Mercury General (MCY) 10-K13 Feb 242023 FY Annual reportFinancial data

Company Profile

Cover Page

Cover Page - USD ($)	12 Months Ended
Cover Page - USD ($)	Dec. 31, 2023	Feb. 08, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-12257
Entity Registrant Name	MERCURY GENERAL CORPORATION
Entity Incorporation, State or Country Code	CA
Entity Tax Identification Number	95-2211612
Entity Address, Address Line One	4484 Wilshire Boulevard
Entity Address, City or Town	Los Angeles,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90010
City Area Code	323
Local Phone Number	937-1060
Title of 12(b) Security	Common Stock
Trading Symbol	MCY
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 803,841,584
Entity Common Stock, Shares Outstanding		55,371,127
Documents Incorporated by Reference	Certain information from the registrant’s definitive proxy statement for the 2024 Annual Meeting of Shareholders is incorporated herein by reference into Part III hereof.
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Entity Central Index Key	0000064996

Audit Information

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2023
Auditor Information [Abstract]
Auditor Firm ID	185
Auditor Name	KPMG LLP
Auditor Location	Los Angeles, California

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
ASSETS
Fixed maturity securities (amortized cost $4,394,983; $4,226,790)	$ 4,319,336	$ 4,088,311
Equity securities (cost $654,939; $668,843)	730,693	699,552
Short-term investments (cost $179,375; $123,928)	178,491	122,937
Total investments	5,228,520	4,910,800
Cash	550,903	289,776
Receivables:
Premiums	607,025	571,910
Allowance for credit losses on premiums receivable	(5,300)	(5,800)
Premiums receivable, net of allowance for credit losses	601,725	566,110
Accrued investment income	59,128	52,474
Other	25,603	11,358
Total receivables	686,456	629,942
Reinsurance recoverables (net of allowance for credit losses $12; $0)	31,947	25,895
Deferred policy acquisition costs	293,844	266,475
Fixed assets, net	151,183	171,442
Operating lease right-of-use assets	14,406	20,183
Current income taxes	4,081	55,136
Deferred income taxes	33,013	42,903
Goodwill	42,796	42,796
Other intangible assets, net	8,333	9,212
Other assets	57,915	49,628
Total assets	7,103,397	6,514,188
Liabilities
Loss and loss adjustment expense reserves	2,785,702	2,584,910
Unearned premiums	1,735,660	1,545,639
Notes payable	573,729	398,330
Accounts payable and accrued expenses	175,219	151,686
Operating lease liabilities	14,231	21,924
Other liabilities	270,711	289,568
Total liabilities	5,555,252	4,992,057
Commitments and contingencies
Shareholders’ equity:
Common stock without par value or stated value, Authorized 70,000 shares; issued and outstanding 55,371; 55,371	98,947	98,947
Retained earnings	1,449,198	1,423,184
Total shareholders’ equity	1,548,145	1,522,131
Total liabilities and shareholders’ equity	$ 7,103,397	$ 6,514,188

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Amortized cost on fixed maturities trading investments	$ 4,394,983	$ 4,226,790
Cost - equity security trading investments	654,939	668,843
Cost - short-term investments	179,375	123,928
Reinsurance recoverable, allowance for credit losses	$ (12)	$ 0
Common Stock
Common stock, shares authorized (in shares)	70,000,000	70,000,000
Common stock, shares issued (in shares)	55,371,000	55,371,000
Common stock, shares outstanding (in shares)	55,371,000	55,371,000

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Net premiums earned	$ 4,274,378	$ 3,952,482	$ 3,741,948
Net investment income	234,630	168,356	129,727
Net realized investment gains (losses)	101,014	(488,080)	111,658
Other	19,609	10,308	10,024
Total revenues	4,629,631	3,643,066	3,993,357
Expenses:
Losses and loss adjustment expenses	3,517,853	3,362,219	2,760,155
Policy acquisition costs	708,525	654,612	633,385
Other operating expenses	279,656	279,718	283,397
Interest	24,169	17,232	17,113
Total expenses	4,530,203	4,313,781	3,694,050
Income (loss) before income taxes	99,428	(670,715)	299,307
Income tax expense (benefit)	3,092	(158,043)	51,370
Net income (loss)	$ 96,336	$ (512,672)	$ 247,937
Net income (loss) per share:
Basic (in dollars per share)	$ 1.74	$ (9.26)	$ 4.48
Diluted (in dollars per share)	$ 1.74	$ (9.26)	$ 4.48

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common stock	Retained Earnings
Shareholders' equity, beginning balance at Dec. 31, 2020		$ 98,970	$ 1,933,627
Proceeds of stock options exercised		215
Share-based compensation expense		141
Withholding tax on stock options exercised		(383)
Net income (loss)	$ 247,937		247,937
Dividends paid to shareholders			(140,226)
Shareholders' equity, ending balance at Dec. 31, 2021	2,140,281	98,943	2,041,338
Proceeds of stock options exercised		0
Share-based compensation expense		15
Withholding tax on stock options exercised		(11)
Net income (loss)	(512,672)		(512,672)
Dividends paid to shareholders			(105,482)
Shareholders' equity, ending balance at Dec. 31, 2022	1,522,131	98,947	1,423,184
Proceeds of stock options exercised		0
Share-based compensation expense		0
Withholding tax on stock options exercised		0
Net income (loss)	96,336		96,336
Dividends paid to shareholders			(70,322)
Shareholders' equity, ending balance at Dec. 31, 2023	$ 1,548,145	$ 98,947	$ 1,449,198

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 96,336	$ (512,672)	$ 247,937
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	72,240	82,390	79,056
Net realized investment (gains) losses	(101,014)	488,080	(111,658)
Net (gains) losses on sales of fixed assets	(5,879)	86	(17)
Loss on property held for sale	0	841	0
(Increase) decrease in premiums receivable	(35,615)	49,630	(26,670)
(Increase) decrease in reinsurance recoverables	(6,052)	19,105	3,488
Changes in current and deferred income taxes	60,945	(131,500)	(18,097)
Increase in deferred policy acquisition costs	(27,369)	(8,216)	(11,265)
Increase in loss and loss adjustment expense reserves	200,792	358,480	235,126
Increase in unearned premiums	190,021	25,840	113,926
Increase (decrease) in accounts payable and accrued expenses	23,162	(15,844)	(26,724)
Other, net	(14,579)	(3,631)	16,482
Net cash provided by operating activities	452,988	352,589	501,584
Fixed maturity securities available for sale in nature:
Purchases	(784,752)	(1,794,817)	(1,460,641)
Sales	276,805	856,291	336,201
Calls or maturities	294,309	480,023	518,557
Equity securities available for sale in nature:
Purchases	(1,356,493)	(1,042,913)	(958,008)
Sales	1,356,132	1,154,523	943,857
Changes in securities payable and receivable	(36,435)	22,124	8,327
(Increase) decrease in short-term investments	(48,446)	38,141	270,383
Purchases of fixed assets	(36,810)	(35,508)	(41,442)
Sales of fixed assets	29,876	3	27
Other, net	10,377	5,749	9,069
Net cash used in investing activities	(295,437)	(316,384)	(373,670)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid to shareholders	(70,322)	(105,482)	(140,226)
Proceeds from stock options exercised	0	0	215
Payments on finance lease obligations	(1,102)	(1,504)	(825)
Proceeds from bank loan	175,000	25,000	0
Net cash provided by (used in) financing activities	103,576	(81,986)	(140,836)
Net increase (decrease) in cash	261,127	(45,781)	(12,922)
Cash:
Beginning of year	289,776	335,557	348,479
End of year	550,903	289,776	335,557
SUPPLEMENTAL CASH FLOW DISCLOSURE
Interest paid	23,000	16,665	16,616
Income taxes paid (refunded), net	$ (57,853)	$ (26,542)	$ 69,467

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2023
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies General Mercury General Corporation ("Mercury General") and its subsidiaries (referred to herein collectively as the "Company") are primarily engaged in writing personal automobile insurance through 12 Insurance Companies in 11 states, principally California. The Company also writes homeowners, commercial automobile, commercial property, mechanical protection, fire, and umbrella insurance. The private passenger automobile line of insurance business was more than 62% of the Company’s direct premiums written in 2023, 2022, and 2021, and approximately 82%, 82%, and 87% of the private passenger automobile premiums were written in California in 2023, 2022, and 2021, respectively. Premiums written represents the premiums charged on policies issued during a fiscal period, which is a statutory measure designed to determine production levels. Consolidation and Basis of Presentation The consolidated financial statements include the accounts of Mercury General Corporation and its subsidiaries: Insurance Companies Mercury Casualty Company ("MCC") American Mercury Insurance Company Mercury Insurance Company ("MIC") American Mercury Lloyds Insurance Company (1) California Automobile Insurance Company ("CAIC") Mercury County Mutual Insurance Company (2) California General Underwriters Insurance Company, Inc. Mercury Indemnity Company of America Mercury Insurance Company of Illinois Orion Indemnity Company Mercury Insurance Company of Georgia Mercury Indemnity Company of Georgia Non-Insurance Companies Mercury Select Management Company, Inc. AIS Management LLC Mercury Insurance Services LLC Auto Insurance Specialists LLC Animas Funding LLC ("AFL") (3) PoliSeek AIS Insurance Solutions, Inc. Fannette Funding LLC ("FFL") (3) Mercury Plus Insurance Services LLC Mercury Information Technology Services LLC (4) Mercury (Shanghai) Information Technology Services Co., Ltd. ("Mercury Shanghai") (5) __________ (1) American Mercury Lloyds Insurance Company is not owned but is controlled by the Company through its attorney-in-fact, Mercury Select Management Company, Inc. (2) Mercury County Mutual Insurance Company is not owned but is controlled by the Company through a management contract. (3) Special purpose investment vehicle. (4) Parent company of Mercury Shanghai. (5) Mercury Shanghai provides software development and related technical services to the Company's subsidiaries. The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP"), which differ in some respects from those filed in reports to insurance regulatory authorities. All intercompany transactions and balances have been eliminated. Certain prior period amounts have been reclassified to conform with the current period presentation. The Company did not have other comprehensive income (loss) in 2023, 2022 and 2021. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. These estimates require the Company to apply complex assumptions and judgments, and often the Company must make estimates about effects of matters that are inherently uncertain and will likely change in subsequent periods. The most significant assumptions in the preparation of these consolidated financial statements relate to reserves for losses and loss adjustment expenses. Actual results could differ from those estimates. Investments and Other Financial Instruments Financial instruments recorded in the consolidated balance sheets include investments, note receivable, other receivables, accounts payable, options sold, and notes payable. The Company’s investments include securities issued by the U.S. government and its agencies, securities issued by states and municipal governments and agencies, certain corporate and other debt securities, equity securities, and exchange traded funds. The Company applies the fair value option to all fixed maturity and equity securities and short-term investments at the time an eligible item is first recognized. The primary reasons for electing the fair value option were simplification and cost benefit considerations as well as the expansion of the use of fair value measurement by the Company consistent with the long-term measurement objectives of the Financial Accounting Standards Board (the "FASB") for accounting for financial instruments. Gains and losses due to changes in fair value for items measured at fair value pursuant to application of the fair value option are included in net realized investment gains in the Company's consolidated statements of operations, while interest and dividend income on investment holdings are recognized on an accrual basis on each measurement date and are included in net investment income in the Company's consolidated statements of operations. The Company’s fixed maturity and equity securities are classified as “trading” and carried at fair value as required when applying the fair value option. The majority of equity holdings, including non-redeemable preferred stocks, are actively traded on national exchanges or trading markets, and are valued at the last transaction price on the balance sheet date. The fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Due to their short-term maturity, the carrying values of other receivables and accounts payable approximate their fair values. 98.4% of the fair value of its investments at December 31, 2023 is based on observable market prices, observable pricing parameters, or is derived from such prices or parameters. The availability of observable market prices and pricing parameters can vary by financial instrument. Observable market prices and pricing parameters of a financial instrument, or a related financial instrument, are used to derive a price without requiring significant judgment. The Company may hold or acquire financial instruments that lack observable market prices or pricing parameters because they are less actively traded currently or in future periods. The fair value of such instruments is determined using techniques appropriate for each particular financial instrument. These techniques may involve some degree of judgment. The price transparency of the particular financial instrument will determine the degree of judgment involved in determining the fair value of the Company’s financial instruments. Price transparency is affected by a wide variety of factors, including the type of financial instrument, whether it is a new financial instrument and not yet established in the marketplace, and the characteristics particular to the transaction. Financial instruments for which actively quoted prices or pricing parameters are available or for which fair value is derived from actively quoted prices or pricing parameters will generally have a higher degree of price transparency. By contrast, financial instruments that are thinly traded or not quoted will generally have diminished price transparency. Even in normally active markets, the price transparency for actively quoted financial instruments may be reduced during periods of market dislocation. Alternatively, in thinly quoted markets, the participation of market makers willing to purchase and sell a financial instrument provides a source of transparency for products that otherwise are not actively quoted. For a further discussion, see Note 4. Fair Value Measurements. Fixed maturity securities include debt securities, which may have fixed or variable principal payment schedules, may be held for indefinite periods of time, and may be used as a part of the Company’s asset/liability strategy or sold in response to changes in interest rates, anticipated prepayments, risk/reward characteristics, liquidity needs, tax planning considerations, or other economic factors. Premiums and discounts on fixed maturities are amortized using first call date and are adjusted for anticipated prepayments. Premiums and discounts on mortgage-backed securities are adjusted for anticipated prepayment using the retrospective method, with the exception of some beneficial interests in securitized financial assets, which are accounted for using the prospective method. Equity securities consist of non-redeemable preferred stocks, common stocks on which dividend income is partially tax-sheltered by the 50% corporate dividend received deduction, and private equity funds. Short-term investments include money market accounts, options, and short-term bonds that are highly rated short duration securities and redeemable within one year. In the normal course of investing activities, the Company either forms or enters into relationships with variable interest entities ("VIEs"). A VIE is an entity that either has investors that lack certain essential characteristics of a controlling financial interest, such as simple majority kick-out rights, or lacks sufficient funds to finance its own activities without financial support provided by other entities. The Company performs ongoing qualitative assessments of the VIEs to determine whether the Company has a controlling financial interest in the VIE and therefore is the primary beneficiary. The Company is deemed to have a controlling financial interest when it has both the ability to direct the activities that most significantly impact the economic performance of the VIE and the obligation to absorb losses or right to receive benefits from the VIE that could potentially be significant to the VIE. Based on the Company's assessment, if it determines it is the primary beneficiary, the Company consolidates the VIE in its consolidated financial statements. From time to time, the Company forms special purpose investment vehicles to facilitate its investment activities involving derivative instruments such as total return swaps, or limited partnerships such as private equity funds. These special purpose investment vehicles are consolidated VIEs as the Company has determined it is the primary beneficiary of such VIEs. Creditors have no recourse against the Company in the event of default by these VIEs. The Company had no implied or unfunded commitments to these VIEs at December 31, 2023 and 2022. The Company's financial or other support provided to these VIEs and its loss exposure are limited to its collateral and original investment. The Company invests, directly or indirectly through its consolidated VIEs, in limited partnerships or limited liability companies such as private equity funds. These investments are non-consolidated VIEs as the Company has determined it is not the primary beneficiary of such VIEs. The Company's maximum exposure to loss with respect to these VIEs is limited to the total carrying value that is included in equity securities in the Company's consolidated balance sheets. At December 31, 2023 and 2022, the Company had approximately $8 million and $9 million, respectively, in unfunded commitments to these VIEs. Securities on Deposit As required by statute, the Company’s insurance subsidiaries have securities deposited with the departments of insurance or similar governmental agencies in the states in which they are licensed to operate ("DOI") with fair values totaling approximately $15 million and $14 million at December 31, 2023 and 2022, respectively. Deferred Policy Acquisition Costs Deferred policy acquisition costs consist of commissions paid to outside agents, premium taxes, salaries, and certain other underwriting costs that are incremental or directly related to the successful acquisition of new and renewal insurance contracts and are amortized over the life of the related policy in proportion to premiums earned. Deferred policy acquisition costs are limited to the amount that will remain after deducting from unearned premiums and anticipated investment income, the estimated losses and loss adjustment expenses, and the servicing costs that will be incurred as premiums are earned. The Company’s deferred policy acquisition costs are further limited by excluding those costs not directly related to the successful acquisition of insurance contracts. The Company does not defer advertising expenditures but expenses them as incurred. The table below presents a summary of deferred policy acquisition cost amortization and net advertising expense: Year Ended December 31, 2023 2022 2021 (Amounts in millions) Deferred policy acquisition cost amortization $ 708.5 $ 654.6 $ 633.4 Net advertising expense 8.9 11.8 50.1 Fixed Assets Fixed assets are stated at historical cost less accumulated depreciation and amortization. A fixed asset classified as held for sale is measured at the lower of its carrying amount or fair value less cost to sell, and is presented separately from other fixed assets. The useful life for buildings is 40 years. Furniture, equipment, and purchased software are depreciated on a combination of straight-line and accelerated methods over 3 to 7 years. The Company has capitalized certain consulting costs, payroll, and payroll-related costs for employees related to computer software developed for internal use, which are amortized on a straight-line method over the estimated useful life of the software, generally not exceeding 7 years. In accordance with applicable accounting standards, capitalization ceases no later than the point at which a computer software project is substantially complete and ready for its intended use. Leasehold improvements are amortized over the shorter of the useful life of the assets or the life of the associated lease. The Company periodically assesses long-lived assets or asset groups including building and equipment, for recoverability when events or changes in circumstances indicate that their carrying amounts may not be recoverable. If the Company identifies an indicator of impairment, the Company assesses recoverability by comparing the carrying amount of the asset to the sum of the undiscounted cash flows expected to result from the use and the eventual disposal of the asset. An impairment loss is recognized when the carrying amount is not recoverable and is measured as the excess of carrying value over fair value. There were no impairment charges during 2023, 2022, and 2021. Goodwill and Other Intangible Assets Goodwill and other intangible assets arise as a result of business acquisitions and consist of the excess of the cost of the acquisitions over the tangible and intangible assets acquired and liabilities assumed and identifiable intangible assets acquired. Identifiable intangible assets consist of the value of customer relationships, trade names, software and technology, and favorable leases, which are all subject to amortization, and an insurance license which is not subject to amortization. The Company evaluates goodwill and other intangible assets for impairment annually or whenever events or changes in circumstances indicate that it is more likely than not that the carrying amount of goodwill and other intangible assets may exceed their implied fair values. The Company qualitatively determines whether, more likely than not, the fair value exceeds the carrying amount of a reporting unit. There are numerous assumptions and estimates underlying the qualitative assessments including future earnings, long-term strategies, and the Company’s annual planning and forecasting process. If these planned initiatives do not accomplish the targeted objectives, the assumptions and estimates underlying the qualitative assessments could be adversely affected and have a material effect upon the Company’s financial condition and results of operations. In addition, the Company evaluates other intangible assets using methods similar to those used for goodwill described above. As of December 31, 2023 and 2022, goodwill and other intangible impairment assessments indicated that there was no impairment. Premium Revenue Recognition Premium revenue is recognized on a pro-rata basis over the terms of the policies in proportion to the amount of insurance protection provided. Premium revenue includes installment and other fees for services which are recognized in the periods in which the services are rendered. Unearned premiums represent the portion of the written premium related to the unexpired policy term. Unearned premiums are predominantly computed monthly on a pro-rata basis and are stated gross of reinsurance deductions, with the reinsurance deduction recorded in other assets. The Company evaluates its unearned premiums periodically for premium deficiencies by comparing the sum of expected claim costs, unamortized acquisition costs and maintenance costs, partially offset by investment income, to related unearned premiums. To the extent that any of the Company’s lines of insurance business become unprofitable, a premium deficiency reserve may be required. Net premiums written, a statutory measure designed to determine production levels, was $4.46 billion, $3.98 billion, and $3.86 billion in 2023, 2022, and 2021, respectively. Losses and Loss Adjustment Expenses Unpaid losses and loss adjustment expenses are determined in amounts estimated to cover incurred losses and loss adjustment expenses and established based upon the Company’s assessment of claims pending and the development of prior years’ loss liabilities. These amounts include liabilities based upon individual case estimates for reported losses and loss adjustment expenses and estimates of such amounts that are incurred but not reported. Changes in the estimated liability are charged or credited to operations as the losses and loss adjustment expenses are re-estimated. The liability is stated net of anticipated salvage and subrogation recoveries, and gross of reinsurance recoverables on unpaid losses. Estimating loss reserves is a difficult process as many factors can ultimately affect the final settlement of a claim and, therefore, the loss reserve that is required. A key assumption in estimating loss reserves is the degree to which the historical data used to analyze reserves will be predictive of ultimate claim costs on incurred claims. Changes in the regulatory and legal environments, results of litigation, medical costs, the cost of repair materials, and labor rates, among other factors, can impact this assumption. In addition, time can be a critical part of reserving determinations since the longer the span between the incidence of a loss and the payment or settlement of a claim, the more variable the ultimate settlement amount could be. Accordingly, short-tail claims, such as property damage claims, tend to be more reasonably predictable than long-tail liability claims, such as those involving the Company’s bodily injury ("BI") coverages. Management believes that the liability for losses and loss adjustment expenses is adequate to cover the ultimate net cost of losses and loss adjustment expenses incurred to date. However, since the provisions for loss reserves are necessarily based upon estimates, the ultimate liability may be more or less than such provisions. The Company analyzes loss reserves quarterly primarily using the incurred loss, paid loss, average severity coupled with the claim count development methods, and the generalized linear model ("GLM") described below. When deciding among methods to use, the Company evaluates the credibility of each method based on the maturity of the data available and the claims settlement practices for each particular line of insurance business or coverage within a line of insurance business. The Company may also evaluate qualitative factors such as known changes in laws or legal ruling that could affect claims handling or other external environmental factors or internal factors that could affect the settlement of claims. When establishing the loss reserve, the Company will generally analyze the results from all of the methods used rather than relying on a single method. While these methods are designed to determine the ultimate losses on claims under the Company’s policies, there is inherent uncertainty in all actuarial models since they use historical data to project outcomes. The Company believes that the techniques it uses provide a reasonable basis in estimating loss reserves. • The incurred loss method analyzes historical incurred case loss (case reserves plus paid losses) development to estimate ultimate losses. The Company applies development factors against current case incurred losses by accident period to calculate ultimate expected losses. The Company believes that the incurred loss method provides a reasonable basis for evaluating ultimate losses, particularly in the Company’s larger, more established lines of insurance business which have a long operating history. • The paid loss method analyzes historical payment patterns to estimate the amount of losses yet to be paid. • The average severity method analyzes historical loss payments and/or incurred losses divided by closed claims and/or total claims to calculate an estimated average cost per claim. From this, the expected ultimate average cost per claim can be estimated. The average severity method coupled with the claim count development method provides meaningful information regarding inflation and frequency trends that the Company believes is useful in establishing loss reserves. The claim count development method analyzes historical claim count development to estimate future incurred claim count development for current claims. The Company applies these development factors against current claim counts by accident period to calculate ultimate expected claim counts. • The GLM determines an average severity for each percentile of claims that have been closed as a percentage of estimated ultimate claims. The average severities are applied to open claims to estimate the amount of losses yet to be paid. The GLM utilizes operational time, determined as a percentile of claims closed rather than a finite calendar period, which neutralizes the effect of changes in the timing of claims handling. The Company analyzes catastrophe losses separately from non-catastrophe losses. For catastrophe losses, the Company generally determines claim counts based on claims reported and development expectations from previous catastrophes and applies an average expected loss per claim based on loss reserves established by adjusters and average losses on previous similar catastrophes. For catastrophe losses on individual properties that are expected to be total losses, the Company typically establishes reserves at the policy limits. Derivative Financial Instruments The Company accounts for all derivative instruments, other than those that meet the normal purchases and sales exception, as either an asset or liability, measured at fair value, which is based on information obtained from independent parties. In addition, changes in fair value are recognized in earnings unless specific hedge accounting criteria are met. See Note 9. Derivative Financial Instruments. Earnings (Loss) Per Share Basic earnings (loss) per share excludes dilution and reflects net income (loss) divided by the weighted average shares of common stock outstanding during the periods presented. Diluted earnings (loss) per share is based on the weighted average shares of common stock and potential dilutive securities outstanding during the periods presented. At December 31, 2023, potentially dilutive securities consisted of outstanding stock options. See Note 17. Earnings (Loss) Per Share , for the required disclosures relating to the calculation of basic and diluted earnings (loss) per share. Income Taxes Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial reporting basis and the respective tax basis of the Company’s assets and liabilities, and expected benefits of utilizing net operating loss, capital loss, and tax-credit carryforwards. The Company assesses the likelihood that its deferred tax assets will be realized and, to the extent management does not believe these assets are more likely than not to be realized, a valuation allowance is established. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates or laws is recognized in earnings in the period that includes the enactment date. The Company’s deferred income taxes usually include a combination of ordinary and capital deferred tax benefits and expenses. At December 31, 2023, the Company’s deferred income taxes were in a net asset position mainly due to deferred tax assets generated by unearned premiums and loss reserve discounting. These deferred tax assets were substantially offset by deferred tax liabilities resulting from deferred policy acquisition costs. In assessing the Company's ability to realize deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized, and to the extent management does not believe these assets are more likely than not to be realized, a valuation allowance is established. The ultimate realization of deferred tax assets is dependent upon generating sufficient taxable income of the appropriate character within the carryback and carryforward periods available under the tax law. Management considers the reversal of deferred tax liabilities, projected future taxable income of an appropriate nature, and tax-planning strategies in making this assessment. Management’s recoverability assessment of the Company’s deferred tax assets which are ordinary in character takes into consideration the Company’s strong history of generating ordinary taxable income and a reasonable expectation that it will continue to generate ordinary taxable income in the future. The Company also has various deferred tax liabilities that represent sources of future ordinary taxable income. Management’s recoverability assessment with regard to its capital deferred tax assets is based on estimates of anticipated capital gains, tax-planning strategies available to generate future taxable capital gains, and the Company's capacity to absorb capital losses carried back to prior years, each of which would contribute to the realization of deferred tax benefits. The Company has significant unrealized gains in its investment portfolio that could be realized through asset dispositions, at management’s discretion. In addition, the Company expects to hold certain debt securities, which are currently in loss positions, to recovery or maturity. Management believes unrealized losses related to these debt securities, which represent a portion of the unrealized loss positions at December 31, 2023, are fully realizable at maturity. Management believes its long-term time horizon for holding these securities allows it to avoid any forced sales prior to maturity. Further, the Company has the capability to generate additional realized capital gains by entering into sale-leaseback transactions using one or more of its appreciated real estate holdings. The realized gains on the real estate holdings could be used to realize both ordinary and capital deferred tax assets. The Company also has the capacity to recoup capital deferred tax assets through tax capital loss carryback claims for taxes paid within permitted carryback periods. The Company has the capability to implement tax planning strategies and it has a steady history of generating positive cash flows from operations and believes that its liquidity needs can be met in future periods without the forced sale of its investments. This capability assists management in controlling the timing and amount of realized losses generated during future periods. By prudent utilization of some or all of these strategies, management has the intent and believes that it has the ability to generate capital gains and minimize tax losses in a manner sufficient to avoid losing the benefits of its deferred tax assets. Management will continue to assess the need for a valuation allowance on a quarterly basis. Although realization is not assured, management believes it is more likely than not that the Company’s deferred tax assets will be realized. Contingent Liabilities The Company has known, and may have unknown, potential liabilities which include claims, assessments, lawsuits, or regulatory fines and penalties relating to the Company’s business. The Company continually evaluates these potential liabilities and accrues for them and/or discloses them in the notes to the consolidated financial statements where required. In addition, the Company accrues for anticipated legal defense costs associated with lawsuits, claims or regulatory actions. The Company does not believe that the ultimate resolution of currently pending legal or regulatory proceedings, either individually or in the aggregate, will have a material adverse effect on its financial condition or cash flows. See Note 18. Commitments and Contingencies, for the required disclosures relating to contingent liabilities. Reinsurance Liabilities for unearned premiums and unpaid losses are stated in the accompanying consolidated financial statements before deductions for ceded reinsurance. Unpaid losses and unearned premiums that are ceded to reinsurers are carried in reinsurance recoverables and other assets, respectively, in the Company's consolidated balance sheets. Reinsurance recoverables on unpaid losses are estimated based upon assumptions consistent with those used in establishing the liabilities related to the underlying contracts. Most of the Company's reinsurance premiums are recognized ratably over the contract period to the extent coverage remains available. Net premiums earned and losses and loss adjustment expenses are stated net of deductions for ceded reinsurance. The Company is the assuming reinsurer under a Catastrophe Portfolio Participation Reinsurance Contract ("Contract") effective through December 31, 2025. The Company reimburses up to $30 million in losses for a proportional share of a portfolio of catastrophe losses under the Contract, to the extent the actual loss ratio exceeds the threshold loss ratio of 73.5%. The Company is party to a Catastrophe Reinsurance Treaty ("Treaty") covering a wide range of perils that is effective through June 30, 2024. The Treaty provides $1,111 million of coverage on a per occurrence basis after covered catastrophe losses exceed the $100 million Company retention limit. The Treaty specifically excludes coverage for any Florida business and for California earthquake losses on fixed property policies, such as homeowners, but does cover losses from fires following an earthquake. The Treaty provides for one full reinstatement of coverage limits with a minor exception at certain upper layers of coverage, and includes some additional minor territorial and coverage restrictions. The effect of reinsurance on property and casualty premiums written and earned was as follows: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Premiums Written Direct $ 4,531,942 $ 4,018,057 $ 3,877,476 Ceded (109,644) (81,256) (65,521) Assumed 15,353 10,743 13,361 Net $ 4,437,651 $ 3,947,544 $ 3,825,316 Premiums Earned Direct $ 4,339,333 $ 3,993,771 $ 3,764,626 Ceded (109,445) (80,950) (65,017) Assumed 15,481 10,821 13,301 Net $ 4,245,369 $ 3,923,642 $ 3,712,910 The Company recognized ceded premiums earned of approximately $109 million, $81 million, and $65 million in 2023, 2022, and 2021, respectively, which are included in net premiums earned in its consolidated statements of operations, and ceded losses and loss adjustment expenses of approximately $10 million, $(13) million, and $(10) million in 2023, 2022, and 2021, respectively, which are included in losses and loss adjustment expenses in its consolidated statements of operations. The negative ceded losses and loss adjustment expenses in each of 2022 and 2021 was primarily the result of favorable development on prior years' catastrophe losses that had previously been ceded to the Company's reinsurers. The Insurance Companies, as primary insurers, a

Financial Instruments

Financial Instruments	12 Months Ended
Financial Instruments	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Financial Instruments	Financial Instruments Financial instruments recorded in the consolidated balance sheets include investments, other receivables, options sold, accounts payable, and notes payable. Due to their short-term maturity, the carrying values of other receivables and accounts payable approximate their fair values. All investments are carried at fair value in the consolidated balance sheets. The following table presents the fair values of financial instruments: December 31, 2023 2022 (Amounts in thousands) Assets Investments $ 5,228,520 $ 4,910,800 Note receivable 9,974 — Liabilities Options sold 1,955 162 Notes payable 557,710 375,631 Investments The Company applies the fair value option to all fixed maturity and equity securities and short-term investments at the time an eligible item is first recognized. The cost of investments sold is determined on a first-in and first-out method, and realized and unrealized gains and losses are included in net realized investment gains in the Company's consolidated statements of operations. See Note 3. Investments for additional information. Options Sold The Company writes covered call options through listed and over-the-counter exchanges. When the Company writes an option, an amount equal to the premium received by the Company is recorded as a liability and is subsequently adjusted to the current fair value of the option written. Premiums received from writing options that expire unexercised are treated by the Company as realized gains from investments on the expiration date. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Company has realized a gain or loss. The Company, as writer of an option, bears the market risk of an unfavorable change in the price of the security underlying the written option. Liabilities for covered call options are included in other liabilities in the Company's consolidated balance sheets. Notes payable The fair values of the Company’s publicly traded $375 million unsecured notes at December 31, 2023 and 2022 and its $200 million and $25 million drawn under the unsecured credit facility at December 31, 2023 and 2022 were obtained from third party pricing services. For additional disclosures regarding methods and assumptions used in estimating fair values, see Note 4. Fair Value Measurements.

