		Three Months Ended March 31,
		Pension and Supplemental Executive Retirement Plans				Other Postretirement Benefit Plans
(In thousands)		2023		2022		2023		2022
Company service cost		$	—	$	1,757	$	386	$	348
Interest cost		3,682		2,877		398		177
Expected return on plan assets		(3,581)		(4,952)		(2,063)		(2,625)
Amortization of:
Net actuarial losses (gains)		597		1,183		(64)		(754)
Prior service cost (credit)		86		(53)		465		122
Cost of settlements and curtailments		7,847		—		—		—
Net periodic benefit cost (benefit)		$	8,631	$	812	$	(878)	$	(2,732)

Loss Reserves (Tables)

3 Months Ended

Mar. 31, 2023

Insurance Loss Reserves [Abstract]

Reconciliation of beginning and ending loss reserves

Table 11.1 provides a reconciliation of beginning and ending loss reserves as of and for the three months ended March 31, 2023 and 2022.


Development of reserves for losses and loss adjustment expenses
Table	11.1
		Three Months Ended March 31,
(In thousands)		2023		2022
Reserve at beginning of period		$	557,988	$	883,522
Less reinsurance recoverable		28,240		66,905
Net reserve at beginning of period		529,748		816,617

Losses incurred:
Losses and LAE incurred in respect of delinquency notices received in:
Current year		47,212		36,344
Prior years (1)		(40,766)		(55,658)
Total losses incurred		6,446		(19,314)

Losses paid:
Losses and LAE paid in respect of delinquency notices received in:
Current year		—		—
Prior years		10,440		10,748

Total losses paid		10,440		10,748
Net reserve at end of period		525,754		786,555
Plus reinsurance recoverable		32,761		64,717
Reserve at end of period		$	558,515	$	851,272

Prior year development of the reserves

The prior year loss reserve development for the three months of March 31, 2023 and 2022 is shown in table 11.2 below.


Reserve development on previously received delinquencies
Table	11.2
		Three Months Ended March 31,
(In thousands)		2023		2022
Increase (decrease) in estimated claim rate on primary defaults		$	(43,431)	$	(55,777)

Change in estimates related to severity on primary defaults, pool reserves, LAE reserves, reinsurance, and other		2,665		119
Total prior year loss development (1)		$	(40,766)	$	(55,658)

Rollforward of primary delinquent inventory


Delinquency inventory rollforward
Table	11.3
		Three Months Ended March 31,
		2023	2022
Delinquency inventory at beginning of period		26,387	33,290
New notices		11,297	10,703
Cures		(12,607)	(13,200)
Paid claims		(311)	(322)
Rescissions and denials		(9)	(9)

Delinquency inventory at end of period		24,757	30,462

Aging of the primary delinquent inventory

Table 11.4 below shows the number of consecutive months a borrower is delinquent. Historically as a delinquency ages it is more likely to result in a claim.


Primary delinquency inventory - consecutive months delinquent
Table	11.4
		March 31, 2023		December 31, 2022		March 31, 2022
3 months or less		7,573		8,820		7,382
4-11 months		8,563		8,217		8,131
12 months or more (1)		8,621		9,350		14,949
Total		24,757		26,387		30,462
3 months or less		31	%	33	%	24	%
4-11 months		34	%	31	%	27	%
12 months or more		35	%	36	%	49	%
Total		100	%	100	%	100	%
Primary claims received inventory included in ending delinquent inventory		296		267		217

Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of stock-based compensation, activity


Restricted stock unit grants
Table	13.1
			Three months ended March 31,
			2023			2022
			RSUs Granted (in thousands)	Weighted Average Share Fair Value		RSUs Granted (in thousands)	Weighted Average Share Fair Value
RSUs subject to performance conditions		(1)	949	$	14.17	848	$	15.46
RSUs subject only to service conditions			354	14.17		316	15.46
Non-employee director RSUs			106	14.17		97	15.46

(1)Shares granted are subject to performance conditions under which the target number of shares granted may vest up to 200%.

Statutory Information Statutory Information (Tables)

3 Months Ended

Mar. 31, 2023

Statutory Capital [Abstract]

Summary of amounts disclosed under statutory accounting practices

The statutory net income, policyholders’ surplus, and contingency reserve liability of our insurance subsidiaries, including MGIC, are shown in table 14.1.


