Document and Entity Information Document Information [Table] Document Information [Line Items] Document and Entity Information Document Type Document Quarterly Report Document Period End Date Document Transition Report Securities Act File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Central Index Key Amendment Flag Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Consolidated Balance Sheets Assets [Abstract] Assets Debt Securities, Available-for-Sale [Abstract] Investments: Fixed Maturity Securities Debt Securities, Available-for-Sale, Excluding Accrued Interest Fixed maturities, available for sale, at fair value (amortized cost: $1,365,368 and $1,337,235, allowance for expected credit losses of $355 and $0) Totals, Estimated Fair Value Fixed maturity securities, Estimated Fair Value Equity Securities, FV-NI, Current Equity securities, at fair value (cost: $189,372 and $201,591) Equity securities, Estimated Fair Value Equity Method Investments Other invested assets Investments Total investments Cash and Cash Equivalent Cash and cash equivalents Accounts Receivable, Excluding Accrued Interest, after Allowance for Credit Loss, Noncurrent Balance, end of period Balance, beginning of period Accounts receivable, net of allowance for expected credit losses of $890 and $802 Amount receivable for securities sold either not included in the normal course of business (as would be the case with receivables included in accounts receivable, net) and/or gross amount due. Receivable For Securities Sold Receivable for securities sold Amount receivable for interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments, not included in the normal course of business (as would be the case with receivables included in accounts receivable, net) and/or gross amount due. Accrued Investment Income Receivables Accrued investment income Income Taxes Receivable Taxes recoverable Reinsurance Recoverable for Paid Claims and Claims Adjustments Receivable from reinsurers related to paid loss and loss adjustment expenses Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Receivable from reinsurers related to unpaid loss and loss adjustment expenses Plus receivable from reinsurers related to unpaid losses and LAE Prepaid Reinsurance Premiums Ceded unearned premiums Deferred Policy Acquisition Cost Deferred policy acquisition costs Deferred Income Tax Assets, Net Deferred income taxes Equities and deposits in pools and associations relates to equity interests in, or deposits receivable from voluntary or involuntary pools or underwriting associations. Equity and Deposits in Pools Equity and deposits in pools Operating Lease, Right-of-Use Asset Operating lease right-of-use-assets Goodwill Goodwill Finite-Lived Intangible Assets, Net Intangible assets Other Assets Other assets Assets Total assets Assets held by SNIA Liabilities [Abstract] Liabilities Liability for Claims and Claims Adjustment Expense Reserves for losses and LAE at end of period Reserves for losses and LAE at beginning of year Losses and loss adjustment expense reserves Unearned Premiums Unearned premium reserves Accounts Payable and Accrued Liabilities Accounts payable and accrued liabilities Broker-Dealer, Payable to Other Broker-Dealer and Clearing Organization Payable for securities purchased Reinsurance Payable Payable to reinsurers Taxes Payable Taxes payable Long-Term Debt Long-term debt Operating Lease, Liability Total Operating lease liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies (Note 8) Equity, Attributable to Parent [Abstract] Shareholders' equity Common Stock, Value, Issued Common stock: $0.01 par value; 30,000,000 shares authorized; 18,103,084 and 18,051,631 shares issued Additional Paid in Capital, Common Stock Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss, net of taxes Retained Earnings (Accumulated Deficit) Retained earnings Treasury Stock, Common, Value Treasury stock, at cost: 3,419,947 shares Equity, Attributable to Parent Balance Balance Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Statement [Table] Statement [Line Items] Basis of Presentation Share Repurchase Program Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Fixed maturity securities, Cost or Amortized Cost Totals, Amortized Cost Fixed maturity securities, cost or amortized cost Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest Fixed maturity securities, Allowance for Expected Credit Losses Ending balance of period Beginning of period Fixed maturity securities, allowance for expected credit losses Equity Securities, FV-NI, Cost Equity securities, at cost Equity securities, Cost or Amortized Cost Accounts Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Noncurrent Balance, end of period Balance, beginning of period Allowance for expected credit losses Common Stock, Par or Stated Value Per Share Common stock par value (in dollars per share) Common Stock, Shares Authorized Common stock shares authorized Common Stock, Shares, Issued Common stock shares issued Treasury Stock, Common, Shares Treasury stock shares Consolidated Statements of Operations Revenues [Abstract] Revenues Premiums Earned, Net Net earned premiums Net Investment Income Net investment income Net investment income Adjustment for income from the undistributed earnings (losses) of the entity's unconsolidated equity method investments. Earnings From Partnership Investments Earnings from partnership investments Marketable Security, Realized Gain (Loss) Net realized gains on investments Net realized gains on investments Equity Securities, FV-NI, Unrealized Gain (Loss) Change in net unrealized gains