Condensed Financial Information of Parent Company Only Disclosure [Abstract] Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Reclassifications and eliminations Consolidation, Eliminations [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Indemnity Parent Company [Member] Exchange Variable Interest Entity, Primary Beneficiary [Member] Erie Family Life Insurance Company (EFL) Erie Family Life Insurance Company [Member] Represents Erie Family Life Insurance Company ("EFL"), an affiliated life insurance company that underwrites and sells individual and group life insurance policies and fixed annuities, wholly owned by the Erie Insurance Exchange after March 31, 2011. Prior to and through March 31, 2011, Erie Indemnity Company retained a 21.6% ownership interest in EFL, and the Erie Insurance Exchange retained a 78.4% ownership interest in EFL. Consolidating Statement of Financial Position Condensed Balance Sheet Statements, Captions [Line Items] Assets Assets [Abstract] Investments Investments [Abstract] Available-for-sale securities, at fair value: Available-for-sale Securities [Abstract] Fixed maturities Available-for-sale Securities, Debt Securities Equity securities Available-for-sale Securities, Equity Securities Trading securities, at fair value Trading Securities, Equity Limited partnerships Equity Method Investments Other invested assets Other Investments Total investments Investments Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Premiums receivable from policyholders Premiums Receivable, Net Reinsurance recoverable Reinsurance Recoverables Deferred income tax asset Deferred Tax Assets, Net Deferred acquisition costs Deferred Policy Acquisition Costs Other assets Other Assets Receivables from the Exchange and other affiliates Accounts Receivable, Related Parties Note receivable from EFL Notes Receivable, Related Parties Total assets Assets Liabilities Liabilities [Abstract] Losses and loss expense reserves Liability for Claims and Claims Adjustment Expense, Property Casualty Liability Life policy and deposit contract reserves Liability for Future Policy Benefits Unearned premiums Unearned Premiums Deferred income tax liability Deferred Tax Liabilities, Net Other liabilities, adjusted for consolidation presentation Other Liabilities Adjusted for Consolidating Presentation The aggregate carrying amount, as of the balance sheet date, of other liabilities not separately disclosed in the balance sheet, adjusted for consolidating presentation. Total liabilities Liabilities Shareholders' equity and noncontrolling interest Stockholders' Equity Attributable to Parent [Abstract] Total Indemnity shareholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interest in consolidated entity - Exchange Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities, shareholders' equity, and noncontrolling interest Liabilities and Equity Payable to Indemnity Due to Related Parties Note receivable from EFL, annual interest rate (as a percent) Notes Receivable Related Parties Annual Interest Rate Represents the annual interest rate on a note receivable from a party associated with the reporting entity. Note receivable from EFL, interest income recognized by Indemnity Interest Income, Related Party Class of Stock Disclosures [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Class A Common Class A [Member] Class B Common Class B [Member] Common Stock Class of Stock [Line Items] Ratio for converting shares of Class B common stock into shares of Class A common stock (as a percent) Common Stock Conversion Ratio The ratio applied to Class B common stock shares for purposes of determining the number of Class A common stock shares into which the stock will be converted (the number of Class A common stock shares into which one Class B common stock share may be converted). Class B common stock shares converted into Class A common stock shares (in shares) Conversion of Stock, Shares Converted Class A common stock shares issued upon conversion of Class B common stock shares (in shares) Conversion of Stock, Shares Issued Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Schedule of changes in Indemnity's accumulated other comprehensive loss by component attributable to the Indemnity shareholder interest Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of amounts reclassified out of accumulated other comprehensive income (loss) and the related affected line item in the Consolidated Statements of Operations where net income is presented Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Variable Interest Entity [Abstract] -- None. No documentation exists for this element. -- Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Management operations Insurance Agency Management Segment [Member] Segment in which the financial information pertaining to management services is reflected. Variable Interest Entity disclosures Variable Interest Entity [Line Items] Indemnity's maximum management fee rate as a percent of premiums written and assumed by the Exchange (as a percent) Insurance Agency Management Fee, Maximum Percent Represents the maximum management fee rate, determined by the board of directors of the entity, calculated as a percentage of the direct and affiliated assumed written premiums. Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Indemnity's components of direct cash flows as included in the Consolidated Statements of Cash Flows Condensed Cash Flow Statements, Captions [Line Items] Management fee received Proceeds from Insurance Agency Management Fees Received Cash received for management fees during the current period. Service agreement fee received Proceeds from Fees Received Net investment income received Proceeds from Interest and Dividends Received Limited partnership distributions Proceeds from Equity Method Investment, Dividends or Distributions Decrease in reimbursements collected from affiliates Increase (Decrease) Due from Affiliates Commissions and bonuses paid to agents Payments for Commissions Salaries and wages paid Payments to Employees Pension contribution and employee benefits paid Payments for Other Labor Related Expenses Payments of cash for payroll tax expense, postemployment and benefit-related expenses not elsewhere specified in the taxonomy (such as health plan, profit sharing, incentives, tuition reimbursement, other fringe benefits and perquisites) during the current period. General operating expenses paid Payments for Other Operating Activities Income taxes paid Income Taxes Paid, Net Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net increase (decrease) in cash and cash equivalents Net Cash Provided by (Used in) Continuing Operations Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Statement Statement [Line Items] Fixed maturities, amortized cost Available-for-sale Debt Securities, Amortized Cost Basis Equity securities, cost Available-for-sale Equity Securities, Amortized Cost Basis Trading securities, cost Trading Securities, Equity, Cost Limited partnerships, cost Equity Method Investment, Aggregate Cost Common stock, stated value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, authorized (in shares) Common Stock, Shares Authorized Common stock, issued (in shares) Common Stock, Shares, Issued Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Treasury stock (in shares) Treasury Stock, Shares Equity Method Investments and Joint Ventures [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Method Of Accounting [Axis] Method Of Accounting [Axis] Information by method of accounting. Method Of Accounting [Domain] Method Of Accounting [Domain] Various methods of accounting under generally accepted accounting practices. Equity method of accounting Equity Method Of Accounting [Member] An accounting method used by entities to assess the profits earned by investments in other companies. The entity reports the income earned on the investment on its income statement and the reported value is based on the entity's share of the company assets. The reported profit is proportional to the size of the equity investment. This is the standard method used when one company has significant influence over another. Fair value option Fair Value Option [Member] The fair vale option permits entities to choose, at specified election dates, to measure eligible items at fair value (the “fair value option”), the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A business entity shall report unrealized gains and losses on items for which the fair value option has been elected in earnings (or another performance indicator if the business entity does not report earnings) at each subsequent reporting date. Upfront costs and fees related to items for which the fair value option is elected shall be recognized in earnings as incurred and not deferred. Investments in limited partnerships Schedule of Equity Method Investments [Line Items] Equity in earnings of limited partnerships Income (Loss) from Equity Method Investments Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Operating segment Operating Segments [Member] Eliminations Intersegment Eliminations [Member] Property and casualty insurance operations Property, Liability and Casualty Insurance Product Line [Member] Life insurance operations Life Insurance Product Line [Member] Investment operations Insurance Investments Segment [Member] Segment in which the financial information pertaining to the investment of premiums to cover losses related to future policy benefits is reflected. Segment information Segment Reporting Information [Line Items] Total investment revenues Insurance Investment Income Revenues Revenues [Abstract] Premiums earned/life policy revenue Premiums Earned Net Adjusted for Consolidating Presentation Premiums earned for all insurance and reinsurance contracts after subtracting any amounts ceded to another insurer and adding premiums assumed from other insurers, adjusted for consolidating presentation. Net investment income Net Investment Income Net realized investment (losses) gains Realized Investment Gains (Losses) Net impairment losses recognized in earnings Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities Management fee revenue Insurance Agency Management Fee Service agreement and other revenue Contractually Specified Servicing Fees, Late Fees, and Ancillary Fees Earned in Exchange for Servicing Financial Assets Total revenues Revenues Benefits and expenses Benefits, Losses and Expenses [Abstract] Cost of management operations Service Management Costs Insurance losses and loss expenses Policyholder Benefits and Claims Incurred Net Adjusted for Consolidating Presentation Provision for benefits, claims and claims settlement expenses incurred during the period net of the effects of contracts