Investments

Investments	12 Months Ended
Investments	Dec. 31, 2023
Investments [Abstract]
Investment	Investments The following table presents gains (losses) due to changes in fair value of investments that are measured at fair value pursuant to application of the fair value option: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Fixed maturity securities $ 62,833 $ (260,223) $ (39,649) Equity securities 45,046 (185,694) 107,701 Short-term investments 107 88 (141) Total gains (losses) $ 107,986 $ (445,829) $ 67,911 The following table presents gross gains (losses) realized on the sales of investments: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Gross Gross Net Gross Gross Net Gross Gross Net Fixed maturity securities $ 1,783 $ (3,246) $ (1,463) $ 863 $ (71,425) $ (70,562) $ 2,306 $ (6,690) $ (4,384) Equity securities 76,844 (91,109) (14,265) 86,168 (61,252) 24,916 64,061 (18,826) 45,235 Short-term investments — (4) (4) 8 (2,500) (2,492) 236 (381) (145) Contractual Maturity At December 31, 2023, fixed maturity holdings rated below investment grade and non-rated comprised 0.4% of total investments at fair value. Additionally, the Company owns securities that are credit enhanced by financial guarantors that are subject to uncertainty related to market perception of the guarantors’ ability to perform. Determining the estimated fair value of municipal bonds could become more difficult should markets for these securities become illiquid. The following table presents the estimated fair values of the Company's fixed maturity securities at December 31, 2023 by contractual maturity. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Estimated Fair Value (Amounts in thousands) Fixed maturity securities: Due in one year or less $ 306,970 Due after one year through five years 935,982 Due after five years through ten years 888,429 Due after ten years 2,187,955 Total $ 4,319,336 Investment Income The following table presents a summary of net investment income: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Fixed maturity securities $ 173,167 $ 127,336 $ 100,001 Equity securities 44,223 43,495 35,064 Cash and Short-term investments 23,741 3,495 1,059 Total investment income $ 241,131 $ 174,326 $ 136,124 Less: investment expense (6,501) (5,970) (6,397) Net investment income $ 234,630 $ 168,356 $ 129,727

Fair Value Measurement

Fair Value Measurement	12 Months Ended
Fair Value Measurement	Dec. 31, 2023
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Fair Value Measurement	Fair Value Measurements The Company employs a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The fair value of a financial instrument is the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date using the exit price. Accordingly, when market observable data are not readily available, the Company’s own assumptions are set to reflect those that market participants would be presumed to use in pricing the asset or liability at the measurement date. Assets and liabilities recorded at fair value on the consolidated balance sheets are categorized based on the level of judgment associated with inputs used to measure their fair value and the level of market price observability, as follows: Level 1 Unadjusted quoted prices are available in active markets for identical assets or liabilities as of the reporting date. Level 2 Pricing inputs are other than quoted prices in active markets, which are based on the following: a. Quoted prices for similar assets or liabilities in active markets; b. Quoted prices for identical or similar assets or liabilities in non-active markets; or c. Either directly or indirectly observable inputs as of the reporting date. Level 3 Pricing inputs are unobservable and significant to the overall fair value measurement, and the determination of fair value requires significant management judgment or estimation. In certain cases, inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. Thus, a Level 3 fair value measurement may include inputs that are observable (Level 1 or Level 2) and unobservable (Level 3). The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and consideration of factors specific to the asset or liability. The Company uses prices and inputs that are current as of the measurement date, including during periods of market disruption. In periods of market disruption, the ability to observe prices and inputs may be reduced for many instruments. This condition could cause an instrument to be reclassified from Level 1 to Level 2, or from Level 2 to Level 3. The Company recognizes transfers between levels at either the actual date of the event or a change in circumstances that caused the transfer. Summary of Significant Valuation Techniques for Financial Assets and Financial Liabilities The Company’s fair value measurements are based on the market approach, which utilizes market transaction data for the same or similar instruments. The Company obtained unadjusted fair values on 98.4% of its investment portfolio from an independent pricing service at December 31, 2023. Level 1 measurements —Fair values of financial assets and financial liabilities are obtained from an independent pricing service, and are based on unadjusted quoted prices for identical assets or liabilities in active markets. Additional pricing services and closing exchange values are used as a comparison to ensure that reasonable fair values are used in pricing the investment portfolio. U.S. government bonds/Short-term bonds : Valued using unadjusted quoted market prices for identical assets in active markets. Common stock : Comprised of actively traded, exchange listed U.S. and international equity securities and valued based on unadjusted quoted prices for identical assets in active markets. Money market instruments : Valued based on unadjusted quoted prices for identical assets in active markets. Options sold : Comprised of free-standing exchange listed derivatives that are actively traded and valued based on quoted prices for identical instruments in active markets. Level 2 measurements —Fair values of financial assets and financial liabilities are obtained from an independent pricing service or outside brokers, and are based on prices for similar assets or liabilities in active markets or valuation models whose inputs are observable, directly or indirectly, for substantially the full term of the asset or liability. Additional pricing services are used as a comparison to ensure reliable fair values are used in pricing the investment portfolio. Municipal securities : Valued based on models or matrices using inputs such as quoted prices for identical or similar assets in active markets. Mortgage-backed securities : Comprised of securities that are collateralized by residential and commercial mortgage loans and valued based on models or matrices using multiple observable inputs, such as benchmark yields, reported trades and broker/dealer quotes, for identical or similar assets in active markets. The Company had holdings of $33.0 million and $27.3 million in commercial mortgage-backed securities at December 31, 2023 and 2022, respectively. Corporate securities/Short-term bonds : Valued based on a multi-dimensional model using multiple observable inputs, such as benchmark yields, reported trades, broker/dealer quotes and issue spreads, for identical or similar assets in active markets. Non-redeemable preferred stock : Valued based on observable inputs, such as underlying and common stock of same issuer and appropriate spread over a comparable U.S. Treasury security, for identical or similar assets in active markets. Collateralized loan obligations ("CLOs") : Valued based on underlying debt instruments and the appropriate benchmark spread for similar assets in active markets. Other asset-backed securities : Comprised of securities that are collateralized by non-mortgage assets, such as automobile loans, valued based on models or matrices using multiple observable inputs, such as benchmark yields, reported trades and broker/dealer quotes, for identical or similar assets in active markets. Level 3 measurements —Fair values of financial assets are based on inputs that are both unobservable and significant to the overall fair value measurement, including any items in which the evaluated prices obtained elsewhere were deemed to be of a distressed trading level. At December 31, 2023 and 2022, the Company did not have any financial assets or financial liabilities based on Level 3 measurements. Fair value measurement using NAV practical expedient - The fair values of the Company's investment in private equity funds measured at net asset value are determined using net asset value ("NAV") as advised by the external fund managers and the third party administrators. The NAV of the Company's limited partnership or limited liability company interest in such a fund is based on the manager's and the administrator's valuation of the underlying holdings in accordance with the fund's governing documents and GAAP. In accordance with applicable accounting guidance, private equity funds measured at fair value using the NAV practical expedient are not classified in the fair value hierarchy. At December 31, 2023, the Company had capital invested in three such funds: the strategy of two such funds with a combined fair value of approximately $79.2 million at December 31, 2023 is to provide current income to investors by investing mainly in secured loans, CLOs or CLO issuers, and equity interests in vehicles established to purchase and warehouse loans; and the strategy of the other such fund with a fair value of approximately $2.0 million at December 31, 2023 is to achieve long-term capital appreciation through privately-negotiated venture capital investments in seed- and early-stage portfolio companies with technology-enabled business models. The Company had approximately $8 million in unfunded commitments at December 31, 2023 with respect to the private equity funds measured at NAV. The underlying assets of the funds are expected to be liquidated over the period of approximately one year to nine years from December 31, 2023. In addition, the Company does not have the ability to redeem or withdraw from the funds, or to sell, assign, pledge or transfer its investment, without the consent from the General Partner or Managers of each fund, but will receive distributions based on the liquidation of the underlying assets and the interest proceeds from the underlying assets. The Company’s financial instruments at fair value are reflected in the consolidated balance sheets on a trade-date basis. Related unrealized gains or losses are recognized in net realized investment gains or losses in the consolidated statements of operations. Fair value measurements are not adjusted for transaction costs. The following tables present information about the Company’s assets and liabilities measured at fair value on a recurring basis, and indicate the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair values: December 31, 2023 Level 1 Level 2 Level 3 Total (Amounts in thousands) Assets Fixed maturity securities: U.S. government bonds and agencies $ 123,182 $ 51,268 $ — $ 174,450 Municipal securities — 2,777,258 — 2,777,258 Mortgage-backed securities — 186,887 — 186,887 Corporate securities — 599,630 — 599,630 Collateralized loan obligations — 484,947 — 484,947 Other asset-backed securities — 96,164 — 96,164 Total fixed maturity securities 123,182 4,196,154 — 4,319,336 Equity securities: Common stock 597,888 — — 597,888 Non-redeemable preferred stock — 51,563 — 51,563 Private equity funds measured at net asset value (1) 81,242 Total equity securities 597,888 51,563 — 730,693 Short-term investments: Short-term bonds 12,015 1,838 — 13,853 Money market instruments 164,595 — — 164,595 Other 43 — — 43 Total short-term investments 176,653 1,838 — 178,491 Other assets: Note receivable — 9,974 — 9,974 Total assets at fair value $ 897,723 $ 4,259,529 $ — $ 5,238,494 Liabilities Other liabilities: Options sold 1,955 — — 1,955 Total liabilities at fair value $ 1,955 $ — $ — $ 1,955 December 31, 2022 Level 1 Level 2 Level 3 Total (Amounts in thousands) Assets Fixed maturity securities: U.S. government bonds $ 103,519 $ 55,088 $ — $ 158,607 Municipal securities — 2,737,183 — 2,737,183 Mortgage-backed securities — 166,260 — 166,260 Corporate securities — 569,553 — 569,553 Collateralized debt obligations — 320,252 — 320,252 Other asset-backed securities — 136,456 — 136,456 Total fixed maturity securities 103,519 3,984,792 — 4,088,311 Equity securities: Common stock 558,169 — — 558,169 Non-redeemable preferred stock — 51,236 — 51,236 Private equity funds measured at net asset value (1) 90,147 Total equity securities 558,169 51,236 — 699,552 Short-term investments: Short-term bonds 51,638 8,238 — 59,876 Money market instruments 63,021 — — 63,021 Other 40 — — 40 Total short-term investments 114,699 8,238 — 122,937 Total assets at fair value $ 776,387 $ 4,044,266 $ — $ 4,910,800 Liabilities Other liabilities: Options sold 162 — — 162 Total liabilities at fair value $ 162 $ — $ — $ 162 __________ (1) The fair value is measured using the NAV practical expedient; therefore, it is not categorized within the fair value hierarchy. The fair value amount is presented in this table to permit reconciliation of the fair value hierarchy to the amounts presented in the Company's consolidated balance sheets. There were no transfers between Levels 1, 2, and 3 of the fair value hierarchy in 2023 and 2022. At December 31, 2023 and 2022, there were no material assets or liabilities measured at fair value on a nonrecurring basis. Financial Instruments Disclosed, But Not Carried, at Fair Value The following tables present the carrying value and fair value of the Company’s financial instruments disclosed, but not carried, at fair value, and the level within the fair value hierarchy at which such instruments are categorized: December 31, 2023 Carrying Value Fair Value Level 1 Level 2 Level 3 (Amounts in thousands) Liabilities Notes payable: Unsecured notes $ 373,729 $ 357,765 $ — $ 357,765 $ — Unsecured credit facility 200,000 199,945 — 199,945 — Total $ 573,729 $ 557,710 $ — $ 557,710 $ — December 31, 2022 Carrying Value Fair Value Level 1 Level 2 Level 3 (Amounts in thousands) Liabilities Notes payable: Unsecured notes $ 373,330 $ 350,644 $ — $ 350,644 $ — Unsecured credit facility 25,000 24,987 — 24,987 — Total $ 398,330 $ 375,631 $ — $ 375,631 $ — Unsecured Notes The fair value of the Company’s publicly traded $375 million unsecured notes at December 31, 2023 and 2022 was based on the spreads above the risk-free yield curve. These spreads are generally obtained from the new issue market, secondary trading and broker-dealer quotes. See Note 8. Notes Payable for additional information on unsecured notes. Unsecured Credit Facility

Fixed Assets

Fixed Assets	12 Months Ended
Fixed Assets	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Fixed Assets	Fixed Assets The following table presents the components of fixed assets: December 31, 2023 2022 (Amounts in thousands) Land $ 9,713 $ 18,152 Buildings and improvements 65,408 105,526 Furniture and equipment 30,862 45,829 Capitalized software 344,654 314,092 Leasehold improvements 2,892 5,471 453,529 489,070 Less: accumulated depreciation and amortization (302,346) (317,628) Fixed assets, net $ 151,183 $ 171,442 Depreciation expense, including amortization of leasehold improvements, was $33.8 million, $34.3 million, and $32.5 million for 2023, 2022, and 2021, respectively. An office building located in Clearwater, Florida was initially classified as a property held for sale at December 31, 2022, and $20.2 million of the property held for sale, which represented the fair value of the property less the estimated costs to sell, was included in other assets in the Company's consolidated balance sheets on that date. The loss of $0.8 million recognized for the held-for-sale classification was included in other operating expenses in the Company's consolidated statements of operations for the year ended December 31, 2022. The Company completed the sale of this property on March 31, 2023 for a total sale price of $19.6 million, and recognized a loss of $1.8 million associated with the sale, which was included in other revenues in the Company's consolidated statements of operations for the year ended December 31, 2023. $9.8 million of the total sale price was received in the form of a promissory note (the "Note"). $8.5 million of the sale price, after settlement of selling expenses and outstanding amounts due on the property, was received in cash. Only the cash received on the sale of the property is included in the Company's consolidated statements of cash flows for the year ended December 31, 2023. The Note is secured by the property sold, and bears interest at an annual rate of 7.0% for the first two years, with an adjustment to the greater of 7.0% or the rate on a one-year U.S. Treasury Bill at the two-year anniversary for the remainder of the term. The term of the Note is four years and interest is paid in monthly installments. In connection with the sale of the property, the Company entered into a lease agreement whereby the Company leased 14,883 square feet of office space, or approximately 9% of the total space of the property sold, from the new owner of the property. The lease term is five years, commencing on April 1, 2023, and the average annual base rent is approximately $0.4 million. The Company completed the sale of an office building located in Rancho Cucamonga, California in May 2023 for a total sale price of $22.3 million, and recognized a gain of $7.9 million associated with the sale, which is included in other revenues in the Company's consolidated statements of operations for the year ended December 31, 2023. The Company received $21.4 million in cash, after settlement of selling expenses. In connection with the sale of the property, the Company entered into a lease agreement whereby the Company leased 6,000 square feet of office space, or approximately 5% of the total space of the property sold, from the new owner of the property. The lease term is two years, commencing on May 16, 2023, and the average annual base rent is approximately $0.2 million. This office building was initially classified as a property held for sale at March 31, 2023, and $13.6 million of the property held for sale, which represented the carrying amount of the property, was included in other assets in the Company's consolidated balance sheets until completion of the sale. In addition, an office building located in Brea, California was classified as a property held for sale at September 30, 2023, and $10.8 million of the property held for sale, which represented the carrying amount of the property, was included in other assets in the Company's consolidated balance sheets at December 31, 2023. The Company is actively engaged in selling this office building as most of its employees currently work from home and this property is being used on a limited basis.

Deferred Policy Acquisition Cos

Deferred Policy Acquisition Costs	12 Months Ended
Deferred Policy Acquisition Costs	Dec. 31, 2023
Deferred Policy Acquisition Costs Disclosures [Abstract]
Deferred Policy Acquisition Costs	Deferred Policy Acquisition Costs Deferred policy acquisition costs were as follows: December 31, 2023 2022 2021 (Amounts in thousands) Balance, beginning of year $ 266,475 $ 258,259 $ 246,994 Policy acquisition costs deferred 735,894 662,828 644,650 Amortization (708,525) (654,612) (633,385) Balance, end of year $ 293,844 $ 266,475 $ 258,259

Leases

Leases	12 Months Ended
Leases	Dec. 31, 2023
Leases [Abstract]
Leases	Leases The Company has operating leases for office space for insurance operations and administrative functions, automobiles for certain employees and general uses, and office equipment such as printers and computers. In addition, the Company has finance leases for electronic data processing ("EDP") equipment. As of December 31, 2023, the Company's leases had remaining terms ranging from less than one year to approximately six years. These leases may contain provisions for periodic adjustments to rates and charges applicable under such lease agreements. These rates and charges also may vary with the Company's level of use. Certain of these leases include one or more options to renew or early terminate, and the exercise of these options is at the Company's sole discretion. Certain leases also include options to purchase the leased property. The Company's lease agreements do not contain any residual value guarantees. The Company determines if an arrangement is a lease at inception. Right-of-use ("ROU") assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Lease assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. The Company uses its estimated incremental borrowing rate for leases for office space, office equipment and EDP equipment, which is derived from information available at the lease commencement date, in determining the present value of lease payments, as the rate implicit in the lease is not readily available for such leases. The Company gives consideration to its recent debt issuances as well as publicly available data for instruments with similar characteristics when calculating its incremental borrowing rates. For automobile leases, the Company uses the rate implicit in the lease at the lease commencement date in determining the present value of lease payments, as the readily-determinable implicit rate is provided in such leases. The Company's lease terms include options to extend or terminate the lease when it is reasonably certain that it will exercise that option. The Company does not use the short-term lease exemption practical expedient and records all leases on the balance sheets, including leases with a term of twelve months or less. The Company accounts for the lease and non-lease components as a single lease component for leases for office space, automobiles, and office equipment, while it accounts for the lease components separately from the non-lease components for EDP equipment leases. The components of lease cost along with its classification on the Company's consolidated statements of operations were as follows: Year Ended December 31, Lease Cost Classification 2023 2022 2021 (Amounts in thousands) Operating lease cost (1) Other operating expenses $ 11,674 $ 14,747 $ 15,846 Finance lease cost: Amortization of assets Other operating expenses 1,241 1,288 719 Interest on lease liabilities Interest expense 40 54 25 Variable lease cost (1) Other operating expenses 1,100 2,184 1,500 Sublease income (2) Other revenue (799) (492) (11) Net lease cost $ 13,256 $ 17,781 $ 18,079 __________ (1) Includes short-term leases, which are immaterial. (2) The Company subleased certain leased office space to third parties in 2023, 2022 and 2021. The components of lease assets and liabilities along with their classification on the Company's consolidated balance sheets were as follows: December 31, Lease Assets and Liabilities Classification 2023 2022 (Amounts in thousands) Operating lease assets Operating lease right-of-use assets $ 14,406 $ 20,183 Operating lease liabilities Operating lease liabilities 14,231 21,924 Finance lease assets Other assets 2,996 4,233 Finance lease liabilities Other liabilities 2,841 3,573 Weighted-average lease term and discount rate were as follows: December 31, 2023 2022 Weighted-average remaining lease term (in years): Operating leases 2.6 2.9 Finance leases 2.5 3.5 Weighted-average discount rate: Operating leases 4.37 % 2.84 % Finance leases 1.37 % 1.29 % Supplemental cash flow and other information related to leases was as follows: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 14,010 $ 15,815 $ 16,158 Operating cash flows from finance leases 41 54 25 Financing cash flows from finance leases 1,102 1,504 825 ROU assets obtained in exchange for lease liabilities: Operating leases 6,587 4,677 4,904 Finance leases — 1,951 1,115 Maturities of lease liabilities as of December 31, 2023 were as follows: Year Operating Leases Finance Leases (Amounts in thousands) 2024 $ 7,282 $ 1,449 2025 4,039 1,032 2026 2,351 405 2027 1,362 — 2028 243 — Total lease payments $ 15,277 $ 2,886 Less: Imputed interest 1,046 45 Total lease obligations $ 14,231 $ 2,841 As of December 31, 2023, the Company had additional lease commitments that have not yet commenced of approximately $3 million with each lease term of approximately four
Leases	Leases The Company has operating leases for office space for insurance operations and administrative functions, automobiles for certain employees and general uses, and office equipment such as printers and computers. In addition, the Company has finance leases for electronic data processing ("EDP") equipment. As of December 31, 2023, the Company's leases had remaining terms ranging from less than one year to approximately six years. These leases may contain provisions for periodic adjustments to rates and charges applicable under such lease agreements. These rates and charges also may vary with the Company's level of use. Certain of these leases include one or more options to renew or early terminate, and the exercise of these options is at the Company's sole discretion. Certain leases also include options to purchase the leased property. The Company's lease agreements do not contain any residual value guarantees. The Company determines if an arrangement is a lease at inception. Right-of-use ("ROU") assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Lease assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. The Company uses its estimated incremental borrowing rate for leases for office space, office equipment and EDP equipment, which is derived from information available at the lease commencement date, in determining the present value of lease payments, as the rate implicit in the lease is not readily available for such leases. The Company gives consideration to its recent debt issuances as well as publicly available data for instruments with similar characteristics when calculating its incremental borrowing rates. For automobile leases, the Company uses the rate implicit in the lease at the lease commencement date in determining the present value of lease payments, as the readily-determinable implicit rate is provided in such leases. The Company's lease terms include options to extend or terminate the lease when it is reasonably certain that it will exercise that option. The Company does not use the short-term lease exemption practical expedient and records all leases on the balance sheets, including leases with a term of twelve months or less. The Company accounts for the lease and non-lease components as a single lease component for leases for office space, automobiles, and office equipment, while it accounts for the lease components separately from the non-lease components for EDP equipment leases. The components of lease cost along with its classification on the Company's consolidated statements of operations were as follows: Year Ended December 31, Lease Cost Classification 2023 2022 2021 (Amounts in thousands) Operating lease cost (1) Other operating expenses $ 11,674 $ 14,747 $ 15,846 Finance lease cost: Amortization of assets Other operating expenses 1,241 1,288 719 Interest on lease liabilities Interest expense 40 54 25 Variable lease cost (1) Other operating expenses 1,100 2,184 1,500 Sublease income (2) Other revenue (799) (492) (11) Net lease cost $ 13,256 $ 17,781 $ 18,079 __________ (1) Includes short-term leases, which are immaterial. (2) The Company subleased certain leased office space to third parties in 2023, 2022 and 2021. The components of lease assets and liabilities along with their classification on the Company's consolidated balance sheets were as follows: December 31, Lease Assets and Liabilities Classification 2023 2022 (Amounts in thousands) Operating lease assets Operating lease right-of-use assets $ 14,406 $ 20,183 Operating lease liabilities Operating lease liabilities 14,231 21,924 Finance lease assets Other assets 2,996 4,233 Finance lease liabilities Other liabilities 2,841 3,573 Weighted-average lease term and discount rate were as follows: December 31, 2023 2022 Weighted-average remaining lease term (in years): Operating leases 2.6 2.9 Finance leases 2.5 3.5 Weighted-average discount rate: Operating leases 4.37 % 2.84 % Finance leases 1.37 % 1.29 % Supplemental cash flow and other information related to leases was as follows: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 14,010 $ 15,815 $ 16,158 Operating cash flows from finance leases 41 54 25 Financing cash flows from finance leases 1,102 1,504 825 ROU assets obtained in exchange for lease liabilities: Operating leases 6,587 4,677 4,904 Finance leases — 1,951 1,115 Maturities of lease liabilities as of December 31, 2023 were as follows: Year Operating Leases Finance Leases (Amounts in thousands) 2024 $ 7,282 $ 1,449 2025 4,039 1,032 2026 2,351 405 2027 1,362 — 2028 243 — Total lease payments $ 15,277 $ 2,886 Less: Imputed interest 1,046 45 Total lease obligations $ 14,231 $ 2,841 As of December 31, 2023, the Company had additional lease commitments that have not yet commenced of approximately $3 million with each lease term of approximately four