on equity securities Change in net unrealized gains on equity securities The amount of credit loss (benefit) expense. Credit Loss Benefit Expenses Credit loss (expense) benefit Credit loss expense Amount of commission income. Commission Income Commission income Reflects finance and all other revenue and income not otherwise specified in the income statement. Finance and Other Income Finance and other service income Revenues Total revenue Benefits, Losses and Expenses [Abstract] Expenses Policyholder Benefits and Claims Incurred, Net Losses and loss adjustment expenses Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes underwriting, operating and related expenses. Underwriting, Operating And Related Expenses Underwriting, operating and related expenses Other Expenses Other expense Interest Expense, Nonoperating Interest expense Benefits, Losses and Expenses Total expenses Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income taxes Income Tax Expense (Benefit) Income tax expense Net income Net (loss) income Earnings per Share Earnings per weighted average common share: Earnings Per Share, Basic Basic Basic earnings per share (in dollars per share) Earnings Per Share, Diluted Diluted Diluted earnings per share (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Dividends declared Cash dividends paid per common share Weighted Average Number of Shares Outstanding, Diluted [Abstract] Number of shares used in computing earnings per share: Weighted Average Number of Shares Outstanding, Basic Basic Basic earnings per share denominator Weighted Average Number of Shares Outstanding, Diluted Diluted Diluted earnings per share denominator Consolidated Statements of Comprehensive Income (Loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss), net of tax: OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Unrealized holding gains (losses) during the period, net of income tax expense (benefit) of ($83), $2,020, ($1,404) and $6,178. Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Reclassification adjustment for net realized gains on investments included in net income, net of income tax benefit of ($298), ($447), ($1,690) and ($1,343). Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Other comprehensive income (loss), net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Income tax (benefit) expense on unrealized holding gains (losses) during the period Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Income tax expense on reclassification adjustment for net realized gains on investments included in net income Consolidated Statements of Changes in Shareholders' Equity Equity Components [Axis] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid-in Capital [Member] Additional Paid-in Capital AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Loss, Net of Taxes Retained Earnings [Member] Retained Earnings Treasury Stock, Common [Member] Treasury Stock OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Unrealized gains and losses on securities available for sale, net of deferred federal income taxes Stock Issued During Period, Value, New Issues Restricted share awards issued Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Recognition of employee share-based compensation, net of deferred federal income taxes APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Recognition of employee share-based compensation, net of deferred federal income taxes Dividends, Common Stock Dividends paid and accrued Consolidated Statements of Cash Flows Lender Name [Axis] Line of Credit Facility, Lender [Domain] Pertains to RBS Citizens, NA. RBS Citizens Citizens loan Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cash flows from operating activities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Accretion (Amortization) of Discounts and Premiums, Investments Investment amortization, net Depreciation, Depletion and Amortization, Nonproduction Fixed asset depreciation, net Share-Based Payment Arrangement, Expense Stock based compensation Deferred Income Tax Expense (Benefit) Credit for deferred income taxes Realized Investment Gains (Losses) Net realized gains on investments Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Earnings from partnership investments Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable, net Increase (Decrease) in Interest and Dividends Receivable Accrued investment income Increase (Decrease) in Reinsurance Recoverable Receivable from reinsurers Increase (Decrease) in Prepaid Reinsurance Premiums Ceded unearned premiums Increase (Decrease) in Deferred Policy Acquisition Costs Deferred policy acquisition costs Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Taxes recoverable/payable Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Losses and loss adjustment expense reserves Increase (Decrease) in Unearned Premiums Unearned premium reserves Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued liabilities Increase (Decrease) in Reinsurance Payables Payable to reinsurers Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash provided by operating activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Cash flows from investing activities: Payments to Acquire Debt Securities, Available-for-Sale Fixed maturities purchased The cash outflow to acquire equity securities. Payment To Acquire Equity Securities Fv Ni Equity securities purchased Payments to Acquire Equity Method Investments Other invested assets purchased Proceeds from Sale of Debt Securities, Available-for-Sale Proceeds from sales and paydowns of fixed maturities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Proceeds