75000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 75030 - Statement - Consolidated Statements of Income (Unaudited) link:presentationLink link:calculationLink link:definitionLink 75040 - Statement - Consolidated Statements of Comprehensive Income (Unaudited) link:presentationLink link:calculationLink link:definitionLink 75050 - Statement - Consolidated Statements of Changes in Shareholders' Equity (Unaudited) link:presentationLink link:calculationLink link:definitionLink 75060 - Statement - Consolidated Statements of Cash Flows (Unaudited) link:presentationLink link:calculationLink link:definitionLink 995455 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 995465 - Disclosure - Restricted Stock, Restricted Stock Units, and Stock Options link:presentationLink link:calculationLink link:definitionLink 995475 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 995485 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 995495 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 995505 - Disclosure - Loss Reserves link:presentationLink link:calculationLink link:definitionLink 995515 - Disclosure - Comprehensive Income and Accumulated Other Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 995525 - Disclosure - Fair Values of Financial Instruments link:presentationLink link:calculationLink link:definitionLink 995535 - Disclosure - Treasury Stock link:presentationLink link:calculationLink link:definitionLink 995545 - Disclosure - Segment Reporting link:presentationLink link:calculationLink link:definitionLink 995555 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 995565 - Disclosure - Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 995575 - Disclosure - Fair Values of Financial Instruments (Policies) link:presentationLink link:calculationLink link:definitionLink 995585 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 995595 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 995605 - Disclosure - Loss Reserves (Tables) link:presentationLink link:calculationLink link:definitionLink 995615 - Disclosure - Comprehensive Income and Accumulated Other Comprehensive Loss (Tables) link:presentationLink link:calculationLink link:definitionLink 995625 - Disclosure - Fair Values of Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 995635 - Disclosure - Treasury Stock (Tables) link:presentationLink link:calculationLink link:definitionLink 995645 - Disclosure - Basis of Presentation - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995655 - Disclosure - Restricted Stock, Restricted Stock Units, and Stock Options - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995665 - Disclosure - Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Detail) link:presentationLink link:calculationLink link:definitionLink 995675 - Disclosure - Investments - Gross Unrealized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses, Carrying Amount and Fair Value of Investments Classified as Held-to-Maturity (Detail) link:presentationLink link:calculationLink link:definitionLink 995685 - Disclosure - Investments - Gross Unrealized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses and Fair Value of Investments Classified as Available-for-Sale (Detail) link:presentationLink link:calculationLink link:definitionLink 995695 - Disclosure - Investments - Gross Unrealized Gains and Losses and Cost of Equity (Detail) link:presentationLink link:calculationLink link:definitionLink 995705 - Disclosure - Investments - Summary of Carrying Amounts and Fair Value of Investments in Fixed Maturity Securities, Classified as Held-to-Maturity (Detail) link:presentationLink link:calculationLink link:definitionLink 995715 - Disclosure - Investments - Summary of Amortized Cost and Fair Value of Investments in Fixed Maturity Securities, Classified as Available-for-Sale (Detail) link:presentationLink link:calculationLink link:definitionLink 995725 - Disclosure - Investments - Investment Securities Continuous Unrealized Loss Position (Detail) link:presentationLink link:calculationLink link:definitionLink 995735 - Disclosure - Investments - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995745 - Disclosure - Investments - Changes in Allowance for Credit Losses by Major Security Type of Investments Classified as Held-to-Maturity (Detail) link:presentationLink link:calculationLink link:definitionLink 995755 - Disclosure - Income Taxes - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995765 - Disclosure - Loss Reserves - Liability for Unpaid Loss and Loss Adjustment Expenses, Net of Related Amounts Recoverable from Reinsurers (Detail) link:presentationLink link:calculationLink link:definitionLink 995775 - Disclosure - Loss Reserves - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995785 - Disclosure - Loss Reserves - Change in Allowance for Credit Losses on Amounts Recoverable from Reinsurers (Detail) link:presentationLink link:calculationLink link:definitionLink 995795 - Disclosure - Comprehensive Income and Accumulated Other Comprehensive Loss - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995805 - Disclosure - Comprehensive Income and Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss (AOCI) (Detail) link:presentationLink link:calculationLink link:definitionLink 995815 - Disclosure - Comprehensive Income and Accumulated Other Comprehensive Loss - Reclassification Out of Accumulated Other Comprehensive Loss (Detail) link:presentationLink link:calculationLink link:definitionLink 995825 - Disclosure - Fair Values of Financial Instruments - Schedule of Assets Measured at Fair Value on Recurring Basis (Detail) link:presentationLink link:calculationLink link:definitionLink 995835 - Disclosure - Fair Values of Financial Instruments - Schedule of Assets Measured at Amortized Cost Net of Allowance For Credit Losses (Detail) link:presentationLink link:calculationLink link:definitionLink 995845 - Disclosure - Fair Values of Financial Instruments - Summary of Carrying Amounts and Corresponding Fair Values for Financial Instruments (Detail) link:presentationLink link:calculationLink link:definitionLink 995855 - Disclosure - Treasury Stock - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995865 - Disclosure - Treasury Stock - Summary of Company's Purchases of Common Stock (Details) link:presentationLink link:calculationLink link:definitionLink 995875 - Disclosure - Segment Reporting - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 995885 - Disclosure - Subsequent Events - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink Proceeds from Sale of Property, Plant, and Equipment, Total Proceeds from sales of property and equipment Proceeds from Sale of Property, Plant, and Equipment Reinsurance Recoverable for Unpaid Claims and Claims Adjustments, Total Less amounts recoverable from reinsurers on unpaid loss and loss adjustment expenses Add amounts recoverable from reinsurers on unpaid loss and loss adjustment expenses Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Domestic Common Stock [Member] Domestic Common Stock [Member] Domestic common stock. Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Current accident year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Average Price Paid per Share Shares purchased, average price Shares Acquired, Average Cost Per Share Available-for Sale, Fair Value of Investments with Unrealized Losses, 12 Months or Greater Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Equity [Abstract] Entity Current Reporting Status Entity Current Reporting Status Cash dividend per share Dividends Payable, Amount Per Share Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Common stock, shares authorized Common Stock, Shares Authorized Total incurred Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Earnings Per Share, Basic [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Entity Shell Company Entity Shell Company Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Cash and Cash Equivalent Policyholder deposits Policyholder Contract Deposit Common stock, shares issued Common Stock, Shares, Issued Asset Class Asset Class [Domain] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Purchase of treasury stock Purchase of treasury stock Treasury Stock, Value, Acquired, Cost Method External Credit Rating, Moody's External Credit Rating, Moody's [Domain] Entity Filer Category Entity Filer Category Total liabilities and shareholders’ equity Liabilities and Equity Summary of Carrying Amounts and Corresponding Fair Values for Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Reserves for loss and loss adjustment expenses Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Valuation allowance Deferred Tax Assets, Valuation Allowance Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent U.S. federal income tax statutory rate Subsequent Event [Line Items] Subsequent Event [Line Items] Asset-Backed Securities [Member] Asset-Backed Securities [Member] Corporate Fixed Income Securities [Member] Corporate Fixed Income Securities [Member] Corporate fixed income securities. Balance, beginning of period Balance, end of period Accounts Receivable, Allowance for Credit Loss Additional paid-in capital Additional Paid in Capital, Common Stock After one year through five years, Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost U.S. Agency-Based Mortgage-Backed Securities [Member] Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] Loss Reserves Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Calculation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Summary of Carrying Amount, Amortized Cost and Fair Value of Investments in Fixed Maturity Securities, by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Earnings Per Share, Basic, Total Basic earnings per common share Basic Earnings Per Share, Basic Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Held-to-Maturity, Gross Unrealized Gains Equity securities, Gross Unrealized Gains Equity Securities Fv Ni Gross Unrealized Gain Equity securities fair value net income gross unrealized gain. Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Beginning Balance Stock options outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Gross Unrealized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses and Fair Value of Investments Classified as Available-for-sale Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Net realized losses on disposal of assets Proceeds from sales of equity securities Proceeds from Sale of Equity Securities, FV-NI Adjustments to reconcile net income to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Special Cash Dividend Declared [Member] Special cash dividend declared. Date of record for dividend payment Dividends Payable, Date of Record After ten years, Carrying Amount Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale, Total Proceeds from sales and maturities of investments available-for-sale Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale Reinsurance Recoverables, Including Reinsurance Premium Paid, Total Reinsurance Recoverables, Including Reinsurance Premium Paid Amounts recoverable from reinsurers (net of allowance for credit losses of $217 and $264 at June 30, 2026 and December 31, 2025, respectively) Uncertain tax positions recognized Tax Adjustments, Settlements, and Unusual Provisions O 2025 Q3 Dividends [Member] O 2025 Q3 dividends. Shareholders’ equity: Equity, Attributable to Parent [Abstract] Entity Small Business Entity Small Business Accumulated earnings Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Total Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Total Held-to-Maturity, Allowance for Credit Losses Fixed maturity securities, held-to-maturity, allowance for credit losses Balance Balance Debt Securities, Held-to-Maturity, Allowance for Credit Loss Held-to-Maturity, Allowance for Credit Losses Restricted Stock, Restricted Stock Units, and Stock Options Share-Based Payment Arrangement [Text Block] Purchases of short-term investments Payments to Acquire Short-Term Investments Organization, Consolidation and Presentation of Financial Statements [Abstract] Amendment Flag Amendment Flag Schedule Of Held To Maturity Securities [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Liabilities and shareholders’ equity Liabilities and Equity [Abstract] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash used in operating activities Segment reporting, codm, profit (loss) measure, how used, description Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description Common Stock [Member] Common Stock [Member] Policyholder Benefits and Claims Incurred, Net, Total Loss and loss adjustment expenses incurred Policyholder Benefits and Claims Incurred, Net Purchases of equity securities Payment for Acquisition, Trading Security, Held-for-Investment Schedule Of Available For Sale Securities [Line Items] Debt Securities, Available-for-Sale [Line Items] Portion at Fair Value Measurement [Member] [Default] Fair Value Disclosure Item Amounts [Default] Portion at Fair Value Measurement [Member] Entity Address, Address Line One Entity Address, Address Line One Marketable Securities [Table] Marketable Securities [Table] Fair Value, Inputs, Level 1 [Member] Fair Value Hierarchy and NAV [Axis] Earnings per share Earnings Per Share [Abstract] Amortized cost Debt Securities, Held-to-Maturity, Year One, Originated, Current Fiscal Year Total Total Available For Sale Securities Debt Securities And Equity Securities Fv Ni Available for sale securities debt securities and equity securities Fv-Ni. Investment Type Investment Type [Axis] Net realized gains (losses) on investments Net realized gains (losses) on investments Marketable Securities, Realized Gain (Loss) Available-for Sale, Fair Value of Investments with Unrealized Losses, Total Debt Securities, Available-for-Sale, Unrealized Loss Position Purchases of investments available-for-sale Payments to Acquire Debt Securities, Available-for-Sale Document Type Document Type Entity Central Index Key Entity Central Index Key Investments, Debt and Equity Securities [Abstract] Equity, Class of Treasury Stock [Line Items] Change in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Subsequent Event Type Subsequent Event Type [Domain] Accrued interest receivable Accrued Investment Income Receivable Share-based compensation APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition Common stock, par value Common Stock, Par or Stated Value Per Share Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Net current period other comprehensive income (loss) Liabilities: Liabilities [Abstract] Investments maturity period using default rate Investments Maturity Period Using Default Rate Investments maturity period using default rate. Available-for-sale, Amortized Cost Fixed maturity securities, amortized cost Debt Securities, Available-for-Sale, Amortized Cost Available-for-sale, Fair Value Securities available-for-sale - fixed maturity Fixed maturity securities-available-for-sale, at fair value (amortized cost $290,264, allowance for credit losses of $0 at June 30, 2026 and amortized cost $317,116, allowance for credit losses of $0 at December 31, 2025) Fixed maturity securities-available-for-sale, at fair value Net realized gains (losses) on investments Realized Investment Gains (Losses), Total Realized Investment Gains (Losses) Net realized losses (gains) on investments Net realized (losses) gains on investments Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Fair Values of Financial