assumed and ceded, adjusted for consolidating presentation. Policy acquisition and underwriting expenses Deferred Policy Acquisition Cost Amortization Expense and Other Underwriting Expense This element represents expenses related to both deferred policy acquisition costs, amortization expense (amount of deferred policy acquisition costs charged to expense in the period, generally in proportion to related revenue earned, estimated gross profits, or over the customer relationship or some other period) and other underwriting expenses (costs incurred during the period, such as those relating to general administration and policy maintenance that do not vary with and are not primarily related to the acquisition or renewal of insurance contracts). Total benefits and expenses Benefits, Losses and Expenses Income (loss) from operations before income taxes and noncontrolling interest Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Reclassification Out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Unrealized holding gains (losses) on available-for-sale securities including portion attributable to Exchange noncontrolling interest Accumulated Net Investment Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] Unrealized holding gains (losses) on available-for-sale securities attributable to Exchange noncontrolling interest Accumulated Net Investment Gain (Loss) Attributable to Noncontrolling Interest [Member] Unrealized holding gains (losses) on available-for-sale securities attributable to Indemnity shareholder interest Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] Amortization of postretirement plan items Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Amounts reclassified from accumulated other comprehensive income (loss) Reclassification out of Accumulated Other Comprehensive Income [Member] Amounts reclassified out of accumulated other comprehensive income (loss) and the related affected line item in the Consolidated Statements of Operations where net income is presented Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Net impairment losses recognized in earnings Less: Net (loss) income attributable to noncontrolling interest in consolidated entity – Exchange Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to Indemnity Net Income (Loss) Attributable to Parent Schedule of Investment Income, Reported Amounts, by Category [Table] Investment Income [Table] Investment Type [Axis] Investment Type [Axis] Investment Type Categorization [Domain] Investments [Domain] Fixed maturities Debt Securities [Member] Equity securities Equity Securities [Member] Cash equivalents and other Cash and Cash Equivalents [Member] Investment income from portfolios Net Investment Income [Line Items] Total investment income Interest and Dividend Income, Operating Less: investment expenses Investment Income, Investment Expense Investment income, net of expenses Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Unrealized holding gains (losses) on available-for-sale securities Postretirement plans Changes in Indemnity's accumulated other comprehensive income (loss) by component attributable to the Indemnity shareholder interest Accumulated Other Comprehensive Income (Loss) [Line Items] Changes in Indemnity's accumulated other comprehensive income (loss) by component attributable to the Indemnity shareholder interest AOCI Attributable to Parent, Net of Tax [Roll Forward] Balance, beginning of period Accumulated Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) before reclassifications, net of tax OCI, before Reclassifications, Net of Tax, Attributable to Parent Amounts reclassified from accumulated other comprehensive income (loss), net of tax Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Net current period other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Balance, end of period Fair Value Disclosures [Abstract] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair value measurements on a recurring basis Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 3 Fair Value, Inputs, Level 3 [Member] States & political subdivisions US States and Political Subdivisions Debt Securities [Member] Foreign government securities Foreign Government Debt Securities [Member] Corporate debt securities Corporate Debt Securities [Member] Residential mortgage-backed securities Residential Mortgage Backed Securities [Member] Commercial mortgage-backed securities Commercial Mortgage Backed Securities [Member] Collateralized debt obligations Collateralized Debt Obligations [Member] Other debt securities Other Debt Obligations [Member] Nonredeemable preferred stock Nonredeemable Preferred Stock [Member] Common stock Common Stock [Member] Real estate Real Estate Funds [Member] Investment Secondary Categorization [Axis] Investment Secondary Categorization [Axis] Investments by Secondary Categorization [Domain] Investments by Secondary Categorization [Domain] Available-for-sale securities Available-for-sale Securities [Member] Trading securities Trading Securities [Member] Limited partnerships Partnership Interest [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Net realized investment gains (losses) Net Realized Investment Gains Losses [Member] Primary financial statement caption in which reported facts about net realized investment gains (losses) have been included. Equity in earnings of limited partnerships