from maturities, redemptions, and calls of fixed maturities Proceeds from Maturities, Prepayments and Calls of Short-Term Investments Proceeds from maturities of short-term investments Proceeds from Sale of Equity Securities, FV-NI Proceed from sales of equity securities Proceeds from Sale and Maturity of Other Investments Proceeds from other invested assets redeemed Payments to Acquire Property, Plant, and Equipment Fixed assets purchased Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash used for investing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Cash flows from financing activities: Proceeds from Lines of Credit Proceeds from Citizens loan Repayments of Lines of Credit Payments on FHLB loan Payments of Ordinary Dividends, Common Stock Dividends paid to shareholders Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash used for financing activities Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash and cash equivalents at end of period Cash and cash equivalents at beginning of year Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis of Presentation Recent Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Recent Accounting Pronouncements Earnings Per Share [Text Block] Earnings per Share Share-Based Compensation Share-Based Payment Arrangement [Text Block] Share-Based Compensation Investments. Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments Allowance for Expected Credit Losses Allowance for Credit Losses [Text Block] Allowance for Expected Credit Losses Loss and Loss Adjustment Expense Reserves Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Loss and Loss Adjustment Expense Reserves Commitments and Contingencies. Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Debt Debt Disclosure [Text Block] Debt Income Taxes Income Tax Disclosure [Text Block] Income Taxes Share Repurchase Program Treasury Stock [Text Block] Share Repurchase Program Leases Lessee, Operating Leases [Text Block] Leases Subsequent Events Subsequent Events [Text Block] Subsequent Events Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Computation of basic and diluted EPS Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Schedule of restricted stock and performance-based restricted stock activity Marketable Securities [Table Text Block] Gross unrealized gains and losses on investments in securities Investments Classified by Contractual Maturity Date [Table Text Block] Amortized cost and the estimated fair value of fixed maturity securities, by maturity Realized Gain (Loss) on Investments [Table Text Block] Gross realized gains and losses on sales of investments Unrealized Gain (Loss) on Investments [Table Text Block] Gross unrealized losses included in the Company's investment portfolio and the fair value of those securities Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table Text Block] Reconciliation of beginning and ending balances of allowance for expected credit losses on fixed maturities classified as available for sale Investment Income [Table Text Block] Components of net investment income Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Fair value measurements for investments Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Changes in the Company's Level 3 fair value securities Accounts Receivable, Allowance for Credit Loss [Table Text Block] Schedule of accounts receivable, net of allowance for expected credit losses Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Schedule of reconciliation of beginning and ending reserves for losses and loss adjustment expenses (LAE) Lease, Cost [Table Text Block] Schedule of operating lease cost Tabular disclosure of the information related to leases. Other Information Related To Leases Table Text Block Schedule of other information related to leases Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Schedule of the maturities of lease liabilities Business Combination [Table] Product and Service [Axis] Product and Service [Domain] Fiduciary and Trust [Member] Fiduciary assets Statistical Measurement [Axis] Statistical Measurement [Domain] Maximum [Member] Maximum Consolidation Items [Axis] Consolidation Items [Domain] Consolidation, Eliminations [Member] Business Combination [Line Items] Basis of Presentation Insurance Commissions and Fees Commission income eliminated in consolidation Summary of Significant Accounting Policies Number of Reportable Segments Number of reportable operating segment Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Earnings per Weighted Average Common Share Undistributed Continuing Operation Earnings (Loss), Allocation to Participating Securities, Basic Allocation of income for participating shares Net Income (Loss) Available to Common Stockholders, Basic Net income from continuing operations attributed to common shareholders Represents the information pertaining to weighted average common shares outstanding. Weighted Average Number Of Shares Outstanding Total weighted average common shares outstanding, including participating shares The average number of shares or units attributable to participating shares. Weighted Average Number of Participating Shares Less: weighted average participating shares Represents the additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of non-vested stock grants under share based payment arrangements. Incremental Common Shares Attributable to Non Vested Stock Grants Under Share Based Payment Arrangements Common equivalent shares- non-vested performance stock grants Undistributed Earnings, Basic [Abstract] Undistributed earnings attributable to common