Instruments Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Axis] Fair Value [Member] Estimate of Fair Value Measurement [Member] Marketable Securities, Total Short-term investments Marketable Securities Current Fiscal Year End Date Current Fiscal Year End Date Document Quarterly Report Document Quarterly Report Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Entity Address, State or Province Entity Address, State or Province Officers and employees and non-employee directors. Officers and employees and non-employee directors [Member] Officers and Employees and Non-employee Directors [Member] Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Available-for-sale, Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Restricted stock and RSUs Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Schedule Of Trading Securities And Other Trading Assets [Table] Debt Securities, Trading, and Equity Securities, FV-NI [Table] AAA/AA/A Ratings [Member] A A A Or A A Or A Ratings [Member] AAA/AA/A ratings. Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Liability for Unpaid Loss and Loss Adjustment Expenses, Net of Related Amounts Recoverable from Reinsurers Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income : Performance Awards [Member] Performance Shares [Member] Deferred income taxes Deferred Income Tax Assets, Net Subsequent Event [Member] Subsequent Event [Member] Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Amounts reclassified from accumulated other comprehensive loss O 2025 Q4 Dividends [Member] O 2025 Q4 Dividends. Within one year, Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Available-for-Sale Securities [Member] Available-for-Sale Securities [Member] Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Loss [Member] Treasury stock, shares Treasury Stock, Common, Shares Beginning Balance, Shares Ending Balance, Shares Beginning Balance, Shares Ending Balance, Shares Schedule Of Held To Maturity Securities [Table] Debt Securities, Held-to-Maturity [Table] Schedule of Assets Measured at Amortized Cost Net of Allowance For Credit Losses Held To Maturity Securities Table [Text Block] Fair value schedule of assets carried at amortized cost. Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Domain] Without single maturity date, Amortized Cost Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Minimum [Member] Minimum [Member] Class of Treasury Stock [Table] Financial Instrument Financial Instrument [Axis] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Segment Reporting [Abstract] Schedule of Assets Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] After ten years, Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Other Income Fee and other income Total paid Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Reclassification Out Of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Accounts Receivable, Credit Loss Expense (Reversal) Provision for credit loss benefit Premiums receivable, net Increase (Decrease) in Premiums Receivable Forecast [Member] Scenario Forecast [Member] Equity securities, Cost Equity securities, cost Equity Securities, FV-NI, Cost Held-to-Maturity, Carrying Amount Held-to-maturity, Carrying Amount, Totals Debt Securities, Held-to-Maturity, Excluding Accrued Interest, after Allowance for Credit Loss, Current Fixed maturity securities-held-to-maturity, at amortized cost net of allowance for credit losses of $60 and $73 at June 30, 2026 and December 31, 2025, respectively, (fair value $327,158 and $344,576 at June 30, 2026, and December 31, 2025, respectively) Liability for Claims and Claims Adjustment Expense, Total Reserves for loss and loss adjustment expenses Balance, beginning of period Balance, end of period Liability for Claims and Claims Adjustment Expense Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Held-to-maturity, Amortized Cost, Totals Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss O 2024 Q3 Dividends. O 2024 Q3 Dividends [Member] Basic Weighted average common shares Weighted Average Number of Shares Outstanding, Basic, Total Basic weighted average common shares Scenario [Axis] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Available-for Sale, Gross Unrealized Losses, 12 Months or Greater Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Amounts held for others Funds Held under Reinsurance Agreements, Liability Subsequent Events Subsequent Events [Text Block] Total shareholders’ equity Beginning Balance Ending Balance Equity, Attributable to Parent Number of majority securities Number Of Investments Securities Held To Maturity Number of investments securities held to maturity. Statement of Stockholders' Equity [Abstract] Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss, Total Held-to-Maturity, Gross Unrealized Losses Treasury Stock [Member] Treasury Stock, Common [Member] Date of dividend declared Dividends Payable, Date Declared Debt Securities Held To Maturity Credit Quality Indicator [Table] Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table] After five years through ten years, Carrying Amount Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Increase (Decrease) in Other Operating