Financial information of our insurance subsidiaries (including MGIC)
Table 14.1
	As of and for the Three Months Ended March 31,
(In thousands)	2023		2022
Statutory net income	$	54,612	$	96,018
Statutory policyholders' surplus	992,075		1,319,633
Contingency reserve	4,803,752		4,263,599

- Definition

Tabular disclosure of how the entity's reporting under GAAP as of the balance sheet date differs from the results based on prescribed and permitted accounting practices of the state or country of domicile in which a relevant statutory filing is made, or differences in results based on the National Association of Insurance Commissioners (NAIC) prescribed practices, or a combination thereof. Describes the accounting practices used and the related monetary effect on statutory surplus, net income, and risk-based capital. If an insurance enterprise's risk-based capital would have triggered a regulatory event had it not used a permitted practice, that fact is disclosed in the financial statements. Permitted statutory accounting practices include practices not prescribed but allowed by the domiciliary state insurance department regulatory authority.

+ References + Details

Debt - Summary of Debt Obligations (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt, carrying value	$ 663.2	$ 662.8
Senior Notes \| 5.25% Senior Notes Due 2028
Debt Instrument [Line Items]
Long-term debt, carrying value	$ 642.1	641.7
Stated interest rate	5.25%
Debt instrument, face amount	$ 650.0
9% Convertible Junior Subordinated Debentures
Debt Instrument [Line Items]
Long-term debt, carrying value	$ 21.1	$ 21.1
Stated interest rate	9.00%

- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References + Details

Debt - Narrative (Details)	3 Months Ended
Debt - Narrative (Details)	Mar. 31, 2023 USD ($) $ / shares	Mar. 31, 2022 USD ($)
Debt Instrument [Line Items]
Total interest payments	$ 17,100,000	$ 26,700,000
9% Convertible Junior Subordinated Debentures
Debt Instrument [Line Items]
Conversion rate (in shares per $1,000 note)	0.077962
Principal amount of notes used in determining conversion rate	$ 1,000
Convertible debt, conversion price (in dollars per share) \| $ / shares	$ 12.83

Reinsurance - Summary of Premiums Earned and Losses Incurred (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Premiums earned:
Direct	$ 286,034	$ 287,273
Assumed	2,787	2,126
Ceded	(46,806)	(34,159)
Net premiums earned	242,015	255,240
Losses incurred:
Direct	11,123	(21,092)
Assumed	4	(207)
Losses incurred, net	6,446	(19,314)
Quota Share Reinsurance Transactions
Premiums earned:
Ceded	(29,877)	(22,378)
Losses incurred:
Ceded	(4,681)	1,985
Profit commission on reinsurance	31,711	38,980
Ceding commission on reinsurance	12,318	12,272
Excess of Loss Reinsurance Transactions
Premiums earned:
Ceded	$ (16,929)	$ (11,781)

Reinsurance - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
Reinsurance - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Effects of Reinsurance [Line Items]
Reinsurance recoverable on loss reserves	$ 32,761	$ 28,240	$ 64,717	$ 66,905
Quota Share Reinsurance Transactions
Effects of Reinsurance [Line Items]
Ceding commission, percentage (as a percent)	20.00%
Reinsurance, quote share reinsurance agreement, annual loss ratio cap (as a percent)	300.00%
Reinsurance, quota reinsurance agreement, lifetime loss ratio cap (as a percent)	200.00%
Threshold for private mortgage insurer eligibility requirements for termination election (less than) (as a percent)	90.00%
Reinsurance recoverable on loss reserves	$ 32,800	$ 28,200
Credit Union QSR Transaction
Effects of Reinsurance [Line Items]
Threshold for private mortgage insurer eligibility requirements for termination election (less than) (as a percent)	80.00%
Aggregate Excess of Loss Reinsurance Transactions, Home Re \| Minimum
Effects of Reinsurance [Line Items]
Amortization period excess of loss reinsurance coverage	10 years
Aggregate Excess of Loss Reinsurance Transactions, Home Re \| Maximum
Effects of Reinsurance [Line Items]
Amortization period excess of loss reinsurance coverage	12 years 6 months
Home Re special purpose insurers
Effects of Reinsurance [Line Items]
Percent of total trust assets invested in cash or direct U.S. federal government obligations	99.50%