shareholders - basic and diluted: Income (Loss) from Continuing Operations, Per Basic Share Net income from continuing operations attributable to common shareholders -Basic Earnings Per Share, Basic, Undistributed Undistributed earnings Undistributed Earnings, Diluted [Abstract] Undistributed earnings attributable to common shareholders - diluted Income (Loss) from Continuing Operations, Per Diluted Share Net income from continuing operations attributable to common shareholders -Diluted Earnings Per Share, Diluted, Undistributed Undistributed earnings Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive common shares Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Plan Name [Axis] Plan Name [Domain] Represents the information pertaining to the Amended 2018 Long-Term Incentive Plan. The Amended 2018 Plan Represents the information pertaining to 2002 Management Omnibus Incentive Plan. The Incentive Plan The 2002 Incentive Plan Plan prior to 2018 Plan Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Maximum shares of common stock with respect to which awards may be granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Shares available for future grant (in shares) Restricted Stock [Member] Restricted Stock Represents a share based compensation restricted stock award with vesting based on achievement of performance conditions. Performance-based Shares Under Restriction Vesting [Axis] Vesting [Domain] Share-Based Payment Arrangement, Tranche One [Member] First anniversary of grant date Share-Based Payment Arrangement, Tranche Two [Member] Second anniversary of grant date Share-Based Payment Arrangement, Tranche Three [Member] Third anniversary of grant date Title and Position [Axis] Title and Position [Domain] Management [Member] Non-executives employees Minimum [Member] Minimum Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Vesting percentage (as a percent) Percentage of actual payout of target shares awarded depending upon the level of achievement of the respective market and performance conditions during a three fiscal-year performance period. Share Based Compensation Arrangement by Share Based Payment Award, Payout Percentage Actual payouts (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Shares Under Restriction Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Outstanding at end of period (in shares) Outstanding at beginning of year (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Vested and unrestricted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted Average Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Outstanding at end of period (in dollars per share) Outstanding at beginning of year (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested and unrestricted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Unrecognized compensation expense related to non-vested restricted stock awards Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Weighted average period expected for recognition of compensation expense related to non-vested restricted stock awards Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Total fair value of the shares that were vested and unrestricted during the period Share-Based Payment Arrangement, Expense, after Tax Compensation expense, net of tax Share-Based Payment Arrangement, Expense, Tax Benefit Income tax benefit from compensation expense Marketable Securities [Table] Financial Instrument [Axis] Financial Instruments [Domain] US Treasury Securities [Member] U.S. Treasury securities US States and Political Subdivisions Debt Securities [Member] Obligations of states and political subdivisions Residential mortgage-backed securities consisting primarily of obligations of U.S. Government agencies including collateralized mortgage obligations issued, guaranteed and/or insured by the following issuers: Government National Mortgage Association (GNMA), Federal Home Loan Mortgage Corporation (FHLMC), Federal National Mortgage Association (FNMA) and the Federal Home Loan Bank (FHLB). Residential mortgage-backed securities Commercial Mortgage-Backed Securities [Member] Commercial mortgage-backed securities Asset-Backed Securities, Securitized Loans and Receivables [Member] Other asset-backed securities Corporate Debt Securities [Member] Corporate and other securities Ownership interest or right to acquire or dispose of ownership interest in corporations and other legal entities for which ownership interest is represented by shares of common or preferred stock, convertible securities, stock rights, or stock warrants. Also includes interests in mutual funds. Equity securities Represents information pertaining to other invested assets. Other invested assets Marketable Securities [Line Items] Marketable Securities Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Fixed maturity securities, Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Fixed maturity securities, Gross Unrealized Losses Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in equity securities. Equity Securities, Accumulated Gross Unrealized Gain, before Tax Equity securities, Gross Unrealized Gains Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in equity securities. Equity Securities, Accumulated Gross Unrealized Loss, before Tax Equity securities, Gross Unrealized Losses Equity Method Investments, Fair Value Disclosure Other invested assets, Estimated Fair Value Represents the adjusted cost of investments as follows: the amortized cost of debt securities, the cost of equity securities and the carrying value of equity method investments. Investments Adjusted Cost Cost or Amortized