Notes Payable

Notes Payable	12 Months Ended
Notes Payable	Dec. 31, 2023
Notes Payable [Abstract]
Notes Payable	Notes Payable The following table presents information about the Company's notes payable: December 31, Lender Interest Rate Expiration 2023 2022 (Amounts in thousands) Senior unsecured notes (1) Publicly traded 4.40% March 15, 2027 $ 375,000 $ 375,000 Unsecured credit facility (2) Bank of America, Wells Fargo Bank, BMO Bank, and U.S. Bank Term SOFR plus 112.5-150.0 basis points November 16, 2026 200,000 25,000 Total principal amount 575,000 400,000 Less unamortized discount and debt issuance costs (3) 1,271 1,670 Total $ 573,729 $ 398,330 __________ (1) On March 8, 2017, the Company completed a public debt offering issuing $375 million of senior notes. The notes are unsecured senior obligations of the Company, with a 4.4% annual coupon payable on March 15 and September 15 of each year commencing September 15, 2017. These notes mature on March 15, 2027. The Company used the proceeds from the notes to pay off the total outstanding balance of $320 million under the existing loan and credit facility agreements and terminated the agreements on March 8, 2017. The remainder of the proceeds from the notes was used for general corporate purposes. The Company incurred debt issuance costs of approximately $3.4 million, inclusive of underwriters' fees. The notes were issued at a slight discount of 99.847% of par, resulting in the effective annualized interest rate, including debt issuance costs, of approximately 4.45%. (2) On March 31, 2021, the Company entered into an unsecured $75 million five-year revolving credit facility. On November 18, 2022, the Company entered into the First Amendment to this credit facility. The First Amendment extended the maturity date of the loan to November 16, 2026 from March 31, 2026 with possible further extension if certain conditions are met, increased the aggregate commitments by all the lenders to $200 million from $75 million, and replaced the LIBOR with the term SOFR. On November 30, 2023, the Company entered into the Second Amendment to this credit facility, which further increased the aggregate commitments by all the lenders to $250 million from $200 million. The interest rates on borrowings under the credit facility are based on the Company's debt to total capital ratio and range from Term SOFR plus 112.5 basis points when the ratio is under 20% to Term SOFR plus 150.0 basis points when the ratio is greater than or equal to 30%. Commitment fees for the undrawn portions of the credit facility range from 12.5 basis points when the ratio is under 20% to 22.5 basis points when the ratio is greater than or equal to 30%. The debt to total capital ratio is expressed as a percentage of (a) consolidated debt to (b) consolidated shareholders' equity plus consolidated debt. The Company's debt to total capital ratio was 27.1% at December 31, 2023, resulting in a 17.5 basis point commitment fee on any undrawn portion of the credit facility. As of February 13, 2024, a total of $200 million was drawn under this facility on a three-month revolving basis at an annual interest rate of approximately 6.84%, with $50 million available to be drawn. The Company contributed $150 million of the total amount drawn to the surplus of its consolidated insurance subsidiaries, and used the remainder for general corporate purposes. (3) The unamortized discount and debt issuance costs are associated with the publicly traded $375 million senior unsecured notes. These are amortized to interest expense over the life of the notes, and the unamortized balance is presented in the Company's consolidated balance sheets as a direct deduction from the carrying amount of the debt. The unamortized costs of approximately $0.8 million associated with entering into the $250 million unsecured revolving credit facility maturing on November 16, 2026 are included in other assets in the Company's consolidated balance sheets and amortized to interest expense over the term of the credit facility. The Company was in compliance with all of its financial covenants pertaining to minimum statutory surplus, debt to total capital ratio, and risk based capital ("RBC") ratio under the unsecured credit facility at December 31, 2023. Debt maturities for each of the next five years and thereafter as of December 31, 2023 are as follows: Maturity Amounts (in thousands) 2024 $ — 2025 — 2026 200,000 2027 375,000 2028 — Thereafter — Total $ 575,000

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
Derivative Financial Instruments	Dec. 31, 2023
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company is exposed to certain risks relating to its ongoing business operations. The primary risks managed by using derivative instruments are equity price risk and interest rate risk. Equity contracts (options sold) on various equity securities are intended to manage the price risk associated with forecasted purchases or sales of such securities. From time to time, the Company also enters into derivative contracts to enhance returns on its investment portfolio. The following tables present the location and amounts of derivative fair values in the consolidated balance sheets and derivative gains in the consolidated statements of operations: Liability Derivatives December 31, 2023 December 31, 2022 (Amounts in thousands) Options sold - Other liabilities $ 1,955 $ 162 Total derivatives $ 1,955 $ 162 Gains Recognized in Income Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Options sold - Net realized investment gains (losses) $ 8,586 $ 5,887 $ 3,045 Total $ 8,586 $ 5,887 $ 3,045 Most options sold consist of covered calls. The Company writes covered calls on underlying equity positions held as an enhanced income strategy that is permitted for the Company’s insurance subsidiaries under statutory regulations. The Company manages the risk associated with covered calls through strict capital limitations and asset diversification throughout various industries. For additional disclosures regarding equity contracts, see Note 4. Fair Value Measurements for additional disclosures regarding options sold.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
Goodwill and Other Intangible Assets	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill There were no changes in the carrying amount of goodwill during 2023 and 2022. No accumulated goodwill impairment losses existed at December 31, 2023 and 2022. Goodwill is reviewed annually for impairment and more frequently if potential impairment indicators exist. No impairment indicators were identified during 2023 and 2022. All of the Company's goodwill is associated with the Property and Casualty business segment (See Note 19. Segment Information for additional information on the reportable business segment). Other Intangible Assets The following table presents the components of other intangible assets: Gross Carrying Accumulated Net Carrying Useful Lives (Amounts in thousands) (in years) As of December 31, 2023 Customer relationships $ 54,862 $ (53,704) $ 1,158 11 Trade names 15,400 (9,625) 5,775 24 Technology 4,300 (4,300) — 10 Insurance license 1,400 — 1,400 Indefinite Total intangible assets, net $ 75,962 $ (67,629) $ 8,333 As of December 31, 2022 Customer relationships $ 54,862 $ (53,467) $ 1,395 11 Trade names 15,400 (8,983) 6,417 24 Technology 4,300 (4,300) — 10 Insurance license 1,400 — 1,400 Indefinite Total intangible assets, net $ 75,962 $ (66,750) $ 9,212 Other intangible assets are reviewed annually for impairment and more frequently if potential impairment indicators exist. No impairment indicators were identified during 2023 and 2022. Other intangible assets with definite useful lives are amortized on a straight-line basis over their useful lives. Other intangible assets amortization expense was $0.9 million, $1.0 million, and $1.1 million for the years ended December 31, 2023, 2022 and 2021, respectively. None of the intangible assets with definite useful lives are anticipated to have a residual value. The following table presents the estimated future amortization expense related to other intangible assets as of December 31, 2023: Year Ending December 31, Amortization Expense (Amounts in thousands) 2024 $ 851 2025 807 2026 807 2027 807 2028 807 Thereafter 2,854 Total $ 6,933

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2023
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income Taxes	Income Taxes Income tax provision The Company and its subsidiaries file a consolidated federal income tax return. The income tax expense (benefit) consisted of the following components: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Federal Current $ (3,840) $ (62,355) $ 37,391 Deferred 10,523 (93,562) 11,349 $ 6,683 $ (155,917) $ 48,740 State Current $ (2,958) $ 784 $ 1,542 Deferred (633) (2,910) 1,088 $ (3,591) $ (2,126) $ 2,630 Total Current $ (6,798) $ (61,571) $ 38,933 Deferred 9,890 (96,472) 12,437 Total $ 3,092 $ (158,043) $ 51,370 In computing taxable income, property and casualty insurers reduce underwriting income by losses and loss adjustment expenses incurred. The amount of the deduction for losses incurred associated with unpaid losses is discounted at the interest rates and for the loss payment patterns prescribed by the U.S. Treasury. The Inflation Reduction Act of 2022 introduced a new Corporate Alternative Minimum Tax (“CAMT”) on the adjusted financial statement income of applicable corporations. The provision is effective for tax years beginning after December 31, 2022, and was enacted on August 16, 2022. The Company has determined that averaged adjusted financial statement income is below the thresholds such that the Company does not expect to be liable for any CAMT. The following table presents a reconciliation of the tax expense based on the statutory rate to the Company's actual tax expense in the consolidated statements of operations: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Computed tax expense (benefit) at 21% $ 20,880 $ (140,850) $ 62,854 Tax-exempt interest income (13,640) (11,864) (11,577) Dividends received deduction (1,237) (1,364) (1,311) State tax (benefit) expense (3,539) (1,597) 2,134 Nondeductible expenses 639 279 843 Other, net (11) (2,647) (1,573) Income tax expense (benefit) $ 3,092 $ (158,043) $ 51,370 Deferred Income Taxes Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial reporting basis and the respective tax basis of the Company’s assets and liabilities, and expected benefits of utilizing net operating loss, capital loss, and tax-credit carryforwards. The ultimate realization of deferred tax assets is dependent upon generating sufficient taxable income of the appropriate character within the carryback and carryforward periods available under the tax law. Management considers the reversal of deferred tax liabilities, projected future taxable income of an appropriate nature, and tax-planning strategies in making this assessment. The Company believes that through the use of prudent tax planning strategies and the generation of capital gains, sufficient income will be realized in order to maximize the full benefits of its deferred tax assets. The following table presents the significant components of the Company’s net deferred tax assets and liabilities: December 31, 2023 2022 (Amounts in thousands) Deferred tax assets: 20% of net unearned premiums $ 75,394 $ 67,285 Discounting of loss reserves and salvage and subrogation recoverable for tax purposes 25,340 21,606 Expense accruals 11,262 11,578 Tax asset on net unrealized loss on securities carried at fair value 166 22,802 Other deferred tax assets 8,743 6,511 Total gross deferred tax assets 120,905 129,782 Deferred tax liabilities: Deferred policy acquisition costs (61,707) (55,960) Tax depreciation in excess of book depreciation (6,801) (11,029) Undistributed earnings of insurance subsidiaries (1,511) (1,898) Tax amortization in excess of book amortization (8,904) (7,466) Other deferred tax liabilities (8,969) (10,526) Total gross deferred tax liabilities (87,892) (86,879) Net deferred tax assets $ 33,013 $ 42,903 The Company had federal net operating loss carryforwards of approximately $19.7 million and $5.7 million at December 31, 2023 and 2022, respectively. $2.1 million of the total federal net operating loss carryforward at December 31, 2023 will begin to expire in 2028 and the remaining $17.6 million can be carried forward indefinitely for federal tax purposes. Uncertainty in Income Taxes The Company recognizes tax benefits related to positions taken, or expected to be taken, on its tax returns, only if the positions are "more-likely-than-not" sustainable. Once this threshold has been met, the Company’s measurement of its expected tax benefits is recognized in its financial statements. The total amount of unrecognized tax benefits related to tax uncertainties decreased by approximately $2.1 million during the 12 months ended December 31, 2023. The decrease was the result of a resolution related to a California Franchise Tax Board audit for tax years 2012 and 2013. The Company and its subsidiaries file income tax returns with the Internal Revenue Service and the taxing authorities of various states. Tax years that remain subject to examination by major taxing jurisdictions are 2020 through 2022 for federal taxes, and 2011 and 2020 through 2022 for California state taxes. The Company has certain unresolved tax assessment issues for tax year 2011 for California state taxes that are not material to its consolidated financial statements. Tax years 2012 through 2019 for California state taxes have been resolved with no outstanding issues. The following table presents a reconciliation of the beginning and ending balances of unrecognized tax benefits: December 31, 2023 2022 (Amounts in thousands) Balance at January 1 $ 4,380 $ 4,380 Additions (reductions) based on tax positions related to: Current year — — Prior years (2,118) — Balance at December 31 $ 2,262 $ 4,380 If unrecognized tax benefits were recognized, approximately $3.9 million and $6.6 million, including accrued interest, penalties and federal tax benefit related to unrecognized tax benefits, would impact the Company’s effective tax rate at December 31, 2023 and 2022, respectively. The Company recognizes interest and penalties related to unrecognized tax benefits as a part of income taxes. The Company recognized an accrued net (benefit) expense related to interest and penalties of approximately $(1.2) million, $0.4 million, and $0.3 million for the years ended December 31, 2023, 2022 and 2021, respectively. The Company carried an accrued interest and penalty balance of approximately $2.5 million and $3.7 million at December 31, 2023 and 2022, respectively.

Loss And Loss Adjustment Expens

Loss And Loss Adjustment Expense Reserves	12 Months Ended
Loss And Loss Adjustment Expense Reserves	Dec. 31, 2023
Insurance Loss Reserves [Abstract]
Loss And Loss Adjustment Expense Reserves	Loss and Loss Adjustment Expense Reserves The following table presents the activity in loss and loss adjustment expense reserves: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Gross reserves at January 1 $ 2,584,910 $ 2,226,430 $ 1,991,304 Reinsurance recoverables on unpaid losses (25,323) (41,379) (54,461) Net reserves at January 1 2,559,587 2,185,051 1,936,843 Incurred losses and loss adjustment expenses related to: Current year 3,553,801 3,314,938 2,786,246 Prior years (35,948) 47,281 (26,091) Total incurred losses and loss adjustment expenses 3,517,853 3,362,219 2,760,155 Loss and loss adjustment expense payments related to: Current year 2,080,690 1,862,006 1,601,998 Prior years 1,243,196 1,125,677 909,949 Total payments 3,323,886 2,987,683 2,511,947 Net reserves at December 31 2,753,554 2,559,587 2,185,051 Reinsurance recoverables on unpaid losses 32,148 25,323 41,379 Gross reserves at December 31 $ 2,785,702 $ 2,584,910 $ 2,226,430 During 2022, inflationary trends accelerated to their highest level in decades, which had a significant impact on the cost of automobile parts and labor as well as medical expenses for bodily injuries, and supply chain and labor shortage issues lengthened the time to repair vehicles. Bodily injury costs were also under pressure from social inflation. The severe inflationary trend continued into 2023, but began moderating as the year progressed. These factors contributed to higher losses and loss adjustment expenses related to the current accident year for 2023 and 2022 compared to 2021. The decrease in the provision for insured events of prior years in 2023 of approximately $35.9 million primarily resulted from lower than estimated losses and loss adjustment expenses in the private passenger automobile and homeowners lines of insurance business, partially offset by unfavorable reserve development in the commercial property line of insurance business. The moderating inflationary trend in 2023 relative to 2022 discussed above was the major contributor to the favorable reserve development in the private passenger automobile line of insurance business for 2023. The increase in the provision for insured events of prior years in 2022 of approximately $47.3 million primarily resulted from higher than estimated losses and loss adjustment expenses in the automobile line of insurance business. The inflationary pressures and the supply chain and labor shortage issues discussed above were major contributors to the adverse reserve development in the automobile line of insurance business for 2022. The decrease in the provision for insured events of prior years in 2021 of approximately $26.1 million primarily resulted from lower than estimated losses and loss adjustment expenses in the homeowners and private passenger automobile lines of insurance business. The Company recorded catastrophe losses net of reinsurance of approximately $239 million, $102 million, and $104 million in 2023, 2022, and 2021, respectively. Catastrophe losses due to the events that occurred in 2023 totaled approximately $247 million, w ith no reinsurance benefits used for these losses, resulting primarily from rainstorms and hail in Texas and Oklahoma, winter storms and rainstorms in California, and the impact of Tropical Storm Hilary in California. In addition, the Company experienced favorable development of approximately $8 million on prior years' catastrophe losses in 2023. Catastrophe losses due to the events that occurred in 2022 totaled approximately $101 million, with no reinsurance benefits used for these losses, resulting primarily from the deep freeze of Winter Storm Elliott and other extreme weather events in Texas, Oklahoma and Georgia, winter storms in California, and the impact of Hurricane Ian in Florida. In addition, the Company experienced unfavorable development of approximately $1 million on prior years' catastrophe losses in 2022. Catastrophe losses due to the events that occurred in 2021 totaled approximately $109 million, with no reinsurance benefits used for these losses, resulting primarily from the deep freeze of Winter Storm Uri and other extreme weather events in Texas and Oklahoma, rainstorms, wildfires and winter storms in California, and the impact of Hurricane Ida in New Jersey and New York. In addition, the Company experienced favorable development of approximately $5 million on prior years' catastrophe losses in 2021. The following is information about incurred and paid claims development as of December 31, 2023, net of reinsurance, as well as cumulative claim frequency and the total of incurred-but-not-reported liabilities plus expected development on reported claims included within the net incurred claims amounts for our two major product lines: automobile and homeowners lines of business. As the information presented is for these two major product lines only, the total incurred and paid claims development shown below does not correspond to the aggregate development presented in the table above, which is for all product lines and includes unallocated claims adjustment expenses. The cumulative number of reported claims represents open claims, claims closed with payment, and claims closed without payment. It does not include an estimated amount for unreported claims. The number of claims is measured by claim event (such as a car accident or storm damage) and an individual claim event may result in more than one reported claim. The Company considers a claim that does not result in a liability as a claim closed without payment. The information about incurred and paid claims development for the years ended December 31, 2014 to 2022 is presented as unaudited supplementary information. Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance (Automobile Insurance) As of December 31, 2023 Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims Cumulative Number of Reported Claims Accident Year For the Years Ended December 31, 2014 (1) 2015 (1) 2016 (1) 2017 (1) 2018 (1) 2019 (1) 2020 (1) 2021 (1) 2022 (1) 2023 (Amounts in thousands) (Amounts in thousands) 2014 $ 1,467,175 $ 1,454,366 $ 1,473,545 $ 1,486,322 $ 1,498,504 $ 1,501,075 $ 1,501,713 $ 1,501,850 $ 1,502,161 $ 1,502,313 $ 58 180 2015 1,551,105 1,588,443 1,610,839 1,634,435 1,645,950 1,649,170 1,653,878 1,654,843 1,655,267 336 170 2016 1,672,853 1,669,642 1,713,696 1,731,997 1,732,410 1,740,807 1,743,417 1,745,513 2,544 155 2017 1,703,857 1,727,277 1,741,825 1,733,425 1,748,289 1,755,702 1,754,356 4,910 149 2018 1,781,817 1,773,502 1,785,071 1,806,240 1,807,297 1,811,302 12,992 147 2019 1,916,269 1,911,268 1,959,262 1,954,151 1,951,924 22,464 148 2020 1,514,551 1,448,083 1,452,343 1,430,973 36,124 91 2021 1,811,064 1,879,751 1,854,319 96,072 104 2022 2,255,032 2,264,193 238,987 116 2023 2,349,659 673,888 100 Total $ 18,319,819 __________ (1) The information for the years 2014 to 2022 is presented as unaudited supplemental information. Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance (Automobile Insurance) For the Years Ended December 31, Accident Year 2014 (1) 2015 (1) 2016 (1) 2017 (1) 2018 (1) 2019 (1) 2020 (1) 2021 (1) 2022 (1) 2023 (Amounts in thousands) 2014 $ 967,481 $ 1,231,413 $ 1,358,472 $ 1,432,472 $ 1,476,944 $ 1,490,366 $ 1,496,814 $ 1,500,243 $ 1,501,483 $ 1,502,305 2015 1,040,253 1,336,223 1,466,368 1,560,480 1,614,188 1,634,780 1,643,443 1,651,465 1,654,069 2016 1,094,006 1,395,199 1,554,217 1,656,192 1,699,069 1,722,293 1,736,697 1,740,902 2017 1,076,079 1,399,202 1,561,850 1,648,328 1,701,298 1,733,196 1,746,147 2018 1,082,127 1,417,637 1,588,049 1,697,228 1,757,923 1,784,876 2019 1,134,859 1,494,342 1,698,121 1,828,410 1,896,186 2020 825,398 1,089,096 1,242,000 1,328,686 2021 992,705 1,410,748 1,599,756 2022 1,237,725 1,743,364 2023 1,313,943 Total $ 16,310,234 All outstanding liabilities before 2014, net of reinsurance 10 Loss and allocated loss adjustment expense reserves, net of reinsurance $ 2,009,595 __________ (1) The information for the years 2014 to 2022 is presented as unaudited supplemental information. Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance (Homeowners Insurance) As of December 31, 2023 Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims Cumulative Number of Reported Claims Accident Year For the Years Ended December 31, 2014 (1) 2015 (1) 2016 (1) 2017 (1) 2018 (1) 2019 (1) 2020 (1) 2021 (1) 2022 (1) 2023 (Amounts in thousands) (Amounts in thousands) 2014 $ 199,298 $ 202,621 $ 203,218 $ 202,513 $ 204,986 $ 208,003 $ 208,743 $ 209,622 $ 209,071 $ 208,990 $ — 25 2015 234,800 234,881 233,501 236,855 238,652 239,941 240,927 237,872 237,994 150 24 2016 250,691 259,489 259,497 259,708 260,496 259,984 259,722 259,701 48 24 2017 309,491 295,163 288,322 289,869 289,294 291,360 290,909 227 30 2018 311,798 308,361 310,695 305,292 306,347 308,345 3,131 25 2019 359,643 366,139 361,421 360,609 360,140 1,278 30 2020 420,257 411,404 413,882 411,408 5,728 29 2021 510,724 511,311 504,086 11,687 31 2022 578,489 562,562 23,284 30 2023 717,988 147,258 39 Total $ 3,862,123 __________ (1) The information for the years 2014 to 2022 is presented as unaudited supplemental information. Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance (Homeowners Insurance) For the Years Ended December 31, Accident Year 2014 (1) 2015 (1) 2016 (1) 2017 (1) 2018 (1) 2019 (1) 2020 (1) 2021 (1) 2022 (1) 2023 (Amounts in thousands) 2014 $ 139,615 $ 186,996 $ 194,605 $ 198,758 $ 202,193 $ 203,333 $ 207,524 $ 207,801 $ 208,737 $ 208,866 2015 163,196 213,994 224,178 230,480 234,683 235,971 236,143 236,983 237,651 2016 173,537 234,215 245,878 253,919 256,642 258,477 259,045 259,875 2017 217,900 269,254 278,341 283,311 286,531 290,291 290,984 2018 213,038 271,534 286,658 294,099 300,742 303,053 2019 240,240 324,953 340,237 350,288 355,697 2020 271,208 365,910 386,297 395,412 2021 316,314 458,124 473,644 2022 339,242 501,075 2023 474,712 Total $ 3,500,969 All outstanding liabilities before 2014, net of reinsurance 1,044 Loss and allocated loss adjustment expense reserves, net of reinsurance $ 362,198 __________ (1) The information for the years 2014 to 2022 is presented as unaudited supplemental information. The following is unaudited supplementary information about average historical claims duration as of December 31, 2023. Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance Years 1 2 3 4 5 6 7 8 9 10 Automobile insurance 59.1 % 19.0 % 9.4 % 5.7 % 3.1 % 1.4 % 0.6 % 0.3 % 0.1 % 0.1 % Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance Years 1 2 3 4 5 6 7 8 9 10 Homeowners insurance 66.8 % 23.0 % 4.1 % 2.4 % 1.5 % 0.8 % 0.6 % 0.3 % 0.4 % 0.1 % The reconciliation of the net incurred and paid claims development tables to the liability for claims and claim adjustment expenses in the consolidated balance sheets is as follows: Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Loss and Loss Adjustment Expense Reserves December 31, 2023 (Amounts in thousands) Net outstanding liabilities Automobile insurance $ 2,009,595 Homeowners insurance 362,198 Other short-duration insurance lines 236,069 Loss and loss adjustment expense reserves, net of reinsurance recoverables on unpaid losses 2,607,862 Reinsurance recoverables on unpaid losses Automobile insurance 27,528 Homeowners insurance 3,903 Other short-duration insurance lines 717 Total reinsurance recoverables on unpaid losses 32,148 Insurance lines other than short-duration 1,072 Unallocated claims adjustment expenses 144,620 145,692 Total gross loss and loss adjustment expense reserves $ 2,785,702

Dividends

Dividends	12 Months Ended
Dividends	Dec. 31, 2023
Dividends [Abstract]
Dividends	Dividends The following table presents shareholder dividends paid: Year Ended December 31, 2023 2022 2021 (Amounts in thousands, except per share data) Total paid $ 70,322 $ 105,482 $ 140,226 Per share paid $ 1.2700 $ 1.9050 $ 2.5325 The Insurance Companies are subject to the financial capacity guidelines established by their domiciliary states. The payment of dividends from statutory unassigned surplus of the Insurance Companies is restricted, subject to certain statutory limitations. As of December 31, 2023, the insurance subsidiaries of the Company are permitted to pay approximately $163 million in dividends in 2024 to Mercury General without the prior approval of the DOI of domiciliary states. The above statutory regulations may have the effect of indirectly limiting the ability of the Company to pay shareholder dividends. During 2023, 2022, and 2021, the Insurance Companies paid Mercury General ordinary dividends of $0, $0, and $191 million, respectively. On February 9, 2024, the Board of Directors declared a $0.3175 quarterly dividend payable on March 27, 2024 to shareholders of record on March 13, 2024.

Statutory Balances and Accounti

Statutory Balances and Accounting Practices	12 Months Ended
Statutory Balances and Accounting Practices	Dec. 31, 2023
Statutory Balances And Accounting Practices [Abstract]
Statutory Balances and Accounting Practices	Statutory Balances and Accounting Practices The Insurance Companies prepare their statutory-basis financial statements in conformity with accounting practices prescribed or permitted by the insurance departments of their domiciliary states. Prescribed statutory accounting practices primarily include those published as statements of statutory accounting principles by the National Association of Insurance Commissioners (the "NAIC"), as well as state laws, regulations, and general administrative rules. Permitted statutory accounting practices encompass all accounting practices not so prescribed. As of December 31, 2023, there were no material permitted statutory accounting practices utilized by the Insurance Companies. The following table presents the statutory net income, and statutory capital and surplus of the Insurance Companies, as reported to regulatory authorities: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Statutory net (loss) income (1) $ (35,590) $ (184,292) $ 200,488 Statutory capital and surplus $ 1,667,187 $ 1,502,424 $ 1,827,210 __________ (1) Statutory net (loss) income reflects differences from GAAP net income (loss), including changes in the fair value of the investment portfolio as a result of the application of the fair value option.

Profit Sharing Plan and Annual

Profit Sharing Plan and Annual Cash Bonuses	12 Months Ended
Profit Sharing Plan and Annual Cash Bonuses	Dec. 31, 2023
Deferred Compensation Arrangements [Abstract]
Profit Sharing Plan and Annual Cash Bonuses	Profit Sharing Plan and Annual Cash Bonuses The Company’s employees are eligible to become members of the Profit Sharing Plan (the "Plan"). The Company, at the option of the Board of Directors, may make annual contributions to the Plan, and the contributions are not to exceed the greater of the Company’s net income for the plan year or its retained earnings at that date. In addition, the annual contributions may not exceed an amount equal to 15% of the compensation paid or accrued during the year to all participants under the Plan. No contributions were made in the past three years. The Plan includes an option for employees to make salary deferrals under Section 401(k) of the Internal Revenue Code. Matching contributions, at a rate set by the Board of Directors, totaled approximately $11.1 million, $10.8 million, and $10.4 million for 2023, 2022, and 2021, respectively. The Plan also includes an employee stock ownership plan that covers substantially all employees. The Board of Directors authorizes the Plan to purchase the Company’s common stock in the open market for allocation to the Plan participants. No purchases were made during the past three years.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
Share-Based Compensation	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Share-Based Compensation	Share-Based Compensation In February 2015, the Company adopted the 2015 Incentive Award Plan (the "2015 Plan"), replacing the 2005 Equity Incentive Plan (the "2005 Plan") which expired in January 2015. The 2015 Plan was approved at the Company's Annual Meeting of Shareholders in May 2015. A maximum of 4,900,000 shares of common stock under the 2015 Plan are authorized for issuance upon exercise of stock options, stock appreciation rights and other awards, or upon vesting of RSU or deferred stock awards. The Company had granted 80,000 stock options under the 2015 Plan, 10,000 of which were forfeited, with 4,830,000 shares of common stock available for future grant as of December 31, 2023. No share-based compensation awards have been granted since March 2018 under the 2015 Plan. The following table presents a summary of cash received, compensation costs recognized and excess tax benefit, related to the Company's share-based awards: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Cash received from stock option exercises $ — $ — $ 215 Compensation cost, all share-based awards — 15 141 Excess tax benefit, all share-based awards — (1) (117) Stock Option Awards Stock option awards become exercisable at a rate of 25% per year beginning one year from the date granted, are granted at the closing price of the Company's stock on the date of grant, and expire after 10 years. In February 2018, the Compensation Committee of the Company's Board of Directors awarded a total of 80,000 stock options to four senior executives under the 2015 Plan which will vest over the four-year requisite service period. 10,000 of these stock options were forfeited in February 2019 following the departure of a senior executive. The fair values of these stock options were estimated on the date of grant using a closed-form option valuation model (Black-Scholes). The following table provides the assumptions used in the calculation of grant-date fair values of these stock options based on the Black-Scholes option pricing model: Weighted-average grant-date fair value $ 8.09 Expected volatility 33.18 % Risk-free interest rate 2.62 % Expected dividend yield 5.40 % Expected term in months 72 Expected volatility is based on historical volatility of the Company’s stock over the term of the stock options. The Company estimated the expected term of stock options, which represents the period of time that stock options granted are expected to be outstanding, by using historical exercise patterns and post-vesting termination behavior. The risk free interest rate is determined based on U.S. Treasury yields with equivalent remaining terms in effect at the time of the grant. The following table presents a summary of the stock option activity for the year ended December 31, 2023: Shares Weighted-Average Weighted-Average Aggregate Outstanding at January 1, 2023 17,500 $ 43.01 Exercised — $ — Canceled or expired — $ — Outstanding at December 31, 2023 17,500 $ 43.01 4.1 $ — Exercisable at December 31, 2023 17,500 $ 43.01 4.1 $ — The aggregate intrinsic values in the table above represent the total pre-tax intrinsic value (the difference between the Company’s closing stock price and the stock option exercise price, multiplied by the number of in-the-money stock options) that would have been received by the stock option holders had all stock options been exercised on December 31, 2023. The aggregate intrinsic value of stock options exercised was $29,975 and $1,007,175 for 2022 and 2021, respectively. There were no stock options exercised in 2023. The total fair value of stock options vested was $141,584 for each of 2022 and 2021. There were no stock options vested in 2023. The following table presents information regarding stock options outstanding at December 31, 2023: Options Outstanding Options Exercisable Exercise Price Number of Weighted-Average Weighted- Number of Weighted- $43.01 17,500 4.1 $ 43.01 17,500 $ 43.01

