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Disclosure - Impact of New Accounting Standards link:presentationLink link:calculationLink link:definitionLink 060300 - Disclosure - Transactions with Affiliates link:presentationLink link:calculationLink link:definitionLink 060400 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 060500 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 060600 - Disclosure - Deferred Policy Acquisition Costs link:presentationLink link:calculationLink link:definitionLink 060700 - Disclosure - Property and Equipment link:presentationLink link:calculationLink link:definitionLink 060800 - Disclosure - Liability for Losses and Loss Expenses link:presentationLink link:calculationLink link:definitionLink 060900 - Disclosure - Borrowings link:presentationLink link:calculationLink link:definitionLink 061000 - Disclosure - Reinsurance link:presentationLink link:calculationLink link:definitionLink 061100 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 061200 - Disclosure - Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 061300 - Disclosure - Stock Compensation Plans link:presentationLink link:calculationLink link:definitionLink 061400 - Disclosure - Statutory Net Income, Capital and Surplus and Dividend Restrictions link:presentationLink link:calculationLink link:definitionLink 061500 - Disclosure - Reconciliation of Statutory Filings to Amounts Reported in the Consolidated Financial Statements link:presentationLink link:calculationLink link:definitionLink 061600 - Disclosure - Supplementary Cash Flow Information link:presentationLink link:calculationLink link:definitionLink 061700 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 061800 - Disclosure - Condensed Financial Information of Parent Company link:presentationLink link:calculationLink link:definitionLink 061900 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 062000 - 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Disclosure - Statutory Net Income, Capital and Surplus and Dividend Restrictions (Tables) link:presentationLink link:calculationLink link:definitionLink 081500 - Disclosure - Reconciliation of Statutory Filings to Amounts Reported in the Consolidated Financial Statements (Tables) link:presentationLink link:calculationLink link:definitionLink 081600 - Disclosure - Supplementary Cash Flow Information (Tables) link:presentationLink link:calculationLink link:definitionLink 081700 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 081800 - Disclosure - Condensed Financial Information of Parent Company (Tables) link:presentationLink link:calculationLink link:definitionLink 081900 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 082100 - Disclosure - Allowance for Expected Credit Losses (Tables) link:presentationLink link:calculationLink link:definitionLink 090100 - Disclosure - Summary of Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 090200 - Disclosure - Impact of New Accounting Standards (Details) link:presentationLink link:calculationLink link:definitionLink 090300 - Disclosure - Transactions with Affiliates, Reinsurance Pooling and Other Reinsurance Arrangements (Details) link:presentationLink link:calculationLink link:definitionLink 090302 - Disclosure - Transactions with Affiliates, Reinsurance Atlantic States Ceded to Pool (Details) link:presentationLink link:calculationLink link:definitionLink 090304 - Disclosure - Transactions with Affiliates, Reinsurance Atlantic States Assumed from Pool (Details) link:presentationLink link:calculationLink link:definitionLink 090306 - Disclosure - Transactions with Affiliates, Reinsurance Ceded to Donegal Mutual Pursuant to Quota-Share Reinsurance Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 090308 - Disclosure - Transactions with Affiliates, Insurance Subsidiaries Ceded to Donegal Mutual Pursuant to Reinsurance Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 090310 - Disclosure - Transactions with Affiliates, Affiliated Reinsurance Transactions on Net Premiums of Insurance Subsidiaries Earned (Details) link:presentationLink link:calculationLink link:definitionLink 090312 - Disclosure - Transactions with Affiliates, Reinsurance Transactions on Net Losses and Loss Expenses of Insurance Subsidiaries Incurred (Details) link:presentationLink link:calculationLink link:definitionLink 090314 - Disclosure - Transactions with Affiliates, Expense Sharing (Details) link:presentationLink link:calculationLink link:definitionLink 090316 - Disclosure - Transactions with Affiliates, Lease Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 090400 - Disclosure - Investments, Amortized Cost and Estimated Fair Values of Fixed Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 090402 - Disclosure - Investments, Summary (Details) link:presentationLink link:calculationLink link:definitionLink 090404 - Disclosure - Investments, Amortized Cost and Estimated Fair Value of Fixed Maturities by Contractual Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 090406 - Disclosure - Investments, Cost and Estimated Fair Value of Equity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 090408 - Disclosure - Investments, Net Investment Income, Consisting Primarily of Interest and Dividends (Details) link:presentationLink link:calculationLink link:definitionLink 090410 - Disclosure - Investments, Gross Investment Gains and Losses before Applicable Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 090412 - Disclosure - Investments, Fixed Maturities with Unrealized Losses (Details) link:presentationLink link:calculationLink