Reinsurance - Quota Share Transactions Terms (Details)	3 Months Ended
Reinsurance - Quota Share Transactions Terms (Details)	Mar. 31, 2023
2020 QSR
Effects of Reinsurance [Line Items]
Quota share for all policies covered (as a percent)	12.50%
Loss ratio threshold for profit commissions (as a percent)	62.00%
Cede rate, option 1 (as a percent)	10.50%
Cede rate, option 2 (as a percent)	8.00%
2020 and 2021 QSR - 2020 NIW
Effects of Reinsurance [Line Items]
Quota share for all policies covered (as a percent)	17.50%
Loss ratio threshold for profit commissions (as a percent)	62.00%
Cede rate, option 1 (as a percent)	14.50%
Cede rate, option 2 (as a percent)	12.00%
2020 and 2021 QSR - 2021 NIW
Effects of Reinsurance [Line Items]
Quota share for all policies covered (as a percent)	17.50%
Loss ratio threshold for profit commissions (as a percent)	61.90%
Cede rate, option 1 (as a percent)	14.50%
Cede rate, option 2 (as a percent)	12.00%
2021 and 2022 QSR - 2021 NIW
Effects of Reinsurance [Line Items]
Quota share for all policies covered (as a percent)	12.50%
Loss ratio threshold for profit commissions (as a percent)	57.50%
Cede rate, option 1 (as a percent)	10.50%
Cede rate, option 2 (as a percent)	8.00%
2021 and 2022 QSR - 2022 NIW
Effects of Reinsurance [Line Items]
Quota share for all policies covered (as a percent)	15.00%
Loss ratio threshold for profit commissions (as a percent)	57.50%
Cede rate, option 1 (as a percent)	12.50%
Cede rate, option 2 (as a percent)	10.00%
2022 and 2023 QSR - 2022 NIW
Effects of Reinsurance [Line Items]
Quota share for all policies covered (as a percent)	15.00%
Loss ratio threshold for profit commissions (as a percent)	62.00%
Cede rate, option 1 (as a percent)	12.50%
Cede rate, option 2 (as a percent)	10.00%
2022 and 2023 QSR - 2023 NIW
Effects of Reinsurance [Line Items]
Quota share for all policies covered (as a percent)	15.00%
Loss ratio threshold for profit commissions (as a percent)	62.00%
Cede rate, option 1 (as a percent)	12.50%
Cede rate, option 2 (as a percent)	10.00%
2023 QSR
Effects of Reinsurance [Line Items]
Quota share for all policies covered (as a percent)	10.00%
Loss ratio threshold for profit commissions (as a percent)	58.50%
Cede rate, option 1 (as a percent)	8.00%
Cede rate, option 2 (as a percent)	7.00%
Credit Union QSR Transaction
Effects of Reinsurance [Line Items]
Quota share for all policies covered (as a percent)	65.00%
Loss ratio threshold for profit commissions (as a percent)	50.00%

Reinsurance - Excess of Loss Reinsurance (Details) - USD ($) $ in Thousands								3 Months Ended	12 Months Ended
	Apr. 26, 2022	Apr. 01, 2022	Aug. 03, 2021	Feb. 02, 2021	Oct. 29, 2020	May 25, 2019	Oct. 30, 2018	Mar. 31, 2023	Dec. 31, 2022
2022 Traditional XOL
Effects of Reinsurance [Line Items]
Amortization period excess of loss reinsurance coverage		10 years
Initial first layer retention		$ 82,523
Remaining first layer retention								$ 82,509	$ 82,517
Excess of loss reinsurance coverage, initial and remaining		$ 142,642						142,642	142,642
Home Re 2022-1
Effects of Reinsurance [Line Items]
Term of mortgage insurance-linked notes	12 years 6 months
Initial first layer retention	$ 325,589
Remaining first layer retention								325,520	325,576
Excess of loss reinsurance coverage, initial and remaining	$ 473,575							473,575	473,575
Home Re 2021-2
Effects of Reinsurance [Line Items]
Term of mortgage insurance-linked notes			12 years 6 months
Initial first layer retention			$ 190,159
Remaining first layer retention								190,016	190,097
Excess of loss reinsurance coverage, initial and remaining			$ 398,429					327,346	352,084
Home Re 2021-1
Effects of Reinsurance [Line Items]
Term of mortgage insurance-linked notes				12 years 6 months
Initial first layer retention				$ 211,159
Remaining first layer retention								211,055	211,102
Excess of loss reinsurance coverage, initial and remaining				$ 398,848				251,942	277,053
Home Re 2020-1
Effects of Reinsurance [Line Items]
Term of mortgage insurance-linked notes					10 years
Initial first layer retention					$ 275,283
Remaining first layer retention								274,979	274,871
Excess of loss reinsurance coverage, initial and remaining					$ 412,917			92,648	113,247
Home Re 2019-1
Effects of Reinsurance [Line Items]
Term of mortgage insurance-linked notes						10 years
Initial first layer retention						$ 185,730
Remaining first layer retention								183,351	183,540
Excess of loss reinsurance coverage, initial and remaining						$ 315,739		208,146	208,146
Home Re 2018-1
Effects of Reinsurance [Line Items]
Term of mortgage insurance-linked notes							10 years
Initial first layer retention							$ 168,691
Remaining first layer retention								164,708	164,849
Excess of loss reinsurance coverage, initial and remaining							$ 318,636	$ 121,513	$ 140,993