Income Loss From Equity Method Investments Location [Member] Primary financial statement caption in which reported facts about equity in earnings (losses) of limited partnerships have been included. Level 3 changes Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Roll forward of consolidated level 3 fair value measurements on a recurring basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Included in other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Sales Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Transfers in and (out) of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Ending balance Fair value transfers due to changes in available market observable inputs Fair Value Transfers Due to Changes in Available Market Observable Inputs [Abstract] -- None. No documentation exists for this element. -- Transfers from level 1 to level 2 Fair Value, Assets, Level 1 to Level 2 Transfers, Amount During Period Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2 which have taken place during the period. Transfers from level 2 to level 1 Fair Value, Assets Level 2 to Level 1 Transfers, Amount During Period Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1 which have taken place during the period. Transfers from level 2 to level 3 FairValueAssetsLevel2ToLevel3TransfersAmountDuringPeriod Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 3 which have taken place during the period. Transfers from level 3 to level 2 FairValueAssetsLevel3ToLevel2TransfersAmountDuringPeriod Amount of transfers of assets measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 2 which have taken place during the period. No. of securities transferred between Level 1 and Level 2 Number of Securities Transferred, Fair Value Assets, Between Level 1 and Level 2 Represents the number of securities in the entity's investment portfolio that necessitated reclassification between Level 1 and Level 2 due to trading activity levels. No. of securities transferred between Level 2 and Level 1 Number of Securities Transferred, Fair Value Assets, Between Level 2 and Level 1 Number of Securities Transferred, Fair Value Assets, Between Level 2 and Level 1 No. of securities transferred between Level 2 and Level 3 Number of Securities Transferred, Fair Value Assets, Between Level 2 and Level 3 Represents the number of securities in the entity's investment portfolio that necessitated reclassification between Level 2 and Level 3 due to trading activity levels. No. of securities transferred between Level 3 and Level 2 Number of Securities Transferred, Fair Value Assets, Between Level 3 and Level 2 Represents the number of securities in the entity's investment portfolio that necessitated reclassification between Level 3 and Level 2 due to trading activity levels. Schedule of components of the Consolidated Statements of Operations by reportable business segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Segment Information Segment Reporting Disclosure [Text Block] Income Statement [Abstract] Premiums earned Premiums Earned, Net Other income Insurance losses and loss expenses Policyholder Benefits and Claims Incurred, Net Less: Net (loss) income attributable to noncontrolling interest in consolidated entity – Exchange Earnings Per Share Earnings Per Share [Abstract] Net income attributable to Indemnity per share Earnings Per Share, Basic and Diluted [Abstract] Common stock - basic (in dollars per share) Earnings Per Share, Basic Common stock - diluted (in dollars per share) Earnings Per Share, Diluted Weighted average shares outstanding attributable to Indemnity - Basic Weighted Average Number of Shares Outstanding, Basic [Abstract] Common stock - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Weighted average shares outstanding attributable to Indemnity - Diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Common stock - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Dividends declared per share Dividends, Common Stock [Abstract] Common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Schedule of consolidated fair value measurements on a recurring basis by asset class and level of input Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of roll forward of consolidated Level 3 fair value measurements on a recurring basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of Quantitative and Qualitative Disclosures about Unobservable Inputs Fair Value Inputs, Assets, Quantitative Information [Table Text Block] Schedule of consolidated fair value measurements on a recurring basis by pricing source Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] Indemnity Accumulated Other Comprehensive Loss Comprehensive Income (Loss) Note [Text Block] Deferred income taxes Liabilities and shareholders' equity Liabilities and Equity [Abstract] Deferred income taxes Other liabilities Other Liabilities Indemnity shareholders' equity Common stock Common Stock, Value, Issued Additional paid-in-capital Additional Paid in Capital, Common Stock Accumulated other comprehensive loss Retained earnings Retained Earnings (Accumulated Deficit) Total contributed capital and retained earnings Stockholders' Equity before Treasury Stock Treasury stock, at cost, 22,110,132 shares held Treasury Stock, Value Fair Value Fair Value Disclosures [Text Block] Condensed Income Statement [Table] Condensed Income Statement [Table] Income