link:definitionLink 090500 - Disclosure - Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 090600 - Disclosure - Deferred Policy Acquisition Costs (Details) link:presentationLink link:calculationLink link:definitionLink 090700 - Disclosure - Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 090800 - Disclosure - Liability for Losses and Loss Expenses, Summary of Insurance Subsidiaries' Liability for Losses and Loss Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 090802 - Disclosure - Liability for Losses and Loss Expenses, Incurred Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance (Details) link:presentationLink link:calculationLink link:definitionLink 090804 - Disclosure - Liability for Losses and Loss Expenses, Cumulative Paid Claims and Allocated Claim Adjustment Expenses, Net of Reinsurance (Details) link:presentationLink link:calculationLink link:definitionLink 090806 - Disclosure - Liability for Losses and Loss Expenses, Reconciliation of Net Incurred and Paid Claims Development Tables to Liability for Claims and Claim Adjustment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 090808 - Disclosure - Liability for Losses and Loss Expenses, Supplementary Information About Average Historical Claims Duration (Details) link:presentationLink link:calculationLink link:definitionLink 090900 - Disclosure - Borrowings (Details) link:presentationLink link:calculationLink link:definitionLink 091000 - Disclosure - Reinsurance, Unaffiliated Reinsurers (Details) link:presentationLink link:calculationLink link:definitionLink 091002 - Disclosure - Reinsurance, Ceded Reinsurance Transactions with Unaffiliated Reinsurers (Details) link:presentationLink link:calculationLink link:definitionLink 091004 - Disclosure - Reinsurance, Total Ceded Reinsurance Transactions with both Affiliated and Unaffiliated Reinsurers (Details) link:presentationLink link:calculationLink link:definitionLink 091006 - Disclosure - Reinsurance, Amounts Represent Effect of Reinsurance on Premiums Written (Details) link:presentationLink link:calculationLink link:definitionLink 091008 - Disclosure - Reinsurance, Amounts Represent Effect of Reinsurance on Premiums Earned (Details) link:presentationLink link:calculationLink link:definitionLink 091100 - Disclosure - Income Taxes, Provision for Income Tax (Benefit) Expense (Details) link:presentationLink link:calculationLink link:definitionLink 091102 - Disclosure - Income Taxes, Reconciliation of Federal Income Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 091104 - Disclosure - Income Taxes, Deferred Tax Assets and Deferred Tax Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 091106 - Disclosure - Income Taxes, Operating Loss Carryforward (Details) link:presentationLink link:calculationLink link:definitionLink 091200 - Disclosure - Stockholders' Equity (Details) link:presentationLink link:calculationLink link:definitionLink 091300 - Disclosure - Stock Compensation Plans, Equity Incentive Plans (Details) link:presentationLink link:calculationLink link:definitionLink 091302 - Disclosure - Stock Compensation Plans, Information Regarding Activity in Stock Option Plans (Details) link:presentationLink link:calculationLink link:definitionLink 091304 - Disclosure - Stock Compensation Plans, Summary of Information about Stock Options Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 091306 - Disclosure - Stock Compensation Plans, Employee Stock Purchase Plan (Details) link:presentationLink link:calculationLink link:definitionLink 091308 - Disclosure - Stock Compensation Plans, Agency Stock Purchase Plan (Details) link:presentationLink link:calculationLink link:definitionLink 091400 - Disclosure - Statutory Net Income, Capital and Surplus and Dividend Restrictions (Details) link:presentationLink link:calculationLink link:definitionLink 091500 - Disclosure - Reconciliation of Statutory Filings to Amounts Reported in the Consolidated Financial Statements, (Details) link:presentationLink link:calculationLink link:definitionLink 091600 - Disclosure - Supplementary Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 091700 - Disclosure - Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 091800 - Disclosure - Condensed Financial Information of Parent Company, Condensed Balance Sheets (Details) link:presentationLink link:calculationLink link:definitionLink 091802 - Disclosure - Condensed Financial Information of Parent Company, Condensed Statements of Income (Loss) and Comprehensive Income (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 091804 - Disclosure - Condensed Financial Information of Parent Company, Condensed Statements of Cash Flows (Details) link:presentationLink link:calculationLink link:definitionLink 091900 - Disclosure - Segment Information, Reportable Segments (Details) link:presentationLink link:calculationLink link:definitionLink 091902 - Disclosure - Segment Information, Financial Data by Segment (Details) link:presentationLink link:calculationLink link:definitionLink 092000 - Disclosure - Guaranty Fund and Other Insurance-Related Assessments (Details) link:presentationLink link:calculationLink link:definitionLink 092100 - Disclosure - Allowance for Expected Credit Losses, Held-to-Maturity Fixed-Maturity Securities (Details) link:presentationLink link:calculationLink link:definitionLink 092102 - Disclosure - Allowance for Expected Credit Losses, Reinsurance Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 092400 - Schedule - SCHEDULE III - SUPPLEMENTARY INSURANCE INFORMATION (Details) link:presentationLink link:calculationLink link:definitionLink