Assets, Total Other assets Increase (Decrease) in Other Operating Assets Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Reclassifications [Text Block] Reclassifications Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Federal income taxes recoverable Treasury Stock, Value, Total Treasury Stock, Value Treasury stock, at cost (2,278,192 and 1,974,140 shares at June 30, 2026 and December 31, 2025, respectively) Entity Address, City or Town Entity Address, City or Town Liability for Unpaid Claims and Claims Adjustment Expense, Activity in Liability [Abstract] Reconciliation of the Beginning and Ending Reserve Balances, Net of Related Amounts Recoverable from Reinsurers Number of reportable segments Number of Reportable Segments Security Exchange Name Security Exchange Name Net balance, beginning of period Net balance, end of period Liability for Unpaid Claims and Claims Adjustment Expense, Net Schedule of Amortized Cost Held-to-Maturity Securities Aggregated By Credit Quality Indicator Debt Securities, Held-to-Maturity, Credit Quality Indicator [Table Text Block] Income before income taxes Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Changes in Allowance for Credit Losses by Major Security Type of Investments Classified as Held-to-Maturity Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Table Text Block] Measurement Basis Measurement Basis [Axis] Statistical Measurement Statistical Measurement [Domain] Share-based compensation expense Share-Based Payment Arrangement, Expense Document Period End Date Document Period End Date After ten years, Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Title of Individual Title and Position [Axis] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Baa/BBB Ratings [Member] Baa Or B B B Ratings [Member] Baa Or BBB Ratings. Statement of Financial Position [Abstract] Restricted Stock Units (RSUs) [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification Out of Accumulated Other Comprehensive Loss [Member] Individual fixed maturity held in unrealized loss position Number Of Individual Fixed Maturity Securities In Unrealized Loss Position Number of individual fixed maturity securities in unrealized loss position. After ten years, Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Total liabilities Liabilities Financial Instruments Financial Instruments [Domain] Number of equity incentive plans Number Of Equity Incentive Plans Number of equity incentive plans. Summary of Company's Purchases of Common Stock Summary of Company's Purchases of Common Stock [Table Text Block] Summary of company’s purchases of common stock. Premiums Written, Gross, Total Gross premiums written Premiums Written, Gross Restricted Stock [Member] Restricted Stock [Member] Available-for Sale, Gross Unrealized Losses, Less Than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Diluted weighted average common shares Diluted Weighted Average Number of Shares Outstanding, Diluted Entity File Number Securities Act File Number Dividends to shareholders Payments of Ordinary Dividends, Common Stock Change in unrealized losses on debt securities, net of tax OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Unrealized gain (loss) on debt securities, net of tax Add incurred related to: Reserves For Loss And Loss Adjustment Expenses [Abstract] Reserves for Loss and Loss Adjustment Expenses [Abstract] Other Assets, Total Other assets Other Assets Proceeds from Sale, Maturity and Collection of Short-Term Investments, Total Proceeds from sales and maturities of short-term investments Proceeds from Sale, Maturity and Collection of Short-Term Investments Cover [Abstract] Schedule Of Trading Securities And Other Trading Assets [Line Items] Debt and Equity Securities, FV-NI [Line Items] After five years through ten years, Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Accounts payable and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities S 2025 Q4 Dividends [Member] S 2025 Q4 Dividends. Investments Investments [Domain] Without single maturity, Fair Value Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value Scenario [Domain] U.S. Treasury Securities [Member] US Treasury Securities [Member] Rule 10b 51 Arr Modified Flag Rule 10b 51 Arr Modified Flag. Rule 10b5-1 Arr Modified Flag Segment Reporting Disclosure [Text Block] Segment Reporting Subsequent Event [Table] Subsequent Event [Table] Employees and Non-employee Directors [Member] Employees And Non Employee Directors [Member] Employees and non-employee directors. Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Common stock issued, shares Proceeds from maturities of investments held-to-maturity Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Adopted Accounting Guidance New Accounting Pronouncements, Policy [Policy Text Block] After one year through five years, Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Comprehensive Income (Loss) Note [Text Block] Comprehensive Income and Accumulated Other Comprehensive Loss Depreciation, Total Depreciation Depreciation Carrying Amount [Member] Reported Value Measurement [Member] Investment, Type [Extensible Enumeration] Held-to-Maturity Securities [Member] Held-to-Maturity Securities [Member] Common stock, shares outstanding Beginning Balance, Shares Ending Balance, Shares Common Stock, Shares, Outstanding Commissions Insurance Commissions Dividends Dividends [Domain] Document Transition Report Document Transition Report Fixed maturity securities, fair value Held To Maturity Securities Fair Value Securities held-to-maturity-fixed maturity, Fair Value Held-to-maturity, Fair Value, Totals Statement of Cash Flows [Abstract] B Ratings [Member] B Ratings [Member] B ratings. Common stock issued Stock Issued During Period, Value, New Issues Prior accident years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Earnings Per Share Earnings Per Share [Text Block] Treasury Stock Treasury Stock [Text Block] O 2026 Q3 Dividends [Member] O 2026 Q3 Dividends. Net income Net income Equity Securities, FV-NI, Unrealized Gain (Loss), Total Net unrealized gains (losses) on equity securities Equity Securities, FV-NI, Unrealized Gain (Loss) Net unrealized (gains) losses on equity securities Net unrealized gains (losses) on equity securities Change in Allowance for Credit Losses on Amounts Recoverable from Reinsurers Accounts Receivable, Allowance for Credit Loss [Table Text Block] Assets Assets [Abstract] Document Fiscal Year Focus Document Fiscal Year Focus After five years through ten years, Fair Value Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Changes in Accumulated Other Comprehensive Loss (AOCI) Less paid related to: Loss And Loss Adjustment Expenses Payments For Claims [Abstract] Loss And Loss Adjustment Expenses Payments For Claims [Abstract] Investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Market value of shares Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture, Total Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Unearned premiums Increase (Decrease) in Unearned Premiums Investment Securities Continuous Unrealized Loss Position Unrealized Gain (Loss) on Investments [Table Text Block] Fair Value Measurement, Policy [Policy Text Block] Fair Values of Financial Instruments Investment Securities Continuous Unrealized Loss Position Schedule of Unrealized Loss on Investments [Table Text Block] Net Investment Income Net Investment Income, Total Net investment income Accounts payable and other liabilities Other Liabilities Other Liabilities, Total Fair Value Disclosures [Abstract] Equity securities, Gross Unrealized Losses Equity Securities Fv Ni Gross Unrealized Loss Equity Securities fair value net income gross unrealized loss. Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Non Rule 10b 51 Arr Modified Flag Non Rule 10b 51 Arr Modified Flag. Non-Rule 10b5-1 Arr Modified Flag Share-Based Payment Arrangement [Abstract] Total revenues Revenues Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash provided by investing activities Payable for investments purchased Payable, Investment, Purchase Title of 12(b) Security Title of 12(b) Security Without single maturity, Carrying Amount Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date Share Repurchase Program, Remaining Authorized, Amount Approximate Dollar Value of Shares that May Yet Be Purchased Under the Program Income Taxes Income Tax Disclosure [Text Block] Debt Securities Available For Sale Allowance For Credit Loss Available-for-sale, Allowance for Credit Losses Debt Securities, Available-for-Sale, Allowance for Credit Loss, Ending Balance Debt Securities, Available-for-Sale, Allowance for Credit Loss, Beginning Balance Debt Securities, Available-for-Sale, Allowance for Credit Loss, Total Fixed maturity securities, available-for-sale, allowance for credit losses Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Income Tax Disclosure [Abstract] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Additional Paid-In Capital [Member] Additional Paid-in Capital [Member] Number of fixed maturity securities, allowance for credit loss Number Of Fixed Maturity Securities Held To Maturity Allowance For Credit Loss Number of fixed maturity securities, held to maturity allowance for credit loss. Gross Unrealized Gains and Losses and Cost of Equity Schedule Of Cost Of Equity Securities Table [Text Block] Schedule of Cost of equity securities. Measurement Frequency Measurement Frequency [Domain] Share Repurchase Program, Authorized, Amount Share repurchase program, new limit amount Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Trading Symbol Trading Symbol Equity securities Equity securities, at fair value (cost $31,164 and $31,165 at June 30, 2026 and December 31, 2025, respectively) Equity securities, at fair value Subsequent Event Type Subsequent Event Type [Axis] Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Fair Value, Measurements, Recurring [Member] Fair Value, Recurring [Member] Debt Securities, Held-to-Maturity, Credit Loss Expense (Reversal) Provision for credit loss benefit Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Ceded premiums written Ceded Premiums Written Accumulated Earnings [Member] Equity Components [Axis] Debt Securities, Held-to-Maturity [Table Text Block] Gross Unrealized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses, Carrying