Cost Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities. Also includes cumulative unrealized gains on other types of investments. Investments Gross Unrealized Gain before Tax Gross Unrealized Gains Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities. Also includes cumulative unrealized losses on other types of investments. Investments Gross Unrealized Loss before Tax Gross Unrealized Losses Investments, Fair Value Disclosure Estimated Fair Value Number of investments in marketable securities measured at fair value with change in fair value recognized in other comprehensive income , in unrealized loss position. Marketable Securities, Available-for-sale, Unrealized Loss Position, Number of Positions Number of securities in an unrealized loss position Available-for-Sale Securities, Debt Maturities [Abstract] Available-for-sale Securities, Debt Maturities Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Due in one year or less, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Due after one year through five years, Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Due after five years through ten years, Amortized Cost Amount after adjustments of available-for-sale debt securities at cost, maturing in the tenth fiscal year through the twentieth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Available For Sale Securities Debt Maturities After Ten Through Twenty Years Amortized Cost Due after ten years through twenty years, Amortized Cost Amount after adjustments of available-for-sale debt securities at cost, maturing after the twentieth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Available For Sale Securities Debt Maturities After Twenty Years Amortized Cost Due after twenty years, Amortized Cost Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Asset-backed securities, Amortized Cost Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Estimated Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Due in one year or less, Estimated Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Due after one year through five years, Estimated Fair Value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Due after five years through ten years, Estimated Fair Value Fair value of available-for-sale debt securities maturing in the tenth fiscal year through the twentieth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Available For Sale Securities Debt Maturities After Ten Through Twenty Years Fair Value Due after ten years through twenty years, Estimated Fair Value Fair value of available-for-sale debt securities maturing after the twentieth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Available For Sale Securities Debt Maturities After Twenty Years Fair Value Due after twenty years, Estimated Fair Value Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Asset-backed securities, Estimated Fair Value Debt Securities, Available-for-Sale, Realized Gain Gross realized gains, Fixed maturity securities Equity Securities, FV-NI, Realized Gain Gross realized gains, Equity securities Debt Securities, Available-for-Sale, Realized Loss Gross realized losses, Fixed maturity securities Equity Securities, FV-NI, Realized Loss Gross realized losses, Equity securities Debt Securities [Member] Subtotal, fixed maturity securities Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Estimated Fair Value, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Estimated Fair Value, 12 Months or More Debt Securities, Available-for-Sale, Unrealized Loss Position Estimated Fair Value, Total Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Unrealized Losses, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Unrealized Losses, 12 Months or More Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Unrealized Losses, Total Not available. Equity Securities [Abstract] Equity Securities Amount of investment in equity security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months. Equity Securities FV-NI Continuous Unrealized Loss Position, Less than 12 Months Estimated Fair Value, Less than 12 Months Amount of investment in equity security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months. Equity Securities FV-NI Continuous Unrealized Loss Position, 12 Months or Longer Estimated Fair Value, 12 Months or More Amount of investment in equity security measured at fair value with change in fair value recognized in other comprehensive income, in unrealized loss position. Equity Securities, FV-NI, Unrealized Loss Position Estimated Fair Value, Total Amount of accumulated unrealized loss on investment in equity security measured at fair value with change in fair value recognized in other comprehensive income, in continuous unrealized loss position for less than 12 months. Equity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Unrealized Losses, Less than 12 Months Amount of accumulated unrealized loss on investment in equity security measured at fair value with change in fair value recognized in other comprehensive income, in continuous unrealized loss position for 12 months or longer. Equity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Unrealized Losses, 12 Months or More Amount of accumulated unrealized loss on investment in equity security measured at fair value with change in fair value recognized in other comprehensive income, in unrealized loss position. Equity Securities, Unrealized Loss Position, Accumulated Loss Unrealized Losses, Total Marketable Securities [Abstract] Marketable Securities Amount of investment in marketable security measured at fair value with change in fair value recognized in