attributable to Indemnity shareholder interest Condensed Income Statements, Captions [Line Items] Management fee revenue, net Service agreement revenue Statement of Comprehensive Income [Abstract] Change in unrealized holding (losses) gains on available-for-sale securities, tax benefit (expense) Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Reclassification adjustment for gross losses (gains) included in net income, tax (expense) benefit Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Investments Investments in Debt and Equity Instruments, Cash and Cash Equivalents, Unrealized and Realized Gains (Losses) [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Indemnity Supplemental Information Condensed Financial Information of Parent Company Only Disclosure [Text Block] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Stock repurchase program Share Repurchase Program 2004 [Member] A stock repurchase program was authorized by the company's board of directors for the purchase of its outstanding Class A nonvoting common stock beginning January 1, 2004. These shares are recorded as Treasury shares in the company's consolidated statements of financial position at total cost based upon trade date. Stock repurchases Equity, Class of Treasury Stock [Line Items] Amount of authorized stock repurchases approved for continuation under the current program Stock Repurchase Program, Authorized Amount Approximate amount of repurchase authority remaining under the current stock repurchase program Stock Repurchase Program, Remaining Authorized Repurchase Amount Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] U.S. treasury US Treasury Securities [Member] Government sponsored enterprises US Government-sponsored Enterprises Debt Securities [Member] Common stock Available-for-sale securities Schedule of Available-for-sale Securities [Line Items] Amortized cost, fixed maturities Amortized cost, equity securities Amortized cost Available-for-sale Securities, Amortized Cost Basis Gross unrealized gains, fixed maturities Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized gains, equity securities Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized losses, fixed maturities Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Gross unrealized losses, equity securities Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax Gross unrealized losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Estimated fair value, fixed maturities Estimated fair value, equity securities Estimated fair value Available-for-sale Securities Private equity Private Equity Funds [Member] Mezzanine debt Mezzanine Funds [Member] Investments held in mezzanine funds. Schedule of Equity Method Investment Equity Method Ownership Percent [Axis] Schedule of Equity Method Investment Equity Method Ownership Percent [Axis] Represents the categorization of equity by ownership percentage. Equity Method Investment Ownership Percent [Domain] Equity Method Investment Ownership Percent [Domain] Represents the categories of percentages of ownership in equity method investees. Less than 10% Equity Method Investment Ownership Percent Less Than 10 Percent [Member] Represents the category of equity method investees in which the entity has less than 10% ownership. Greater than or equal to 10% but less than 50% Equity Method Investment Ownership Percent Greater than or Equal to 10 Percent but Less than 50 Percent [Member] Represents the category of equity method investees in which the entity has greater than or equal to 10% but less than 50% ownership. Greater than 50% Equity Method Investment Ownership Percent Greater than 50 Percent [Member] Represents the category of equity investees in which the entity has greater than 50% ownership. Equity in earnings of limited partnerships Number of partnerships Equity Method Investments, Number of Partnerships Represents the number of limited partnership investments recorded using the equity method of accounting. Asset recorded Income (loss) recognized due to valuation adjustments by the partnerships Income (Loss) from Equity Method Investments, Partnership Valuation Adjustments Represents the entity's proportionate share of net income (loss) attributable to valuation adjustments of its investee to which the equity method of accounting is applied. There is a one-quarter lag in the reporting of limited partnership investments by the reporting entity due to the timing of when financial statements are received. Income (loss) recorded Income (Loss) from Equity Method Investments before Partnership Valuation Adjustments Represents the entity's proportionate share of net income (loss) excluding valuation adjustments of its investee to which the equity method of accounting is applied. There is a one-quarter lag in the reporting of limited partnership investments by the reporting entity due to the timing of when financial statements are received. Valuation change of equity method investment expected to be recorded next quarter ValuationChangeInEquityMethodInvestmentToBeRecordedNextQuarter Changes in the value of equity method investments (i.e limited partnership) expected to be recorded in our financial statements as equity in earnings of limited partnerships in the next quarter. Limited partnership investments are generally reported in our financial statements on a one quarter lag, but we survey each general