Amount and Fair Value of Investments Classified as Held-to-Maturity Equity Component Equity Component [Domain] Asset Class Asset Class [Axis] Deferred Policy Acquisition Cost, Ending Balance Deferred Policy Acquisition Cost, Beginning Balance Deferred policy acquisition costs Deferred Policy Acquisition Cost Total investments Investments Within one year, Carrying Amount Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling within One Year U.S. Treasury Securities and Obligations of U.S. Government Agencies [Member] US Treasury and Government [Member] Statement of Comprehensive Income [Abstract] Accrued interest receivable Increase (Decrease) in Accrued Investment Income Receivable Maximum [Member] Maximum [Member] Date of payment for dividend Dividends Payable, Date to be Paid Statistical Measurement Statistical Measurement [Axis] Net premiums written Premiums Written, Net Common Stock, Value, Issued Common stock: voting-$0.01 par value authorized shares-50,000,000 in 2026 and 2025; 20,814,250 and 20,769,021 shares issued; and 18,536,058 and 18,794,881 shares outstanding at June 30, 2026 and December 31, 2025, respectively Net Income (Loss) Available to Common Stockholders, Diluted Net Income (Loss) Available to Common Stockholders, Diluted, Total Net income Finance lease purchases Finance Lease, Principal Payments Premium Receivable, Allowance for Credit Loss, Ending Balance Premium Receivable, Allowance for Credit Loss, Beginning Balance Premiums receivable, allowance for credit losses Premium Receivable, Allowance for Credit Loss Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Reclassification Out of Accumulated Other Comprehensive Loss Dividends Dividends [Axis] Comprehensive income: Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive income (loss): Deferred policy acquisition costs Increase (Decrease) in Deferred Policy Acquisition Costs Premiums Receivable, Net, Total Premiums Receivable, Net Premiums receivable (net of allowance for credit losses of $4,159 and $4,172 at June 30, 2026 and December 31, 2025, respectively) Marketable Securities [Line Items] Marketable Securities [Line Items] Total expenses Benefits, Losses and Expenses Current accident year Current Year Claims and Claims Adjustment Expense Total Number of Shares Purchased as Part of Publicly Announced Program Number of Shares Purchased as Part of Publicly Announced Program Number of shares purchased as part of publicly announced program. Premiums Earned, Net, Total Net premiums earned Premiums Earned, Net Payment, Tax Withholding, Share-Based Payment Arrangement Tax benefit from share-based payments Share-based compensation-related tax withholding Available-for Sale, Gross Unrealized Losses, Total Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Credit Rating, Moody's Credit Rating, Moody's [Axis] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Debt Security Category Debt Security Category [Axis] Entity Registrant Name Entity Registrant Name Available-for-sale, Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Total Number of Shares Purchased Purchase of treasury stock, Shares Purchase of treasury stock, Shares Treasury Stock, Shares, Acquired Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income Loss [Table] Subsequent Events [Abstract] Income Tax Expense (Benefit), Total Income tax expense Income tax expense Income Tax Expense (Benefit) Measurement Frequency Measurement Frequency [Axis] Expenses Costs and Expenses [Abstract] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding States and Political Subdivisions [Member] US States and Political Subdivisions Debt Securities [Member] Net Income (Loss) Attributable to Parent, Diluted, Total Net income Net Income (Loss) Attributable to Parent, Diluted Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss, net Payments to Acquire Property, Plant, and Equipment, Total Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Change in investment related allowance for credit losses Change In Investment Related Allowance For Credit Losses Change in investment related allowance for credit losses. Total assets Assets Income Statement [Abstract] Insurance-related assessments Insurance Related Assessments Assessments mandated by statute or regulatory authority that is related directly or indirectly to underwriting activities, including pools for self-insurance and excluding premium taxes and income taxes. The funds derived from the assessments generally enable a government guarantor to pay insurance claims in the event that the underwriting insurer is insolvent or otherwise unable to meet its payment obligations. Deferred Income Tax Expense (Benefit), Total Deferred income taxes Deferred Income Tax Expense (Benefit) Non Employee Directors [Member] Non Employee Directors [Member] Non employee directors. Common stock issued, Shares Stock Issued During Period, Shares, New Issues Unearned premiums Unearned Premiums Earnings Per Share, Diluted, Total Diluted earnings per common share Diluted Earnings Per Share, Diluted Policyholder dividends Policyholder Dividends, Expense Title of Individual Title and Position [Domain] Dividends, Common Stock, Total Dividends to