other comprehensive income , in continuous unrealized loss position for less than 12 months. Marketable Securities, Continuous Unrealized Loss Position, Less than 12 Months Estimated Fair Value, Less than 12 Months Amount of investment in marketable security measured at fair value with change in fair value recognized in other comprehensive income (, in continuous unrealized loss position for more than 12 months. Marketable Securities, Continuous Unrealized Loss Position, 12 Months or Longer Estimated Fair Value, 12 Months or More Amount of investment in marketable security measured at fair value with change in fair value recognized in other comprehensive income, in unrealized loss position. Marketable Securities, Unrealized Loss Position Estimated Fair Value, Total Amount of accumulated unrealized loss on investment in marketable security measured at fair value with change in fair value recognized in other comprehensive income , in continuous unrealized loss position for less than 12 months. Marketable Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Unrealized Losses, Less than 12 Months Amount of accumulated unrealized loss on investment in marketable security measured at fair value with change in fair value recognized in other comprehensive income, in continuous unrealized loss position for 12 months or longer. Marketable Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Unrealized Losses, 12 Months or More Amount of accumulated unrealized loss on investment in marketable security measured at fair value with change in fair value recognized in other comprehensive income, in unrealized loss position. Marketable Securities, Unrealized Loss Position, Accumulated Loss Unrealized Losses, Total Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded Credit losses on securities with no previously recorded credit losses Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not to Sell before Recovery, Credit Loss, Previously Recorded, Expense (Reversal) Net increases (decreases) in allowance on previously impaired securities Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Sold Reduction due to sales Represents information pertaining to subprime mortgage debt securities. Subprime mortgage debt securities Marketable Securities Securities held Total investment securities Investment Income, Net [Abstract] Components of net investment income Interest Income, Operating Interest on fixed maturity securities Dividend Income, Operating Dividends on equity securities Income (Loss) from Equity Method Investments Equity in earnings of other invested assets Other Interest and Dividend Income Interest on other assets Interest and Dividend Income, Operating Total investment income Investment Income, Investment Expense Investment expenses Fair Value of Financial Instruments Fair Value, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Basis [Axis] Portion at Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Estimated Fair Value Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1 [Member] Level 1 Inputs Fair Value, Inputs, Level 2 [Member] Level 2 Inputs Fair Value, Inputs, Level 3 [Member] Level 3 Inputs Asset Class [Axis] Asset Class [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair value of financial instruments Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Changes in the Company's Level 3 fair value securities Alternative Investment Alternative investments fair value The required advance notice before quarter end so that the entity may dispose of an equity security investment which has a fair value determined using the trust's net asset value. Equity Investment Required Advance Notice Period to Dispose Period of advance notice before quarter end Transfers of assets amount measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. Fair Value Assets Level 1 To Level 2 Transfers Amount 1 Transfers from Level 1 to Level 2 Transfers of assets amount measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1. Fair Value Assets Level 2 To Level 1 Transfers Amount 1 Transfers from Level 2 to Level 1 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Balance at end of period Balance at beginning of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Transfers into Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Transfers out of Level 3 Represents number of level 3 securities held by the company. Level 3 Securities Held Number Number of level 3 securities held Restructuring Cost [Table] Restructuring Plan [Axis] Restructuring Plan [Domain] Represents information pertaining to FAIR plan restructuring. Fair Plan Restructuring [Member] Fair Plan Restructuring Restructuring Cost and Reserve [Line Items] Investments Amount of investment in Fair Plan Trust. Fair Plan Trust, Investment Fair plan trust investment SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income Net Investment Income Accounts Receivable, after Allowance for Credit Loss [Abstract] Accounts Receivable Net of Allowance for Expected Credit Losses Accounts Receivable, Allowance for Credit Loss [Roll Forward] Allowance for Expected Credit Losses Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) Current period change for expected credit losses Accounts Receivable, Allowance for Credit Loss, Writeoff Writeoffs of uncollectable accounts receivable Collaborative Arrangement and Arrangement Other than Collaborative [Table] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Represents the information pertaining to CAR Commercial Automobile Program and the Taxi/Limo Program. CAR Commercial Automobile Program and the Taxi/Limo Program Represents the