Insider Trading Arrangements [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Accrued investment income Accrued Investment Income Receivable Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Additional paid-in capital Additional Paid in Capital Depreciation expense Depreciation Restricted Stock [Member] Restricted Stock [Member] Amortized cost of fixed maturities on deposit with various regulatory authorities Consolidated Balance Sheets [Abstract] Assumed Assumed Premiums Written Basic earnings (loss) per share (in dollars per share) Basic (in dollars per share) Net sales (purchases) of property and equipment Payments for (Proceeds from) Productive Assets Policy Acquisition Costs Deferred Policy Acquisition Costs, Policy [Policy Text Block] Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Ceded Credit Risk, Reinsurer [Domain] Reinsurer, Name [Domain] Reinsurer, Name [Axis] Ceded Credit Risk [Line Items] Ceded Credit Risk [Table] Premiums written Ceded Ceded Premiums Written Current income taxes Increase (Decrease) in Income Taxes Payable Reinsurance balances payable Increase (Decrease) in Reinsurance Payables Net sales (purchases) of short-term investments Net (purchase) sale of short-term investments Payments for (Proceeds from) Short-Term Investments Changes in Assets and Liabilities: Increase (Decrease) in Operating Capital [Abstract] Accrued expenses Increase (Decrease) in Accrued Liabilities Amounts due from affiliate Increase (Decrease) Due from Affiliates Losses and loss expenses Balance at January 1 Balance at end of period Gross liability for unpaid losses and loss expenses Unallocated loss adjustment expenses Class B Common Stock [Member] Class B Common Stock [Member] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Common stock value Common Stock, Value, Issued Stock-Based Compensation Compensation Related Costs, Policy [Policy Text Block] Income Tax (Benefit) Expense [Abstract] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Condensed Financial Information of Parent Company Condensed Financial Information of Parent Company Only Disclosure [Text Block] Percentage of accumulation of losses Contracts in Force Subject to Participation through Reinsurance, Ratio Corporate Securities [Member] Corporate Debt Securities [Member] Current federal income tax Current Federal Tax Expense (Benefit) Interest rate Debt instrument due date Deferred federal income tax Deferred Federal Income Tax Expense (Benefit) Total gross deferred tax liabilities Deferred Tax Liabilities, Gross Deferred policy acquisition costs Beginning Balance Ending Balance Deferred Policy Acquisition Cost Acquisition costs deferred Deferred Policy Acquisition Cost, Capitalization Amortization of deferred policy acquisition costs Amortization charged to earnings Deferred Policy Acquisition Costs, Amortization Expense Deferred policy acquisition costs Deferred policy acquisition costs Increase (Decrease) in Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs [Abstract] Total gross deferred tax assets Deferred Tax Assets, Gross Net deferred tax asset Deferred Tax Assets, Net Net deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Net state operating loss carryforward - DGI Parent Deferred Tax Assets, Operating Loss Carryforwards, State and Local Other Deferred Tax Assets, Other Loss reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Loss Reserves Less valuation allowance Deferred Tax Assets, Valuation Allowance Deferred policy acquisition costs Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost Other Deferred Tax Liabilities, Other Depreciation, amortization and other non-cash items Depreciation, Depletion and Amortization, Nonproduction Derivative instruments or hedging activities Derivative Instruments and Hedges, Assets Diluted earnings (loss) per share (in dollars per share) Diluted (in dollars per share) Direct Direct Premiums Written Basis of Consolidation Consolidation, Policy [Policy Text Block] Available for distribution as dividends Statutory Accounting Practices, Statutory Amount Available for Dividend Payments Effective Income Tax Rate Reconciliation [Abstract] Corporate income tax rate Compensation expense in stock compensation plans Share-Based Payment Arrangement, Expense Stock-Based Compensation [Abstract] Share-Based Payment Arrangement, Additional Disclosure [Abstract] Income tax benefit of stock compensation plans Share-Based Payment Arrangement, Expense, Tax Benefit Shares issued (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Investment in subsidiaries/affiliates (equity method) Equity Securities [Member] Equity Securities [Member] Net losses and loss expenses Net losses and loss expenses (includes affiliated reinsurance of $136,662,558, $150,198,479 and $177,849,040 - see note 3) Policyholder Benefits and Claims Incurred, Net Policyholder dividends Policyholder Dividends, Expense Other underwriting expenses Other Underwriting Expense Fair Values of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Fixed interest rate on advances Federal Home Loan Bank, Advance, Branch of FHLBank, Interest Rate FHLB stock purchased and owned as part of the agreement Federal Home Loan Bank Stock Unaffiliated Reinsurance [Abstract] Goodwill and Other Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Consolidated Statements of Income [Abstract] Losses and loss expenses Losses and loss expenses Net losses and loss expenses - affiliated reinsurance After tax decrease in retained earnings Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle Income Taxes Income Tax Disclosure [Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Federal income taxes recoverable Income Taxes Receivable Dividends received deduction Effective Income Tax Rate Reconciliation, Deduction, Dividends, Amount Fixed-maturity dispositions Tax at federal statutory rate Additional tax paid for prior year Tax-exempt interest Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount Income taxes Income Taxes Paid, Net Accrued investment income Increase (Decrease) in Accrued Investment Income Receivable Incurred related to [Abstract] Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Charges for services Insurance Commissions Guaranty Fund and Other Insurance-Related Assessments Insurance Disclosure [Text Block] Liability for Claims and Claims Adjustment Expense [Abstract] Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract] Other intangible assets Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Interest Interest Expense, Operating and Nonoperating Investment expenses Investment Income, Investment Expense Investments Investment, Policy [Policy Text Block] Total investments Investments Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Total liabilities Liabilities Liabilities Liabilities [Abstract] Total liabilities and stockholders' equity Liabilities and Equity Liabilities and Stockholders' Equity Liabilities and Equity [Abstract] Losses and Loss Expenses Liability Reserve Estimate, Policy [Policy Text Block] Borrowing capacity currently available Line of Credit Facility, Current Borrowing Capacity Line of Credit Facility, Lender [Domain] Unsecured demand line of credit Line of credit facility remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Line of Credit Facility [Abstract] Lender Name [Axis] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of Credit Facility [Table] Line of Credit Facility [Table] Lines of Credit [Member] Line of Credit [Member] Borrowings under lines of credit Long-Term Line of Credit Outstanding borrowings Long-Term Debt Total paid Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Held to maturity, at amortized cost (fair value $631,568,929 and $611,526,338; net of allowance for expected credit losses of $1,388,240 and $1,325,847) Held to maturity, carrying value Balance at end of period Balance at beginning of period Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss Mortgage-Backed Securities [Member] Collateralized Mortgage-Backed Securities [Member] Related and Nonrelated Parties [Axis] Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Cash Flows from Financing Activities: Cash Flows from Financing Activities [Abstract] Net Cash Provided by (Used in) Financing Activities [Abstract] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash Flows