Earnings (Loss) Per Share

Earnings (Loss) Per Share	12 Months Ended
Earnings (Loss) Per Share	Dec. 31, 2023
Earnings Per Share Reconciliation [Abstract]
Earnings (Loss) Per Share	Earnings (Loss) Per Share The following table presents a reconciliation of the numerators and denominators of the basic and diluted earnings (loss) per share calculations: Year Ended December 31, 2023 2022 2021 Net Income Weighted Average Per-Share Net Loss Weighted Average Per-Share Net Income Weighted Average Per-Share (Amounts and numbers in thousands, except per-share data) Basic EPS Income (loss) available to common stockholders $ 96,336 55,371 $ 1.74 $ (512,672) 55,371 $ (9.26) $ 247,937 55,368 $ 4.48 Effect of dilutive securities: Options — — — — — 6 Diluted EPS Income (loss) available to common stockholders after assumed conversions $ 96,336 55,371 $ 1.74 $ (512,672) 55,371 $ (9.26) $ 247,937 55,374 $ 4.48 Potentially dilutive securities representing approximately 17,500 shares of common stock were excluded from the computation of diluted earnings (loss) per common share for each of 2023 and 2022, because their effect would have been anti-dilutive. For 2022, 26 incremental shares were also excluded from the computation of diluted loss per share as the Company generated a net loss in 2022. There were no potentially dilutive securities with anti-dilutive effect for 2021.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Leases The Company is obligated under various non-cancellable lease agreements providing for office space, automobiles, office equipment, and EDP equipment that expire at various dates through the year 2028. See Note 7. Leases for additional information on leases and future lease payments as of December 31, 2023. California Earthquake Authority ("CEA") The CEA is a quasi-governmental organization that was established to provide a market for earthquake coverage to California homeowners. The Company places all new and renewal earthquake coverage offered with its homeowners policies directly with the CEA. The Company receives a small fee for placing business with the CEA, which is recorded as other income in the consolidated statements of operations. Upon the occurrence of a major seismic event, the CEA has the ability to assess participating companies for losses. These assessments are made after CEA capital has been expended and are based upon each company’s participation percentage multiplied by the amount of the total assessment. Based upon the most recent information provided by the CEA, the Company’s maximum total exposure to CEA assessments at April 30, 2023, the most recent date at which information was available, was approximately $85.6 million. There was no assessment made in 2023. Regulatory and Legal Matters On October 5, 2021, the Company received a letter from the California DOI requesting additional information on the amount of premium refunds or credits that the Company has provided or plans to further provide to its private passenger automobile policyholders, and the methodology used in determining such refunds or credits for the time period of March 2020 through at least March 2021, due to reduced driving during the pandemic. On October 6, 2021, the California DOI issued a press release alleging that the Company and two other insurers have not provided enough premium relief to the policyholders through premium refunds or credits for lower frequency resulting from reduced driving during the pandemic. Two private actions against the Company were also filed during the first quarter of 2022, asserting substantially the same arguments on behalf of an alleged class of similarly situated policyholders, and seeking restitution of the allegedly excessive premiums charged during the pandemic. On November 21, 2022, after its review of loss and expense data requested from and provided by the Company, the California DOI notified the Company that an additional total refund of approximately $52 million should be provided to its private passenger automobile policyholders, purportedly based upon its analysis of the Company’s data. The Company believes that the amounts returned to-date, including the mileage reductions on individual policies, have provided appropriate and material relief to its policyholders and that there is no legal basis for the California DOI or the courts to require the Company to issue additional refunds. The total amount of premiums returned to the Company's policyholders through refunds or credits is approximately $128 million, which reduced its net premiums earned for 2020. The Company has also worked with its agents and policyholders to reclassify exposures on an individual policy basis, including reducing mileage on a large number of vehicles since the pandemic began. Management believes the mileage reductions have significantly reduced premiums on those individual policies in a manner consistent with the Company’s filed and approved rates. The Company engaged in discussions with the California DOI, and on April 24, 2023, the Company entered into a stipulated settlement agreement with the California DOI (the “Settlement Stipulation”), which fully resolved all issues related to the California DOI’s alleged COVID refund obligations, with the exception of a similar issue involving Orion Indemnity Company, a small consolidated subsidiary of the Company, that was settled separately with the California DOI on May 15, 2023 for approximately $0.25 million paid to its existing California private passenger automobile policyholders. Under the Settlement Stipulation, the Company agreed to provide an aggregate credit amount of $25 million to the existing California private passenger automobile policyholders of MIC and CAIC, significant consolidated subsidiaries of the Company, by means of credits against the future private passenger automobile renewal premium obligations over a period not to exceed 18 months commencing on July 7, 2023. The renewal premium credits are recorded as reductions to the Company’s net premiums earned and written in the periods when the applicable policies are renewed. Although the Company believes the voluntary amounts returned to date have provided appropriate relief to its policyholders and there is no legal basis for the California DOI to require the Company to issue additional refunds, the Company agreed to the Settlement Stipulation to resolve the matter and facilitate timely review and approval of its pending rate applications. The Company filed a motion to dismiss the two private actions seeking COVID-related restitution, based on the California case law barring such retroactive relief and the resolution with the California DOI. In August 2023, the court granted the Company's motion to dismiss, and the judgment in the Company's favor is now final. On September 10, 2021, the California DOI served the Company a Notice of Non-Compliance ("NNC"), alleging violations in connection with its 2014 Rating & Underwriting Examination Report, which was adopted by the California DOI in 2019. The NNC itemizes alleged violations, many of which management believes were corrected or otherwise resolved during the course of the examination, and seeks penalties. The Company has participated in lengthy and detailed discussions with the California DOI since the adoption of the examination report, in an attempt to address the issues deemed unresolved by the California DOI, and has taken several additional corrective actions approved by the California DOI. The Company is continuing discussions with the California DOI to resolve the outstanding issues, or at least obtain the agreement of the California DOI to remove the resolved items from the NNC before proceeding to a formal hearing process if a settlement is not reached. On August 1, 2022, the California DOI publicly announced its intention to pursue an administrative action against the Company with respect to certain outstanding issues. The Company filed a written response to the NNC on September 29, 2022. The response, consisting of a notice of defense, a motion to strike, and a motion to dismiss, challenges the NNC on procedural and substantive grounds. On November 9, 2022, the California DOI served objections and non-substantive responses to the Company's discovery requests. The Company is continuing settlement discussions with the California DOI. The parties are also conferring regarding the possible filing of an Amended NNC that would eliminate the resolved items and identify the remaining issues in dispute should the matter proceed to a hearing. The parties agreed to conduct a mediation to attempt resolution, which is currently scheduled for March 4, 2024. On November 14, 2023, the California DOI granted Consumer Watchdog's petition to intervene in the NNC, although the Company has not agreed to allow its involvement in the mediation. The Company cannot reasonably predict the likelihood, timing or outcome of any hearing process or administrative action, nor can it reasonably estimate the amount of penalties, if any. The Company is, from time to time, named as a defendant in various lawsuits or regulatory actions incidental to its insurance business. The majority of lawsuits brought against the Company relate to insurance claims that arise in the normal course of business and are reserved for through the reserving process. For a discussion of the Company’s reserving methods, see Note 1. Summary of Significant Accounting Policies. The Company also establishes accruals for estimated liabilities for non-insurance claims related lawsuits, regulatory actions, and other contingencies when the Company believes a loss is probable and is able to estimate its potential exposure. For loss contingencies believed to be reasonably possible, the Company also discloses the nature of the loss contingency and an estimate of the possible loss, range of loss, or a statement that such an estimate cannot be made. In addition, the Company accrues for anticipated legal defense costs associated with such lawsuits and regulatory actions. While actual losses may differ from the amounts recorded and the ultimate outcome of the Company’s pending actions is generally not yet determinable, the Company does not believe that the ultimate resolution of currently pending legal or regulatory proceedings, either individually or in the aggregate, will have a material adverse effect on its financial condition or cash flows. The Company is also involved in proceedings relating to assessments made by the FTB. See Note 11. Income Taxes.

Segment Information

Segment Information	12 Months Ended
Segment Information	Dec. 31, 2023
Segment Reporting [Abstract]
Segment Information	Segment Information The Company is primarily engaged in writing personal automobile insurance and provides related property and casualty insurance products to its customers through 12 subsidiaries in 11 states, principally in California. The Company has one reportable business segment - the Property and Casualty business segment. The Company’s Chief Operating Decision Maker evaluates operating results based on pre-tax underwriting results which is calculated as net premiums earned less (a) losses and loss adjustment expenses and (b) underwriting expenses (policy acquisition costs and other operating expenses). Expenses are allocated based on certain assumptions that are primarily related to premiums and losses. The Company’s net investment income, net realized investment gains (losses), other income, and interest expense are excluded in evaluating pre-tax underwriting profit. The Company does not allocate its assets, including investments, or income taxes in evaluating pre-tax underwriting profit. Property and Casualty Lines The Property and Casualty business segment offers several insurance products to the Company’s individual customers and small business customers. These insurance products are: private passenger automobile, which is the Company’s primary business, and related insurance products such as homeowners, commercial automobile and commercial property. These insurance products are primarily sold to the Company’s individual customers and small business customers, which increases retention of the Company’s private personal automobile client base. The insurance products comprising the Property and Casualty business segment are sold through the same distribution channels, mainly through independent and 100% owned insurance agents, and go through a similar underwriting process. Other Lines The Other business segment represents net premiums written and earned from an operating segment that does not meet the quantitative thresholds required to be considered a reportable segment. This operating segment offers automobile mechanical protection warranties which are primarily sold through automobile dealerships and credit unions. The following table presents operating results by reportable segment for the years ended: Year Ended December 31, 2023 2022 2021 Property & Casualty Other Total Property & Casualty Other Total Property & Casualty Other Total (Amounts in millions) Net premiums earned $ 4,245.4 $ 29.0 $ 4,274.4 $ 3,923.6 $ 28.9 $ 3,952.5 $ 3,712.9 $ 29.0 $ 3,741.9 Less: Losses and loss adjustment expenses 3,502.2 15.7 3,517.9 3,347.2 15.0 3,362.2 2,746.3 13.9 2,760.2 Underwriting expenses 973.4 14.7 988.1 922.1 12.3 934.4 902.6 14.1 916.7 Underwriting (loss) gain (230.2) (1.4) (231.6) (345.7) 1.6 (344.1) 64.0 1.0 65.0 Investment income 234.6 168.4 129.7 Net realized investment gains (losses) 101.0 (488.1) 111.7 Other income 19.6 10.3 10.0 Interest expense (24.2) (17.2) (17.1) Pre-tax income (loss) $ 99.4 $ (670.7) $ 299.3 Net income (loss) $ 96.3 $ (512.7) $ 247.9 The following table presents the Company’s net premiums earned and direct premiums written by line of insurance business for the years ended: Year Ended December 31, 2023 2022 2021 Property & Casualty Other Total Property & Casualty Other Total Property & Casualty Other Total (Amounts in millions) Private passenger automobile $ 2,796.1 $ — $ 2,796.1 $ 2,655.7 $ — $ 2,655.7 $ 2,613.5 $ — $ 2,613.5 Homeowners 957.7 — 957.7 830.6 — 830.6 698.1 — 698.1 Commercial automobile 303.9 — 303.9 267.9 — 267.9 258.6 — 258.6 Other 187.7 29.0 216.7 169.4 28.9 198.3 142.7 29.0 171.7 Net premiums earned $ 4,245.4 $ 29.0 $ 4,274.4 $ 3,923.6 $ 28.9 $ 3,952.5 $ 3,712.9 $ 29.0 $ 3,741.9 Private passenger automobile $ 2,841.8 $ — $ 2,841.8 $ 2,598.9 $ — $ 2,598.9 $ 2,640.7 $ — $ 2,640.7 Homeowners 1,119.0 — 1,119.0 940.3 — 940.3 801.5 — 801.5 Commercial automobile 346.2 — 346.2 276.8 — 276.8 259.9 — 259.9 Other 224.9 26.6 251.5 202.1 30.4 232.5 175.4 30.0 205.4 Direct premiums written $ 4,531.9 $ 26.6 $ 4,558.5 $ 4,018.1 $ 30.4 $ 4,048.5 $ 3,877.5 $ 30.0 $ 3,907.5

Summary Of Investments Other Th

Summary Of Investments Other Than Investments In Related Parties	12 Months Ended
	Dec. 31, 2023
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]
Summary Of Investments Other Than Investments In Related Parties	Type of Investment Cost Fair Value Amounts in the (Amounts in thousands) Fixed maturity securities: U.S. government bonds $ 174,903 $ 174,450 $ 174,450 Municipal securities 2,797,971 2,777,258 2,777,258 Mortgage-backed securities 201,727 186,887 186,887 Corporate securities 626,723 599,630 599,630 Collateralized loan obligations 486,984 484,947 484,947 Other asset-backed securities 106,675 96,164 96,164 Total fixed maturity securities 4,394,983 4,319,336 4,319,336 Equity securities: Common stock 497,543 597,888 597,888 Non-redeemable preferred stock 64,860 51,563 51,563 Private equity funds measured at net asset value (1) 92,536 81,242 81,242 Total equity securities 654,939 730,693 730,693 Short-term investments 179,375 178,491 178,491 Total investments $ 5,229,297 $ 5,228,520 $ 5,228,520 __________ (1) The fair value is measured using the NAV practical expedient. See Note 4. Fair Value Measurements of the Notes to Consolidated Financial Statements for additional information. SCHEDULE I, Continued MERCURY GENERAL CORPORATION AND SUBSIDIARIES SUMMARY OF INVESTMENTS OTHER THAN INVESTMENTS IN RELATED PARTIES DECEMBER 31, 2022 Type of Investment Cost Fair Value Amounts in the (Amounts in thousands) Fixed maturity securities: U.S. government bonds $ 159,256 $ 158,607 $ 158,607 Municipal securities 2,794,476 2,737,183 2,737,183 Mortgage-backed securities 184,936 166,260 166,260 Corporate securities 607,945 569,553 569,553 Collateralized loan obligations 332,859 320,252 320,252 Other asset-backed securities 147,318 136,456 136,456 Total fixed maturity securities 4,226,790 4,088,311 4,088,311 Equity securities: Common stock 463,940 558,169 558,169 Non-redeemable preferred stock 64,686 51,236 51,236 Private equity funds measured at net asset value (1) 140,217 90,147 90,147 Total equity securities 668,843 699,552 699,552 Short-term investments 123,928 122,937 122,937 Total investments $ 5,019,561 $ 4,910,800 $ 4,910,800 __________ (1) The fair value is measured using the NAV practical expedient. See Note 4. Fair Value Measurements of the Notes to Consolidated Financial Statements for additional information.

Condensed Financial Information

Condensed Financial Information of Registrant	12 Months Ended
Condensed Financial Information of Registrant	Dec. 31, 2023
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information of Registrant	December 31, 2023 2022 (Amounts in thousands) ASSETS Investments, at fair value: Fixed maturity securities (amortized cost $9,979; $10,908) $ 9,949 $ 10,907 Equity securities (cost $17,227; $35,041) 28,027 51,416 Short-term investments (cost $571; $27,057) 571 27,059 Investment in subsidiaries 2,084,346 1,833,372 Total investments 2,122,893 1,922,754 Cash 4,698 6,218 Accrued investment income 141 149 Amounts receivable from affiliates 503 516 Current income taxes 5,148 55,777 Deferred income taxes 1,544 1,072 Income tax receivable from affiliates 15,161 12,865 Other assets 1,499 1,493 Total assets $ 2,151,587 $ 2,000,844 LIABILITIES AND SHAREHOLDERS’ EQUITY Notes payable $ 573,729 $ 398,330 Amounts payable to affiliates 2,753 90 Income tax payable to affiliates 21,209 75,079 Other liabilities 5,751 5,214 Total liabilities 603,442 478,713 Commitments and contingencies Shareholders’ equity: Common stock 98,947 98,947 Retained earnings 1,449,198 1,423,184 Total shareholders’ equity 1,548,145 1,522,131 Total liabilities and shareholders’ equity $ 2,151,587 $ 2,000,844 SCHEDULE II, Continued MERCURY GENERAL CORPORATION CONDENSED FINANCIAL INFORMATION OF REGISTRANT STATEMENTS OF OPERATIONS Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Revenues: Net investment income $ 2,998 $ 2,696 $ 2,560 Net realized investment gains (losses) 1,431 (12,969) 26,523 Total revenues 4,429 (10,273) 29,083 Expenses: Other operating expenses 2,526 2,446 2,627 Interest 24,129 17,178 17,088 Total expenses 26,655 19,624 19,715 (Loss) income before income taxes and equity in net income (loss) of subsidiaries (22,226) (29,897) 9,368 Income tax (benefit) expense (4,379) (10,234) 4,930 (Loss) income before equity in net income (loss) of subsidiaries (17,847) (19,663) 4,438 Equity in net income (loss) of subsidiaries 114,183 (493,009) 243,499 Net income (loss) $ 96,336 $ (512,672) $ 247,937 SCHEDULE II, Continued MERCURY GENERAL CORPORATION CONDENSED FINANCIAL INFORMATION OF REGISTRANT STATEMENTS OF CASH FLOWS Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Cash flows from operating activities: Net cash (used in) provided by operating activities $ (14,703) $ 225 $ (36,662) Cash flows from investing activities: Capital contribution to subsidiaries (150,000) — — Capital distribution from subsidiaries — 3,431 — Distributions received from special purpose entities 6,210 2,904 5,199 Dividends received from subsidiaries — — 191,000 Fixed maturity securities available for sale in nature Purchases — (11,905) — Sales — 1,000 — Calls or maturities 955 — — Equity securities available for sale in nature Purchases (1,172) (5,307) (13,151) Sales 25,848 48,215 38,092 Decrease (increase) in short-term investments 26,481 (6,268) (16,172) Other, net 183 667 791 Net cash (used in) provided by investing activities (91,495) 32,737 205,759 Cash flows from financing activities: Dividends paid to shareholders (70,322) (105,482) (140,226) Proceeds from stock options exercised — — 215 Proceeds from bank loan 175,000 25,000 — Net cash provided by (used in) financing activities 104,678 (80,482) (140,011) Net (decrease) increase in cash (1,520) (47,520) 29,086 Cash: Beginning of year 6,218 53,738 24,652 End of year $ 4,698 $ 6,218 $ 53,738 SUPPLEMENTAL CASH FLOW DISCLOSURE Interest paid $ 22,959 $ 16,611 $ 16,590 Income taxes paid (refunded), net $ 1,630 $ (14,102) $ 18,841 The accompanying condensed financial information should be read in conjunction with the Consolidated Financial Statements and Notes to Consolidated Financial Statements included in this report. Distributions received from Special Purpose Investment Vehicles From time to time, the Company forms special purpose investment vehicles to facilitate its investment activities involving derivative instruments such as total return swaps, or limited partnerships such as private equity funds. For the three years ended December 31, 2023, the Company had two such special purpose investment vehicles: Fannette Funding LLC and Animas Funding LLC. These special purpose investment vehicles are consolidated into the Company. Creditors have no recourse against the Company in the event of default by these special purpose investment vehicles. The Company had no implied or unfunded commitments to these entities at December 31, 2023 and 2022. The Company's financial or other support provided to these entities and its loss exposure are limited to its collateral and original investment. Mercury General received distributions of $6.2 million, $2.9 million, and $5.2 million in 2023, 2022, and 2021, respectively, from these special purpose investment vehicles. Dividends received from Subsidiaries Dividends of $0, $0 and $191 million were received by Mercury General from its 100% owned insurance subsidiaries in 2023, 2022 and 2021, respectively, and were recorded as a reduction to investment in subsidiaries. Capitalization of Insurance Subsidiaries Mercury General made capital contributions to its insurance subsidiaries of $150 million, $0 and $0 in 2023, 2022 and 2021, respectively. In addition, Mercury General received a capital distribution from its insurance subsidiaries of $0, $3,431,433, and $0 in 2023, 2022 and 2021, respectively. The capital distribution for 2022 was related to the dissolution of an insurance subsidiary in November 2022, pursuant to which Mercury General received the complete return of its invested capital. Notes Payable On March 8, 2017, Mercury General completed a public debt offering issuing $375 million of senior notes. The notes are unsecured senior obligations of Mercury General, with a 4.4% annual coupon payable on March 15 and September 15 of each year commencing September 15, 2017. These notes mature on March 15, 2027. The Company used the proceeds from the notes to pay off the total outstanding balance of $320 million under the existing loan and credit facility agreements and terminated the agreements on March 8, 2017. The remainder of the proceeds from the notes was used for general corporate purposes. Mercury General incurred debt issuance costs of approximately $3.4 million, inclusive of underwriters' fees. The notes were issued at a slight discount of 99.847% of par, resulting in the effective annualized interest rate, including debt issuance costs, of approximately 4.45%. On March 31, 2021, the Company entered into an unsecured $75 million five-year revolving credit facility. On November 18, 2022, the Company entered into the First Amendment to this credit facility. The First Amendment extended the maturity date of the loan to November 16, 2026 from March 31, 2026 with possible further extension if certain conditions are met, increased the aggregate commitments by all the lenders to $200 million from $75 million, and replaced the LIBOR with the term SOFR. On November 30, 2023, the Company entered into the Second Amendment to this credit facility, which further increased the aggregate commitments by all the lenders to $250 million from $200 million. The interest rates on borrowings under the credit facility are based on the Company's debt to total capital ratio and range from Term SOFR plus 112.5 basis points when the ratio is under 20% to Term SOFR plus 150.0 basis points when the ratio is greater than or equal to 30%. Commitment fees for the undrawn portions of the credit facility range from 12.5 basis points when the ratio is under 20% to 22.5 basis points when the ratio is greater than or equal to 30%. The debt to total capital ratio is expressed as a percentage of (a) consolidated debt to (b) consolidated shareholders' equity plus consolidated debt. The Company's debt to total capital ratio was 27.1% at December 31, 2023, resulting in a 17.5 basis point commitment fee on any undrawn portion of the credit facility. As of February 13, 2024, a total of $200 million was drawn under this facility on a three-month revolving basis at an annual interest rate of approximately 6.84%, with $50 million available to be drawn. The Company contributed $150 million of the total amount drawn to the surplus of its consolidated insurance subsidiaries, and used the remainder for general corporate purposes. Federal Income Taxes The Company files a consolidated federal income tax return for the following entities: Mercury Casualty Company Mercury Indemnity Company of America Mercury Insurance Company Mercury Select Management Company, Inc. California Automobile Insurance Company Mercury Insurance Services LLC California General Underwriters Insurance Company, Inc. AIS Management LLC Mercury Insurance Company of Illinois Auto Insurance Specialists LLC Mercury Insurance Company of Georgia PoliSeek AIS Insurance Solutions, Inc. Mercury Indemnity Company of Georgia Animas Funding LLC American Mercury Insurance Company Fannette Funding LLC American Mercury Lloyds Insurance Company Mercury Plus Insurance Services LLC Orion Indemnity Company Mercury Information Technology Services LLC Mercury County Mutual Insurance Company Mercury (Shanghai) Information Technology Services Co., Ltd. The method of allocation between the companies is subject to an agreement approved by the Board of Directors. Allocation is based upon separate return calculations with current credit for net losses incurred by the insurance subsidiaries to the extent it can be used in the current consolidated return.

Supplemental Reinsurance Premiu

Supplemental Reinsurance Premiums	12 Months Ended
Supplemental Reinsurance Premiums	Dec. 31, 2023
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]
Supplemental Reinsurance Premiums	2023 2022 2021 (Amounts in thousands) Direct amounts $ 4,368,342 $ 4,022,611 $ 3,793,664 Ceded to other companies (109,445) (80,950) (65,017) Assumed 15,481 10,821 13,301 Net amounts $ 4,274,378 $ 3,952,482 $ 3,741,948

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pay vs Performance Disclosure
Net income (loss)	$ 96,336	$ (512,672)	$ 247,937