Reinsurance - Variable Interest Entity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Effects of Reinsurance [Line Items]
Assets	$ 6,352,288	$ 6,213,793
Home Re 2022-1
Effects of Reinsurance [Line Items]
Assets	473,575	473,575
Home Re 2021-2
Effects of Reinsurance [Line Items]
Assets	337,486	357,340
Home Re 2021-1
Effects of Reinsurance [Line Items]
Assets	260,680	285,039
Home Re 2020-1
Effects of Reinsurance [Line Items]
Assets	100,561	119,159
Home Re 2019-1
Effects of Reinsurance [Line Items]
Assets	208,146	208,146
Home Re 2018-1
Effects of Reinsurance [Line Items]
Assets	$ 128,995	$ 146,822

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
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-URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Section 50
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-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
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-Subparagraph (SX 210.13-01(a)(4)(ii))
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (bb)
-URI https://asc.fasb.org/extlink&oid=123419778&loc=d3e5710-111685

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (d)
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Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
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Reference 22: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(18))
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Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
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-Section 50
-Paragraph 3
-Subparagraph (c)
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Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599

+ Details

Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Basic earnings per share:
Net income	$ 154,547	$ 175,013
Weighted average common shares outstanding - basic (in shares)	290,989	315,975
Basic earnings per share (in dollars per share)	$ 0.53	$ 0.55
Diluted earnings per share:
Net income	$ 154,547	$ 175,013
Diluted income available to common shareholders	$ 154,922	$ 176,525
Weighted average common shares outstanding - basic (in shares)	290,989	315,975
Effect of dilutive securities:
Weighted average common shares outstanding - diluted (in shares)	294,712	324,538
Diluted earnings per share (in dollars per share)	$ 0.53	$ 0.54
Federal statutory income tax rate (in hundredths)	21.00%	21.00%
9% Convertible Junior Subordinated Debentures
Diluted earnings per share:
Dilutive securities	$ 375	$ 1,512
Effect of dilutive securities:
Dilutive securities (in shares)	1,644	6,534
Stated interest rate	9.00%
Unvested RSUs
Effect of dilutive securities:
Unvested RSUs (in shares)	2,079	2,029

Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 5,979,045	$ 5,926,785
Fair Value	5,564,053	5,409,698
Assets held by insurance regulatory requirements	12,100	11,800
Assets held in trust for the benefit of contractual counterparties	130,700	128,400
Total fixed income securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,979,045	5,926,785
Gross Unrealized Gains	11,585	5,953
Gross Unrealized Losses	(426,577)	(523,040)
Fair Value	5,564,053	5,409,698
U.S. Treasury securities and obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	223,428	145,581
Gross Unrealized Gains	31	2
Gross Unrealized Losses	(7,713)	(9,683)
Fair Value	215,746	135,900
Obligations of U.S. states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,403,603	2,400,261
Gross Unrealized Gains	9,776	4,866
Gross Unrealized Losses	(201,039)	(256,073)
Fair Value	2,212,340	2,149,054
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,341,134	2,416,475
Gross Unrealized Gains	1,733	1,043
Gross Unrealized Losses	(164,925)	(196,377)
Fair Value	2,177,942	2,221,141
ABS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	124,175	126,723
Gross Unrealized Gains	15	5
Gross Unrealized Losses	(4,819)	(6,041)
Fair Value	119,371	120,687
RMBS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	217,751	223,743
Gross Unrealized Gains	10	10
Gross Unrealized Losses	(22,256)	(25,744)
Fair Value	195,505	198,009
CMBS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	250,589	257,785
Gross Unrealized Gains	20	22
Gross Unrealized Losses	(18,704)	(20,591)
Fair Value	231,905	237,216
CLOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	337,033	337,656
Gross Unrealized Gains	0	5
Gross Unrealized Losses	(6,459)	(7,829)
Fair Value	330,574	329,832
Foreign government debt
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,486	4,486
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(659)	(699)
Fair Value	3,827	3,787
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	76,846	14,075
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(3)	(3)
Fair Value	$ 76,843	$ 14,072

Investments - Amortized Cost and Fair Values of Debt Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Amortized cost
Due in one year or less	$ 667,113
Due after one year through five years	1,362,173
Due after five years through ten years	1,831,636
Due after ten years	1,188,575
Total debt securities with single maturity date, amortized cost	5,049,497
Amortized Cost	5,979,045	$ 5,926,785
Fair Value
Due in one year or less	657,832
Due after one year through five years	1,300,280
Due after five years through ten years	1,693,166
Due after ten years	1,035,420
Total debt securities with single maturity date, fair value	4,686,698
Total at end of period	5,564,053	5,409,698
ABS
Amortized cost
Total debt securities without single maturity date, amortized cost	124,175
Amortized Cost	124,175	126,723
Fair Value
Total debt securities without single maturity date, fair value	119,371
Total at end of period	119,371	120,687
RMBS
Amortized cost
Total debt securities without single maturity date, amortized cost	217,751
Amortized Cost	217,751	223,743
Fair Value
Total debt securities without single maturity date, fair value	195,505
Total at end of period	195,505	198,009
CMBS
Amortized cost
Total debt securities without single maturity date, amortized cost	250,589
Amortized Cost	250,589	257,785
Fair Value
Total debt securities without single maturity date, fair value	231,905
Total at end of period	231,905	237,216
CLOs
Amortized cost
Total debt securities without single maturity date, amortized cost	337,033
Amortized Cost	337,033	337,656
Fair Value
Total debt securities without single maturity date, fair value	330,574
Total at end of period	$ 330,574	$ 329,832