from Investing Activities: Cash Flows from Investing Activities [Abstract] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash Flows from Operating Activities: Cash Flows from Operating Activities [Abstract] Net income (loss) Net income (loss) Net income (loss) Net income (loss) Allocation of net income Net Income (Loss) Available to Common Stockholders, Basic Net investment income Net investment income Investment income, net of investment expenses Net Premiums Written, Net Installment payment fees Insurance Commissions and Fees Notes payable to subsidiary Notes Payable Office Equipment [Member] Office Equipment [Member] Valuation allowance related to the portion of operating loss carryforwards Operating Loss Carryforwards, Valuation Allowance Total revenues Revenues Revenues [Abstract] Revenues Other, net Other Increase (Decrease) in Other Operating Assets and Liabilities, Net Unrealized gain (loss) on securities: OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract] Other comprehensive income (loss), net of tax Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized holding gain (loss) arising during the period, net of income tax expense (benefit) of $1,207,804, $1,285,390 and ($12,164,443) Unrealized gain (loss) - subsidiaries OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Income tax (benefit) expense on unrealized holding (loss) gain arising during the period OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Other Payments for (Proceeds from) Other Investing Activities Other Other Liabilities Due from affiliate Paid related to [Abstract] Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Net outstanding liabilities Liability for losses and loss expenses Assumed Liability for Unpaid Claims and Claims Adjustment Expense Cash dividends paid Payments of Dividends Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Premiums receivable Premiums Receivable, Net Premiums receivable Increase (Decrease) in Premiums Receivable Prepaid reinsurance premiums Prepaid Reinsurance Premiums Prepaid reinsurance premiums Increase (Decrease) in Prepaid Reinsurance Premiums Issuance of common stock Proceeds from Issuance of Common Stock Available for sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale Held to maturity Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Cash from option exercises Proceeds from Stock Options Exercised Property and equipment, Gross Property, Plant and Equipment, Gross Property and equipment, net Property and equipment Property and equipment, Net Property, Plant and Equipment, Net Property and Equipment [Abstract] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Held to maturity Payments to Acquire Held-to-Maturity Securities Net purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Reinsurance Accounting and Reporting Reinsurance Accounting Policy [Policy Text Block] Reinsurance [Abstract] Losses and loss expenses Policyholder Benefits and Claims Incurred, Assumed Losses and loss expenses Losses and loss expenses Policyholder Benefits and Claims Incurred, Ceded Liability for losses and loss expenses Liability for losses and loss expenses Ceded Premiums Payable Reinsurance receivable Increase (Decrease) in Reinsurance Recoverable Related and Nonrelated Parties [Domain] Related Party Transaction [Line Items] Transactions with Affiliates Related Party Transactions Disclosure [Text Block] Related Party Transaction [Table] Net balance at January 1 Net balance at end of period Liability for Unpaid Claims and Claims Adjustment Expense, Net Cumulative effect of adoption of updated accounting guidance for credit losses at January 1 Retained earnings Retained Earnings (Accumulated Deficit) Net premiums earned Net premiums earned (includes affiliated reinsurance of $239,521,005, $237,903,029 and $232,105,306 - see note 3) Net premiums earned Revenue Recognition Revenue [Policy Text Block] Statutory Net Income, Capital and Surplus and Dividend Restrictions Dividend Payment Restrictions [Text Block] Property and Equipment Property, Plant and Equipment [Table Text Block] Summary of Insurance Subsidiaries' Liability for Losses and Loss Expenses Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Current year Current Year Claims and Claims Adjustment Expense Prior years Prior Year Claims and Claims Adjustment Expense Segment Information Segment Reporting Disclosure [Text Block] Financial Data by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Segment Reporting Information [Line Items] Schedule of Segment Reporting Information, by Segment [Table] Unrecognized compensation expense related to nonvested share-based compensation granted under the plan Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Number of options outstanding (in shares) Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding Number of shares available for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Shares available for future option grants (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Weighted-average grant date fair value of options granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Outstanding beginning balance (in shares) Outstanding ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Outstanding beginning balance (in dollars per share) Outstanding ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Number of options exercisable (in shares) Number of options exercisable (in shares) Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Expected dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Fair value of risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Award Type [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Summary of Information about Stock Options Outstanding Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Short-Term investments [Member] Short-Term Investments [Member] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Consolidated Statements of Cash Flows [Abstract] Statements of Comprehensive Income (Loss) Statement of Comprehensive Income [Abstract] Consolidated Statement of Stockholders' Equity [Abstract] State Insurance Regulatory Authorities Statutory Accounting Practices, Jurisdiction [Domain] Statutory capital and surplus Statutory capital and surplus of insurance subsidiaries Statutory net income (loss) Statutory net income (loss) of insurance subsidiaries Statutory Accounting Practices, Statutory Net Income Amount Statutory Accounting Practice, Jurisdiction [Axis] Statutory Accounting Practices [Line Items] Statutory Accounting Practices [Table] Stockholders' Equity Equity, Attributable to Parent [Abstract] Stockholders' Equity [Abstract] Stockholders' Equity Subsequent Event Type [Axis] Subsequent Event Type [Domain] Amortization of Deferred Policy Acquisition Costs SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost Net Losses and Loss Expenses SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses Deferred Policy Acquisition Costs SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost Liability For Losses and Loss Expenses SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense Net Investment Income SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income Other Underwriting Expenses SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense Other Policy Claims and Benefits Payable Net Premiums Earned SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue Net Premiums Written SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Written Title Insurance Product Line [Member] Title Insurance Product Line [Member] Obligations of States and Political Subdivisions [Member] US States and Political Subdivisions Debt Securities [Member] U.S. Treasury Securities and Obligations of U.S. Government Corporations and Agencies [Member] US Treasury and Government [Member] GAAP underwriting income (loss) Underwriting Income (Loss) Number of shares used in diluted computation (in shares) Weighted Average Number of Shares Outstanding, Diluted Director and employee stock options (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Number of shares used in basic computation (in shares) Weighted-average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Common Stock [Member] Property and Equipment Long-Lived Tangible Asset [Domain] Real Estate [Member] Land, Buildings and Improvements [Member] Software [Member] Software and Software Development Costs [Member] Cash Cash Cash at end of year Cash at beginning of year Corporate Securities [Member] Debt Security, Corporate, US [Member] Due in one year or less, amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Due after one year through five years, amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Due after five years through ten years, amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Due after ten years, amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Mortgage-backed securities, amortized cost Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Due in one year or less, estimated fair value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One 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 One Through Five Due after five years through ten years, estimated fair value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Due after ten years, estimated fair value Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Mortgage-backed securities, estimated fair value Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Available For Sale [Abstract] Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Available For Sale [Abstract] Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] Available for sale, at fair value (amortized cost $652,564,965 and $629,727,513) Available for sale, estimated fair value Available for sale, at fair value Total available for sale, estimated fair value Debt Securities, Held-to-Maturity [Table] Other [Member] Other Debt Obligations [Member] Held To Maturity [Abstract] Debt Securities, Held-to-Maturity, Fair Value, Maturity [Abstract] Held to maturity, estimated fair value Held to maturity, fair value Total held to maturity, estimated fair value Due in one year or less, estimated fair value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Due after one year through five years, estimated fair value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Due after five years through ten years, estimated fair value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Due after ten years, estimated fair value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10 Mortgage-backed securities, estimated fair value Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value Total assets Assets Collateral pledged at carrying value Financing Receivable, before Allowance for Credit Loss Effect of Reinsurance on Premiums Written [Abstract] Premiums Written, Net [Abstract] Net Investment Income, consisting Primarily of Interest and Dividends Investment Income [Table Text Block] Investment income Investment Income, Interest and Dividend Financial Instruments [Domain] Effect of Reinsurance on Premiums Earned [Abstract] Premiums Earned, Net [Abstract] Other, net Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount Statement [Table] Investments in the fair value hierarchy Investments, Fair Value Disclosure Assets Assets [Abstract] Statement [Line Items] Statement [Line Items] Numerator: [Abstract] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Line Items] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) [Member] Statutory Net Income, Capital and Surplus and Dividend Restrictions [Abstract] Fair Value Measurements Total Reinsurance [Abstract] Premiums Written and Earned [Abstract] Class of Stock [Domain] Class of Stock [Domain] Treasury stock, at cost Treasury Stock, Value Supplementary Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Fixed Maturities [Member] Fixed Maturities [Member] Fixed Maturities [Member] Available for sale Payments to Acquire Debt Securities, Available-for-Sale Available for sale Proceeds from Sale of Debt Securities, Available-for-Sale Class A Common Stock [Member] Class A Common Stock [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Property and Equipment [Abstract] Property, Plant and Equipment, Net, by Type [Abstract] Class of Treasury Stock [Table] Equity, Class of Treasury Stock [Line Items] Deferred income taxes Increase (Decrease) in Deferred Income Taxes Other, net Other Cost and Expense, Operating Operating expenses Basic earnings (loss) per share: [Abstract] Net income (loss) per share: Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Diluted earnings (loss) per share [Abstract] Diluted earnings (loss) per common share: Earnings Per Share, Diluted [Abstract] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Earnings per Share Earnings Per Share, Policy [Policy Text Block] Equity Method Investment [Table] Debt Securities, Available-for-sale [Line Items] Schedule of Held-to-Maturity Securities [Line Items] Schedule of Equity Method Investments [Line Items] Class of Stock [Axis] Unearned premium Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Unearned Premiums Reserve Unearned premiums Unearned Premiums Unearned Premiums SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Unearned Premium Property, Plant and Equipment [Table] Reinsurance balances payable Reinsurance Payable Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Long-Lived Tangible Asset [Axis] Property, Plant and Equipment [Line Items] Net Investment Income [Abstract] Net Investment Income [Abstract] Total stockholders' equity Stockholders' equity Ending balance Beginning balance Equity, Attributable to Parent Net unrealized losses Deferred Tax Asset, Debt Securities, Trading, Unrealized Loss Deferred Tax Assets [Abstract] Deferred Tax Liabilities [Abstract] Income tax expense (benefit) (includes $36,603, $470,860 and $205,794 income tax benefit from reclassification items) Income tax expense (benefit) Income tax benefit Income tax expense (benefit) Unearned premiums Increase (Decrease) in Unearned Premiums Held To Maturity [Abstract] Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract] Due in one year or less, amortized cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One Due after one year through five years, amortized cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five Due after five years through ten years, amortized cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 5 through 10 Due after ten years, amortized cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year 10 Mortgage-backed securities, amortized cost Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date Preferred stock, $.01 par value, authorized 2,000,000 shares; none issued Preferred Stock, Value, Issued Other Other Income Gain (Loss) on Securities [Line Items] Segment expenses: Expenses Expenses [Abstract] Total expenses Benefits, Losses and Expenses Equity Components [Axis] Additional Paid-In Capital [Member] Retained Earnings [Member] Accumulated Net Unrealized Investment Losses [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Accumulated Other Comprehensive Income (Loss) [Member] Equity Component [Domain] Net investment (gains) losses Net investment gains (losses) Investment gains (losses) Net investment gains (losses) (includes ($174,302), ($2,242,190) and ($979,972) accumulated other comprehensive income reclassification) Borrowings Long-Term Debt [Text Block] Issuance of common stock (stock compensation plans) Stock Issued During Period, Value, New Issues Stock-based compensation Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Issuance of common stock (stock compensation plans) (in shares) Stock Issued During Period, Shares, New Issues Stock-based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Shares issued (in shares) Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Segments [Axis] Stock repurchased (in shares) Allocation of net income Net Income (Loss) Available to Common Stockholders, Diluted Coverage under catastrophic occurrence Loss from Catastrophes Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options [Abstract] Cash dividends Dividends, Common Stock Ending balance (in shares) Beginning balance (in shares) Shares, Issued Weighted-average shares effect of dilutive securities [Abstract] Earnings Per Share [Abstract] Earnings Per Share [Text Block] Denominator: [Abstract] Denominator: [Abstract] Weighted Average Number of Shares Outstanding, Diluted [Abstract] Class of Stock [Abstract] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustments [Abstract] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Net