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Dec. 31, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2023
Accounting Policies [Abstract]
Consolidation and Basis of Presentation	The consolidated financial statements include the accounts of Mercury General Corporation and its subsidiaries: Insurance Companies Mercury Casualty Company ("MCC") American Mercury Insurance Company Mercury Insurance Company ("MIC") American Mercury Lloyds Insurance Company (1) California Automobile Insurance Company ("CAIC") Mercury County Mutual Insurance Company (2) California General Underwriters Insurance Company, Inc. Mercury Indemnity Company of America Mercury Insurance Company of Illinois Orion Indemnity Company Mercury Insurance Company of Georgia Mercury Indemnity Company of Georgia Non-Insurance Companies Mercury Select Management Company, Inc. AIS Management LLC Mercury Insurance Services LLC Auto Insurance Specialists LLC Animas Funding LLC ("AFL") (3) PoliSeek AIS Insurance Solutions, Inc. Fannette Funding LLC ("FFL") (3) Mercury Plus Insurance Services LLC Mercury Information Technology Services LLC (4) Mercury (Shanghai) Information Technology Services Co., Ltd. ("Mercury Shanghai") (5) __________ (1) American Mercury Lloyds Insurance Company is not owned but is controlled by the Company through its attorney-in-fact, Mercury Select Management Company, Inc. (2) Mercury County Mutual Insurance Company is not owned but is controlled by the Company through a management contract. (3) Special purpose investment vehicle. (4) Parent company of Mercury Shanghai. (5) Mercury Shanghai provides software development and related technical services to the Company's subsidiaries. The consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles ("GAAP"), which differ in some respects from those filed in reports to insurance regulatory authorities. All intercompany transactions and balances have been eliminated.
Use of Estimates	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosures of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. These estimates require the Company to apply complex assumptions and judgments, and often the Company must make estimates about effects of matters that are inherently uncertain and will likely change in subsequent periods. The most significant assumptions in the preparation of these consolidated financial statements relate to reserves for losses and loss adjustment expenses. Actual results could differ from those estimates.
Investments and Other Financial Instruments	Financial instruments recorded in the consolidated balance sheets include investments, note receivable, other receivables, accounts payable, options sold, and notes payable. The Company’s investments include securities issued by the U.S. government and its agencies, securities issued by states and municipal governments and agencies, certain corporate and other debt securities, equity securities, and exchange traded funds. The Company applies the fair value option to all fixed maturity and equity securities and short-term investments at the time an eligible item is first recognized. The primary reasons for electing the fair value option were simplification and cost benefit considerations as well as the expansion of the use of fair value measurement by the Company consistent with the long-term measurement objectives of the Financial Accounting Standards Board (the "FASB") for accounting for financial instruments. Gains and losses due to changes in fair value for items measured at fair value pursuant to application of the fair value option are included in net realized investment gains in the Company's consolidated statements of operations, while interest and dividend income on investment holdings are recognized on an accrual basis on each measurement date and are included in net investment income in the Company's consolidated statements of operations. The Company’s fixed maturity and equity securities are classified as “trading” and carried at fair value as required when applying the fair value option. The majority of equity holdings, including non-redeemable preferred stocks, are actively traded on national exchanges or trading markets, and are valued at the last transaction price on the balance sheet date. The fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Due to their short-term maturity, the carrying values of other receivables and accounts payable approximate their fair values. 98.4% of the fair value of its investments at December 31, 2023 is based on observable market prices, observable pricing parameters, or is derived from such prices or parameters. The availability of observable market prices and pricing parameters can vary by financial instrument. Observable market prices and pricing parameters of a financial instrument, or a related financial instrument, are used to derive a price without requiring significant judgment. The Company may hold or acquire financial instruments that lack observable market prices or pricing parameters because they are less actively traded currently or in future periods. The fair value of such instruments is determined using techniques appropriate for each particular financial instrument. These techniques may involve some degree of judgment. The price transparency of the particular financial instrument will determine the degree of judgment involved in determining the fair value of the Company’s financial instruments. Price transparency is affected by a wide variety of factors, including the type of financial instrument, whether it is a new financial instrument and not yet established in the marketplace, and the characteristics particular to the transaction. Financial instruments for which actively quoted prices or pricing parameters are available or for which fair value is derived from actively quoted prices or pricing parameters will generally have a higher degree of price transparency. By contrast, financial instruments that are thinly traded or not quoted will generally have diminished price transparency. Even in normally active markets, the price transparency for actively quoted financial instruments may be reduced during periods of market dislocation. Alternatively, in thinly quoted markets, the participation of market makers willing to purchase and sell a financial instrument provides a source of transparency for products that otherwise are not actively quoted. For a further discussion, see Note 4. Fair Value Measurements. Fixed maturity securities include debt securities, which may have fixed or variable principal payment schedules, may be held for indefinite periods of time, and may be used as a part of the Company’s asset/liability strategy or sold in response to changes in interest rates, anticipated prepayments, risk/reward characteristics, liquidity needs, tax planning considerations, or other economic factors. Premiums and discounts on fixed maturities are amortized using first call date and are adjusted for anticipated prepayments. Premiums and discounts on mortgage-backed securities are adjusted for anticipated prepayment using the retrospective method, with the exception of some beneficial interests in securitized financial assets, which are accounted for using the prospective method. Equity securities consist of non-redeemable preferred stocks, common stocks on which dividend income is partially tax-sheltered by the 50% corporate dividend received deduction, and private equity funds. Short-term investments include money market accounts, options, and short-term bonds that are highly rated short duration securities and redeemable within one year. In the normal course of investing activities, the Company either forms or enters into relationships with variable interest entities ("VIEs"). A VIE is an entity that either has investors that lack certain essential characteristics of a controlling financial interest, such as simple majority kick-out rights, or lacks sufficient funds to finance its own activities without financial support provided by other entities. The Company performs ongoing qualitative assessments of the VIEs to determine whether the Company has a controlling financial interest in the VIE and therefore is the primary beneficiary. The Company is deemed to have a controlling financial interest when it has both the ability to direct the activities that most significantly impact the economic performance of the VIE and the obligation to absorb losses or right to receive benefits from the VIE that could potentially be significant to the VIE. Based on the Company's assessment, if it determines it is the primary beneficiary, the Company consolidates the VIE in its consolidated financial statements. From time to time, the Company forms special purpose investment vehicles to facilitate its investment activities involving derivative instruments such as total return swaps, or limited partnerships such as private equity funds. These special purpose investment vehicles are consolidated VIEs as the Company has determined it is the primary beneficiary of such VIEs. Creditors have no recourse against the Company in the event of default by these VIEs. The Company had no implied or unfunded commitments to these VIEs at December 31, 2023 and 2022. The Company's financial or other support provided to these VIEs and its loss exposure are limited to its collateral and original investment.
Deferred Policy Acquisition Costs	Deferred policy acquisition costs consist of commissions paid to outside agents, premium taxes, salaries, and certain other underwriting costs that are incremental or directly related to the successful acquisition of new and renewal insurance contracts and are amortized over the life of the related policy in proportion to premiums earned. Deferred policy acquisition costs are limited to the amount that will remain after deducting from unearned premiums and anticipated investment income, the estimated losses and loss adjustment expenses, and the servicing costs that will be incurred as premiums are earned. The Company’s deferred policy acquisition costs are further limited by excluding those costs not directly related to the successful acquisition of insurance contracts.
Fixed Assets	Fixed assets are stated at historical cost less accumulated depreciation and amortization. A fixed asset classified as held for sale is measured at the lower of its carrying amount or fair value less cost to sell, and is presented separately from other fixed assets. The useful life for buildings is 40 years. Furniture, equipment, and purchased software are depreciated on a combination of straight-line and accelerated methods over 3 to 7 years. The Company has capitalized certain consulting costs, payroll, and payroll-related costs for employees related to computer software developed for internal use, which are amortized on a straight-line method over the estimated useful life of the software, generally not exceeding 7 years. In accordance with applicable accounting standards, capitalization ceases no later than the point at which a computer software project is substantially complete and ready for its intended use. Leasehold improvements are amortized over the shorter of the useful life of the assets or the life of the associated lease.
Goodwill And Other Intangible Assets and Capitalized Implementation Costs for Cloud Computing Arrangements	Goodwill and other intangible assets arise as a result of business acquisitions and consist of the excess of the cost of the acquisitions over the tangible and intangible assets acquired and liabilities assumed and identifiable intangible assets acquired. Identifiable intangible assets consist of the value of customer relationships, trade names, software and technology, and favorable leases, which are all subject to amortization, and an insurance license which is not subject to amortization.
Premium Revenue Recognition	Premium revenue is recognized on a pro-rata basis over the terms of the policies in proportion to the amount of insurance protection provided. Premium revenue includes installment and other fees for services which are recognized in the periods in which the services are rendered. Unearned premiums represent the portion of the written premium related to the unexpired policy term. Unearned premiums are predominantly computed monthly on a pro-rata basis and are stated gross of reinsurance deductions, with the reinsurance deduction recorded in other assets. The Company evaluates its unearned premiums periodically for premium deficiencies by comparing the sum of expected claim costs, unamortized acquisition costs and maintenance costs, partially offset by investment income, to related unearned premiums. To the extent that any of the Company’s lines of insurance business become unprofitable, a premium deficiency reserve may be required.
Losses And Loss Adjustment Expenses	Unpaid losses and loss adjustment expenses are determined in amounts estimated to cover incurred losses and loss adjustment expenses and established based upon the Company’s assessment of claims pending and the development of prior years’ loss liabilities. These amounts include liabilities based upon individual case estimates for reported losses and loss adjustment expenses and estimates of such amounts that are incurred but not reported. Changes in the estimated liability are charged or credited to operations as the losses and loss adjustment expenses are re-estimated. The liability is stated net of anticipated salvage and subrogation recoveries, and gross of reinsurance recoverables on unpaid losses. Estimating loss reserves is a difficult process as many factors can ultimately affect the final settlement of a claim and, therefore, the loss reserve that is required. A key assumption in estimating loss reserves is the degree to which the historical data used to analyze reserves will be predictive of ultimate claim costs on incurred claims. Changes in the regulatory and legal environments, results of litigation, medical costs, the cost of repair materials, and labor rates, among other factors, can impact this assumption. In addition, time can be a critical part of reserving determinations since the longer the span between the incidence of a loss and the payment or settlement of a claim, the more variable the ultimate settlement amount could be. Accordingly, short-tail claims, such as property damage claims, tend to be more reasonably predictable than long-tail liability claims, such as those involving the Company’s bodily injury ("BI") coverages. Management believes that the liability for losses and loss adjustment expenses is adequate to cover the ultimate net cost of losses and loss adjustment expenses incurred to date. However, since the provisions for loss reserves are necessarily based upon estimates, the ultimate liability may be more or less than such provisions. The Company analyzes loss reserves quarterly primarily using the incurred loss, paid loss, average severity coupled with the claim count development methods, and the generalized linear model ("GLM") described below. When deciding among methods to use, the Company evaluates the credibility of each method based on the maturity of the data available and the claims settlement practices for each particular line of insurance business or coverage within a line of insurance business. The Company may also evaluate qualitative factors such as known changes in laws or legal ruling that could affect claims handling or other external environmental factors or internal factors that could affect the settlement of claims. When establishing the loss reserve, the Company will generally analyze the results from all of the methods used rather than relying on a single method. While these methods are designed to determine the ultimate losses on claims under the Company’s policies, there is inherent uncertainty in all actuarial models since they use historical data to project outcomes. The Company believes that the techniques it uses provide a reasonable basis in estimating loss reserves. • The incurred loss method analyzes historical incurred case loss (case reserves plus paid losses) development to estimate ultimate losses. The Company applies development factors against current case incurred losses by accident period to calculate ultimate expected losses. The Company believes that the incurred loss method provides a reasonable basis for evaluating ultimate losses, particularly in the Company’s larger, more established lines of insurance business which have a long operating history. • The paid loss method analyzes historical payment patterns to estimate the amount of losses yet to be paid. • The average severity method analyzes historical loss payments and/or incurred losses divided by closed claims and/or total claims to calculate an estimated average cost per claim. From this, the expected ultimate average cost per claim can be estimated. The average severity method coupled with the claim count development method provides meaningful information regarding inflation and frequency trends that the Company believes is useful in establishing loss reserves. The claim count development method analyzes historical claim count development to estimate future incurred claim count development for current claims. The Company applies these development factors against current claim counts by accident period to calculate ultimate expected claim counts. • The GLM determines an average severity for each percentile of claims that have been closed as a percentage of estimated ultimate claims. The average severities are applied to open claims to estimate the amount of losses yet to be paid. The GLM utilizes operational time, determined as a percentile of claims closed rather than a finite calendar period, which neutralizes the effect of changes in the timing of claims handling.
Derivative Financial Instruments	The Company accounts for all derivative instruments, other than those that meet the normal purchases and sales exception, as either an asset or liability, measured at fair value, which is based on information obtained from independent parties. In addition, changes in fair value are recognized in earnings unless specific hedge accounting criteria are met.
Earnings (Loss) Per Share	Basic earnings (loss) per share excludes dilution and reflects net income (loss) divided by the weighted average shares of common stock outstanding during the periods presented. Diluted earnings (loss) per share is based on the weighted average shares of common stock and potential dilutive securities outstanding during the periods presented.
Income Taxes	Deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial reporting basis and the respective tax basis of the Company’s assets and liabilities, and expected benefits of utilizing net operating loss, capital loss, and tax-credit carryforwards. The Company assesses the likelihood that its deferred tax assets will be realized and, to the extent management does not believe these assets are more likely than not to be realized, a valuation allowance is established. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates or laws is recognized in earnings in the period that includes the enactment date. The Company’s deferred income taxes usually include a combination of ordinary and capital deferred tax benefits and expenses. At December 31, 2023, the Company’s deferred income taxes were in a net asset position mainly due to deferred tax assets generated by unearned premiums and loss reserve discounting. These deferred tax assets were substantially offset by deferred tax liabilities resulting from deferred policy acquisition costs. In assessing the Company's ability to realize deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized, and to the extent management does not believe these assets are more likely than not to be realized, a valuation allowance is established. The ultimate realization of deferred tax assets is dependent upon generating sufficient taxable income of the appropriate character within the carryback and carryforward periods available under the tax law. Management considers the reversal of deferred tax liabilities, projected future taxable income of an appropriate nature, and tax-planning strategies in making this assessment. Management’s recoverability assessment of the Company’s deferred tax assets which are ordinary in character takes into consideration the Company’s strong history of generating ordinary taxable income and a reasonable expectation that it will continue to generate ordinary taxable income in the future. The Company also has various deferred tax liabilities that represent sources of future ordinary taxable income. Management’s recoverability assessment with regard to its capital deferred tax assets is based on estimates of anticipated capital gains, tax-planning strategies available to generate future taxable capital gains, and the Company's capacity to absorb capital losses carried back to prior years, each of which would contribute to the realization of deferred tax benefits. The Company has significant unrealized gains in its investment portfolio that could be realized through asset dispositions, at management’s discretion. In addition, the Company expects to hold certain debt securities, which are currently in loss positions, to recovery or maturity. Management believes unrealized losses related to these debt securities, which represent a portion of the unrealized loss positions at December 31, 2023, are fully realizable at maturity. Management believes its long-term time horizon for holding these securities allows it to avoid any forced sales prior to maturity. Further, the Company has the capability to generate additional realized capital gains by entering into sale-leaseback transactions using one or more of its appreciated real estate holdings. The realized gains on the real estate holdings could be used to realize both ordinary and capital deferred tax assets. The Company also has the capacity to recoup capital deferred tax assets through tax capital loss carryback claims for taxes paid within permitted carryback periods. The Company has the capability to implement tax planning strategies and it has a steady history of generating positive cash flows from operations and believes that its liquidity needs can be met in future periods without the forced sale of its investments. This capability assists management in controlling the timing and amount of realized losses generated during future periods. By prudent utilization of some or all of these strategies, management has the intent and believes that it has the ability to generate capital gains and minimize tax losses in a manner sufficient to avoid losing the benefits of its deferred tax assets. Management will continue to assess the need for a valuation allowance on a quarterly basis. Although realization is not assured, management believes it is more likely than not that the Company’s deferred tax assets will be realized.
Contingent Liabilities	The Company has known, and may have unknown, potential liabilities which include claims, assessments, lawsuits, or regulatory fines and penalties relating to the Company’s business. The Company continually evaluates these potential liabilities and accrues for them and/or discloses them in the notes to the consolidated financial statements where required. In addition, the Company accrues for anticipated legal defense costs associated with lawsuits, claims or regulatory actions. The Company does not believe that the ultimate resolution of currently pending legal or regulatory proceedings, either individually or in the aggregate, will have a material adverse effect on its financial condition or cash flows. See Note 18. Commitments and Contingencies, for the required disclosures relating to contingent liabilities.
Reinsurance And Reinsurance Recoverables	Liabilities for unearned premiums and unpaid losses are stated in the accompanying consolidated financial statements before deductions for ceded reinsurance. Unpaid losses and unearned premiums that are ceded to reinsurers are carried in reinsurance recoverables and other assets, respectively, in the Company's consolidated balance sheets. Reinsurance recoverables on unpaid losses are estimated based upon assumptions consistent with those used in establishing the liabilities related to the underlying contracts. Most of the Company's reinsurance premiums are recognized ratably over the contract period to the extent coverage remains available. Net premiums earned and losses and loss adjustment expenses are stated net of deductions for ceded reinsurance. The Company is the assuming reinsurer under a Catastrophe Portfolio Participation Reinsurance Contract ("Contract") effective through December 31, 2025. The Company reimburses up to $30 million in losses for a proportional share of a portfolio of catastrophe losses under the Contract, to the extent the actual loss ratio exceeds the threshold loss ratio of 73.5%. The Company is party to a Catastrophe Reinsurance Treaty ("Treaty") covering a wide range of perils that is effective through June 30, 2024. The Treaty provides $1,111 million of coverage on a per occurrence basis after covered catastrophe losses exceed the $100 million Company retention limit. The Treaty specifically excludes coverage for any Florida business and for California earthquake losses on fixed property policies, such as homeowners, but does cover losses from fires following an earthquake. The Treaty provides for one full reinstatement of coverage limits with a minor exception at certain upper layers of coverage, and includes some additional minor territorial and coverage restrictions. The effect of reinsurance on property and casualty premiums written and earned was as follows: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Premiums Written Direct $ 4,531,942 $ 4,018,057 $ 3,877,476 Ceded (109,644) (81,256) (65,521) Assumed 15,353 10,743 13,361 Net $ 4,437,651 $ 3,947,544 $ 3,825,316 Premiums Earned Direct $ 4,339,333 $ 3,993,771 $ 3,764,626 Ceded (109,445) (80,950) (65,017) Assumed 15,481 10,821 13,301 Net $ 4,245,369 $ 3,923,642 $ 3,712,910 The Company recognized ceded premiums earned of approximately $109 million, $81 million, and $65 million in 2023, 2022, and 2021, respectively, which are included in net premiums earned in its consolidated statements of operations, and ceded losses and loss adjustment expenses of approximately $10 million, $(13) million, and $(10) million in 2023, 2022, and 2021, respectively, which are included in losses and loss adjustment expenses in its consolidated statements of operations. The negative ceded losses and loss adjustment expenses in each of 2022 and 2021 was primarily the result of favorable development on prior years' catastrophe losses that had previously been ceded to the Company's reinsurers. The Insurance Companies, as primary insurers, are required to pay losses to the extent reinsurers are unable to discharge their obligations under the reinsurance agreements. Reinsurance recoverables are balances due to the Company from its reinsurers for paid and unpaid losses and loss adjustment expenses. A credit exposure exists with respect to these balances to the extent that any reinsurer is unable to meet its obligations. The Company has established an allowance for uncollectible reinsurance recoverables related to credit risk, and changes in the allowance are presented as a component of losses and loss adjustment expenses in the Company's consolidated statements of operations. The Company reviews the allowance quarterly and adjusts it as necessary to reflect changes in estimates of uncollectible balances. The Company evaluates the financial condition of its reinsurers and monitors concentration risk to minimize its exposure to significant losses from individual reinsurers. The Company attempts to mitigate its credit risk related to reinsurance by entering into reinsurance arrangements with reinsurers that have high credit ratings and by obtaining collateral as necessary. The primary method of obtaining collateral is through letters of credit. Generally, the Company uses a default analysis to estimate uncollectible reinsurance recoverables. The primary components of the default analysis are reinsurance recoverable balances by reinsurer, net of collateral and any liabilities held by the Company subject to a right of offset, and future default factors used to estimate the probability that the reinsurer may be unable to meet its future obligations in full. The determination of the future default factor is based on a historical default factor published by a major rating agency applicable to the particular financial strength rating class. The following table presents a summary of changes in allowance for credit losses on reinsurance recoverables: Year Ended December 31, 2023 2022 2021 Beginning balance $ — $ — $ 91 Provision during the period for expected credit losses 12 — (91) Write-off amounts during the period — — — Recoveries during the period of amounts previously written off — — — Ending balance $ 12 $ — $ —
Share-Based Compensation	Share-based compensation expenses for all stock options granted or modified are based on their estimated grant-date fair values. The Company recognizes these compensation costs on a straight-line basis over the requisite service period of the award, which is the option vesting term of four years. The Company estimates forfeitures expected to occur in determining the amount of compensation cost to be recognized in each period. The fair value of stock option awards is estimated using the Black-Scholes option pricing model with the grant-date assumptions and weighted-average fair values. See Note 16. Share-Based Compensation for additional disclosures.
Revenue from Contract with Customer	The Company's revenue from contracts with customers that are in scope of Topic 606 represents the commission income that the Company's 100% owned insurance agencies, Auto Insurance Specialists LLC ("AIS") and PoliSeek AIS Insurance Solutions, Inc. ("Poliseek"), earned from third-party insurers. The Company's commission income from third-party insurers was approximately $20.8 million, $18.2 million and $20.2 million, with related expenses of approximately $11.4 million, $11.0 million and $12.8 million, for the years ended December 31, 2023, 2022 and 2021, respectively. Due to the immateriality of the Company's commission income and its related expenses to the overall consolidated financial statements, the commission income, net of related expenses, is included in other revenues in the Company's consolidated statements of operations, and in other income of the Property and Casualty business segment in the Company's segment reporting in accordance with Topic 280, Segment Reporting (see Note 19. Segment Information). AIS and PoliSeek are primarily engaged in the marketing and sales of insurance policies in private passenger automobile, commercial automobile and homeowners lines of business. Their revenues primarily consist of commission income received from property and casualty insurers. The primary performance obligation of AIS and Poliseek in return for the commission income from the insurers is to complete the sale of the policy and deliver the control of the policy to the insurer prior to the policy effective date. The total revenue from the sale of a policy is recognized when the sale is complete and the policy is effective as all the material aspects of the performance obligation are satisfied and the insurer is deemed to obtain control of the insurance policy at that time. The commission income is constrained such that the revenue is recognized only to the extent that the commission income received is not likely to be returned to the insurers due to policy cancellations. Any commission income not received when the sale is complete is recognized as commission income receivable, which is included in other receivables in the Company's consolidated balance sheets. Commission income receivable at December 31, 2023 and 2022 was approximately $1.6 million and $1.3 million, respectively.
Allowance for Credit Losses	Financial Instruments - Credit Losses (Topic 326) uses the "expected loss" methodology for recognizing credit losses for financial assets that are not accounted for at fair value through net income. The Company's investment portfolio, excluding accrued investment income, was not affected by Topic 326 as it applies the fair value option to all of its investments. The estimated allowance amounts for credit losses at December 31, 2023 and December 31, 2022 primarily related to premiums receivable. Premiums Receivable The majority of the Company's premiums receivable are short-term in nature and are due within a year, consistent with the policy term of its insurance policies sold. Generally, premiums are collected prior to providing risk coverage, minimizing the Company's exposure to credit risk. The Company monitors the credit risk associated with premiums receivable, taking into consideration the fact that credit risk is reduced by the Company's right to offset unearned premiums against premiums receivable. The Company has established an allowance for uncollectible premiums receivable related to credit risk, and the estimated allowance is reviewed quarterly and adjusted as appropriate based on evaluations of balances due from insureds, management’s experience, historical data, current economic conditions, and reasonable and supportable forecasts of future economic conditions that affect the collectibility of the reported amounts. In estimating an allowance for uncollectible premiums receivable, the Company assesses customer balances and write-offs by state, line of business, and the year the premiums were written. The estimated allowance is based on historical write-off percentages adjusted for the effects of current trends and reasonable and supportable forecasts, as well as expected recoveries of amounts written off. Evaluating the current trends or economic conditions that impact the Company's ability to collect premiums receivable and projecting those into the remaining life of premiums receivable in order to develop a reasonable and supportable forecast of the ultimate collectibility involve significant judgment and assumptions about future economic conditions. The Company monitors the overall credit risk of premiums receivable by regularly reviewing macroeconomic indicators such as trends in unemployment, inflation and interest rates, regulatory developments such as restrictions on cancellation of policies for nonpayment of premiums, and insurance policy specific indicators such as trends in policy cancellations. The following table presents a summary of changes in allowance for credit losses on premiums receivable: Year Ended December 31, 2023 2022 2021 Beginning balance $ 5,800 $ 6,000 $ 10,000 Provision during the period for expected credit losses 2,819 4,213 (893) Write-off amounts during the period (3,879) (5,027) (3,693) Recoveries during the period of amounts previously written off 560 614 586 Ending balance $ 5,300 $ 5,800 $ 6,000
Accrued Interest Receivables	The Company made certain accounting policy elections for its accrued interest receivables on the adoption date of Topic 326 as allowed: a) an election to present accrued interest receivable balances separately from the associated financial assets on the balance sheet, and b) an election not to measure an allowance for credit losses on accrued interest receivable amounts and instead write off uncollectible accrued interest amounts in a timely manner by reversing interest income. As a general policy, the Company writes off the accrued interest receivable balance when it receives a default notice or when the scheduled interest payment is not received, unless management determines that the default is temporary considering all of the relevant information. The Company believes that for the majority of its investment securities, writing off the uncollectible interest receivable balance within a year from the due date is considered timely. In all cases, the Company writes
Recently Issued Accounting Standards	Recently Issued Accounting Standards In December 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures." ASU 2023-09 is intended to enhance the transparency and decision usefulness of income tax disclosures. The amendments in ASU 2023-09 address investor requests for enhanced income tax information primarily through changes to the rate reconciliation and income taxes paid information. ASU 2023-09 will be effective for the Company in the annual period beginning January 1, 2025, though early adoption is permitted. The Company is evaluating the presentational effect that ASU 2023-09 will have on its consolidated financial statements and expects presentation changes to its note on income taxes. In November 2023, the FASB issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures." The amendments in ASU 2023-07 improve financial reporting by requiring disclosure of incremental segment information, including significant segment expenses, on an annual and interim basis for all public entities to enable investors to develop more useful financial analyses. Currently, Topic 280 requires that a public entity disclose certain information about its reportable segments. For example, a public entity is required to report a measure of segment profit or loss that the Chief Operating Decision Maker (“CODM”) uses to assess segment performance and make decisions about allocating resources. Topic 280 also requires other specified segment information, such as depreciation, amortization and depletion expense amounts, to be disclosed under certain circumstances. The amendments in ASU 2023-07 do not change or remove those disclosure requirements. The amendments in ASU 2023-07 also do not change how a public entity identifies its operating segments, aggregates those operating segments, or applies the quantitative thresholds to determine its reportable segments. The amendments in ASU 2023-07 are effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. A public entity should apply the amendments in ASU 2023-07 retrospectively to all prior periods presented in the financial statements. The Company is currently evaluating the impact of this ASU on its consolidated financial statements and related disclosures. In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848), Facilitation of the Effects of Reference Rate Reform on Financial Reporting." ASU 2020-04 provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The amendments in this ASU apply only to contracts, hedging relationships, and other transactions that reference LIBOR or other interbank offered rates expected to be discontinued because of reference rate reform. ASU 2020-04 was effective for all entities as of March 12, 2020 through December 31, 2022. In December 2022, the FASB issued ASU 2022-06, "Reference Rate Reform (Topic 848), Deferral of the Sunset Date of Topic 848," which defers the sunset date of Topic 848 from December 31, 2022 to December 31, 2024. The Company does not expect any material impact on its consolidated financial statements and related disclosures resulting from applying these ASUs.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Summary of Deferred Policy Acquisition Cost Amortization and Net Advertising Expense	The table below presents a summary of deferred policy acquisition cost amortization and net advertising expense: Year Ended December 31, 2023 2022 2021 (Amounts in millions) Deferred policy acquisition cost amortization $ 708.5 $ 654.6 $ 633.4 Net advertising expense 8.9 11.8 50.1
Effects of Reinsurance	The effect of reinsurance on property and casualty premiums written and earned was as follows: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Premiums Written Direct $ 4,531,942 $ 4,018,057 $ 3,877,476 Ceded (109,644) (81,256) (65,521) Assumed 15,353 10,743 13,361 Net $ 4,437,651 $ 3,947,544 $ 3,825,316 Premiums Earned Direct $ 4,339,333 $ 3,993,771 $ 3,764,626 Ceded (109,445) (80,950) (65,017) Assumed 15,481 10,821 13,301 Net $ 4,245,369 $ 3,923,642 $ 3,712,910
Premium Receivable, Allowance for Credit Loss	The following table presents a summary of changes in allowance for credit losses on premiums receivable: Year Ended December 31, 2023 2022 2021 Beginning balance $ 5,800 $ 6,000 $ 10,000 Provision during the period for expected credit losses 2,819 4,213 (893) Write-off amounts during the period (3,879) (5,027) (3,693) Recoveries during the period of amounts previously written off 560 614 586 Ending balance $ 5,300 $ 5,800 $ 6,000
Reinsurance Recoverable, Allowance for Credit Loss	The following table presents a summary of changes in allowance for credit losses on reinsurance recoverables: Year Ended December 31, 2023 2022 2021 Beginning balance $ — $ — $ 91 Provision during the period for expected credit losses 12 — (91) Write-off amounts during the period — — — Recoveries during the period of amounts previously written off — — — Ending balance $ 12 $ — $ —

Financial Instruments (Tables)

Financial Instruments (Tables)	12 Months Ended
Financial Instruments (Tables)	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Estimated Fair Values of Financial Instruments	The following table presents the fair values of financial instruments: December 31, 2023 2022 (Amounts in thousands) Assets Investments $ 5,228,520 $ 4,910,800 Note receivable 9,974 — Liabilities Options sold 1,955 162 Notes payable 557,710 375,631

Investments (Tables)

Investments (Tables)	12 Months Ended
Investments (Tables)	Dec. 31, 2023
Investments [Abstract]
Gains And Losses Due To Changes In Fair Value	The following table presents gains (losses) due to changes in fair value of investments that are measured at fair value pursuant to application of the fair value option: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Fixed maturity securities $ 62,833 $ (260,223) $ (39,649) Equity securities 45,046 (185,694) 107,701 Short-term investments 107 88 (141) Total gains (losses) $ 107,986 $ (445,829) $ 67,911
Gross Gains And Losses Realized On Sales Of Investments	The following table presents gross gains (losses) realized on the sales of investments: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Gross Gross Net Gross Gross Net Gross Gross Net Fixed maturity securities $ 1,783 $ (3,246) $ (1,463) $ 863 $ (71,425) $ (70,562) $ 2,306 $ (6,690) $ (4,384) Equity securities 76,844 (91,109) (14,265) 86,168 (61,252) 24,916 64,061 (18,826) 45,235 Short-term investments — (4) (4) 8 (2,500) (2,492) 236 (381) (145)
Estimated Fair Values Of Investments	The following table presents the estimated fair values of the Company's fixed maturity securities at December 31, 2023 by contractual maturity. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Estimated Fair Value (Amounts in thousands) Fixed maturity securities: Due in one year or less $ 306,970 Due after one year through five years 935,982 Due after five years through ten years 888,429 Due after ten years 2,187,955 Total $ 4,319,336
Investment Income	The following table presents a summary of net investment income: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Fixed maturity securities $ 173,167 $ 127,336 $ 100,001 Equity securities 44,223 43,495 35,064 Cash and Short-term investments 23,741 3,495 1,059 Total investment income $ 241,131 $ 174,326 $ 136,124 Less: investment expense (6,501) (5,970) (6,397) Net investment income $ 234,630 $ 168,356 $ 129,727

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
Fair Value Measurement (Tables)	Dec. 31, 2023
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]
Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Valuation Techniques	The following tables present information about the Company’s assets and liabilities measured at fair value on a recurring basis, and indicate the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair values: December 31, 2023 Level 1 Level 2 Level 3 Total (Amounts in thousands) Assets Fixed maturity securities: U.S. government bonds and agencies $ 123,182 $ 51,268 $ — $ 174,450 Municipal securities — 2,777,258 — 2,777,258 Mortgage-backed securities — 186,887 — 186,887 Corporate securities — 599,630 — 599,630 Collateralized loan obligations — 484,947 — 484,947 Other asset-backed securities — 96,164 — 96,164 Total fixed maturity securities 123,182 4,196,154 — 4,319,336 Equity securities: Common stock 597,888 — — 597,888 Non-redeemable preferred stock — 51,563 — 51,563 Private equity funds measured at net asset value (1) 81,242 Total equity securities 597,888 51,563 — 730,693 Short-term investments: Short-term bonds 12,015 1,838 — 13,853 Money market instruments 164,595 — — 164,595 Other 43 — — 43 Total short-term investments 176,653 1,838 — 178,491 Other assets: Note receivable — 9,974 — 9,974 Total assets at fair value $ 897,723 $ 4,259,529 $ — $ 5,238,494 Liabilities Other liabilities: Options sold 1,955 — — 1,955 Total liabilities at fair value $ 1,955 $ — $ — $ 1,955 December 31, 2022 Level 1 Level 2 Level 3 Total (Amounts in thousands) Assets Fixed maturity securities: U.S. government bonds $ 103,519 $ 55,088 $ — $ 158,607 Municipal securities — 2,737,183 — 2,737,183 Mortgage-backed securities — 166,260 — 166,260 Corporate securities — 569,553 — 569,553 Collateralized debt obligations — 320,252 — 320,252 Other asset-backed securities — 136,456 — 136,456 Total fixed maturity securities 103,519 3,984,792 — 4,088,311 Equity securities: Common stock 558,169 — — 558,169 Non-redeemable preferred stock — 51,236 — 51,236 Private equity funds measured at net asset value (1) 90,147 Total equity securities 558,169 51,236 — 699,552 Short-term investments: Short-term bonds 51,638 8,238 — 59,876 Money market instruments 63,021 — — 63,021 Other 40 — — 40 Total short-term investments 114,699 8,238 — 122,937 Total assets at fair value $ 776,387 $ 4,044,266 $ — $ 4,910,800 Liabilities Other liabilities: Options sold 162 — — 162 Total liabilities at fair value $ 162 $ — $ — $ 162 __________ (1) The fair value is measured using the NAV practical expedient; therefore, it is not categorized within the fair value hierarchy. The fair value amount is presented in this table to permit reconciliation of the fair value hierarchy to the amounts presented in the Company's consolidated balance sheets.
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	The following tables present the carrying value and fair value of the Company’s financial instruments disclosed, but not carried, at fair value, and the level within the fair value hierarchy at which such instruments are categorized: December 31, 2023 Carrying Value Fair Value Level 1 Level 2 Level 3 (Amounts in thousands) Liabilities Notes payable: Unsecured notes $ 373,729 $ 357,765 $ — $ 357,765 $ — Unsecured credit facility 200,000 199,945 — 199,945 — Total $ 573,729 $ 557,710 $ — $ 557,710 $ — December 31, 2022 Carrying Value Fair Value Level 1 Level 2 Level 3 (Amounts in thousands) Liabilities Notes payable: Unsecured notes $ 373,330 $ 350,644 $ — $ 350,644 $ — Unsecured credit facility 25,000 24,987 — 24,987 — Total $ 398,330 $ 375,631 $ — $ 375,631 $ —