Investments - Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Equity Securities, FV-NI, Gain (Loss) [Abstract]
Cost	$ 15,946	$ 15,924
Gross Gains	2	0
Gross Losses	(1,425)	(1,784)
Equity securities	$ 14,523	$ 14,140

Investments - Net Gains (Losses) On Investments and Other Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Fixed income securities
Gross realized gains on sales of fixed income securities	$ 59	$ 4,134
Gross realized losses on sales of fixed income securities	(4,133)	(4,657)
Equity securities gains (losses)
Equity securities, gains (losses), market adjustment	360	(1,005)
Change in embedded derivative on Home Re Transactions (1)	(3,976)	733
Other
Other, gains (losses) on sales	6	11
Other, market adjustment	(14)	12
Net gains (losses) on investments and other financial instruments	(7,698)	(772)
Proceeds from sales of fixed income securities	32,181	216,824
Proceeds from sales of equity securities	$ 0	$ 0

Investments - Securities In Unrealized Loss Position (Details) $ in Thousands	Mar. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Schedule of Investments [Line Items]
Less Than 12 Months - Fair Value	$ 1,634,202	$ 3,411,256
12 Months or Greater - Fair Value	3,143,669	1,592,040
Total - Fair Value	4,777,871	5,003,296
Less Than 12 Months - Unrealized Losses	(44,345)	(298,637)
12 Months or Greater - Unrealized Losses	(382,232)	(224,403)
Total - Unrealized Losses	$ (426,577)	$ (523,040)
Number of securities in unrealized loss position (in securities) \| security	1,152	1,226
U.S. Treasury securities and obligations of U.S. government corporations and agencies
Schedule of Investments [Line Items]
Less Than 12 Months - Fair Value	$ 59,935	$ 67,531
12 Months or Greater - Fair Value	84,568	76,246
Total - Fair Value	144,503	143,777
Less Than 12 Months - Unrealized Losses	(1,108)	(3,583)
12 Months or Greater - Unrealized Losses	(6,605)	(6,100)
Total - Unrealized Losses	(7,713)	(9,683)
Obligations of U.S. states and political subdivisions
Schedule of Investments [Line Items]
Less Than 12 Months - Fair Value	615,219	1,344,272
12 Months or Greater - Fair Value	962,757	360,956
Total - Fair Value	1,577,976	1,705,228
Less Than 12 Months - Unrealized Losses	(13,633)	(157,903)
12 Months or Greater - Unrealized Losses	(187,406)	(98,170)
Total - Unrealized Losses	(201,039)	(256,073)
Corporate debt securities
Schedule of Investments [Line Items]
Less Than 12 Months - Fair Value	889,684	1,488,255
12 Months or Greater - Fair Value	1,269,912	758,732
Total - Fair Value	2,159,596	2,246,987
Less Than 12 Months - Unrealized Losses	(28,273)	(109,976)
12 Months or Greater - Unrealized Losses	(136,652)	(86,401)
Total - Unrealized Losses	(164,925)	(196,377)
ABS
Schedule of Investments [Line Items]
Less Than 12 Months - Fair Value	36,028	53,201
12 Months or Greater - Fair Value	77,206	67,073
Total - Fair Value	113,234	120,274
Less Than 12 Months - Unrealized Losses	(245)	(1,008)
12 Months or Greater - Unrealized Losses	(4,574)	(5,033)
Total - Unrealized Losses	(4,819)	(6,041)
RMBS
Schedule of Investments [Line Items]
Less Than 12 Months - Fair Value	4,078	77,563
12 Months or Greater - Fair Value	207,258	136,179
Total - Fair Value	211,336	213,742
Less Than 12 Months - Unrealized Losses	(177)	(8,572)
12 Months or Greater - Unrealized Losses	(22,079)	(17,172)
Total - Unrealized Losses	(22,256)	(25,744)
CMBS
Schedule of Investments [Line Items]
Less Than 12 Months - Fair Value	11,699	166,973
12 Months or Greater - Fair Value	221,259	70,792
Total - Fair Value	232,958	237,765
Less Than 12 Months - Unrealized Losses	(714)	(12,951)
12 Months or Greater - Unrealized Losses	(17,990)	(7,640)
Total - Unrealized Losses	(18,704)	(20,591)
CLOs
Schedule of Investments [Line Items]
Less Than 12 Months - Fair Value	17,068	213,461
12 Months or Greater - Fair Value	313,506	114,459
Total - Fair Value	330,574	327,920
Less Than 12 Months - Unrealized Losses	(195)	(4,644)
12 Months or Greater - Unrealized Losses	(6,264)	(3,185)
Total - Unrealized Losses	(6,459)	(7,829)
Foreign government debt
Schedule of Investments [Line Items]
Less Than 12 Months - Fair Value	0	0
12 Months or Greater - Fair Value	3,828	3,787
Total - Fair Value	3,828	3,787
Less Than 12 Months - Unrealized Losses	0	0
12 Months or Greater - Unrealized Losses	(659)	(699)
Total - Unrealized Losses	(659)	(699)
Commercial paper
Schedule of Investments [Line Items]
Less Than 12 Months - Fair Value	491	0
12 Months or Greater - Fair Value	3,375	3,816
Total - Fair Value	3,866	3,816
Less Than 12 Months - Unrealized Losses	0	0
12 Months or Greater - Unrealized Losses	(3)	(3)
Total - Unrealized Losses	$ (3)	$ (3)

Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 5,564,053		$ 5,409,698
Equity securities	14,523		14,140
Real Estate Acquired
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Purchases of real estate assets acquired	100	$ 500
Sales of real estate assets acquired	1,200	$ 1,000
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	14,523		14,140
Cash equivalents	362,788		328,756
Total assets	5,941,364		5,752,594
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	14,523		14,140
Cash equivalents	328,906		324,129
Total assets	516,690		455,166
Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities	0		0
Cash equivalents	33,882		4,627
Total assets	5,424,674		5,297,428
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivative related to Home Re transactions	(1,500)		2,500
Total fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	5,564,053		5,409,698
Total fixed income securities \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	5,564,053		5,409,698
Total fixed income securities \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	173,261		116,897
Total fixed income securities \| Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	5,390,792		5,292,801
U.S. Treasury securities and obligations of U.S. government corporations and agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	215,746		135,900
U.S. Treasury securities and obligations of U.S. government corporations and agencies \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	215,746		135,900
U.S. Treasury securities and obligations of U.S. government corporations and agencies \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	173,261		116,897
U.S. Treasury securities and obligations of U.S. government corporations and agencies \| Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	42,485		19,003
Obligations of U.S. states and political subdivisions
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,212,340		2,149,054
Obligations of U.S. states and political subdivisions \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,212,340		2,149,054
Obligations of U.S. states and political subdivisions \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0		0
Obligations of U.S. states and political subdivisions \| Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,212,340		2,149,054
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,177,942		2,221,141
Corporate debt securities \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,177,942		2,221,141
Corporate debt securities \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0		0
Corporate debt securities \| Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	2,177,942		2,221,141
ABS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	119,371		120,687
ABS \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	119,371		120,687
ABS \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0		0
ABS \| Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	119,371		120,687
RMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	195,505		198,009
RMBS \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	195,505		198,009
RMBS \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0		0
RMBS \| Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	195,505		198,009
CMBS
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	231,905		237,216
CMBS \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	231,905		237,216
CMBS \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0		0
CMBS \| Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	231,905		237,216
CLOs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	330,574		329,832
CLOs \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	330,574		329,832
CLOs \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0		0
CLOs \| Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	330,574		329,832
Foreign government debt
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	3,827		3,787
Foreign government debt \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	3,827		3,787
Foreign government debt \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0		0
Foreign government debt \| Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	3,827		3,787
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	76,843		14,072
Commercial paper \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	76,843		14,072
Commercial paper \| Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	0		0
Commercial paper \| Significant Other Observable Inputs (Level 2) \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 76,843		$ 14,072

Fair Value Measurements - Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other invested assets	$ 850	$ 850
9% Convertible Junior Subordinated Debentures	21,086	21,086
Total financial liabilities	663,178	662,810
Fair Value \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other invested assets	850	850
9% Convertible Junior Subordinated Debentures	28,196	28,085
Total financial liabilities	$ 646,190	629,023
Senior Notes \| 5.25% Senior Notes Due 2028
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate	5.25%
Senior Notes \| 5.25% Senior Notes Due 2028 \| Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes Payable	$ 642,092	641,724
Senior Notes \| 5.25% Senior Notes Due 2028 \| Fair Value \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes Payable	$ 617,994	$ 600,938
9% Convertible Junior Subordinated Debentures
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Stated interest rate	9.00%

Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total other comprehensive income (loss)	$ 108,875	$ (342,462)
Income tax benefit (expense)	(22,863)	71,917
Other comprehensive income (loss), net of tax	86,012	(270,545)
Amounts Reclassified From Accumulated Other Comprehensive Income [Abstract]
Total reclassifications before tax	195,604	219,439
Income tax benefit (expense)	(41,057)	(44,426)
Total reclassifications, net of tax	154,547	175,013
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	4,642,740
Other comprehensive income (loss) before reclassifications	75,666
Less: Amounts reclassified from AOCI	(10,346)
Balance, end of period	4,777,644	4,610,355
Reclassification from Accumulated Other Comprehensive Income
Amounts Reclassified From Accumulated Other Comprehensive Income [Abstract]
Total reclassifications before tax	(13,096)	4,343
Income tax benefit (expense)	2,750	(912)
Total reclassifications, net of tax	(10,346)	3,431
Accumulated other comprehensive income (loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other comprehensive income (loss), net of tax	86,012	(270,545)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(481,511)	119,697
Balance, end of period	(395,499)	(150,848)
Net unrealized gains and (losses) on available-for-sale securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total other comprehensive income (loss)	102,099	(342,960)
Income tax benefit (expense)	(21,440)	72,022
Other comprehensive income (loss), net of tax	80,659	(270,938)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(408,496)
Other comprehensive income (loss) before reclassifications	77,369
Less: Amounts reclassified from AOCI	(3,290)
Balance, end of period	(327,837)
Net unrealized gains and (losses) on available-for-sale securities \| Reclassification from Accumulated Other Comprehensive Income
Amounts Reclassified From Accumulated Other Comprehensive Income [Abstract]
Total reclassifications before tax	(4,164)	4,841
Income tax benefit (expense)	874	(1,017)
Total reclassifications, net of tax	(3,290)	3,824
Net benefit plan assets and (obligations) recognized in shareholders' equity
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total other comprehensive income (loss)	6,776	498
Income tax benefit (expense)	(1,423)	(105)
Other comprehensive income (loss), net of tax	5,353	393
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(73,015)
Other comprehensive income (loss) before reclassifications	(1,703)
Less: Amounts reclassified from AOCI	(7,056)
Balance, end of period	(67,662)
Net benefit plan assets and (obligations) recognized in shareholders' equity \| Reclassification from Accumulated Other Comprehensive Income
Amounts Reclassified From Accumulated Other Comprehensive Income [Abstract]
Total reclassifications before tax	(8,932)	(498)
Income tax benefit (expense)	1,876	105
Total reclassifications, net of tax	$ (7,056)	$ (393)

Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended
Benefit Plans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022
Pension and Supplemental Executive Retirement Plans
Components of Net Periodic Benefit Cost [Abstract]
Company service cost	$ 0	$ 1,757
Interest cost	3,682	2,877
Expected return on plan assets	(3,581)	(4,952)
Net actuarial losses (gains)	597	1,183
Prior service cost (credit)	86	(53)
Cost of settlements and curtailments	7,847	0
Net periodic benefit cost (benefit)	8,631	812
Other Postretirement Benefit Plans
Components of Net Periodic Benefit Cost [Abstract]
Company service cost	386	348
Interest cost	398	177
Expected return on plan assets	(2,063)	(2,625)
Net actuarial losses (gains)	(64)	(754)
Prior service cost (credit)	465	122
Cost of settlements and curtailments	0	0
Net periodic benefit cost (benefit)	$ (878)	$ (2,732)

Loss Reserves (Details) $ in Thousands	3 Months Ended
Loss Reserves (Details) $ in Thousands	Mar. 31, 2023 USD ($) loan	Mar. 31, 2022 USD ($) loan	Dec. 31, 2022 USD ($)
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Increase (decrease) in loss reserves	$ 527	$ (32,250)
Losses incurred related to current year notices	47,212	36,344
Losses incurred related to prior year notices	(40,766)	$ (55,658)
Premium refund liability, expected claim payments	$ 24,200		$ 25,500
Primary Delinquent Inventory [Roll Forward]
Delinquent inventory at the beginning of period (in loans) \| loan	26,387	33,290
New notices (in loans) \| loan	11,297	10,703
Cures (in loans) \| loan	(12,607)	(13,200)
Paid claims (in loans) \| loan	(311)	(322)
Rescissions and denials (in loans) \| loan	(9)	(9)
Delinquent inventory at end of period (in loans) \| loan	24,757	30,462
$1,000 Increase/Decrease In Average Severity Reserve Factor
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Increase (decrease) in loss reserves	$ 9,000
One Percentage Point Increase/Decrease In Average Claim Rate Reserve Factor
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Increase (decrease) in loss reserves	15,000
Increase (decrease) in estimated claim rate on primary defaults
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Losses incurred related to prior year notices	(43,431)	$ (55,777)
Change in estimates related to severity on primary defaults, pool reserves, LAE reserves, reinsurance, and other
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Losses incurred related to prior year notices	$ 2,665	$ 119