shareholders Dividends, Common Stock Without single maturity date, Fair value Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value City Area Code City Area Code Federal income tax recoverable Income Taxes Receivable Percentage of comparable consolidated amounts Percentage Of Comparable Consolidated Amount Percentage of comparable consolidated amount. Insurance [Abstract] Amounts held for others and policyholder deposits Increase Decrease Amounts Held For Others And Policyholder Deposits Increase decrease amounts held for others and policyholder deposits. Investments: Investments [Abstract] APIC, Share-Based Payment Arrangement, Other, Increase for Cost Recognition Tax benefit from share-based payments Property, Plant and Equipment, Net, Total Property and equipment, net Property, Plant and Equipment, Net Officer [Member] Executive Officers [Member] Officer [Member] Prior accident years Loss and LAE Related to Prior Periods Prior Year Claims and Claims Adjustment Expense Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Number of policyholder have revenue 10% or more from transactions | Policyholder Number Of Policyholder Have Revenue Ten Percentage Or More From Transactions Number of policyholder have revenue ten percentage or more from transactions. Accumulated Earnings [Member] Retained Earnings [Member] Share-based compensation Share-Based Payment Arrangement, Noncash Expense, Total Share-Based Payment Arrangement, Noncash Expense Available-for Sale, Fair value of Investments with Unrealized Losses, Less Than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months After five years through ten years, Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Provision for investment related credit loss benefit Provision For Investment Related Credit Loss Benefit Expense Provision for investment related credit loss benefit expense. Debt Securities Held To Maturity Credit Quality Indicator [Line Items] Debt Securities, Held-to-Maturity, Credit Quality Indicator [Line Items] Corporate Bonds [Member] Corporate Debt Securities [Member] Debt Securities Available For Sale [Table] Debt Securities, Available-for-Sale [Table] Entity Interactive Data Current Entity Interactive Data Current Individual fixed maturity held in unrealized loss position longer than 12 months Number Of Individual Investment Securities In Unrealized Loss Position Greater Than Twelve Months Number of individual investment securities in unrealized loss position greater than twelve months. Fair Value Measurement Fair Value Measurement [Domain] Operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Prospective Accounting Guidance Accounting Standards Update and Change in Accounting Principle [Text Block] Net amortization of investments Accretion (Amortization) of Discounts and Premiums, Investments Reinsurance balances Increase Decrease Reinsurance Balances Increase decrease reinsurance balances. S 2024 Q3 Dividends. S 2024 Q3 Dividends [Member] Cash dividends declared per common share Common Stock, Dividends, Per Share, Declared Entity Tax Identification Number Entity Tax Identification Number Revenues [Abstract] Revenues Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis of Presentation Local Phone Number Local Phone Number After one year through five years, Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Accumulated Other Comprehensive Income Loss [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Shares used in computing earnings per share Weighted Average Number of Shares Outstanding, Diluted [Abstract] Purchase of treasury stock Purchase of treasury stock Purchase Of Treasury Stock Purchase of treasury stock. Within one year, Fair Value Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value Approximate Dollar Value of Shares that May Yet Be Purchased Under the Program Approximate Dollar Value of Shares that May Yet Be Purchased Under the Program Approximate dollar value of shares that may yet be purchased under the program. Underwriting and certain other operating costs Underwriting And Certain Other Operating Costs Costs incurred during the period related to the acquisition or renewal of insurance contracts. Includes general and administrative expenses. Other comprehensive loss before reclassification Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Other comprehensive income (loss) before reclassification Within one year, Amortized Cost Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost After one year through five years, Carrying Amount Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Rolling after One through Five Years Unrealized Gains On Debt Securities, Net Of Tax [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Unrealized losses on debt securities, net of tax [Member] Reinsurance Recoverable, Allowance for Credit Loss, Ending Balance Reinsurance Recoverable, Allowance for Credit Loss, Beginning Balance Reinsurance Recoverable, Allowance for Credit Loss, Total Amounts recoverable from reinsurers, allowance for credit losses Reinsurance Recoverable, Allowance for Credit Loss Salaries and benefits Labor and Related Expense Entity Emerging Growth Company Entity Emerging Growth Company