information pertaining to other contracts. Other Contracts Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Commitments and Contingencies Allowance for Expected Credit Losses The percentage of reinsurance recoverable from the total reinsurance recoverable. Reinsurance Recoverable, Percentage on Total Percentage of reinsurance recoverable Reinsurance Recoverable, Allowance for Credit Loss Expected credit losses Reinsurance Recoverables on Unpaid Losses, Gross Less receivable from reinsurers related to unpaid losses and LAE Liability for Unpaid Claims and Claims Adjustment Expense, Net Net reserves for losses and LAE at end of period Net reserves for losses and LAE at beginning of year Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Incurred losses and LAE, related to: Current Year Claims and Claims Adjustment Expense Current year Prior Year Claims and Claims Adjustment Expense Prior year accident reserves decrease Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Total incurred losses and LAE Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Paid losses and LAE related to: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Total paid losses and LAE Commitments [Member] Limited partnership commitments Represents the committed amount of investment in limited partnership made by the company. Investment In Limited Partnership, Committed Amount Total commitment to Investment in limited partnership Represents the amount of contribution made by the company to the limited partnership investment. Limited Partnership, Investment Made Contribution made to date Represents the amount of remaining committed capital due to be called. Limited Partnership, Investment To Be Made Remaining committed capital Line of Credit Facility [Table] Represents information pertaining to Federal Home Loan Bank of Boston. F H L B of Boston FHLB loan Credit Facility [Axis] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Agreement Variable Rate [Axis] Variable Rate [Domain] Prime Rate [Member] Prime rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Federal Funds Effective Swap Rate Secured Overnight Financing Rate (SOFR) [Member] SOFR Line of Credit Facility [Line Items] Debt Maximum borrowing capacity under the credit facility including the accordion without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Line Of Credit Facility, Maximum Borrowing Capacity Including Accordion Borrowing capacity with accordion Debt Instrument, Description of Variable Rate Basis Variable interest rate basis Debt Instrument, Basis Spread on Variable Rate Spread on variable rate (as a percent) Represents the minimum amount of unpaid required principal repayments that result in an event of default. Debt Instrument Default Trigger Principal Amount Minimum Default trigger, principal amount Long-Term Line of Credit Outstanding amount Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Commitment fee (as a percent) Maximum borrowing capacity provided that loan is collateralized by eligible invested assets. Maximum Borrowing Capacity Collateralized Eligible Invested Assets Maximum borrowing capacity using eligible invested assets as collateral Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate Advance term Federal Home Loan Bank, Advances, Interest Rate Interest rate percentage Federal Home Loan Bank Borrowings, Fair Value Disclosure Fair value of loan Interest Expense, Borrowings Interest expense, borrowings Share Repurchase Program, Authorized, Amount Share repurchase program authorized amount Treasury Stock, Shares, Acquired Share repurchases (in shares) Number of previously issued common shares repurchased by the issuing entity and held in treasury for possible reissue/ Treasury Stock, Common, Shares Repurchased And Reissued Treasury stock shares repurchased cumulative (in shares) Amount allocated to previously issued common shares repurchased by the issuing entity and held in treasury for future reissue. Treasury Stock, Common, Value Repurchased And Reissued Value of treasury stock repurchased to date Lessee, Lease, Description [Table] Lessee, Lease, Description [Line Items] Leases The remaining term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Lessee, Operating Lease, Remaining Term of Contract Operating lease, remaining lease term Lessee, Operating Lease, Existence of Option to Extend [true false] Operating lease, existence of option to extend Lessee, Operating Lease, Renewal Term Operating lease, renewal term Lessor Disclosure [Abstract] Leases Operating Lease, Cost Operating lease cost Operating Lease, Payments Operating cash flows from operating leases Operating Lease, Weighted Average Remaining Lease Term Weighted average remaining lease term Operating leases Operating Lease, Weighted Average Discount Rate, Percent Weighted average discount rate Operating leases Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year 2026 Lessee, Operating Lease, Liability, to be Paid, Year One 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two 2028 Lessee, Operating Lease, Liability, to be Paid Total lease payments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less imputed interest Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Events Business Combination [Axis] Business Combination [Domain] Represents Safety Insurance Group. Safety Insurance Group [Member] Safety Insurance Group Subsequent Event [Line Items] Subsequent Events Business Combination, Price Per Share Merger agreement share price n/a Rule10b51ArrModified [Flag] Rule 10b5-1 Arrangement Modified n/a NonRule10b51ArrModified [Flag] Non-Rule 10b5-1 Arrangement Modified