adjustments Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Reinsurance Reinsurance [Text Block] Accrued expenses Accrued Liabilities Cash dividends declared to stockholders Dividends Payable Federal income taxes payable Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Real Estate [Member] Automobiles [Member] Automobiles [Member] Shares Granted or Issued, Share-based Payment Arrangement [Abstract] Income (loss) before income tax expense (benefit) Income (loss) before income tax expense (benefit) Income (loss) before income tax benefit and equity in undistributed net income (loss) of subsidiaries Numerator: [Abstract] Net Income (Loss) Attributable to Parent, Diluted [Abstract] Segments [Domain] Operating Segments [Member] Operating Segments [Member] Financial Data by Segment [Abstract] Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract] Measurement Frequency [Domain] Fair Value Hierarchy and NAV [Domain] Other Other Assets Recurring Basis [Member] Increase in allowance for credit losses Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease) Investments [Abstract] Fair Value Hierarchy and NAV [Axis] Measurement Frequency [Axis] Deferred Tax Assets and Deferred Tax Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Provision for Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Reconciliation of Federal Income Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Investments in Available-for-Sale Fixed Maturity and Equity Securities Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Income Taxes [Abstract] Fair Value Measurements [Abstract] Net Income Taxes and Interest Paid Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Borrowings [Abstract] Total available for sale, amortized cost Available for sale, amortized cost Debt Securities, Available-for-Sale, Amortized Cost Schedule of Gain (Loss) on Securities [Table] Schedule of Gain (Loss) on Securities [Table] Stock Compensation Plans Compensation and Employee Benefit Plans [Text Block] Summary of Plan Activity Schedule of Share-Based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] Information Regarding Activity in Stock Option Plans Share-Based Payment Arrangement, Option, Activity [Table Text Block] Stock Compensation Plans [Abstract] Allowance for Expected Credit Losses Grant of stock options APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition Use of Estimates Use of Estimates, Policy [Policy Text Block] Deferred costs Deferred Costs Fixed Maturities with Unrealized Losses Unrealized Gain (Loss) on Investments [Table Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Gross Investment Gains and Losses before Applicable Income Taxes Realized Gain (Loss) on Investments [Table Text Block] Impact of New Accounting Standards [Abstract] Summary of Significant Accounting Policies [Abstract] Segment Information [Abstract] Transactions with Affiliates [Abstract] Guaranty Fund and Other Insurance-Related Assessments [Abstract] Accounts receivable - securities Accounts Receivable from Securitization Authority to purchase shares (in shares) Share Repurchase Program, Remaining Authorized, Number of Shares Accounting Standards Update [Domain] Supplementary Cash Flow Information [Abstract] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Reconciliation of Numerators and Denominators Used in Basic and Diluted Per Share Computations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Investments [Domain] Exercise price (in dollars per share) Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price Amortized Cost and Estimated Fair Value of Fixed Maturities by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Accounting Standards Update [Axis] Organization and Business Basis of Accounting, Policy [Policy Text Block] Shares issued price (in dollars per share) Share Price Financial Instrument [Axis] Weighted Average Exercise Price [Abstract] Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in dollars per share) Forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Expired (in dollars per share) Plan Name [Axis] Plan Name [Domain] Award Type [Axis] Subsequent Event [Member] Subsequent Event [Member] Impact of New Accounting Standards Federal Home Loan Bank of Stock Purchased, Collateral Pledged and Assets Related [Abstract] Federal Home Loan Bank Stock and Federal Reserve Bank Stock [Abstract] Reclassification Reclassification, Comparability Adjustment [Policy Text Block] Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Credit Facility [Axis] Credit Facility [Domain] Estimated useful life Weighted-average remaining contractual life Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Expected life Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Exercisable period of stock options Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Weighted average period of unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Percentage of purchase price of shares Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Impact of New Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Number of operating segments Number of Operating Segments Number of reportable segments Net unrealized losses arising prior to reclassification date OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment and Tax Reclassification of held-to-maturity transfer Net unrealized losses after adjustment OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax Other comprehensive income (loss) Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Fair Value Measurement Inputs and Valuation Techniques [Abstract] Investment Type [Axis] Schedule of Investments [Table] Schedule of Investments [Line Items] Property Insurance [Member] Direct Direct Premiums Earned Premiums earned Premiums earned Ceded Ceded Premiums Earned Assumed Premiums earned Premiums and losses related to certain products Percentage of assumed premiums earned to net premiums earned Effects of Reinsurance [Table] Effects of Reinsurance [Table] Effects of Reinsurance [Line Items] Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs [Text Block] Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs [Table Text Block] Reinsurance receivable (net of allowance for expected credit losses of $391,432 and $1,394,074) Balance at end of period Balance at beginning of period Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments Reinsurance recoverable Reinsurance Recoverables, Gross Reinsurance receivable, allowance for expected credit losses Balance at beginning of period Balance at end of period Reinsurance Receivable, Net of Allowance for Expected Credit Losses [Abstract] Award Date [Axis] Award Date [Domain] Related Party Transaction [Axis] Related Party Transaction [Domain] Variable Rate [Axis] Variable Rate [Domain] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification adjustment for losses included in net income (loss), net of income tax benefit of $36,603, $470,860 and $205,794 Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Income tax (benefit) expense on reclassification adjustment for losses (gains) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Available for sale, gross unrealized losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Available for sale, gross unrealized gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Held to maturity, gross unrealized losses Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Held to maturity, gross unrealized gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Federal Home Loan Bank, Advances, Option [Axis] Federal Home Loan Bank, Advances, Option [Domain] Federal home loan bank, cash advance at fixed rate advances Federal Home Loan Bank, Advances, Fixed Rate Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Less reinsurance recoverable Plus reinsurance recoverable Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Total incurred Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Deferred tax asset, net Deferred Income Tax Assets, Net Losses and loss expenses Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Incurred and Paid Claims Development, Net of Reinsurance, Cumulative Claim Frequency and Total of IBNR Reserves Plus Expected Development on Reported Claims Short-Duration Insurance Contracts, Claims Development [Table Text Block] Short-duration Insurance Contracts, Claims Development [Table] Short-duration Insurance