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.