Fixed Assets (Tables)

Fixed Assets (Tables)	12 Months Ended
Fixed Assets (Tables)	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Schedule Of Fixed Assets	The following table presents the components of fixed assets: December 31, 2023 2022 (Amounts in thousands) Land $ 9,713 $ 18,152 Buildings and improvements 65,408 105,526 Furniture and equipment 30,862 45,829 Capitalized software 344,654 314,092 Leasehold improvements 2,892 5,471 453,529 489,070 Less: accumulated depreciation and amortization (302,346) (317,628) Fixed assets, net $ 151,183 $ 171,442

Deferred Policy Acquisition C_2

Deferred Policy Acquisition Costs (Tables)	12 Months Ended
Deferred Policy Acquisition Costs (Tables)	Dec. 31, 2023
Deferred Policy Acquisition Costs Disclosures [Abstract]
Schedule Of Deferred Policy Acquisition Costs	Deferred policy acquisition costs were as follows: December 31, 2023 2022 2021 (Amounts in thousands) Balance, beginning of year $ 266,475 $ 258,259 $ 246,994 Policy acquisition costs deferred 735,894 662,828 644,650 Amortization (708,525) (654,612) (633,385) Balance, end of year $ 293,844 $ 266,475 $ 258,259

Leases (Tables)

Leases (Tables)	12 Months Ended
Leases (Tables)	Dec. 31, 2023
Leases [Abstract]
Lease, Cost	The components of lease cost along with its classification on the Company's consolidated statements of operations were as follows: Year Ended December 31, Lease Cost Classification 2023 2022 2021 (Amounts in thousands) Operating lease cost (1) Other operating expenses $ 11,674 $ 14,747 $ 15,846 Finance lease cost: Amortization of assets Other operating expenses 1,241 1,288 719 Interest on lease liabilities Interest expense 40 54 25 Variable lease cost (1) Other operating expenses 1,100 2,184 1,500 Sublease income (2) Other revenue (799) (492) (11) Net lease cost $ 13,256 $ 17,781 $ 18,079 __________ (1) Includes short-term leases, which are immaterial. (2) The Company subleased certain leased office space to third parties in 2023, 2022 and 2021. Weighted-average lease term and discount rate were as follows: December 31, 2023 2022 Weighted-average remaining lease term (in years): Operating leases 2.6 2.9 Finance leases 2.5 3.5 Weighted-average discount rate: Operating leases 4.37 % 2.84 % Finance leases 1.37 % 1.29 % Supplemental cash flow and other information related to leases was as follows: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 14,010 $ 15,815 $ 16,158 Operating cash flows from finance leases 41 54 25 Financing cash flows from finance leases 1,102 1,504 825 ROU assets obtained in exchange for lease liabilities: Operating leases 6,587 4,677 4,904 Finance leases — 1,951 1,115
Assets And Liabilities, Lease	on the Company's consolidated balance sheets were as follows: December 31, Lease Assets and Liabilities Classification 2023 2022 (Amounts in thousands) Operating lease assets Operating lease right-of-use assets $ 14,406 $ 20,183 Operating lease liabilities Operating lease liabilities 14,231 21,924 Finance lease assets Other assets 2,996 4,233 Finance lease liabilities Other liabilities 2,841 3,573
Lessee, Operating Lease, Liability, Maturity	Maturities of lease liabilities as of December 31, 2023 were as follows: Year Operating Leases Finance Leases (Amounts in thousands) 2024 $ 7,282 $ 1,449 2025 4,039 1,032 2026 2,351 405 2027 1,362 — 2028 243 — Total lease payments $ 15,277 $ 2,886 Less: Imputed interest 1,046 45 Total lease obligations $ 14,231 $ 2,841

Notes Payable (Tables)

Notes Payable (Tables)	12 Months Ended
Notes Payable (Tables)	Dec. 31, 2023
Notes Payable [Abstract]
Schedule of Long-term Debt Instruments	The following table presents information about the Company's notes payable: December 31, Lender Interest Rate Expiration 2023 2022 (Amounts in thousands) Senior unsecured notes (1) Publicly traded 4.40% March 15, 2027 $ 375,000 $ 375,000 Unsecured credit facility (2) Bank of America, Wells Fargo Bank, BMO Bank, and U.S. Bank Term SOFR plus 112.5-150.0 basis points November 16, 2026 200,000 25,000 Total principal amount 575,000 400,000 Less unamortized discount and debt issuance costs (3) 1,271 1,670 Total $ 573,729 $ 398,330 __________ (1) On March 8, 2017, the Company completed a public debt offering issuing $375 million of senior notes. The notes are unsecured senior obligations of the Company, with a 4.4% annual coupon payable on March 15 and September 15 of each year commencing September 15, 2017. These notes mature on March 15, 2027. The Company used the proceeds from the notes to pay off the total outstanding balance of $320 million under the existing loan and credit facility agreements and terminated the agreements on March 8, 2017. The remainder of the proceeds from the notes was used for general corporate purposes. The Company incurred debt issuance costs of approximately $3.4 million, inclusive of underwriters' fees. The notes were issued at a slight discount of 99.847% of par, resulting in the effective annualized interest rate, including debt issuance costs, of approximately 4.45%. (2) On March 31, 2021, the Company entered into an unsecured $75 million five-year revolving credit facility. On November 18, 2022, the Company entered into the First Amendment to this credit facility. The First Amendment extended the maturity date of the loan to November 16, 2026 from March 31, 2026 with possible further extension if certain conditions are met, increased the aggregate commitments by all the lenders to $200 million from $75 million, and replaced the LIBOR with the term SOFR. On November 30, 2023, the Company entered into the Second Amendment to this credit facility, which further increased the aggregate commitments by all the lenders to $250 million from $200 million. The interest rates on borrowings under the credit facility are based on the Company's debt to total capital ratio and range from Term SOFR plus 112.5 basis points when the ratio is under 20% to Term SOFR plus 150.0 basis points when the ratio is greater than or equal to 30%. Commitment fees for the undrawn portions of the credit facility range from 12.5 basis points when the ratio is under 20% to 22.5 basis points when the ratio is greater than or equal to 30%. The debt to total capital ratio is expressed as a percentage of (a) consolidated debt to (b) consolidated shareholders' equity plus consolidated debt. The Company's debt to total capital ratio was 27.1% at December 31, 2023, resulting in a 17.5 basis point commitment fee on any undrawn portion of the credit facility. As of February 13, 2024, a total of $200 million was drawn under this facility on a three-month revolving basis at an annual interest rate of approximately 6.84%, with $50 million available to be drawn. The Company contributed $150 million of the total amount drawn to the surplus of its consolidated insurance subsidiaries, and used the remainder for general corporate purposes. (3)
Schedule of Maturities of Long-term Debt	Debt maturities for each of the next five years and thereafter as of December 31, 2023 are as follows: Maturity Amounts (in thousands) 2024 $ — 2025 — 2026 200,000 2027 375,000 2028 — Thereafter — Total $ 575,000

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
Derivative Financial Instruments (Tables)	Dec. 31, 2023
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Summary Of Location And Amounts Of Derivative Fair Values In The Consolidated Balance Sheets	The following tables present the location and amounts of derivative fair values in the consolidated balance sheets and derivative gains in the consolidated statements of operations: Liability Derivatives December 31, 2023 December 31, 2022 (Amounts in thousands) Options sold - Other liabilities $ 1,955 $ 162 Total derivatives $ 1,955 $ 162
Schedule Of Derivative Gains And Losses In The Consolidated Statements Of Operations	Gains Recognized in Income Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Options sold - Net realized investment gains (losses) $ 8,586 $ 5,887 $ 3,045 Total $ 8,586 $ 5,887 $ 3,045

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
Goodwill and Other Intangible Assets (Tables)	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule Of Components Of Other Intangible Assets	The following table presents the components of other intangible assets: Gross Carrying Accumulated Net Carrying Useful Lives (Amounts in thousands) (in years) As of December 31, 2023 Customer relationships $ 54,862 $ (53,704) $ 1,158 11 Trade names 15,400 (9,625) 5,775 24 Technology 4,300 (4,300) — 10 Insurance license 1,400 — 1,400 Indefinite Total intangible assets, net $ 75,962 $ (67,629) $ 8,333 As of December 31, 2022 Customer relationships $ 54,862 $ (53,467) $ 1,395 11 Trade names 15,400 (8,983) 6,417 24 Technology 4,300 (4,300) — 10 Insurance license 1,400 — 1,400 Indefinite Total intangible assets, net $ 75,962 $ (66,750) $ 9,212
Schedule Of Estimated Future Amortization Expense Related To Intangible Assets	The following table presents the estimated future amortization expense related to other intangible assets as of December 31, 2023: Year Ending December 31, Amortization Expense (Amounts in thousands) 2024 $ 851 2025 807 2026 807 2027 807 2028 807 Thereafter 2,854 Total $ 6,933

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2023
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Components Of Income Tax Expense	The income tax expense (benefit) consisted of the following components: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Federal Current $ (3,840) $ (62,355) $ 37,391 Deferred 10,523 (93,562) 11,349 $ 6,683 $ (155,917) $ 48,740 State Current $ (2,958) $ 784 $ 1,542 Deferred (633) (2,910) 1,088 $ (3,591) $ (2,126) $ 2,630 Total Current $ (6,798) $ (61,571) $ 38,933 Deferred 9,890 (96,472) 12,437 Total $ 3,092 $ (158,043) $ 51,370
Reconciliation Of Income Taxes	The following table presents a reconciliation of the tax expense based on the statutory rate to the Company's actual tax expense in the consolidated statements of operations: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Computed tax expense (benefit) at 21% $ 20,880 $ (140,850) $ 62,854 Tax-exempt interest income (13,640) (11,864) (11,577) Dividends received deduction (1,237) (1,364) (1,311) State tax (benefit) expense (3,539) (1,597) 2,134 Nondeductible expenses 639 279 843 Other, net (11) (2,647) (1,573) Income tax expense (benefit) $ 3,092 $ (158,043) $ 51,370
Deferred Tax Assets And Liabilities	The following table presents the significant components of the Company’s net deferred tax assets and liabilities: December 31, 2023 2022 (Amounts in thousands) Deferred tax assets: 20% of net unearned premiums $ 75,394 $ 67,285 Discounting of loss reserves and salvage and subrogation recoverable for tax purposes 25,340 21,606 Expense accruals 11,262 11,578 Tax asset on net unrealized loss on securities carried at fair value 166 22,802 Other deferred tax assets 8,743 6,511 Total gross deferred tax assets 120,905 129,782 Deferred tax liabilities: Deferred policy acquisition costs (61,707) (55,960) Tax depreciation in excess of book depreciation (6,801) (11,029) Undistributed earnings of insurance subsidiaries (1,511) (1,898) Tax amortization in excess of book amortization (8,904) (7,466) Other deferred tax liabilities (8,969) (10,526) Total gross deferred tax liabilities (87,892) (86,879) Net deferred tax assets $ 33,013 $ 42,903
Summary Of Unrecognized Tax Benefits	The following table presents a reconciliation of the beginning and ending balances of unrecognized tax benefits: December 31, 2023 2022 (Amounts in thousands) Balance at January 1 $ 4,380 $ 4,380 Additions (reductions) based on tax positions related to: Current year — — Prior years (2,118) — Balance at December 31 $ 2,262 $ 4,380

Loss And Loss Adjustment Expe_2

Loss And Loss Adjustment Expense Reserves (Tables)	12 Months Ended
Loss And Loss Adjustment Expense Reserves (Tables)	Dec. 31, 2023
Insurance Loss Reserves [Abstract]
Activity In The Reserves For Losses And Loss Adjustment Expenses	The following table presents the activity in loss and loss adjustment expense reserves: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Gross reserves at January 1 $ 2,584,910 $ 2,226,430 $ 1,991,304 Reinsurance recoverables on unpaid losses (25,323) (41,379) (54,461) Net reserves at January 1 2,559,587 2,185,051 1,936,843 Incurred losses and loss adjustment expenses related to: Current year 3,553,801 3,314,938 2,786,246 Prior years (35,948) 47,281 (26,091) Total incurred losses and loss adjustment expenses 3,517,853 3,362,219 2,760,155 Loss and loss adjustment expense payments related to: Current year 2,080,690 1,862,006 1,601,998 Prior years 1,243,196 1,125,677 909,949 Total payments 3,323,886 2,987,683 2,511,947 Net reserves at December 31 2,753,554 2,559,587 2,185,051 Reinsurance recoverables on unpaid losses 32,148 25,323 41,379 Gross reserves at December 31 $ 2,785,702 $ 2,584,910 $ 2,226,430
Incurred and Paid Claims Development	The information about incurred and paid claims development for the years ended December 31, 2014 to 2022 is presented as unaudited supplementary information. Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance (Automobile Insurance) As of December 31, 2023 Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims Cumulative Number of Reported Claims Accident Year For the Years Ended December 31, 2014 (1) 2015 (1) 2016 (1) 2017 (1) 2018 (1) 2019 (1) 2020 (1) 2021 (1) 2022 (1) 2023 (Amounts in thousands) (Amounts in thousands) 2014 $ 1,467,175 $ 1,454,366 $ 1,473,545 $ 1,486,322 $ 1,498,504 $ 1,501,075 $ 1,501,713 $ 1,501,850 $ 1,502,161 $ 1,502,313 $ 58 180 2015 1,551,105 1,588,443 1,610,839 1,634,435 1,645,950 1,649,170 1,653,878 1,654,843 1,655,267 336 170 2016 1,672,853 1,669,642 1,713,696 1,731,997 1,732,410 1,740,807 1,743,417 1,745,513 2,544 155 2017 1,703,857 1,727,277 1,741,825 1,733,425 1,748,289 1,755,702 1,754,356 4,910 149 2018 1,781,817 1,773,502 1,785,071 1,806,240 1,807,297 1,811,302 12,992 147 2019 1,916,269 1,911,268 1,959,262 1,954,151 1,951,924 22,464 148 2020 1,514,551 1,448,083 1,452,343 1,430,973 36,124 91 2021 1,811,064 1,879,751 1,854,319 96,072 104 2022 2,255,032 2,264,193 238,987 116 2023 2,349,659 673,888 100 Total $ 18,319,819 __________ (1) The information for the years 2014 to 2022 is presented as unaudited supplemental information. Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance (Automobile Insurance) For the Years Ended December 31, Accident Year 2014 (1) 2015 (1) 2016 (1) 2017 (1) 2018 (1) 2019 (1) 2020 (1) 2021 (1) 2022 (1) 2023 (Amounts in thousands) 2014 $ 967,481 $ 1,231,413 $ 1,358,472 $ 1,432,472 $ 1,476,944 $ 1,490,366 $ 1,496,814 $ 1,500,243 $ 1,501,483 $ 1,502,305 2015 1,040,253 1,336,223 1,466,368 1,560,480 1,614,188 1,634,780 1,643,443 1,651,465 1,654,069 2016 1,094,006 1,395,199 1,554,217 1,656,192 1,699,069 1,722,293 1,736,697 1,740,902 2017 1,076,079 1,399,202 1,561,850 1,648,328 1,701,298 1,733,196 1,746,147 2018 1,082,127 1,417,637 1,588,049 1,697,228 1,757,923 1,784,876 2019 1,134,859 1,494,342 1,698,121 1,828,410 1,896,186 2020 825,398 1,089,096 1,242,000 1,328,686 2021 992,705 1,410,748 1,599,756 2022 1,237,725 1,743,364 2023 1,313,943 Total $ 16,310,234 All outstanding liabilities before 2014, net of reinsurance 10 Loss and allocated loss adjustment expense reserves, net of reinsurance $ 2,009,595 __________ (1) The information for the years 2014 to 2022 is presented as unaudited supplemental information. Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance (Homeowners Insurance) As of December 31, 2023 Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims Cumulative Number of Reported Claims Accident Year For the Years Ended December 31, 2014 (1) 2015 (1) 2016 (1) 2017 (1) 2018 (1) 2019 (1) 2020 (1) 2021 (1) 2022 (1) 2023 (Amounts in thousands) (Amounts in thousands) 2014 $ 199,298 $ 202,621 $ 203,218 $ 202,513 $ 204,986 $ 208,003 $ 208,743 $ 209,622 $ 209,071 $ 208,990 $ — 25 2015 234,800 234,881 233,501 236,855 238,652 239,941 240,927 237,872 237,994 150 24 2016 250,691 259,489 259,497 259,708 260,496 259,984 259,722 259,701 48 24 2017 309,491 295,163 288,322 289,869 289,294 291,360 290,909 227 30 2018 311,798 308,361 310,695 305,292 306,347 308,345 3,131 25 2019 359,643 366,139 361,421 360,609 360,140 1,278 30 2020 420,257 411,404 413,882 411,408 5,728 29 2021 510,724 511,311 504,086 11,687 31 2022 578,489 562,562 23,284 30 2023 717,988 147,258 39 Total $ 3,862,123 __________ (1) The information for the years 2014 to 2022 is presented as unaudited supplemental information. Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance (Homeowners Insurance) For the Years Ended December 31, Accident Year 2014 (1) 2015 (1) 2016 (1) 2017 (1) 2018 (1) 2019 (1) 2020 (1) 2021 (1) 2022 (1) 2023 (Amounts in thousands) 2014 $ 139,615 $ 186,996 $ 194,605 $ 198,758 $ 202,193 $ 203,333 $ 207,524 $ 207,801 $ 208,737 $ 208,866 2015 163,196 213,994 224,178 230,480 234,683 235,971 236,143 236,983 237,651 2016 173,537 234,215 245,878 253,919 256,642 258,477 259,045 259,875 2017 217,900 269,254 278,341 283,311 286,531 290,291 290,984 2018 213,038 271,534 286,658 294,099 300,742 303,053 2019 240,240 324,953 340,237 350,288 355,697 2020 271,208 365,910 386,297 395,412 2021 316,314 458,124 473,644 2022 339,242 501,075 2023 474,712 Total $ 3,500,969 All outstanding liabilities before 2014, net of reinsurance 1,044 Loss and allocated loss adjustment expense reserves, net of reinsurance $ 362,198 __________ (1) The information for the years 2014 to 2022 is presented as unaudited supplemental information.
Schedule of Historical Claims Duration	The following is unaudited supplementary information about average historical claims duration as of December 31, 2023. Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance Years 1 2 3 4 5 6 7 8 9 10 Automobile insurance 59.1 % 19.0 % 9.4 % 5.7 % 3.1 % 1.4 % 0.6 % 0.3 % 0.1 % 0.1 % Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance Years 1 2 3 4 5 6 7 8 9 10 Homeowners insurance 66.8 % 23.0 % 4.1 % 2.4 % 1.5 % 0.8 % 0.6 % 0.3 % 0.4 % 0.1 %
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Loss and Loss Adjustment Expense Reserves	The reconciliation of the net incurred and paid claims development tables to the liability for claims and claim adjustment expenses in the consolidated balance sheets is as follows: Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Loss and Loss Adjustment Expense Reserves December 31, 2023 (Amounts in thousands) Net outstanding liabilities Automobile insurance $ 2,009,595 Homeowners insurance 362,198 Other short-duration insurance lines 236,069 Loss and loss adjustment expense reserves, net of reinsurance recoverables on unpaid losses 2,607,862 Reinsurance recoverables on unpaid losses Automobile insurance 27,528 Homeowners insurance 3,903 Other short-duration insurance lines 717 Total reinsurance recoverables on unpaid losses 32,148 Insurance lines other than short-duration 1,072 Unallocated claims adjustment expenses 144,620 145,692 Total gross loss and loss adjustment expense reserves $ 2,785,702

Dividends (Tables)

Dividends (Tables)	12 Months Ended
Dividends (Tables)	Dec. 31, 2023
Dividends [Abstract]
Shareholder Dividends Paid	The following table presents shareholder dividends paid: Year Ended December 31, 2023 2022 2021 (Amounts in thousands, except per share data) Total paid $ 70,322 $ 105,482 $ 140,226 Per share paid $ 1.2700 $ 1.9050 $ 2.5325

Statutory Balances and Accoun_2

Statutory Balances and Accounting Practices (Tables)	12 Months Ended
Statutory Balances and Accounting Practices (Tables)	Dec. 31, 2023
Statutory Balances And Accounting Practices [Abstract]
Schedule Of Statutory Net Income And Capital And Surplus	The following table presents the statutory net income, and statutory capital and surplus of the Insurance Companies, as reported to regulatory authorities: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Statutory net (loss) income (1) $ (35,590) $ (184,292) $ 200,488 Statutory capital and surplus $ 1,667,187 $ 1,502,424 $ 1,827,210 __________ (1) Statutory net (loss) income reflects differences from GAAP net income (loss), including changes in the fair value of the investment portfolio as a result of the application of the fair value option.

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
Share-Based Compensation (Tables)	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Schedule of Cash Proceeds Received from Share-based Payment Awards	The following table presents a summary of cash received, compensation costs recognized and excess tax benefit, related to the Company's share-based awards: Year Ended December 31, 2023 2022 2021 (Amounts in thousands) Cash received from stock option exercises $ — $ — $ 215 Compensation cost, all share-based awards — 15 141 Excess tax benefit, all share-based awards — (1) (117)
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The following table provides the assumptions used in the calculation of grant-date fair values of these stock options based on the Black-Scholes option pricing model: Weighted-average grant-date fair value $ 8.09 Expected volatility 33.18 % Risk-free interest rate 2.62 % Expected dividend yield 5.40 % Expected term in months 72
Summary of Stock Option Activity	The following table presents a summary of the stock option activity for the year ended December 31, 2023: Shares Weighted-Average Weighted-Average Aggregate Outstanding at January 1, 2023 17,500 $ 43.01 Exercised — $ — Canceled or expired — $ — Outstanding at December 31, 2023 17,500 $ 43.01 4.1 $ — Exercisable at December 31, 2023 17,500 $ 43.01 4.1 $ —
Schedule of Options Authorized under Stock Option Plans, by Exercise Price Range	The following table presents information regarding stock options outstanding at December 31, 2023: Options Outstanding Options Exercisable Exercise Price Number of Weighted-Average Weighted- Number of Weighted- $43.01 17,500 4.1 $ 43.01 17,500 $ 43.01

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	12 Months Ended
Earnings (Loss) Per Share (Tables)	Dec. 31, 2023
Earnings Per Share Reconciliation [Abstract]
Reconciliation Of Numerators And Denominators Of Basic And Diluted Earnings Per Share	The following table presents a reconciliation of the numerators and denominators of the basic and diluted earnings (loss) per share calculations: Year Ended December 31, 2023 2022 2021 Net Income Weighted Average Per-Share Net Loss Weighted Average Per-Share Net Income Weighted Average Per-Share (Amounts and numbers in thousands, except per-share data) Basic EPS Income (loss) available to common stockholders $ 96,336 55,371 $ 1.74 $ (512,672) 55,371 $ (9.26) $ 247,937 55,368 $ 4.48 Effect of dilutive securities: Options — — — — — 6 Diluted EPS Income (loss) available to common stockholders after assumed conversions $ 96,336 55,371 $ 1.74 $ (512,672) 55,371 $ (9.26) $ 247,937 55,374 $ 4.48

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
Segment Information (Tables)	Dec. 31, 2023
Segment Reporting [Abstract]
Reconciliation of operating results by reportable segment	The following table presents operating results by reportable segment for the years ended: Year Ended December 31, 2023 2022 2021 Property & Casualty Other Total Property & Casualty Other Total Property & Casualty Other Total (Amounts in millions) Net premiums earned $ 4,245.4 $ 29.0 $ 4,274.4 $ 3,923.6 $ 28.9 $ 3,952.5 $ 3,712.9 $ 29.0 $ 3,741.9 Less: Losses and loss adjustment expenses 3,502.2 15.7 3,517.9 3,347.2 15.0 3,362.2 2,746.3 13.9 2,760.2 Underwriting expenses 973.4 14.7 988.1 922.1 12.3 934.4 902.6 14.1 916.7 Underwriting (loss) gain (230.2) (1.4) (231.6) (345.7) 1.6 (344.1) 64.0 1.0 65.0 Investment income 234.6 168.4 129.7 Net realized investment gains (losses) 101.0 (488.1) 111.7 Other income 19.6 10.3 10.0 Interest expense (24.2) (17.2) (17.1) Pre-tax income (loss) $ 99.4 $ (670.7) $ 299.3 Net income (loss) $ 96.3 $ (512.7) $ 247.9
Schedule direct premiums attributable to segment	The following table presents the Company’s net premiums earned and direct premiums written by line of insurance business for the years ended: Year Ended December 31, 2023 2022 2021 Property & Casualty Other Total Property & Casualty Other Total Property & Casualty Other Total (Amounts in millions) Private passenger automobile $ 2,796.1 $ — $ 2,796.1 $ 2,655.7 $ — $ 2,655.7 $ 2,613.5 $ — $ 2,613.5 Homeowners 957.7 — 957.7 830.6 — 830.6 698.1 — 698.1 Commercial automobile 303.9 — 303.9 267.9 — 267.9 258.6 — 258.6 Other 187.7 29.0 216.7 169.4 28.9 198.3 142.7 29.0 171.7 Net premiums earned $ 4,245.4 $ 29.0 $ 4,274.4 $ 3,923.6 $ 28.9 $ 3,952.5 $ 3,712.9 $ 29.0 $ 3,741.9 Private passenger automobile $ 2,841.8 $ — $ 2,841.8 $ 2,598.9 $ — $ 2,598.9 $ 2,640.7 $ — $ 2,640.7 Homeowners 1,119.0 — 1,119.0 940.3 — 940.3 801.5 — 801.5 Commercial automobile 346.2 — 346.2 276.8 — 276.8 259.9 — 259.9 Other 224.9 26.6 251.5 202.1 30.4 232.5 175.4 30.0 205.4 Direct premiums written $ 4,531.9 $ 26.6 $ 4,558.5 $ 4,018.1 $ 30.4 $ 4,048.5 $ 3,877.5 $ 30.0 $ 3,907.5

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 USD ($) State Subsidiary	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of insurance companies \| Subsidiary	12
Number of states in which company operates \| State	11
Percentage of direct premiums written as private passenger automobile lines of insurance	62%
Percentage of private passenger automobile premiums written in California	82%	82%	87%
Other comprehensive income (loss)	$ 0	$ 0	$ 0
Percentage of portfolio of unadjusted fair values obtained	98.40%
Percentage by which dividend income on non redeemable preferred stock, partnership, common stock is partially tax-sheltered	50%
Insurance companies security deposits	$ 15,000,000	14,000,000
Impairment charges	0	0	0
Goodwill impairment loss	0	0
Net premiums written	4,460,000,000	3,980,000,000	3,860,000,000
Reinsurance reimbursable amount	$ 30,000,000
Reinsurance retention policy, threshold loss ratio	73.50%
Reinsurance policy, coverage per occurrence after retention limit	$ 1,111,000,000
Reinsurance policy, retention limit	100,000,000
Ceded to other companies	(109,445,000)	(80,950,000)	(65,017,000)
Losses and loss adjustment expenses, assumed and ceded	$ 10,000,000	(13,000,000)	(10,000,000)
Vesting term	4 years
Revenue from contract with customer	$ 20,800,000	18,200,000	20,200,000
Cost of goods and services sold	11,400,000	11,000,000	12,800,000
Commission income receivable	1,600,000	1,300,000
Refund liability	1,000,000	800,000
Contract with customer, asset	0	0
Revenue, remaining performance obligation	0	0
Capitalized contract cost, net	200,000	1,100,000
Capitalized contract cost, accumulated amortization	(5,500,000)	(4,700,000)
Capitalized contract cost, amortization	$ 900,000	2,800,000	$ 3,900,000
Software
Summary Of Significant Accounting Policies [Line Items]
Useful life, in years	7 years
Maximum \| Building
Summary Of Significant Accounting Policies [Line Items]
Useful life, in years	40 years
Maximum \| Furniture Equipment And Purchase Software
Summary Of Significant Accounting Policies [Line Items]
Useful life, in years	7 years
Minimum \| Furniture Equipment And Purchase Software
Summary Of Significant Accounting Policies [Line Items]
Useful life, in years	3 years
Private Equity Funds
Summary Of Significant Accounting Policies [Line Items]
Unfunded commitments	$ 8,000,000	$ 9,000,000

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Summary of Deferred Policy Acquisition Cost Amortization and Net Advertising Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Deferred policy acquisition cost amortization	$ 708,525	$ 654,612	$ 633,385
Net advertising expense	$ 8,900	$ 11,800	$ 50,100

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Effects of Reinsurance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Premiums Written
Direct	$ 4,558,500	$ 4,048,500	$ 3,907,500
Net	4,460,000	3,980,000	3,860,000
Premiums Earned
Direct	4,368,342	4,022,611	3,793,664
Ceded	(109,445)	(80,950)	(65,017)
Assumed	15,481	10,821	13,301
Net	4,274,378	3,952,482	3,741,948
Property & Casualty
Premiums Written
Direct	4,531,942	4,018,057	3,877,476
Ceded	(109,644)	(81,256)	(65,521)
Assumed	15,353	10,743	13,361
Net	4,437,651	3,947,544	3,825,316
Premiums Earned
Direct	4,339,333	3,993,771	3,764,626
Ceded	(109,445)	(80,950)	(65,017)
Assumed	15,481	10,821	13,301
Net	$ 4,245,369	$ 3,923,642	$ 3,712,910

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Allowance for Credit Losses on Premium Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Premium Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 5,800	$ 6,000	$ 10,000
Provision during the period for expected credit losses	2,819	4,213	(893)
Write-off amounts during the period	(3,879)	(5,027)	(3,693)
Recoveries during the period of amounts previously written off	560	614	586
Ending balance	$ 5,300	$ 5,800	$ 6,000

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Allowance for Credit Losses on Reinsurance Recoverables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 0	$ 0	$ 91
Provision during the period for expected credit losses	12	0	(91)
Write-off amounts during the period	0	0	0
Recoveries during the period of amounts previously written off	0	0	0
Ending balance	$ 12	$ 0	$ 0

Financial Instruments - Estimat

Financial Instruments - Estimated Fair Values Of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets
Note receivable	$ 9,974	$ 0
Investments
Assets
Assets	5,228,520	4,910,800
Fair Value, Measurements, Recurring
Assets
Note receivable	9,974
Liabilities
Options sold	1,955	162
Notes payable	557,710	375,631
Fair Value, Measurements, Recurring \| Options sold
Liabilities
Options sold	$ 1,955	$ 162

Financial Instruments - Narrati

Financial Instruments - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Unsecured Notes Two \| Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Drawn down amount under credit facility	$ 200	$ 25
Unsecured notes \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, face amount	$ 375	$ 375

Investments - Gains (Losses) Du

Investments - Gains (Losses) Due To Changes In Fair Value Of Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fixed maturity securities
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Total gains (losses)	$ 62,833	$ (260,223)	$ (39,649)
Equity securities
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Total gains (losses)	45,046	(185,694)	107,701
Short-term investments
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Total gains (losses)	107	88	(141)
Investments
Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items]
Total gains (losses)	$ 107,986	$ (445,829)	$ 67,911

Investments - Gross Gains (Loss

Investments - Gross Gains (Losses) Realized On Sales Of Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fixed maturity securities
Gross Realized Gains	$ 1,783	$ 863	$ 2,306
Gross Realized Losses	(3,246)	(71,425)	(6,690)
Net	(1,463)	(70,562)	(4,384)
Equity securities
Gross Realized Gains	76,844	86,168	64,061
Gross Realized Losses	(91,109)	(61,252)	(18,826)
Net	(14,265)	24,916	45,235
Short-term investments
Gross Realized Gains	0	8	236
Gross Realized Losses	(4)	(2,500)	(381)
Net	$ (4)	$ (2,492)	$ (145)

Investments - Narrative (Detail

Investments - Narrative (Details)	12 Months Ended
Investments - Narrative (Details)	Dec. 31, 2023
External credit rating, non investment grade
Investments [Line Items]
Percentage of fixed maturities	0.40%

Investments - Estimated Fair Va

Investments - Estimated Fair Value Of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fixed maturity securities:
Due in one year or less	$ 306,970
Due after one year through five years	935,982
Due after five years through ten years	888,429
Due after ten years	2,187,955
Total	$ 4,319,336	$ 4,088,311

Investments - Investment Income

Investments - Investment Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments [Line Items]
Total investment income	$ 241,131	$ 174,326	$ 136,124
Less: investment expense	(6,501)	(5,970)	(6,397)
Net investment income	234,630	168,356	129,727
Fixed maturity securities
Investments [Line Items]
Total investment income	173,167	127,336	100,001
Equity securities
Investments [Line Items]
Total investment income	44,223	43,495	35,064
Short-term investments
Investments [Line Items]
Total investment income	$ 23,741	$ 3,495	$ 1,059

Fair Value Measurement - Narrat

Fair Value Measurement - Narrative (Details) - USD ($)	12 Months Ended
Fair Value Measurement - Narrative (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percentage of portfolio of unadjusted fair values obtained	98.40%
Three private equity funds using NAV	$ 79,200,000
Transfers between Levels 1, 2, and 3 of the fair value hierarchy	0	$ 0
Unsecured Notes Two \| Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Drawn down amount under credit facility	$ 200,000,000	25,000,000
Minimum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, liquidating investment, remaining period	1 year
Maximum
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, liquidating investment, remaining period	9 years
Venture Capital Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
One private equity fund using NAV	$ 2,000,000
Private Equity Funds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unfunded commitments	8,000,000	9,000,000
Level 2 \| Unsecured notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt instrument, face amount	375,000,000	375,000,000
Level 2 \| Commercial Mortgage Back Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt securities, trading, and equity securities, FV-NI	$ 33,000,000	$ 27,300,000

Fair Value Measurement - Schedu

Fair Value Measurement - Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis Valuation Techniques (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	$ 4,319,336	$ 4,088,311
Total equity securities	730,693	699,552
Note receivable	9,974	0
Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	4,319,336	4,088,311
Total equity securities	730,693	699,552
Total short-term investments	178,491	122,937
Note receivable	9,974
Total assets at fair value	5,238,494	4,910,800
Total liabilities at fair value	1,955	162
Fair Value, Measurements, Recurring \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	123,182	103,519
Total equity securities	597,888	558,169
Total short-term investments	176,653	114,699
Note receivable	0
Total assets at fair value	897,723	776,387
Total liabilities at fair value	1,955	162
Fair Value, Measurements, Recurring \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	4,196,154	3,984,792
Total equity securities	51,563	51,236
Total short-term investments	1,838	8,238
Note receivable	9,974
Total assets at fair value	4,259,529	4,044,266
Total liabilities at fair value	0	0
Fair Value, Measurements, Recurring \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Total equity securities	0	0
Total short-term investments	0	0
Note receivable	0
Total assets at fair value	0	0
Total liabilities at fair value	0	0
Fair Value, Measurements, Recurring \| U.S. government bonds and agencies
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	174,450	158,607
Fair Value, Measurements, Recurring \| U.S. government bonds and agencies \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	123,182	103,519
Fair Value, Measurements, Recurring \| U.S. government bonds and agencies \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	51,268	55,088
Fair Value, Measurements, Recurring \| U.S. government bonds and agencies \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Municipal securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	2,777,258	2,737,183
Fair Value, Measurements, Recurring \| Municipal securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Municipal securities \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	2,777,258	2,737,183
Fair Value, Measurements, Recurring \| Municipal securities \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Mortgage-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	186,887	166,260
Fair Value, Measurements, Recurring \| Mortgage-backed securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Mortgage-backed securities \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	186,887	166,260
Fair Value, Measurements, Recurring \| Mortgage-backed securities \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Corporate securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	599,630	569,553
Fair Value, Measurements, Recurring \| Corporate securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Corporate securities \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	599,630	569,553
Fair Value, Measurements, Recurring \| Corporate securities \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Collateralized loan obligations
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	484,947	320,252
Fair Value, Measurements, Recurring \| Collateralized loan obligations \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Collateralized loan obligations \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	484,947	320,252
Fair Value, Measurements, Recurring \| Collateralized loan obligations \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Other asset-backed securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	96,164	136,456
Fair Value, Measurements, Recurring \| Other asset-backed securities \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Other asset-backed securities \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	96,164	136,456
Fair Value, Measurements, Recurring \| Other asset-backed securities \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total fixed maturity securities	0	0
Fair Value, Measurements, Recurring \| Common stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total equity securities	597,888	558,169
Fair Value, Measurements, Recurring \| Common stock \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total equity securities	597,888	558,169
Fair Value, Measurements, Recurring \| Common stock \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total equity securities	0	0
Fair Value, Measurements, Recurring \| Common stock \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total equity securities	0	0
Fair Value, Measurements, Recurring \| Non-redeemable preferred stock
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total equity securities	51,563	51,236
Fair Value, Measurements, Recurring \| Non-redeemable preferred stock \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total equity securities	0	0
Fair Value, Measurements, Recurring \| Non-redeemable preferred stock \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total equity securities	51,563	51,236
Fair Value, Measurements, Recurring \| Non-redeemable preferred stock \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total equity securities	0	0
Fair Value, Measurements, Recurring \| Private equity funds measured at net asset value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total equity securities	81,242	90,147
Fair Value, Measurements, Recurring \| Short-term bonds
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	13,853	59,876
Fair Value, Measurements, Recurring \| Short-term bonds \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	12,015	51,638
Fair Value, Measurements, Recurring \| Short-term bonds \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	1,838	8,238
Fair Value, Measurements, Recurring \| Short-term bonds \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	0	0
Fair Value, Measurements, Recurring \| Money market instruments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	164,595	63,021
Fair Value, Measurements, Recurring \| Money market instruments \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	164,595	63,021
Fair Value, Measurements, Recurring \| Money market instruments \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	0	0
Fair Value, Measurements, Recurring \| Money market instruments \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	0	0
Fair Value, Measurements, Recurring \| Other
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	43	40
Fair Value, Measurements, Recurring \| Other \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	43	40
Fair Value, Measurements, Recurring \| Other \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	0	0
Fair Value, Measurements, Recurring \| Other \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total short-term investments	0	0
Fair Value, Measurements, Recurring \| Options sold
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Options sold	1,955	162
Fair Value, Measurements, Recurring \| Options sold \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Options sold	1,955	162
Fair Value, Measurements, Recurring \| Options sold \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Options sold	0	0
Fair Value, Measurements, Recurring \| Options sold \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Options sold	$ 0	$ 0

Fair Value Measurement - Financ

Fair Value Measurement - Financial Instruments Disclosed, But Not Carried, At Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, carrying value	$ 573,729	$ 398,330
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	557,710	375,631
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	0	0
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	557,710	375,631
Unsecured notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, carrying value	373,729	373,330
Unsecured notes \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	0	0
Unsecured notes \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	357,765	350,644
Unsecured notes \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	0	0
Unsecured notes \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	357,765	350,644
Line of Credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, carrying value	200,000	25,000
Line of Credit \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	0	0
Line of Credit \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	199,945	24,987
Line of Credit \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	0	0
Line of Credit \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes payable, fair value	$ 199,945	$ 24,987

Fixed Assets - Components Of Fi

Fixed Assets - Components Of Fixed Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 453,529	$ 489,070
Less: accumulated depreciation and amortization	(302,346)	(317,628)
Fixed assets, net	151,183	171,442
Land
Property, Plant and Equipment [Line Items]
Fixed assets, gross	9,713	18,152
Buildings and improvements
Property, Plant and Equipment [Line Items]
Fixed assets, gross	65,408	105,526
Furniture and equipment
Property, Plant and Equipment [Line Items]
Fixed assets, gross	30,862	45,829
Capitalized software
Property, Plant and Equipment [Line Items]
Fixed assets, gross	344,654	314,092
Leasehold improvements
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 2,892	$ 5,471

Fixed Assets - Narrative (Detai

Fixed Assets - Narrative (Details)			3 Months Ended	12 Months Ended
Fixed Assets - Narrative (Details)	May 31, 2023 USD ($) ft²	Mar. 31, 2023 USD ($) ft²	Mar. 31, 2023 USD ($) ft²	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Property, Plant and Equipment [Line Items]
Depreciation expense				$ 33,800,000	$ 34,300,000	$ 32,500,000
Net gains (losses) on sales of fixed assets				5,879,000	(86,000)	17,000
Sale price received in cash				29,876,000	3,000	$ 27,000
Promissory Note
Property, Plant and Equipment [Line Items]
Interest rate, stated percentage		7%	7%
Promissory note, term (in years)			4 years
Clearwater, Florida Office Building
Property, Plant and Equipment [Line Items]
Sale leaseback transaction, area of property leased back \| ft²		14,883	14,883
Sale leaseback transaction, percentage of property sold that has been leased back		9%
Sale leaseback transaction, lease term (in years)		5 years
Sale leaseback transaction, annual base rent		$ 400,000
Clearwater, Florida Office Building \| Disposal Group, Held-for-sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Property held for sale					20,200,000
Net gains (losses) on sales of fixed assets			$ (1,800,000)		$ (800,000)
Clearwater, Florida Office Building \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Sale price of fixed asset		19,600,000	19,600,000
Promissory note received from sale of fixed asset			9,800,000
Sale price received in cash			8,500,000
Rancho Cucamonga, California Office Building
Property, Plant and Equipment [Line Items]
Sale leaseback transaction, area of property leased back \| ft²	6,000
Sale leaseback transaction, percentage of property sold that has been leased back	5%
Sale leaseback transaction, lease term (in years)	2 years
Sale leaseback transaction, annual base rent	$ 200,000
Rancho Cucamonga, California Office Building \| Disposal Group, Held-for-sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Property held for sale		$ 13,600,000	$ 13,600,000
Rancho Cucamonga, California Office Building \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Net gains (losses) on sales of fixed assets				7,900,000
Sale price of fixed asset	$ 22,300,000
Sale price received in cash				21,400,000
Brea, California Office Building \| Disposal Group, Held-for-sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Property held for sale				$ 10,800,000

Deferred Policy Acquisition C_3

Deferred Policy Acquisition Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of year	$ 266,475	$ 258,259	$ 246,994
Policy acquisition costs deferred	735,894	662,828	644,650
Amortization	(708,525)	(654,612)	(633,385)
Balance, end of year	$ 293,844	$ 266,475	$ 258,259

Leases - Narrative (Details)

Leases - Narrative (Details) $ in Millions	Dec. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Lessee, operating lease, lease not yet commenced, amount	$ 3
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	1 year
Lessee, operating lease, lease not yet commenced, term of contract	4 years
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term	6 years
Lessee, operating lease, lease not yet commenced, term of contract	6 years

Leases - Lease Cost (Details)

Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
Leases - Lease Cost (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease cost	$ 11,674	$ 14,747	$ 15,846
Finance lease cost, amortization of assets	1,241	1,288	719
Finance lease cost, interest on lease liabilities	40	54	25
Variable lease cost	1,100	2,184	1,500
Sublease income	(799)	(492)	(11)
Net lease cost	$ 13,256	$ 17,781	$ 18,079

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease assets	$ 14,406	$ 20,183
Operating lease liabilities	$ 14,231	$ 21,924
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Finance lease assets	$ 2,996	$ 4,233
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Finance lease liabilities	$ 2,841	$ 3,573

Leases - Weighted Average Lease

Leases - Weighted Average Lease Term and Discount Rate (Details)	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease, weighted average remaining lease term	2 years 7 months 6 days	2 years 10 months 24 days
Financing lease, weighted average remaining lease term	2 years 6 months	3 years 6 months
Operating leases, weighted-average discount rate	4.37%	2.84%
Finance leases, weighted-average discount rate	1.37%	1.29%

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 14,010	$ 15,815	$ 16,158
Operating cash flows from finance leases	41	54	25
Financing cash flows from finance leases	1,102	1,504	825
ROU assets obtained in exchange for lease liabilities:
Operating leases	6,587	4,677	4,904
Finance leases	$ 0	$ 1,951	$ 1,115

Leases - Maturities of Operatin

Leases - Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Operating Leases
2024	$ 7,282
2025	4,039
2026	2,351
2027	1,362
2028	243
Total lease payments	15,277
Less: Imputed interest	1,046
Total lease obligations	14,231	$ 21,924
Finance Leases
2024	1,449
2025	1,032
2026	405
2027	0
2028	0
Total lease payments	2,886
Less: Imputed interest	45
Total lease obligations	$ 2,841	$ 3,573

Notes Payable - Schedule of Lon

Notes Payable - Schedule of Long-term Debt (Details)				12 Months Ended
Notes Payable - Schedule of Long-term Debt (Details)	Feb. 13, 2024 USD ($)	Nov. 30, 2023 USD ($)	Mar. 08, 2017 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Nov. 18, 2022 USD ($)	Mar. 31, 2021 USD ($)
Debt Instrument [Line Items]
Total principal amount				$ 575,000,000	$ 400,000,000
Less unamortized discount and debt issuance costs				1,271,000	1,670,000
Notes payable				573,729,000	398,330,000
Revolving Credit Facility
Debt Instrument [Line Items]
Repayments of debt			$ 320,000,000
Unsecured Notes Two \| Revolving Credit Facility
Debt Instrument [Line Items]
Loan maximum borrowing capacity		$ 250,000,000				$ 200,000,000	$ 75,000,000
Drawn down amount under credit facility				200,000,000	25,000,000
Unamortized debt issuance cost				800,000
Unsecured Notes Two \| Revolving Credit Facility \| Consolidated Insurance Subsidiary
Debt Instrument [Line Items]
Drawn down amount under credit facility contributed				150,000,000
Unsecured Notes Two \| Revolving Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Interest rate, effective percentage	6.84%
Drawn down amount under credit facility	$ 200,000,000
Undrawn portion of credit facility	$ 50,000,000
Unsecured notes
Debt Instrument [Line Items]
Notes payable				$ 373,729,000	373,330,000
Unsecured notes \| Notes payable \| Level 2 \| Unsecured Notes One
Debt Instrument [Line Items]
Interest rate, stated percentage			4.40%	4.40%
Unsecured debt			$ 375,000,000	$ 375,000,000	375,000,000
Debt issuance costs			$ 3,400,000
Discount percent			99.847%
Interest rate, effective percentage			4.45%
Unsecured notes \| Notes payable \| Level 2 \| Unsecured Notes Two
Debt Instrument [Line Items]
Unsecured debt				$ 200,000,000	$ 25,000,000
Minimum \| Unsecured Notes Two \| Revolving Credit Facility
Debt Instrument [Line Items]
Commitment fee on undrawn portion of facility		0.125%		0.175%
Maximum \| Unsecured Notes Two \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt to total capital ratio				0.271
Commitment fee on undrawn portion of facility		0.225%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum \| Unsecured Notes Two \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt to total capital ratio		0.30
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Minimum \| Unsecured notes \| Notes payable \| Level 2 \| Unsecured Notes Two
Debt Instrument [Line Items]
Basis spread on variable rate				1.125%
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum \| Unsecured Notes Two \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt to total capital ratio		0.20
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Maximum \| Unsecured notes \| Notes payable \| Level 2 \| Unsecured Notes Two
Debt Instrument [Line Items]
Basis spread on variable rate				1.50%

Notes Payable - Schedule of Mat

Notes Payable - Schedule of Maturities of Debt (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Long-Term Debt, Fiscal Year Maturity [Abstract]
2024	$ 0
2025	0
2026	200,000
2027	375,000
2028	0
Thereafter	0
Total	$ 575,000

Derivative Financial Instrume_3

Derivative Financial Instruments - Summary Of Location And Amounts Of Derivative Fair Values In The Consolidated Balance Sheets (Details) - Non-hedging derivatives - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Liability Derivatives	$ 1,955	$ 162
Option contracts \| Other liabilities
Derivative [Line Items]
Liability Derivatives	$ 1,955	$ 162

Derivative Financial Instrume_4

Derivative Financial Instruments - Schedule Of Derivative Gains And Losses In The Consolidated Statements Of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Net realized investment gains (losses)	Net realized investment gains (losses)	Net realized investment gains (losses)
Derivatives Not Designated as Hedging Instrument
Derivative [Line Items]
Gains Recognized in Income	$ 8,586	$ 5,887	$ 3,045
Derivatives Not Designated as Hedging Instrument \| Options sold
Derivative [Line Items]
Gains Recognized in Income	$ 8,586	$ 5,887	$ 3,045

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Change in goodwill	$ 0	$ 0
Goodwill, impaired, accumulated impairment loss	0	0
Goodwill impairment loss	0	0
Intangible assets amortization expense	$ 900,000	$ 1,000,000	$ 1,100,000

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Schedule Of Components Of Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 75,962	$ 75,962
Accumulated Amortization	(67,629)	(66,750)
Net Carrying Amount	8,333	9,212
Insurance license
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,400	1,400
Accumulated Amortization	0	0
Net Carrying Amount	1,400	1,400
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	54,862	54,862
Accumulated Amortization	(53,704)	(53,467)
Net Carrying Amount	$ 1,158	$ 1,395
Useful Lives (in years)	11 years	11 years
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 15,400	$ 15,400
Accumulated Amortization	(9,625)	(8,983)
Net Carrying Amount	$ 5,775	$ 6,417
Useful Lives (in years)	24 years	24 years
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,300	$ 4,300
Accumulated Amortization	(4,300)	(4,300)
Net Carrying Amount	$ 0	$ 0
Useful Lives (in years)	10 years	10 years

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Schedule Of Estimated Future Amortization Expense Related To Intangible Assets (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2024	$ 851
2025	807
2026	807
2027	807
2028	807
Thereafter	2,854
Total	$ 6,933

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Operating loss carryforwards	$ 19.7	$ 5.7
Operating loss carryforwards, subject to expiration	2.1
Operating loss carryforwards, not subject to expiration	17.6
Increase (decrease) in unrecognized tax benefits	(2.1)
Unrecognized tax benefits that would impact effective tax rate	3.9	6.6
Interest and penalty benefit	(1.2)
Interest and penalty expense		0.4	$ 0.3
Accrued interest and penalty	$ 2.5	$ 3.7

Income Taxes - Components Of In

Income Taxes - Components Of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Federal
Current	$ (3,840)	$ (62,355)	$ 37,391
Deferred	10,523	(93,562)	11,349
Total	6,683	(155,917)	48,740
State
Current	(2,958)	784	1,542
Deferred	(633)	(2,910)	1,088
Total	(3,591)	(2,126)	2,630
Current	(6,798)	(61,571)	38,933
Deferred	9,890	(96,472)	12,437
Income tax expense (benefit)	$ 3,092	$ (158,043)	$ 51,370

Income Taxes - Reconciliation O

Income Taxes - Reconciliation Of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Computed tax expense (benefit) at 21%	$ 20,880	$ (140,850)	$ 62,854
Tax-exempt interest income	(13,640)	(11,864)	(11,577)
Dividends received deduction	(1,237)	(1,364)	(1,311)
State tax (benefit) expense	(3,539)	(1,597)	2,134
Nondeductible expenses	639	279	843
Other, net	(11)	(2,647)	(1,573)
Income tax expense (benefit)	$ 3,092	$ (158,043)	$ 51,370

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
20% of net unearned premiums	$ 75,394	$ 67,285
Discounting of loss reserves and salvage and subrogation recoverable for tax purposes	25,340	21,606
Expense accruals	11,262	11,578
Tax asset on net unrealized loss on securities carried at fair value	166	22,802
Other deferred tax assets	8,743	6,511
Total gross deferred tax assets	120,905	129,782
Deferred tax liabilities:
Deferred policy acquisition costs	(61,707)	(55,960)
Tax depreciation in excess of book depreciation	(6,801)	(11,029)
Undistributed earnings of insurance subsidiaries	(1,511)	(1,898)
Tax amortization in excess of book amortization	(8,904)	(7,466)
Other deferred tax liabilities	(8,969)	(10,526)
Total gross deferred tax liabilities	(87,892)	(86,879)
Net deferred tax assets	$ 33,013	$ 42,903

Income Taxes - Summary Of Unrec

Income Taxes - Summary Of Unrecognized Tax Benefits - (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at January 1	$ 4,380	$ 4,380
Additions based on tax positions related to the current year	0	0
Decreases based on tax positions related to prior years	(2,118)	0
Balance at December 31	$ 2,262	$ 4,380

Loss And Loss Adjustment Expe_3

Loss And Loss Adjustment Expense Reserves - Activity In The Reserves For Losses And Loss Adjustment Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Gross reserves, beginning of period	$ 2,584,910	$ 2,226,430	$ 1,991,304
Reinsurance recoverables on unpaid losses, beginning of period	(25,323)	(41,379)	(54,461)
Net reserves, beginning of period	2,559,587	2,185,051	1,936,843
Incurred losses and loss adjustment expenses related to:
Current year	3,553,801	3,314,938	2,786,246
Prior years	(35,948)	47,281	(26,091)
Total incurred losses and loss adjustment expenses	3,517,853	3,362,219	2,760,155
Loss and loss adjustment expense payments related to:
Current year	2,080,690	1,862,006	1,601,998
Prior years	1,243,196	1,125,677	909,949
Total payments	3,323,886	2,987,683	2,511,947
Net reserves, end of period	2,753,554	2,559,587	2,185,051
Reinsurance recoverables on unpaid losses, end of period	32,148	25,323	41,379
Gross reserves, end of period	$ 2,785,702	$ 2,584,910	$ 2,226,430

Loss And Loss Adjustment Expe_4

Loss And Loss Adjustment Expense Reserves - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Unusual or Infrequent Item, or Both [Line Items]
Prior years	$ (35,948)	$ 47,281	$ (26,091)
Pre-tax catastrophe losses	239,000	102,000	104,000
Catastrophe
Unusual or Infrequent Item, or Both [Line Items]
Pre-tax catastrophe losses	247,000	101,000	109,000
Prior year claims and claim adjustment expense payments, favorable (unfavorable) outcome	$ 8,000	$ (1,000)	$ 5,000