Contracts, Accident Year [Axis] Short-duration Insurance Contracts, Accident Year [Domain] 2015 [Member] Short-Duration Insurance Contracts, Accident Year 2015 [Member] 2016 [Member] Short-Duration Insurance Contracts, Accident Year 2016 [Member] Claims Development [Line Items] Incurred claims and allocated claim adjustment expenses, net of reinsurance Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net Cumulative paid claims and allocated claim adjustment expenses, net of reinsurance Liabilities for claims and claims adjustment expenses, net of reinsurance Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net Cumulative number of reported claims All outstanding liabilities before 2015, net of reinsurance Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented Reconciliation of Net Incurred and Paid Claims Development Tables to Liability for Claims and Claim Adjustment Expenses Short-Duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table Text Block] Supplementary Information about Average Historical Claims Duration Short-Duration Insurance Contracts, Schedule of Historical Claims Duration [Table Text Block] Average annual percentage payout of incurred claims by age, net of reinsurance, year 1 Average annual percentage payout of incurred claims by age, net of reinsurance, year 2 Average annual percentage payout of incurred claims by age, net of reinsurance, year 3 Average annual percentage payout of incurred claims by age, net of reinsurance, year 4 Average annual percentage payout of incurred claims by age, net of reinsurance, year 5 Average annual percentage payout of incurred claims by age, net of reinsurance, year 6 Average annual percentage payout of incurred claims by age, net of reinsurance, year 7 Average annual percentage payout of incurred claims by age, net of reinsurance, year 8 Average annual percentage payout of incurred claims by age, net of reinsurance, year 9 Average annual percentage payout of incurred claims by age, net of reinsurance, year 10 Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net [Abstract] Total IBNR plus expected development on reported claims Treasury Stock [Member] Treasury stock (in shares) Other Net increase (decrease) in cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash at beginning of year Cash at end of year Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Tax benefit for tax deductions related to option exercises Share-Based Payment Arrangement, Exercise of Option, Tax Benefit Lease income Operating Lease, Lease Income 2017 [Member] Short-Duration Insurance Contracts, Accident Year 2017 [Member] Lease agreement term Lessee, Operating Lease, Term of Contract Stock options Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount Less than 12 months, unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss More than 12 months, unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Marketable Securities [Table] Marketable Securities [Line Items] Other [Member] Product and Service, Other [Member] Debt Securities, Available-for-Sale [Table] Less than 12 months, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months More than 12 months, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Cost Gross unrealized gains on equity securities Gross gains Gross unrealized losses on equity securities Gross losses Equity Securities, FV-NI, Unrealized Loss Sales or transfers, held to maturity Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Transfer, Amount 2018 [Member] Short-Duration Insurance Contracts, Accident Year 2018 [Member] Workers' Compensation Insurance [Member] Liability Insurance [Member] ASU 2016-13 [Member] Held-to-Maturity Fixed-Maturity Securities Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Table Text Block] Reinsurance Receivable Allowance for Expected Credit Losses [Abstract] Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward] Current period change for expected credit losses Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Period Increase (Decrease) Current period change for expected credit losses Reinsurance Recoverable, Allowance for Credit Loss, Period Increase (Decrease) Held to maturity, allowance for credit loss Balance at beginning of period Balance at end of period Held to maturity, allowance for expected credit losses Allowance for Expected Credit Losses [Abstract] Allowance for Expected Credit Losses [Abstract] Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward] SOFR [Member] 2019 [Member] Short-Duration Insurance Contract, Accident Year 2019 [Member] 2020 [Member] Short-Duration Insurance Contract, Accident Year 2020 [Member] Accounting Standards Update [Extensible Enumeration] Pledged Status [Axis] Pledged Status [Domain] Held to maturity, amortized cost Total held to maturity, carrying value Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss Held-to-Maturity, Net of Allowance for Expected Credit Losses [Abstract] Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss [Abstract] Equity securities, at fair value Estimated fair value 2021 [Member] Short-Duration Insurance Contract, Accident Year 2021 [Member] Asset Pledged as Collateral without Right [Member] Purchases of equity securities Payments to Acquire Equity Securities, FV-NI Sales of equity securities Proceeds from Sale of Equity Securities, FV-NI Additional coverage amount Reinsurance, Excess Retention, Amount Reinsured, Per Event 2022 [Member] 2023 [Member] 2024 [Member] 2024 [Member] Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Other Segment Reporting, Other Segment Item, Amount SCHEDULE III - SUPPLEMENTARY INSURANCE INFORMATION SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Table] Affiliated Entity [Member] Affiliated Entity [Member] Parent Company [Member] DGI Parent [Member] Condensed Financial Information of Parent Company [Abstract] SCHEDULE III - SUPPLEMENTARY INSURANCE INFORMATION [Abstract] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Maximum [Member] Minimum [Member] Minimum [Member] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Condensed Balance Sheets Condensed Balance Sheet [Table Text Block] Condensed Statements of Income (Loss) and Comprehensive Income (Loss) Condensed Statements of Cash Flows Condensed Cash Flow Statement [Table Text Block] Condensed Balance Sheet Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Consolidation Items [Axis] Consolidation Items [Domain] Condensed Balance Sheet Statement [Table] FHLB of Pittsburgh [Member] Federal Home Loan Bank of Pittsburgh [Member] Condensed Cash Flow Statement [Table] Condensed Income Statement [Table] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Product and Service [Domain] Product and Service [Axis] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption, Adjustment [Member] Cybersecurity Risk Management, Strategy, and Governance [Abstract] Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] Cybersecurity Risk Management Processes Integrated [Flag] Cybersecurity Risk Management Processes Integrated [Text Block] Cybersecurity Risk Management Third Party Engaged [Flag] Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block] Cybersecurity Risk Board of Directors Oversight [Text Block] Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] Cybersecurity Risk Role of Management [Text Block] Cybersecurity Risk Management Positions or Committees Responsible [Flag] Cybersecurity Risk Management Positions or Committees Responsible [Text Block] Cybersecurity Risk Management Expertise of Management Responsible [Text Block] Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] Cover [Abstract] Document Type Document Annual Report Document Transition Report Document Financial Statement Error Correction [Flag] Entity Interactive Data Current Amendment Flag ICFR Auditor Attestation Flag Document Fiscal Year Focus Document Fiscal Period Focus Document Period End Date Legal Entity [Axis] Entity [Domain] Entity Registrant Name Entity Central Index Key Entity File Number Entity Tax Identification Number Entity Incorporation, State or Country Code Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Shell Company Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Public Float 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 Entity Listings [Table] Entity Listings [Line Items] Title of 12(b) Security