partner at the end of each quarter to determine if they are aware of significant valuation changes prior to the release of the fund’s latest financial statements, and disclose this information in cases when warranted. Per the limited partner financial statements Equity Method Investment, Summarized Financial Information [Abstract] Total partnership assets Equity Method Investment, Summarized Financial Information, Assets Total partnership liabilities Equity Method Investment, Summarized Financial Information, Liabilities Total partnership valuation adjustment gains (losses) Equity Method Investment Summarized Financial Information Partnership Valuation Adjustments Total valuation adjustments reported in net income (loss) by all investees accounted for under the equity method. There is generally a one-quarter lag in the reporting of limited partnership investments by the reporting entity due to the timing of when financial statements are received. Total partnership net income Equity Method Investments, Summarized Financial Information, Partnership Net Income (Loss) Total net income (loss) excluding valuation adjustments reported by all investees accounted for under the equity method. There is generally a one-quarter lag in the reporting of limited partnership investments by the reporting entity due to the timing of when financial statements are received. Schedule Of Earnings Per Share Basic And Diluted [Table] Schedule Of Earnings Per Share Basic And Diluted [Table] Disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. Reconciliation of the numerators and denominators used in the basic and diluted per-share computations Schedule Of Earnings Per Share Basic And Diluted [Line Items] 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. Income available to stockholders (Basic EPS:) Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Allocated net income (numerator) (in dollars) Net Income (Loss) Available to Common Stockholders, Basic Weighted shares (denominator) (in shares) Per-share amount (in dollars per share) Dilutive effect of stock-based awards Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Allocated net income (numerator) (in dollars) Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units Weighted shares (denominator) (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Assumed conversion of Class B shares Dilutive Securities Effect on Basic Earnings Per Share Assumed Conversion [Abstract] -- None. No documentation exists for this element. -- Allocated net income (numerator) (in dollars) Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities Weighted shares (denominator) (in shares) Incremental Common Shares Attributable to Conversion of Convertible Common Stock Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible common stock using the if-converted method. Income available to stockholders on equivalent shares (Diluted EPS:) Net Income (Loss) Attributable to Parent, Diluted [Abstract] Allocated net income (numerator) (in dollars) Net Income (Loss) Attributable to Parent, Diluted Weighted shares (denominator) (in shares) Per-share amount (in dollars per share) Compensation and Retirement Disclosure [Abstract] Postretirement Benefits Pension and Other Postretirement Benefits Disclosure [Text Block] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table] Fair value measurements on a nonrecurring basis Fair Value, Measurements, Nonrecurring [Member] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Fair Value Measurements, Fair Value Pricing Sources [Axis] Fair Value Measurements, Fair Value Pricing Sources [Axis] Fair value information by pricing source. Fair Value Measurements, Fair Value Pricing Sources [Domain] Fair Value Measurements, Fair Value Pricing Sources [Domain] Provides the categories of pricing sources used to value financial assets and liabilities measured at fair value. Priced via pricing services Pricing Services [Member] Represents the source of fair value estimates as a nationally recognized pricing service. Priced via market comparables/broker quotes MarketComparablesBrokerQuote [Member] Represents the source of fair value estimates as broker quotes and/or market comparables which are generally used when a price from the pricing service is not available. Priced via internal modeling Internal Modeling [Member] Represents the source of fair value estimates as internal modeling, which is an internally-developed risk-adjusted discounted cash flow model generally used when no prices are available from a pricing service and no comparable market quotes are available. Priced via unobservable inputs Unobservable Inputs [Member] Represents the source of fair value estimates as unobservable inputs. Fair value measurements on a recurring basis, valuation techniques Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] Fair value by pricing source Fair Value by Pricing Source [Abstract] -- None. No documentation exists for this element. -- Available-for-sale securities Other investments Alternative Investments, Fair Value Disclosure Trading and available-for-sale securities Trading And Available For Sale Securities Fair Value Disclosure This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale and Trading Securities which consist of all investments in certain debt and equity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale and Trading. Total Investments, