Equity Components [Axis] Common Stock Preferred Stock Capital in Excess of Par Accumulated Other Comprehensive Income (Loss) Retained Earnings Treasury Stock Debt Security Category [Axis] Fixed Maturity Securities Political Subdivisions Of States Territories And Possessions [Member] Fixed Maturity Securities Corporate And Other Bonds Industrial And Miscellaneous [Member] Fixed Maturity Securities Total Fixed Maturity Securities [Member] Equity Securities Preferred Stocks [Member] Equity Securities Common Stocks [Member] Equity Securities Total Equity Securities [Member] Investment Type [Axis] Less Than One Year [Member] One To Five Years [Member] Five To Ten Years [Member] More Than 10 Years [Member] US Treasury Securities [Member] Insurance Policy [Axis] Changes In Unearned Premiums [Member] Premiums Earned [Member] Premiums Written [Member] Fixed Maturity Securities Residential Mortgage and other asset backed securities [Member] Residential mortgage-backed securities [Member] Plan Name [Axis] 2014 Plan [Member] Range [Axis] 2010 2011 2012 2013 2014 2015 2016 2017 Longterm Debt Type [Axis] 5.50% Senior Unsecured Notes Discount Variable Rate [Axis] Issuance costs Long-term Debt, Type [Axis] Asset Class [Axis] Hedge Fund Award Type [Axis] Restricted Stock U.S. Treasury Securities and Obligations of U.S. Government [Member] 2018 Fair Value Hierarchy and NAV [Axis] Carrying Value [Member] Investments by Category [Axis] Fair Value [Member] Level 1 Level 2 Level 3 Concentration Risk Type [Axis] Personal Lines [Member] Initial $1,000,000 [Member] $1,000,000 - $10,000,000 [Member] Over $10,000,000 [Member] Personal Umbrella [Member] $1,000,000 - $5,000,000 [Member] Over $5,000,000 [Member] Commercial Lines [Member] Initial $750,000 [Member] $750,000 - $4,500,000 [Member] Over $4,500,000 [Member] Commercial Umbrella [Member] Catastrophe [Member] 2019 Initial $5,000,000 [Member] $5,000,000 - $450,000,000 [Member] Over $450,000,000 [Member] $5,000,000 - $320,000,000 [Member] Over $320,000,000 [Member] Initial $7,500,000 [Member] $7,500,000 - $610,000,000 [Member] Over $610,000,000 [Member] Lease Arrangement, Type [Axis] Office Lease [Member] Document And Entity Information Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Is Entity's Reporting Status Current? Entity Filer Category Entity Emerging Growth Company Entity Small Business Entity Shell Company Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Year Focus Statement of Financial Position [Abstract] Assets Fixed-maturity securities, held-to-maturity, at amortized cost (fair value of $4,114,072 at June 30, 2019 and $4,426,416 at December 31, 2018) Fixed-maturity securities, available-for-sale, at fair value (amortized cost of $160,085,628 at June 30, 2019 and $155,431,261 at December 31, 2018) Equity securities, at fair value (cost of $22,254,788 at June 30, 2019 and $18,305,986 at December 31, 2018) Other investments Total investments Cash and cash equivalents Premiums receivable, net Reinsurance receivables, net Deferred policy acquisition costs Intangible assets, net Property and equipment, net Deferred income taxes, net Other assets Total assets Liabilities Loss and loss adjustment expense reserves Unearned premiums Advance premiums Reinsurance balances payable Deferred ceding commission revenue Accounts payable, accrued expenses and other liabilities Income taxes payable Long-term debt, net Total liabilities Commitments and Contingencies (note 11) Stockholders' Equity Preferred stock, $.01 par value; authorized 2,500,000 shares Common stock, $.01 par value; authorized 20,000,000 shares; issued 11,802,087 shares at June 30, 2019 and 11,775,148 shares at December 31, 2018; outstanding 10,774,648 shares at June 30, 2019 and 10,747,709 shares at December 31, 2018 Capital in excess of par Accumulated other comprehensive income (loss) Retained earnings Total Treasury stock, at cost, 1,027,439 shares at June 30, 2019 and at December 31, 2018 Total stockholders' equity Total liabilities and stockholders' equity Fixed-maturity securities, held-to-maturity, fair value Fixed-maturity securities, available-for-sale, amortized cost Equity securities, available-for-sale, cost Preferred stock, par value Preferred stock, authorized shares Common stock, par value Common stock, authorized shares Common stock, issued shares Common stock, outstanding shares Treasury stock, shares Income Statement [Abstract] Revenues Net premiums earned Ceding commission revenue Net investment income Net gains (losses) on investments Other income Total revenues Expenses Loss and loss adjustment expenses Commission expense Other underwriting expenses Other operating expenses Depreciation and amortization Interest expense Total expenses Income (loss) before taxes Income tax expense (benefit) Net income (loss) Other comprehensive income (loss), net of tax Gross change in unrealized gains (losses) on available-for-sale-securities Reclassification adjustment for losses included in net income Net change in unrealized gains (losses) Income tax benefit (expense) related to items of other comprehensive income (loss) Other comprehensive income (loss), net of tax Comprehensive income (loss) Earnings (loss) per common share: Basic Diluted Weighted average common shares outstanding Basic Diluted Dividends declared and paid per common share Statement [Table] Statement [Line Items] Beginning Balance, Shares Beginning Balance, Amount Cumulative effect of adoption of updated accounting guidance for equity financial instruments at January 1, 2018 Beginning Balance, Shares, as adjusted Beginning Balance, Amount, as adjusted Stock-based compensation Shares deducted from exercise of stock options for payment of withholding taxes, Shares Shares deducted from exercise of stock options for payment of withholding taxes, Amount Vesting of restricted stock awards, Shares Vesting of restricted stock awards, Amount Shares deducted from restricted stock awards for payment of withholding taxes, Shares Shares deducted from restricted stock awards for payment of withholding taxes, Amount Exercise of stock options, Shares Exercise of stock options, Amount Acquisition of treasury stock, Shares Acquisition of treasury stock, Amount Dividends Net loss Change in unrealized losses on available-for-sale securities, net of tax Ending Balance, Shares Ending Balance, Amount Statement of Cash Flows [Abstract] Cash flows from operating activities: Net (loss) income Adjustments to reconcile net (loss) income to net cash flows provided by operating activities: Net (gains) losses on sale of investments Net unrealized (gains) losses of equity investments Net unrealized gains of other investments Amortization of bond premium, net Amortization of discount and issuance costs on long-term debt Deferred income tax expense (Increase) decrease in operating assets: Premiums receivable, net Reinsurance receivables, net Deferred policy acquisition costs Other assets Increase (decrease) in operating liabilities: Loss and loss adjustment expense reserves Unearned premiums Advance premiums Reinsurance balances payable Deferred ceding commission revenue Accounts payable, accrued expenses and other liabilities Net cash flows provided by operating activities Cash flows from investing activities: Purchase - fixed-maturity securities available-for-sale Purchase - equity securities Sale and redemption - fixed-maturity securities held-to-maturity Sale or maturity - fixed-maturity securities available-for-sale Sale - equity securities Acquisition of property and equipment Net cash flows used in investing activities Cash flows from financing activities: Proceeds from exercise of stock options Withholding taxes paid on net exercise of stock options Withholding taxes paid on vested retricted stock awards Purchase of treasury stock Dividends paid Net cash flows used in financing activities Decrease in cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Supplemental disclosures of cash flow information: Cash paid for income taxes Cash paid for interest Organization, Consolidation and Presentation of Financial Statements [Abstract] 1. Nature of Business and Basis of Presentation Accounting Policies [Abstract] 2. Accounting Policies Investments [Abstract] 3. Investments Fair Value Disclosures [Abstract] 4. Fair Value Measurements 5. Fair Value of Financial Instruments and Real Estate Insurance [Abstract] 6. Property and Casualty Insurance Activity Debt Disclosure [Abstract] 7. Debt Stockholders' Equity Attributable to Parent [Abstract] 8. Stockholders' Equity Income Tax Disclosure [Abstract] 9. Income Taxes Earnings Per Share [Abstract] 10. Earnings/(Loss) Per Common Share Commitments and Contingencies Disclosure [Abstract] 11. Commitments and Contingencies Deferred Compensation Plan 12. Deferred Compensation Plan Subsequent Events [Abstract] 13. Subsequent Events Use of Estimates Principles of Consolidation Accounting Changes Accounting Pronouncements Schedule of available for sale securities Schedule of equity securities Schedule of available for sale securities by contractual maturity Schedule of other investments Schedule of held to maturity securities Schedule of held to maturity securities by contractual maturity Schedule of investment income Schedule of securities with realized gains and losses on investments Schedule of securities with unrealized losses Schedule of fair value measurements Schedule of hedge fund investments Fair value hierarchy of long-term debt Schedule of fair value of financial instruments Schedule of earned premiums Schedule of loss and loss adjustment expenses Allocated claim adjustment expenses Reconciliation of the net incurred and paid claims Schedule of line of business Schedule of single maximum risks under treaties Schedule of ceding commission revenue Schedule of debt Schedule of stock options activity Schedule of restricted stock awards activity Schedule of deferrred tax assets and liabilities Losses subject to annual limitation Schedule of net earnings/(loss) per common share Lease cost Schedule of lease liability maturities Schedule of lease liability maturities Cost or amortized cost Gross unrealized gains Gross unrealized losses - less than 12 months Gross unrealized loss - more than 12 months Gross unrealized losses Estimated fair value Net unrealized gains/(losses) Amortized cost Estimated fair value Cost Unrealized gain Estimated fair value Cost or amortized cost Gross unrealized gains Gross unrealized losses - less than 12 months Gross unrealized loss - more than 12 months Estimated fair value Net unrealized gains Amortized cost Estimated fair value Income: Fixed-maturity securities Equity securities Cash and cash equivalents Total Expenses: Investment expenses Net investment income Fixed-maturity securities: Gross realized gains Gross realized losses Total fixed-maturity securities Equity securities: Gross realized gains Gross realized losses Total equity securities Net realized gains (losses) Equity securities: Gross gains Gross losses Total equity securities Other investments: Gross gains Gross losses Total other investments Net unrealized gains (losses) Estimated fair value - less than 12 months Unrealized losses - less than 12 months Number of positions held - less than 12 months Estimated fair value - 12 months or more Unrealized losses - 12 months or more Number of positions held - 12 months or more Estimated fair value - total Unrealized losses - total Proceeds from the sale and redemption of fixed-maturity securities held-to-maturity Proceeds from the sale or maturity of fixed-maturity securities available-for-sale Proceeds from the sale of equity securities U.S. Treasury securities and obligations of U.S. government corporations and agencies Political subdivisions of states, territories and possessions Corporate and other bonds industrial and miscellaneous Residential mortgage and other asset backed securities Total fixed maturities Equity securities Total investments Hedge fund investments Senior Notes due 2022 Fixed-maturity securities held-to-maturity Cash and cash equivalents Premiums receivable Reinsurance receivables Real estate, net of accumulated depreciation Reinsurance Policy, Type [Axis] Direct Assumed Ceded Net Balance at beginning of period Less reinsurance recoverables Net balance, beginning of period Incurred related to: Current year Prior years Total incurred Paid related to: Current year Prior years Total paid Net balance at end of period Add reinsurance recoverables Balance at end of period Statistical Measurement [Axis] 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 Total IBNR Cumulative number of reported claims 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 Total Net liability for unpaid claim and allocated claim adjustment expenses for the accident years presented All outstanding liabilities before 2009, net of reinsurance Liabilities for claims and claim adjustment expenses, net of reinsurance Liabilities for allocated loss and loss adjustment expenses, net of reinsurance Total reinsurance recoverable on unpaid losses Unallocated loss adjustment expenses Total gross liability for loss and LAE reserves Percent ceded Percent ceded - first million dollars of coverage Percent ceded - excess of one million dollars of coverage Risk retained Losses per occurrence subject to quota share reinsurance coverage Excess of loss coverage above quota share coverage In excess of Total reinsurance coverage per occurrence Losses per occurrence subject to reinsurance coverage Expiration date Initial loss subject to personal lines quota share treaty Risk retained per catastrophe occurrence Catastrophe loss coverage in excess of quota share coverage Reinstatement premium protection Risk retained Provisional ceding commissions earned Contingent ceding commissions earned Total commissions earned Incurred losses and loss adjustment expenses are net of reinsurance recoveries under reinsurance contracts Prior year loss development Net contingent ceding commissions payable Number of options outstanding, beginning Number of options granted Number of options exercised Number of options forfeited Number of options outstanding, ending Number of options vested and exercisable Weighted average exercise price outstanding, beginning Weighted average exercise price granted Weighted average exercise price exercised Weighted average exercise price forfeited Weighted average exercise price outstanding, ending Weighted average exercise price vested and exercisable Weighted average remaining contractual life (in years) outstanding, beginning Weighted average remaining contractual life (in years) forfeited Weighted average remaining contractual life (in years) outstanding, ending Weighted average remaining contractual life (in years) vested and exercisable Aggregate intrinsic value outstanding, beginning Aggregate intrinsic value granted Aggregate intrinsic value exercised Aggregate intrinsic value forfeited Aggregate intrinsic value outstanding, ending Aggregate intrinsic value vested and exercisable Dividends declared Stock-based compensation expense related to stock options is net of estimated forfeitures Closing price of common stock Total intrinsic value of options exercised Total intrinsic value of options forfeited Shares reserved Stock-based compensation, restricted stock awards Deferred tax asset: Net operating loss carryovers Claims reserve discount Unearned premium Deferred ceding commission revenue Other Total deferred tax assets Deferred tax liability: Investment in KICO Deferred acquisition costs Intangibles Depreciation and amortization Net unrealized gains (losses) of securities - available for sale Total deferred tax liabilities Net deferred income tax asset Federal only, current year Amount subject to annual limitation, federal only Total federal only State only Valuation allowance State only, net of valuation allowance Total deferred tax asset from net operating loss carryovers Federal only, current year expiration date Amount subject to annual limitation, federal only expiration date State only expiration date Net operating loss carryover Weighted average number of shares outstanding Effect of dilutive securities, common share equivalents, stock options Effect of dilutive securities, common share equivalents, restricted stock awards Weighted average number of shares outstanding, used for computing diluted earnings per share Commitments And Contingencies Operating lease Short-term leases Total lease cost Cash payments included in the measurement of lease liability in operating cash flows Discount rate Remaining lease term in years Remainder of 2019 2020 2021 2022 2023 Thereafter Total undiscounted lease payments Less: present value adjustment Operating lease liability Rent expenses Custom Element. Custom Element. Custom Element. Amortized Cost. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Fair Value. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Custom Element. Range fifty eight member. Range fifty five member. Range fifty four member. Range fifty member. Range fifty nine member. Range fifty one member. Range fifty seven member. Range fifty six member. Range fifty two member. Range fifty three member. Custom Element. Range forty eight member. Range forty nine member. Range forty seven member. Range forty six member. Custom Element. Custom Element. Custom Element. Custom Element. 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Investments Assets [Default Label] AdvancePremiums Liabilities [Default Label] Stockholders' Equity before Treasury Stock Liabilities and Equity Revenues [Default Label] Benefits, Losses and Expenses Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Other Comprehensive Income (Loss), Net of Tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent Shares, Issued Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Dividends Gain (Loss) on Sale of Investments Unrealized Gain (Loss) on Investments UnrealizedGainLossOnOtherInvestments Increase (Decrease) in Premiums Receivable Increase (Decrease) in Reinsurance Recoverable Increase (Decrease) in Deferred Policy Acquisition Costs Increase (Decrease) in Other Operating Assets Increase (Decrease) in Future Policy Benefit Reserves Increase (Decrease) in Unearned Premiums IncreseDecreseInAdvancePremiums Increase (Decrease) in Reinsurance Payables Increase (Decrease) in Deferred Revenue Increase (Decrease) in Accounts Payable and Accrued Liabilities Net Cash Provided by (Used in) Operating Activities Payments to Acquire Available-for-sale Securities, Equity Payments to Acquire Debt Securities, Available-for-sale Payments to Acquire Other Property, Plant, and Equipment Net Cash Provided by (Used in) Investing Activities Payments for Repurchase of Common Stock Payments of Dividends Net Cash Provided by (Used in) Financing Activities Cash and Cash Equivalents, Period Increase (Decrease) Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Unrealized Loss on Securities FairValue CostOrAmortizedCost GrossUnrealizedGains GrossUnrealizedLosseslessThan12Months GrossUnrealizedLossmoreThan12Months FairValue1 AmortizedCostHeldToMaturitySecurities FairValueHeldToMaturitySecurities CashAndCashEquivalents Investment Income, Net Available-for-sale Securities, Gross Realized Gains Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments AvailableforsaleSecuritiesNetUnrealizedGainLoss GrossGainsOnOtherInvestments GrossLossesOnOtherInvestments EquityInvestments Cash and Cash Equivalents, Fair Value Disclosure PaidRelatedToCurrentYear PaidRelatedToPriorYears IncurredClaimsPropertyCasualtyAndLiability2010 IncurredClaimsPropertyCasualtyAndLiability2011 IncurredClaimsPropertyCasualtyAndLiability2012 IncurredClaimsPropertyCasualtyAndLiability2013 IncurredClaimsPropertyCasualtyAndLiability2014 IncurredClaimsPropertyCasualtyAndLiability2015 IncurredClaimsPropertyCasualtyAndLiability2016 IncurredClaimsPropertyCasualtyAndLiability2017 IncurredClaimsPropertyCasualtyAndLiability2018 IncurredClaimsPropertyCasualtyAndLiability2019 Policyholder Benefits and Claims Incurred, Net, Property, Casualty and Liability ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2010 ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2011 ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2012 ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2013 ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2014 ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2015 ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2016 ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2017 ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2018 ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpense2019 Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net RiskRetained Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number NumberOfOptionsExercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value DeferredCedingCommissionRevenue Accumulated Amortization, Debt Issuance Costs, Noncurrent Deferred Tax Assets, Valuation Allowance