Trading Symbol Security Exchange Name Entity Common Stock, Shares Outstanding Auditor Name Auditor Firm ID Auditor Location Information by type of related party unaffiliated entity. Unaffiliated Entity [Member] Unaffiliated Entity [Member] Reconciliation of Statutory Filings to Amounts Reported in the Consolidated Financial Statements [Abstract] The entire disclosure of reconciliation of statutory filings to amounts reported in the consolidated financial statements. Reconciliation of Statutory Filings to Amounts Reported in the Consolidated Financial Statements [Text Block] Reconciliation of Statutory Filings to Amounts Reported in the Consolidated Financial Statements Liability for Losses and Loss Expenses [Abstract] The entire disclosure for liability for losses and loss expenses. Liability For Losses And Loss Expenses [Text Block] Liability for Losses and Loss Expenses Investment [Abstract] Investments Investments [Abstract] Fixed Maturities Investments [Abstract] Fixed maturities Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments at cost, which approximates fair value. Short-term Investments at Cost Short-term investments, at cost, which approximates fair value Short-term investments Statutory Accounting Practices [Abstract] Insurance subsidiary, Atlantic States Insurance Company ("Atlantic States"). Atlantic States [Member] Atlantic States [Member] An insurance subsidiary, Southern Insurance Company of Virginia ("Southern"). Southern [Member] Southern [Member] Refers to an insurance subsidiary. Michigan Insurance Company [Member] MICO [Member] The amount of statutory unassigned (deficit) surplus as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country. Statutory Accounting Practices Statutory Unassigned Deficit Surplus Statutory unassigned surplus An insurance subsidiary, the Peninsula Insurance Company and Peninsula Indemnity Company (collectively, "Peninsula"). Peninsula [Member] Peninsula [Member] Homeowners is material lines of business of insurance subsidiary. Homeowners [Member] Homeowners [Member] Commercial multi-peril is material lines of business of insurance subsidiary. Commercial MultiPeril [Member] Commercial Multi-Peril [Member] Commercial automobile is material lines of business of insurance subsidiary. Commercial Automobile [Member] Commercial Automobile [Member] Workers compensation is material lines of business of insurance subsidiary. Workers Compensation [Member] Workers Compensation [Member] Personal automobile is material lines of business of insurance subsidiary. Personal Automobile [Member] Personal Automobile [Member] Short-duration Insurance Contracts, Historical Claims Duration [Abstract] Short-duration Insurance Contracts, Historical Claims Duration [Abstract] The amount of workers' compensation and retention amount for workers' compensation losses. Workers' Compensation and Retention Amount Workers' compensation and retention amount The retention amount of Catastrophe reinsurance agreement contracts. Catastrophe Reinsurance Agreement Contracts Retention Amount Catastrophe reinsurance, set retention amount The number of reinsurance coverages. Number of Reinsurance Coverages Number of reinsurance coverages Minimum percentage of reinsurance treaty coverage. Reinsurance Treaty Coverage Percentage Minimum Percentage of reinsurer coverage The maximum amount of loss coverage under reinsurance agreement of property catastrophe. Maximum Amount of Loss Coverage Under Reinsurance Agreement of Property Catastrophe Maximum amount of loss coverage under reinsurance agreement of property catastrophe Name of the entity. Donegal Mutual [Member] Donegal Mutual [Member] The retention amount of loss reinsurance agreement contracts. Loss Reinsurance Agreement Contracts Retention Amount Loss reinsurance agreement contracts retention amount Information by reinsurer or group of third party reinsurance. Third Party Reinsurance [Member] Third Party Reinsurance [Member] Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims, after the Cumulative effect of adoption of updated accounting guidance for credit losses. Liability for Unpaid Claims and Claims Adjustment Expense, Net, After Cumulative Effect of Adoption of Updated Accounting Guidance for Credit Losses Net balance at January 1 Net balance at period end Percentage of development related to net carried reserves and resulted primarily from lower-than-expected severity in the workers' compensation and personal automobile lines of business, partially offset by higher-than-expected severity in the commercial automobile and commercial multi-peril lines of business, for accident years. Managements Assertion of Adequacy of Insurance Reserves Percentage Percentage of development Sales of Fixed Maturities [Abstract] Sales of fixed maturities: Maturity of Fixed Maturities [Abstract] Maturity of fixed maturities: Purchases of Fixed Maturities [Abstract] Purchases of fixed maturities: Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to proration. Income Tax Reconciliation Proration Proration Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding, Number [Abstract] Number of Options [Abstract] Agency Stock Purchase Plan [Abstract] Number of periods considered to arrive at average price to issue common stock, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Number of Periods Considered to Arrived at Average Price to Issue Common Stock Number of trading days of subscription period Share based compensation arrangement by share based payment award maximum amount of subscription per period. Share Based Compensation Arrangement by Share Based Payment Award Maximum Amount of Subscription per Period Investment on per subscription Information by plan name for agency stock purchase plan adopted in 2021. Agency Stock Purchase Plan 2021 [Member] New Plan [Member] Information by plan name for agency stock purchase plan. Agency Stock Purchase Plan [Member] Agency Stock Purchase Plan [Member] The minimum percentage of excess class A common stock dividend over class B dividend for declaration and payment of cash dividends. Minimum Percentage of Excess Class A Common Stock Dividend Over Class B Dividend Minimum percentage of class A common stock declared dividend excess over class B dividend Increase (Decrease) of Statutory Net Income (Loss) of Insurance Subsidiaries [Abstract] Increases (Decreases): [Abstract] The increase (decrease) in salvage and subrogation recoverable. Increase (Decrease) in Salvage and Subrogation Recoverable Salvage and subrogation recoverable The increase decrease in consolidation eliminations and adjustments. Increase (Decrease) in Consolidation Eliminations and Adjustments Consolidating eliminations and adjustments Increase (decrease) in parent only net income reported in the entity. Increase (Decrease) in Parent only Net Income Parent-only net income (loss) The increase (decrease) in deferred federal income taxes. Increase (Decrease) in Deferred Federal Income Taxes Deferred federal income taxes Statutory Capital and Surplus of Insurance Subsidiaries [Abstract] Statutory capital and surplus reconciliation, deferred federal income taxes. Statutory Capital And Surplus Reconciliation Deferred Federal Income Taxes Deferred federal income taxes Statutory capital and surplus reconciliation, salvage and subrogation recoverable. Statutory Capital and Surplus Reconciliation Salvage and Subrogation Recoverable Salvage and subrogation recoverable Statutory capital and surplus deficit reconciliation, fixed maturities. Statutory Capital and Surplus Deficit Reconciliation, Fixed Maturities Fixed maturities Statutory capital and surplus reconciliation, non admitted assets and other adjustments. Statutory Capital and Surplus Reconciliation Non Admitted Assets and Other Adjustments Non-admitted assets and other adjustments, net Statutory capital and surplus reconciliation, parent-only equity and other adjustments. Statutory Capital And Surplus Reconciliation Equity And Other Adjustments Parent-only equity and other adjustments The number of securities classified as available for sale in unrealized loss position held by the entity. Number of Securities Classified as Available for Sale in Unrealized Loss Position Number of fixed maturity securities classified as available for sale