Loss Reserves - Reconciliation of Beginning and Ending Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Loss Reserve [Roll Forward]
Reserve at beginning of period	$ 557,988	$ 883,522
Less reinsurance recoverable	28,240	66,905
Net reserve at beginning of period	529,748	816,617
Losses and LAE incurred in respect of delinquency notices received in:
Current year	47,212	36,344
Prior years	(40,766)	(55,658)
Total losses incurred	6,446	(19,314)
Losses and LAE paid in respect of delinquency notices received in:
Current year	0	0
Prior years	10,440	10,748
Total losses paid	10,440	10,748
Net reserve at end of period	525,754	786,555
Plus reinsurance recoverable	32,761	64,717
Reserve at end of period	$ 558,515	$ 851,272

Loss Reserves - Delinquent Items (Details) - loan	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Aging of the Primary Delinquent Inventory [Abstract]
3 months or less (in loans)	7,573	8,820	7,382
4 - 11 months (in loans)	8,563	8,217	8,131
12 months or more (in loans)	8,621	9,350	14,949
Total primary delinquent inventory (in loans)	24,757	26,387	30,462	33,290
3 months or less (as a percent)	31.00%	33.00%	24.00%
4 - 11 months (as a percent)	34.00%	31.00%	27.00%
12 months or more (as a percent)	35.00%	36.00%	49.00%
Total primary delinquent inventory (as a percent)	100.00%	100.00%	100.00%
Primary claims received inventory included in ending delinquent inventory (in loans)	296	267	217
Percent of 12 months or more delinquent inventory, delinquent for more than 36 months (as a percent)	38.00%	36.00%	23.00%

Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions		1 Months Ended	3 Months Ended		12 Months Ended
	Apr. 27, 2023	Apr. 30, 2023	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Class of Stock [Line Items]
Shares repurchased in period (in shares)			5.8		27.8
Shares repurchased, weighted average price per share			$ 13.43		$ 13.89
Remaining authorized repurchase amount			$ 36,000
Repurchase of common stock			$ 76,151	$ 123,640
Quarterly cash dividend paid (per share)			$ 0.10
Cash dividends			$ 29,600
Subsequent Event
Class of Stock [Line Items]
Shares repurchased in period (in shares)		1.7
Repurchase of common stock		$ 24,400
Stock repurchase program, authorized amount through 2025	$ 500,000
Quarterly cash dividend declared (per share)	$ 0.10

Share-Based Compensation (Details) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
RSUs subject to performance conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	949	848
Weighted Average Share Fair Value (in dollars per share)	$ 14.17	$ 15.46
Share-based compensation arrangement, maximum vesting percent of shares granted	200.00%
RSUs subject only to service conditions
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	354	316
Weighted Average Share Fair Value (in dollars per share)	$ 14.17	$ 15.46
Non-employee director RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	106	97
Weighted Average Share Fair Value (in dollars per share)	$ 14.17	$ 15.46
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	1 year
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years

Statutory Information (Details) $ in Millions	1 Months Ended	3 Months Ended
Statutory Information (Details) $ in Millions	May 31, 2023 USD ($)	Mar. 31, 2023 USD ($) jurisdiction
Statutory capital requirements [Abstract]
Number of jurisdictions with risk-to-capital requirements (in jurisdictions) \| jurisdiction		16
Maximum permitted risk-to-capital ratio commonly applied		25 to 1
Mortgage Guaranty Insurance Corporation
Statutory capital requirements [Abstract]
Maximum risk-to-capital ratio		25
Risk to capital ratio at end of period		9.7 to 1
Risk-to-capital ratio		9.7
Amount of policyholders position above or below required MPP		$ 3,700
Amount of required MPP		$ 2,100
Percentage of statutory policyholders surplus used to determine maximum allowable dividends (as a percent)		10.00%
Adjusted statutory net income measurement period (in years)		3 years
Adjusted statutory net income dividend payment measurement period (in years)		2 years
Mortgage Guaranty Insurance Corporation \| Subsequent Event
Statutory capital requirements [Abstract]
Dividend paid to the holding company	$ 300

Statutory Information - Summary of Amounts Disclosed Under Statutory Accounting Practices (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statutory Capital [Abstract]
Statutory net income	$ 54,612	$ 96,018
Statutory policyholders' surplus	992,075	1,319,633
Contingency reserve	$ 4,803,752	$ 4,263,599