Loss And Loss Adjustment Expe_5

Loss And Loss Adjustment Expense Reserves - Incurred and Paid Claims (Details) number_of_claims in Thousands, $ in Thousands	Dec. 31, 2023 USD ($) number_of_claims	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Claims Development [Line Items]
Net outstanding liabilities	$ 2,607,862
Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	18,319,819
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	16,310,234
All outstanding liabilities before 2014, net of reinsurance	10
Net outstanding liabilities	2,009,595
Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	3,862,123
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	3,500,969
All outstanding liabilities before 2014, net of reinsurance	1,044
Net outstanding liabilities	362,198
2014 \| Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	1,502,313	$ 1,502,161	$ 1,501,850	$ 1,501,713	$ 1,501,075	$ 1,498,504	$ 1,486,322	$ 1,473,545	$ 1,454,366	$ 1,467,175
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 58
Cumulative Number of Reported Claims \| number_of_claims	180
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,502,305	1,501,483	1,500,243	1,496,814	1,490,366	1,476,944	1,432,472	1,358,472	1,231,413	967,481
2014 \| Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	208,990	209,071	209,622	208,743	208,003	204,986	202,513	203,218	202,621	199,298
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 0
Cumulative Number of Reported Claims \| number_of_claims	25
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 208,866	208,737	207,801	207,524	203,333	202,193	198,758	194,605	186,996	$ 139,615
2015 \| Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	1,655,267	1,654,843	1,653,878	1,649,170	1,645,950	1,634,435	1,610,839	1,588,443	1,551,105
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 336
Cumulative Number of Reported Claims \| number_of_claims	170
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,654,069	1,651,465	1,643,443	1,634,780	1,614,188	1,560,480	1,466,368	1,336,223	1,040,253
2015 \| Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	237,994	237,872	240,927	239,941	238,652	236,855	233,501	234,881	234,800
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 150
Cumulative Number of Reported Claims \| number_of_claims	24
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 237,651	236,983	236,143	235,971	234,683	230,480	224,178	213,994	$ 163,196
2016 \| Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	1,745,513	1,743,417	1,740,807	1,732,410	1,731,997	1,713,696	1,669,642	1,672,853
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 2,544
Cumulative Number of Reported Claims \| number_of_claims	155
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,740,902	1,736,697	1,722,293	1,699,069	1,656,192	1,554,217	1,395,199	1,094,006
2016 \| Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	259,701	259,722	259,984	260,496	259,708	259,497	259,489	250,691
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 48
Cumulative Number of Reported Claims \| number_of_claims	24
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 259,875	259,045	258,477	256,642	253,919	245,878	234,215	$ 173,537
2017 \| Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	1,754,356	1,755,702	1,748,289	1,733,425	1,741,825	1,727,277	1,703,857
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 4,910
Cumulative Number of Reported Claims \| number_of_claims	149
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,746,147	1,733,196	1,701,298	1,648,328	1,561,850	1,399,202	1,076,079
2017 \| Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	290,909	291,360	289,294	289,869	288,322	295,163	309,491
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 227
Cumulative Number of Reported Claims \| number_of_claims	30
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 290,984	290,291	286,531	283,311	278,341	269,254	$ 217,900
2018 \| Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	1,811,302	1,807,297	1,806,240	1,785,071	1,773,502	1,781,817
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 12,992
Cumulative Number of Reported Claims \| number_of_claims	147
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,784,876	1,757,923	1,697,228	1,588,049	1,417,637	1,082,127
2018 \| Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	308,345	306,347	305,292	310,695	308,361	311,798
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 3,131
Cumulative Number of Reported Claims \| number_of_claims	25
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 303,053	300,742	294,099	286,658	271,534	$ 213,038
2019 \| Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	1,951,924	1,954,151	1,959,262	1,911,268	1,916,269
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 22,464
Cumulative Number of Reported Claims \| number_of_claims	148
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,896,186	1,828,410	1,698,121	1,494,342	1,134,859
2019 \| Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	360,140	360,609	361,421	366,139	359,643
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 1,278
Cumulative Number of Reported Claims \| number_of_claims	30
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 355,697	350,288	340,237	324,953	$ 240,240
2020 \| Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	1,430,973	1,452,343	1,448,083	1,514,551
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 36,124
Cumulative Number of Reported Claims \| number_of_claims	91
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,328,686	1,242,000	1,089,096	825,398
2020 \| Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	411,408	413,882	411,404	420,257
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 5,728
Cumulative Number of Reported Claims \| number_of_claims	29
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 395,412	386,297	365,910	$ 271,208
2021 \| Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	1,854,319	1,879,751	1,811,064
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 96,072
Cumulative Number of Reported Claims \| number_of_claims	104
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,599,756	1,410,748	992,705
2021 \| Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	504,086	511,311	510,724
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 11,687
Cumulative Number of Reported Claims \| number_of_claims	31
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 473,644	458,124	$ 316,314
2022 \| Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	2,264,193	2,255,032
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 238,987
Cumulative Number of Reported Claims \| number_of_claims	116
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,743,364	1,237,725
2022 \| Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	562,562	578,489
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 23,284
Cumulative Number of Reported Claims \| number_of_claims	30
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 501,075	$ 339,242
2023 \| Property insurance product line, automobile
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	2,349,659
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 673,888
Cumulative Number of Reported Claims \| number_of_claims	100
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 1,313,943
2023 \| Property insurance product line, homeowners'
Claims Development [Line Items]
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	717,988
Total of Incurred But Not Reported Liabilities Plus Expected Development on Reported Claims	$ 147,258
Cumulative Number of Reported Claims \| number_of_claims	39
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance	$ 474,712

Loss And Loss Adjustment Expe_6

Loss And Loss Adjustment Expense Reserves - Average Annual Percentage Payout of Incurred Claims by Age (Details)	Dec. 31, 2023
Property insurance product line, automobile
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Short-duration insurance contracts, historical claims duration, year one	59.10%
Short-duration insurance contracts, historical claims duration, year two	19%
Short-duration insurance contracts, historical claims duration, year three	9.40%
Short-duration insurance contracts, historical claims duration, year four	5.70%
Short-duration insurance contracts, historical claims duration, year five	3.10%
Short-duration insurance contracts, historical claims duration, year six	1.40%
Short-duration insurance contracts, historical claims duration, year seven	0.60%
Short-duration insurance contracts, historical claims duration, year eight	0.30%
Short-duration insurance contracts, historical claims duration, year nine	0.10%
Short-duration insurance contracts, historical claims duration, year ten	0.10%
Property insurance product line, homeowners'
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Short-duration insurance contracts, historical claims duration, year one	66.80%
Short-duration insurance contracts, historical claims duration, year two	23%
Short-duration insurance contracts, historical claims duration, year three	4.10%
Short-duration insurance contracts, historical claims duration, year four	2.40%
Short-duration insurance contracts, historical claims duration, year five	1.50%
Short-duration insurance contracts, historical claims duration, year six	0.80%
Short-duration insurance contracts, historical claims duration, year seven	0.60%
Short-duration insurance contracts, historical claims duration, year eight	0.30%
Short-duration insurance contracts, historical claims duration, year nine	0.40%
Short-duration insurance contracts, historical claims duration, year ten	0.10%

Loss And Loss Adjustment Expe_7

Loss And Loss Adjustment Expense Reserves - Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Loss and Loss Adjustment Expense Reserves (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Net outstanding liabilities	$ 2,607,862
Reinsurance recoverables on unpaid losses	32,148
Insurance lines other than short-duration	1,072
Unallocated claims adjustment expenses	144,620
Unallocated claims adjustment expenses, aggregate reconciling items	145,692
Total gross loss and loss adjustment expense reserves	2,785,702	$ 2,584,910	$ 2,226,430	$ 1,991,304
Property insurance product line, automobile
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Net outstanding liabilities	2,009,595
Reinsurance recoverables on unpaid losses	27,528
Property insurance product line, homeowners'
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Net outstanding liabilities	362,198
Reinsurance recoverables on unpaid losses	3,903
Other Short-duration Insurance Product Line
Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items]
Net outstanding liabilities	236,069
Reinsurance recoverables on unpaid losses	$ 717

Dividends - Dividends Paid In T

Dividends - Dividends Paid In Total And Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Dividends [Abstract]
Total paid	$ 70,322	$ 105,482	$ 140,226
Per share (in dollars per share)	$ 1.2700	$ 1.9050	$ 2.5325

Dividends - Narrative (Details)

Dividends - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Feb. 09, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Dividends Payable [Line Items]
Maximum dividend payable without prior permission of DOI of states domicile		$ 163
Proceeds from dividends received		$ 0	$ 0	$ 191
Subsequent Event
Dividends Payable [Line Items]
Quarterly dividend declared (in dollars per share)	$ 0.3175

Statutory Balances and Accoun_3

Statutory Balances and Accounting Practices - Schedule Of Statutory Net Income And Capital And Surplus (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Statutory Balances And Accounting Practices [Abstract]
Statutory net (loss) income	[1]	$ (35,590)	$ (184,292)	$ 200,488
Statutory capital and surplus		$ 1,667,187	$ 1,502,424	$ 1,827,210
RBC authorized control level		3.50	3.30	4
RBC threshold for regulatory or company action		200%

[1] Statutory net (loss) income reflects differences from GAAP net income (loss), including changes in the fair value of the investment portfolio as a result of the application of the fair value option.

Profit Sharing Plan and Annua_2

Profit Sharing Plan and Annual Cash Bonuses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred Compensation Arrangements [Abstract]
Maximum percentage of compensation employee is allowed to contribute	15%
Matching contributions	$ 11.1	$ 10.8	$ 10.4
Bonus expense, cash	$ 3.6	$ 9.1	$ 36.9

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details)	1 Months Ended		12 Months Ended
Share-Based Compensation - Narrative (Details)	Feb. 28, 2019 shares	Feb. 28, 2018 executive shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Feb. 28, 2015 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Canceled or expired, (in shares)			0
Vesting term			4 years
Intrinsic value of stock options exercised \| $			$ 0	$ 29,975	$ 1,007,175
Total fair value of stock options vested \| $			0	$ 141,584	$ 141,584
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)						4,900,000
Compensation expense not yet recognized \| $			$ 0
2015 Plan \| Common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance (in shares)			4,830,000
2015 Plan \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)		80,000
Canceled or expired, (in shares)	(10,000)
Number of executives \| executive		4
Vesting term			4 years
2005 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of stock option exercisable per year			25%
2005 Plan \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			10 years

Share-Based Compensation - Shar

Share-Based Compensation - Share-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Proceeds from stock options exercised	$ 0	$ 0	$ 215
Compensation cost, all share-based awards	0	15	141
Excess tax benefit, all share-based awards	$ 0	$ (1)	$ (117)

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Option Valuation Assumptions (Details) - Options	12 Months Ended
	Dec. 31, 2023 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value	$ 8.09
Expected volatility	33.18%
Risk-free interest rate	2.62%
Expected dividend yield	5.40%
Expected term	72 months

Share-Based Compensation - Summ

Share-Based Compensation - Summary Of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares shares
Shares
Outstanding Shares, Beginning balance (in shares) \| shares	17,500
Exercised, (in shares) \| shares	0
Canceled or expired, (in shares) \| shares	0
Outstanding Shares, Ending balance (in share) \| shares	17,500
Exercisable, (in shares) \| shares	17,500
Weighted-Average Exercise Price
Beginning balance (in dollars per share) \| $ / shares	$ 43.01
Exercised (in dollars per share) \| $ / shares	0
Canceled or Expired (in dollars per share) \| $ / shares	0
Ending balance (in dollars per share) \| $ / shares	43.01
Exercisable (in dollars per share) \| $ / shares	$ 43.01
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, Weighted-Average Remaining Contractual Term (Years)	4 years 1 month 6 days
Exercisable, Weighted-Average Remaining Contractual Term (Years)	4 years 1 month 6 days
Outstanding, Aggregate Intrinsic Value \| $	$ 0
Exercisable, Aggregate Intrinsic Value \| $	$ 0

Share-Based Compensation - St_2

Share-Based Compensation - Stock Option Awards (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options outstanding (in shares)	17,500	17,500
Options Outstanding, Weighted-Avg. Remaining Contractual Life (Years)	4 years 1 month 6 days
Options Outstanding, Weighted-Avg. Exercise Price (in dollars per share)	$ 43.01	$ 43.01
Number of options exercisable (in shares)	17,500
Options Exercisable, Weighted-Avg. Exercise Price (in dollars per share)	$ 43.01
43.01
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower limit (in dollars per share)	$ 43.01
Number of options outstanding (in shares)	17,500
Options Outstanding, Weighted-Avg. Remaining Contractual Life (Years)	4 years 1 month 6 days
Options Outstanding, Weighted-Avg. Exercise Price (in dollars per share)	$ 43.01
Number of options exercisable (in shares)	17,500
Options Exercisable, Weighted-Avg. Exercise Price (in dollars per share)	$ 43.01

Earnings (Loss) Per Share - Rec

Earnings (Loss) Per Share - Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net Income (Numerator)
Income available to common stockholders, Basic	$ 96,336	$ (512,672)	$ 247,937
Income available to common stockholders after assumed conversions, Diluted	$ 96,336	$ (512,672)	$ 247,937
Weighted Average Shares (Denominator)
Weighted shares, basic (in shares)	55,371	55,371	55,368
Weighted shares, diluted (in shares)	55,371	55,371	55,374
Per-Share Amount
Basic (in dollars per share)	$ 1.74	$ (9.26)	$ 4.48
Diluted (in dollars per share)	$ 1.74	$ (9.26)	$ 4.48
Options
Net Income (Numerator)
Effect of dilutive securities: Options	$ 0	$ 0	$ 0
Weighted Average Shares (Denominator)
Effect of dilutive securities: options (in shares)	0	0	6

Earnings (Loss) Per Share - Nar

Earnings (Loss) Per Share - Narrative (Details) - shares	12 Months Ended
Earnings (Loss) Per Share - Narrative (Details) - shares	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Line Items]
Incremental shares excluded from computation of diluted loss per share (in shares)		26
Common stock
Earnings Per Share [Line Items]
Potentially dilutive securities with anti-dilutive effect (in shares)	17,500	17,500	0

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands					6 Months Ended
	May 15, 2023	Apr. 30, 2023	Apr. 24, 2023	Nov. 21, 2022	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Exposure to earthquake loss		$ 85,600
Additional total refund requested to be provided to private automobile policyholders				$ 52,000
Reductions in premiums written, net					$ 128,000
Aggregate credit amount	$ 250		$ 25,000

Segment Information - Summary o

Segment Information - Summary of Operating Results by Segment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) State Subsidiary segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting [Abstract]
Number of insurance companies \| Subsidiary	12
Number of states in which company operates \| State	11
Number of reportable segments \| segment	1
Segment Reporting Information [Line Items]
Net premiums earned	$ 4,274,378	$ 3,952,482	$ 3,741,948
Losses and loss adjustment expenses	3,517,853	3,362,219	2,760,155
Underwriting expenses	988,100	934,400	916,700
Underwriting (loss) gain	(231,600)	(344,100)	65,000
Net investment income	234,630	168,356	129,727
Net realized investment gains (losses)	101,014	(488,080)	111,658
Other income	19,609	10,308	10,024
Interest expense	(24,169)	(17,232)	(17,113)
Income (loss) before income taxes	99,428	(670,715)	299,307
Net income (loss)	96,336	(512,672)	247,937
Property & Casualty
Segment Reporting Information [Line Items]
Net premiums earned	4,245,369	3,923,642	3,712,910
Losses and loss adjustment expenses	3,502,200	3,347,200	2,746,300
Underwriting expenses	973,400	922,100	902,600
Underwriting (loss) gain	(230,200)	(345,700)	64,000
Other
Segment Reporting Information [Line Items]
Net premiums earned	29,000	28,900	29,000
Losses and loss adjustment expenses	15,700	15,000	13,900
Underwriting expenses	14,700	12,300	14,100
Underwriting (loss) gain	$ (1,400)	$ 1,600	$ 1,000

Segment Information - Summary_2

Segment Information - Summary of Premiums Written and Earned by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net premiums earned	$ 4,274,378	$ 3,952,482	$ 3,741,948
Direct premiums written	4,558,500	4,048,500	3,907,500
Private passenger automobile
Segment Reporting Information [Line Items]
Net premiums earned	2,796,100	2,655,700	2,613,500
Direct premiums written	2,841,800	2,598,900	2,640,700
Homeowners
Segment Reporting Information [Line Items]
Net premiums earned	957,700	830,600	698,100
Direct premiums written	1,119,000	940,300	801,500
Commercial automobile
Segment Reporting Information [Line Items]
Net premiums earned	303,900	267,900	258,600
Direct premiums written	346,200	276,800	259,900
Other
Segment Reporting Information [Line Items]
Net premiums earned	216,700	198,300	171,700
Direct premiums written	251,500	232,500	205,400
Property & Casualty
Segment Reporting Information [Line Items]
Net premiums earned	4,245,369	3,923,642	3,712,910
Direct premiums written	4,531,942	4,018,057	3,877,476
Property & Casualty \| Private passenger automobile
Segment Reporting Information [Line Items]
Net premiums earned	2,796,100	2,655,700	2,613,500
Direct premiums written	2,841,800	2,598,900	2,640,700
Property & Casualty \| Homeowners
Segment Reporting Information [Line Items]
Net premiums earned	957,700	830,600	698,100
Direct premiums written	1,119,000	940,300	801,500
Property & Casualty \| Commercial automobile
Segment Reporting Information [Line Items]
Net premiums earned	303,900	267,900	258,600
Direct premiums written	346,200	276,800	259,900
Property & Casualty \| Other
Segment Reporting Information [Line Items]
Net premiums earned	187,700	169,400	142,700
Direct premiums written	224,900	202,100	175,400
Other
Segment Reporting Information [Line Items]
Net premiums earned	29,000	28,900	29,000
Direct premiums written	26,600	30,400	30,000
Other \| Private passenger automobile
Segment Reporting Information [Line Items]
Net premiums earned	0	0	0
Direct premiums written	0	0	0
Other \| Homeowners
Segment Reporting Information [Line Items]
Net premiums earned	0	0	0
Direct premiums written	0	0	0
Other \| Commercial automobile
Segment Reporting Information [Line Items]
Net premiums earned	0	0	0
Direct premiums written	0	0	0
Other \| Other
Segment Reporting Information [Line Items]
Net premiums earned	29,000	28,900	29,000
Direct premiums written	$ 26,600	$ 30,400	$ 30,000

Summary Of Investments Other _2

Summary Of Investments Other Than Investments In Related Parties (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	$ 5,229,297	$ 5,019,561
Fair Value	5,228,520	4,910,800
Amounts in the Balance Sheet	5,228,520	4,910,800
Fixed maturity securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	4,394,983	4,226,790
Fair Value	4,319,336	4,088,311
Amounts in the Balance Sheet	4,319,336	4,088,311
U.S. government bonds and agencies
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	174,903	159,256
Fair Value	174,450	158,607
Amounts in the Balance Sheet	174,450	158,607
Municipal securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	2,797,971	2,794,476
Fair Value	2,777,258	2,737,183
Amounts in the Balance Sheet	2,777,258	2,737,183
Mortgage-backed securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	201,727	184,936
Fair Value	186,887	166,260
Amounts in the Balance Sheet	186,887	166,260
Corporate securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	626,723	607,945
Fair Value	599,630	569,553
Amounts in the Balance Sheet	599,630	569,553
Collateralized loan obligations
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	486,984	332,859
Fair Value	484,947	320,252
Amounts in the Balance Sheet	484,947	320,252
Other asset-backed securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	106,675	147,318
Fair Value	96,164	136,456
Amounts in the Balance Sheet	96,164	136,456
Equity securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	654,939	668,843
Fair Value	730,693	699,552
Amounts in the Balance Sheet	730,693	699,552
Common stock
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	497,543	463,940
Fair Value	597,888	558,169
Amounts in the Balance Sheet	597,888	558,169
Non-redeemable preferred stock
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	64,860	64,686
Fair Value	51,563	51,236
Amounts in the Balance Sheet	51,563	51,236
Private equity funds measured at net asset value
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	92,536	140,217
Fair Value	81,242	90,147
Amounts in the Balance Sheet	81,242	90,147
Short-term investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost	179,375	123,928
Fair Value	178,491	122,937
Amounts in the Balance Sheet	$ 178,491	$ 122,937

Condensed Financial Informati_2

Condensed Financial Information of Registrant (Schedule Of Condensed Financial Information Of Registrant, Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments [Abstract]
Fixed maturity securities (amortized cost $4,394,983; $4,226,790)	$ 4,319,336	$ 4,088,311
Equity securities (cost $17,227; $35,041)	730,693	699,552
Short-term investments (cost $571; $27,057)	178,491	122,937
Total investments	5,228,520	4,910,800
Cash	550,903	289,776
Accrued investment income	59,128	52,474
Current income taxes	4,081	55,136
Deferred income taxes	33,013	42,903
Other assets	57,915	49,628
Total assets	7,103,397	6,514,188
Liabilities
Notes payable	573,729	398,330
Other liabilities	270,711	289,568
Total liabilities	5,555,252	4,992,057
Commitments and contingencies
Shareholders’ equity:
Common stock	98,947	98,947
Retained earnings	1,449,198	1,423,184
Total shareholders’ equity	1,548,145	1,522,131	$ 2,140,281
Total liabilities and shareholders’ equity	7,103,397	6,514,188
Amortized cost on fixed maturities trading investments	4,394,983	4,226,790
Cost - equity security trading investments	654,939	668,843
Cost - short-term investments	179,375	123,928
Parent Company
Investments [Abstract]
Fixed maturity securities (amortized cost $4,394,983; $4,226,790)	9,949	10,907
Equity securities (cost $17,227; $35,041)	28,027	51,416
Short-term investments (cost $571; $27,057)	571	27,059
Investment in subsidiaries	2,084,346	1,833,372
Total investments	2,122,893	1,922,754
Cash	4,698	6,218
Accrued investment income	141	149
Current income taxes	5,148	55,777
Deferred income taxes	1,544	1,072
Other assets	1,499	1,493
Total assets	2,151,587	2,000,844
Liabilities
Other liabilities	5,751	5,214
Total liabilities	603,442	478,713
Commitments and contingencies
Shareholders’ equity:
Common stock	98,947	98,947
Retained earnings	1,449,198	1,423,184
Total shareholders’ equity	1,548,145	1,522,131
Total liabilities and shareholders’ equity	2,151,587	2,000,844
Amortized cost on fixed maturities trading investments	9,979	10,908
Cost - equity security trading investments	17,227	35,041
Cost - short-term investments	571	27,057
Parent Company \| Affiliated Entity
Investments [Abstract]
Amounts receivable	503	516
Income tax receivable	15,161	12,865
Liabilities
Notes payable	2,753	90
Income tax payable	21,209	75,079
Parent Company \| Nonrelated Party
Liabilities
Notes payable	$ 573,729	$ 398,330

Condensed Financial Informati_3

Condensed Financial Information of Registrant (Schedule Of Condensed Financial Information Of Registrant, Statements Of Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Net investment income	$ 234,630	$ 168,356	$ 129,727
Net realized investment gains (losses)	101,014	(488,080)	111,658
Total revenues	4,629,631	3,643,066	3,993,357
Expenses:
Other operating expenses	279,656	279,718	283,397
Interest	24,169	17,232	17,113
Total expenses	4,530,203	4,313,781	3,694,050
Income tax (benefit) expense	3,092	(158,043)	51,370
Net income (loss)	96,336	(512,672)	247,937
Parent Company
Revenues:
Net investment income	2,998	2,696	2,560
Net realized investment gains (losses)	1,431	(12,969)	26,523
Total revenues	4,429	(10,273)	29,083
Expenses:
Other operating expenses	2,526	2,446	2,627
Interest	24,129	17,178	17,088
Total expenses	26,655	19,624	19,715
(Loss) income before income taxes and equity in net income (loss) of subsidiaries	(22,226)	(29,897)	9,368
Income tax (benefit) expense	(4,379)	(10,234)	4,930
(Loss) income before equity in net income (loss) of subsidiaries	(17,847)	(19,663)	4,438
Equity in net income (loss) of subsidiaries	114,183	(493,009)	243,499
Net income (loss)	$ 96,336	$ (512,672)	$ 247,937

Condensed Financial Informati_4

Condensed Financial Information of Registrant (Schedule Of Condensed Financial Information Of Registrant, Statements Of Cash Flow) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net cash provided by operating activities	$ 452,988,000	$ 352,589,000	$ 501,584,000
Cash flows from investing activities:
Capital distribution from subsidiaries	6,200,000	2,900,000	5,200,000
Fixed maturity securities available for sale in nature:
Purchases	(784,752,000)	(1,794,817,000)	(1,460,641,000)
Sales	276,805,000	856,291,000	336,201,000
Calls or maturities	294,309,000	480,023,000	518,557,000
Equity securities available for sale in nature:
Purchases	(1,356,493,000)	(1,042,913,000)	(958,008,000)
Sales	1,356,132,000	1,154,523,000	943,857,000
Other, net	10,377,000	5,749,000	9,069,000
Net cash (used in) provided by investing activities	(295,437,000)	(316,384,000)	(373,670,000)
Cash flows from financing activities:
Dividends paid to shareholders	(70,322,000)	(105,482,000)	(140,226,000)
Proceeds from stock options exercised	0	0	215,000
Proceeds from bank loan	175,000,000	25,000,000	0
Net cash provided by (used in) financing activities	103,576,000	(81,986,000)	(140,836,000)
Net (decrease) increase in cash	261,127,000	(45,781,000)	(12,922,000)
Cash:
Beginning of year	289,776,000	335,557,000	348,479,000
End of year	550,903,000	289,776,000	335,557,000
SUPPLEMENTAL CASH FLOW DISCLOSURE
Interest paid	23,000,000	16,665,000	16,616,000
Income taxes paid (refunded), net	(57,853,000)	(26,542,000)	69,467,000
Parent Company
Cash flows from operating activities:
Net cash provided by operating activities	(14,703,000)	225,000	(36,662,000)
Cash flows from investing activities:
Capital contribution to subsidiaries	(150,000,000)	0	0
Capital distribution from subsidiaries	0	3,431,433	0
Distributions received from special purpose entities	6,210,000	2,904,000	5,199,000
Dividends received from subsidiaries	0	0	191,000,000
Fixed maturity securities available for sale in nature:
Purchases	0	(11,905,000)	0
Sales	0	1,000,000	0
Calls or maturities	955,000	0	0
Equity securities available for sale in nature:
Purchases	(1,172,000)	(5,307,000)	(13,151,000)
Sales	25,848,000	48,215,000	38,092,000
Decrease (increase) in short-term investments	26,481,000	(6,268,000)	(16,172,000)
Other, net	183,000	667,000	791,000
Net cash (used in) provided by investing activities	(91,495,000)	32,737,000	205,759,000
Cash flows from financing activities:
Dividends paid to shareholders	(70,322,000)	(105,482,000)	(140,226,000)
Proceeds from stock options exercised	0	0	215,000
Proceeds from bank loan	175,000,000	25,000,000	0
Net cash provided by (used in) financing activities	104,678,000	(80,482,000)	(140,011,000)
Net (decrease) increase in cash	(1,520,000)	(47,520,000)	29,086,000
Cash:
Beginning of year	6,218,000	53,738,000	24,652,000
End of year	4,698,000	6,218,000	53,738,000
SUPPLEMENTAL CASH FLOW DISCLOSURE
Interest paid	22,959,000	16,611,000	16,590,000
Income taxes paid (refunded), net	$ 1,630,000	$ (14,102,000)	$ 18,841,000

Condensed Financial Informati_5

Condensed Financial Information of Registrant Condensed Financial Information of Registrant (Narratives) (Details)				12 Months Ended
	Feb. 13, 2024 USD ($)	Nov. 30, 2023 USD ($)	Mar. 08, 2017 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Nov. 18, 2022 USD ($)	Mar. 31, 2021 USD ($)
Condensed Financial Statements, Captions [Line Items]
Capital distribution from subsidiaries				$ 6,200,000	$ 2,900,000	$ 5,200,000
Proceeds from dividends received				0	0	191,000,000
Revolving Credit Facility
Condensed Financial Statements, Captions [Line Items]
Repayments of debt			$ 320,000,000
Revolving Credit Facility \| Unsecured Notes Two
Condensed Financial Statements, Captions [Line Items]
Loan maximum borrowing capacity		$ 250,000,000					$ 200,000,000	$ 75,000,000
Drawn down amount under credit facility				200,000,000	25,000,000
Revolving Credit Facility \| Unsecured Notes Two \| Consolidated Insurance Subsidiary
Condensed Financial Statements, Captions [Line Items]
Drawn down amount under credit facility contributed				150,000,000
Revolving Credit Facility \| Unsecured Notes Two \| Subsequent Event
Condensed Financial Statements, Captions [Line Items]
Interest rate, effective percentage	6.84%
Drawn down amount under credit facility	$ 200,000,000
Undrawn portion of credit facility	$ 50,000,000
Unsecured notes \| Unsecured Notes One \| Notes payable \| Level 2
Condensed Financial Statements, Captions [Line Items]
Unsecured debt			$ 375,000,000	$ 375,000,000	375,000,000
Interest rate, stated percentage			4.40%	4.40%
Debt issuance costs			$ 3,400,000
Discount percent			99.847%
Interest rate, effective percentage			4.45%
Unsecured notes \| Unsecured Notes Two \| Notes payable \| Level 2
Condensed Financial Statements, Captions [Line Items]
Unsecured debt				$ 200,000,000	25,000,000
Minimum \| Revolving Credit Facility \| Unsecured Notes Two
Condensed Financial Statements, Captions [Line Items]
Commitment fee on undrawn portion of facility		0.125%		0.175%
Minimum \| Revolving Credit Facility \| Unsecured Notes Two \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Condensed Financial Statements, Captions [Line Items]
Debt to total capital ratio		0.30
Minimum \| Unsecured notes \| Unsecured Notes Two \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Notes payable \| Level 2
Condensed Financial Statements, Captions [Line Items]
Basis spread on variable rate				1.125%
Maximum \| Revolving Credit Facility \| Unsecured Notes Two
Condensed Financial Statements, Captions [Line Items]
Debt to total capital ratio				0.271
Commitment fee on undrawn portion of facility		0.225%
Maximum \| Revolving Credit Facility \| Unsecured Notes Two \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Condensed Financial Statements, Captions [Line Items]
Debt to total capital ratio		0.20
Maximum \| Unsecured notes \| Unsecured Notes Two \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate \| Notes payable \| Level 2
Condensed Financial Statements, Captions [Line Items]
Basis spread on variable rate				1.50%
Parent Company
Condensed Financial Statements, Captions [Line Items]
Capital distribution from subsidiaries				$ 0	3,431,433	0
Payments for contributions to subsidiaries				$ 150,000,000	$ 0	$ 0

Supplemental Reinsurance Prem_2

Supplemental Reinsurance Premiums (Schedule of Property and Liability Insurance Earned Premiums) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]
Direct amounts	$ 4,368,342	$ 4,022,611	$ 3,793,664
Ceded to other companies	(109,445)	(80,950)	(65,017)
Assumed	15,481	10,821	13,301
Net premiums earned	$ 4,274,378	$ 3,952,482	$ 3,741,948