The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. Impairment of Investment Impairment losses Debt Securities, Fair Value and Unrealized Losses by Fixed Maturities [Abstract] Reconciliation of Net Incurred and Paid Claims Development [Abstract] Reconciliation of Net Incurred and Paid Claims Development [Abstract] Name of the entity. Donegal Mutual Insurance Company [Member] Donegal Mutual [Member] Donegal Mutual Insurance Company [Member] Reinsurance Pooling and Other Reinsurance Arrangements [Abstract] Reinsurance Pooling and Other Reinsurance Arrangements [Abstract] The percentage of share in results of pooled business owned by third party. Percentage of Share in Results of Pooled Business Owned by Third Party Percentage of share in results of pooled business owned by third party The percentage of share in results of pooled business subsidiary. Percentage of Share in Results of Pooled Business Subsidiary Percentage of share in results of pooled business subsidiary Transactions with Affiliates, Lease Agreement [Abstract] Lease Agreement [Abstract] The percentage of premium and losses related to reinsurance Percentage of Premium and Losses Related to Reinsurance Premiums and losses related to business of MICO Pledged assets separately reported assets pledged as collateral at par. Pledged Assets Separately Reported Assets Pledged As Collateral At Par Collateral pledged, at par (carrying value $40,655,374) Information by name of manufacturers and traders trust company. Manufacturers And Traders Trust Company [Member] Manufacturers and Traders Trust Company [Member] Investment function or financial market that are based on various asset types, industries, or investment strategies. Investments Function Segment [Member] Investments [Member] The amount of GAAP adjustments related to underwriting (income) loss. GAAP Adjustments Related to Underwriting (Income) Loss GAAP adjustments The commercial lines products of our insurance subsidiaries consist primarily of commercial automobile, commercial multi-peril and workers' compensation policies. Commercial Lines Segment [Member] Commercial Lines [Member] The personal lines products of our insurance subsidiaries consist primarily of homeowners and private passenger automobile policies. Personal Lines Segment [Member] Personal Lines [Member] The amount of statutory accounting practices underwriting income (loss). Statutory Accounting Practices Underwriting Income (Loss) SAP underwriting income (loss) Amount of segment revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Segment Reporting Revenues Total segment revenues Tabular disclosure of subsidiaries insurance ceded pursuant to reinsurance agreements. Schedule of Subsidiaries Insurance Ceded Pursuant to Reinsurance Agreements [Table Text Block] Schedule of Insurance Subsidiaries Ceded to Donegal Mutual Pursuant to these Reinsurance Agreements Tabular disclosure of effect of affiliated reinsurance transactions on net losses and loss expenses insurance subsidiaries incurred. Schedule of Effect of Affiliated Reinsurance Transactions on Net Losses and Loss Expenses Insurance Subsidiaries Incurred [Table Text Block] Schedule of Effect of Affiliated Reinsurance Transactions on Net Losses and Loss Expenses Insurance Subsidiaries Incurred Tabular disclosure of reinsurance ceded to pool. Schedule of Reinsurance Ceded to Pool [Table Text Block] Schedule of Reinsurance Atlantic States Ceded to Pool Tabular disclosure of effect of affiliated reinsurance transactions on net premiums of subsidiaries earned. Schedule of Effect of Affiliated Reinsurance Transactions on Net Premiums of Subsidiaries Earned [Table Text Block] Schedule of Effect of Affiliated Reinsurance Transactions on Net Premiums of Subsidiaries Earned Tabular disclosure of reinsurance assumed from pool. Schedule of Reinsurance Assumed from Pool [Table Text Block] Schedule of Reinsurance Atlantic States Assumed from Pool Tabular disclosure of reinsurance ceded pursuant to share repurchase agreements. Schedule of Reinsurance Ceded Pursuant to Share Repurchase Agreements [Table Text Block] Schedule of Reinsurance Ceded to Donegal Mutual Pursuant to these Quota-Share Reinsurance Agreements Transactions with Affiliates, Expense Sharing [Abstract] Expense Sharing [Abstract] Infrastructure related costs allocated to insurance subsidiaries. Infrastructure Related Costs Allocated To Insurance Subsidiaries Infrastructure related costs allocated Proportionate share of the remaining infrastructure costs. Proportionate Share of Remaining Infrastructure Costs Proportionate share of the remaining infrastructure costs Amortized Cost and Estimated Fair Values of Fixed Maturities [Abstract] Amortized Cost and Estimated Fair Values of Fixed Maturities [Abstract] Reinsurance premiums earned. Reinsurance Premiums Earned Net premiums earned - affiliated reinsurance Net Insurance subsidiaries. Insurance Subsidiaries [Member] Insurance Subsidiaries [Member] Tabular disclosure of cost and estimated fair value of equity securities. Schedule of Cost and Estimated Fair Value of Equity Securities [Table Text Block] Cost and Estimated Fair Values of Equity Securities Tabular disclosure of amortized cost and estimated fair value of fixed maturities securities. Schedule of Amortized Cost and Estimated Fair Value of Fixed Maturities Securities [Table Text Block] Amortized Cost and Estimated Fair Values of Fixed Maturities Net Gains and Losses from Investments [Abstract] Net Gains and Losses from Investments [Abstract] Amount of gross realized loss on investment. Gross Realized Loss on Investments Gross realized losses Amount of gross realized gain on investment. Gross Realized Gain on Investments Gross realized gains The amount of change in difference between fair value and cost of investments during the reporting period. Change in Difference Between Fair Value and Cost of Investments Change in difference between fair value and cost of investments Amount of gross realized gain/losses on investment. Gross Realized Gain/Loss on Investments Net realized gains (losses) Income Tax Description [Abstract] Income Taxes [Abstract] The tabular disclosure of reconciliations of statutory net income (loss) and capital and surplus to the net income (loss) and stockholders' equity amounts. Reconciliations of Statutory Net Income (Loss) and Capital and Surplus [Table Text Block] Reconciliations of Statutory Net Income (Loss) and Capital and Surplus Amount of income (loss) of subsidiary attributable to the equity in undistributed net income of subsidiaries. Equity in Undistributed Net Income of Subsidiaries Equity in undistributed net income (loss) of subsidiaries Amount of dividend represents a return on a parent's investment in a subsidiary of dividends from subsidiaries and affiliates. Dividends from Subsidiaries and Affiliates Dividends from subsidiaries Amount of income (loss) from continuing operations before deduction of income (loss) attributable to income (loss) from equity method investments. Income Loss from Continuing Operations before Income Loss from Equity Method Investments Income (loss) before equity in undistributed net income (loss) of subsidiaries Statements of Comprehensive Income [Abstract] Statements of Comprehensive Income (Loss) [Abstract] Refers to acquired business entity. Le Mars [Member] Le Mars [Member] Name of the reinsurance. Catastrophe Reinsurance [Member] Catastrophe Reinsurance [Member] Tabular disclosure of effect of reinsurance on premiums written. Schedule of Effect of Reinsurance on Premiums Written [Table Text Block] Amounts Represent Effect of Reinsurance on Premiums Written Tabular disclosure of reinsurance ceded transactions with unaffiliated reinsurers. Schedule of Reinsurance Ceded Transactions With Unaffiliated Reinsurers [Table Text Block] Ceded Reinsurance Transactions with Unaffiliated Reinsurers Tabular disclosure of effect of reinsurance on premiums earned. Schedule of Effect of Reinsurance on Premiums Earned [Table Text Block] Amounts Represent Effect of Reinsurance on Premiums Earned Tabular disclosure of reinsurance ceded transactions with both affiliated and unaffiliated reinsurers. Schedule of Reinsurance Ceded Transactions With Both Affiliated and Unaffiliated Reinsurers [Table Text Block] Total Ceded Reinsurance Transactions with both Affiliated and Unaffiliated Reinsurers Tabular disclosure of federal home loan bank borrowing capacity. Federal Home Loan Bank of Stock Purchased, Collateral Pledged and Assets Related [Table Text Block] FHLB of Stock Purchased, Collateral Pledged and Assets Related Amount of deferred tax liability attributable to taxable temporary differences classified as loss reserve transition adjustment. Deferred Tax Liabilities Tax Loss Reserve Transition Adjustment Loss reserve transition adjustment Information by type of related party affiliated entity and unaffiliated entity. Affiliated Entity And Unaffiliated Entity [Member] Affiliated Entity and Unaffiliated Entity [Member] Supplementary Insurance Information by Segment [Abstract] Equity Incentive Plans [Abstract] Employee service share based compensation tax benefit realized from exercise of stock option. Employee Service Share Based Compensation Tax Benefit Realized from Exercise of Stock Option Tax benefit for tax deductions from option exercises Share based compensation arrangement by share based payment award number of restricted shares to issue to all directors. Share Based Compensation Arrangement by Share Based Payment Award Number of Restricted Shares to Issue to All Directors Restricted shares issued to directors (in shares) Share based compensation arrangement by share based payment award number of shares authorized to issue to employees of subsidiary and affiliates. Share Based Compensation Arrangement by Share Based Payment Award Number of Shares Authorized to Issue to Employees of Subsidiary and Affiliates Common stock available for issuance to employees of subsidiaries and affiliates under identical plan (in shares) Information by plan name for equity Incentive plan . Equity Incentive Plan [Member] Equity Incentive Plan [Member] Share based compensation arrangement by share based payment award number of shares authorized to issue to our directors and of subsidiaries and affiliates. Share Based Compensation Arrangement by Share Based Payment Award Number of Shares Authorized to Issue to our Directors and of Subsidiaries and Affiliates Common stock available for issuance to directors and those of the subsidiaries and affiliates under identical plan (in shares) Operating loss carryforwards [Abstract] Operating Loss Carryforwards [Abstract] Amount, after allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Deferred Tax Assets, Net, Other Other deferred tax assets, net Education Bonds are financial products designed specifically for saving and investing to meet lifelong education expenses for yourself, your family or others dear and important to you. Education Bond [Member] Education Bonds [Member] A revenue bond issued by a municipality to finance the building or extension of water and sewer systems. Interest and principal payments on the bond are derived from and are limited to revenues received from charges to the users of the systems. Water And Sewer Utility Bonds [Member] Water and Sewer Utility Bonds [Member] The amount of reclassification adjustment out of accumulated other comprehensive income amortization of unrecognized loss during the reporting period. Reclassification Adjustment out of Accumulated Other Comprehensive Income Amortization of Unrecognized Loss Amortization of other comprehensive loss The amount of amortized cost of bond held at balance sheet date. Amortized Cost of Bond Held Amortized cost of bond held The amount of aggregate fair value of bond held at balance sheet date. Aggregate Fair Value of Bond Held Aggregate fair value of bond held Percentage of threshold limit for investment held at balance sheet date. Threshold Limit for Investment Held Percentage of which the company held security of any issuer Percentage of different kind of bond included in investment in special revenue bonds. Percentage of Different Kind of Bond Included in Investment in Special Revenue Bonds Percentage of investments in special revenue bonds Special revenue bond means any security or other instrument, under which a payment obligation is created, issued by or on behalf of or payable or guaranteed by a governmental unit to finance a project serving a substantial public purpose, and not payable from any of the sources enumerated in subsection (p) of this section; or securities which are the functional equivalent of the foregoing issued by a not-for-profit corporation. Special Revenue Bond [Member] Special Revenue Bonds [Member] Information by date or year award under share-based payment arrangement is granted. Grant Date One [Member] December 19, 2019 [Member] Information by date or year award under share-based payment arrangement is granted. Grant Date Two [Member] December 17, 2020 [Member] Information by date or year award under share-based payment arrangement is granted. Grant Date Five [Member] February 9, 2021 [Member] Information by date or year award under share-based payment arrangement is granted. Grant Date [Member] December 18, 2014 [Member] Information by date or year award under share-based payment arrangement is granted. Grant Date Eight [Member] December 21, 2023 [Member] Information by date or year award under share-based payment arrangement is granted. Grant Date Seven [Member] December 15, 2022 [Member] Information by date or year award under share-based payment arrangement is granted. Grant Date Nine [Member] December 19, 2024 [Member] Information by date or year award under share-based payment arrangement is granted. Grant Date Four [Member] December 16, 2021 [Member] Information by date or year award under share-based payment arrangement is granted. Grant Date Three [Member] January 4, 2021 [Member] Information by date or year award under share-based payment arrangement is granted. Grant Date Six [Member] April 18, 2022 [Member] Cost and Estimated Fair Value of Equity Securities [Abstract] Cost and Estimated Fair Value of Equity Securities [Abstract] Employee Stock Purchase Plan [Abstract] The information about the shares issued dates. Issue Date Five [Member] January 1, 2024 [Member] The information about the shares issued dates. Issue Date One [Member] January 1, 2022 [Member] The information about the shares issued dates. Issue Date Six [Member] July 1, 2024 [Member] The information about the shares issued dates. Issue Date Two [Member] July 1, 2022 [Member] The information about the shares issued dates. Issue Date Three [Member] January 1, 2023 [Member] Information by plan name for employee stock purchase plan. Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] The information about the shares issued dates. Issue Date Four [Member] July 1, 2023 [Member] A program by which a company buys back its own shares from the marketplace. Stock repurchase program [Member] Stock Repurchase Program [Member] Schedule of information related to organization and business. Organization and Business [Table] Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Organization and Business [Line Items] Organization And Business [Abstract] Organization and Business [Abstract] The percentage of voting power owned by major shareholder. Percentage of Voting Power Owned by Major Shareholder Voting power percentage of outstanding common stock The percentage of stock ownership held by major shareholder. Stock Ownership Percentage Held by Major Shareholder Stock ownership percentage held by major shareholder Amount related to surcharges collected by insurance subsidiaries on behalf of regulatory authorities. Surcharge Collected by Subsidiary Surcharges collected by insurance subsidiaries Amount of Insurance subsidiaries' liabilities for guaranty fund and other insurance. Insurance Subsidiary Liability Insurance subsidiaries' liabilities for guaranty fund and other insurance The net cash paid (received) associated with the acquisition or disposal of all payments for proceeds from investment. Payments for Proceeds from Investment in Subsidiaries Investment in subsidiaries Name of the equity method investee. Donegal Financial Services Corporation [Member] Donegal Financial Services Corporation [Member] Amount of income (loss) of subsidiary attributable to the equity in undistributed net income of subsidiaries. Equity in Undistributed Net Income Loss of Subsidiaries Equity in undistributed net (income) loss of subsidiaries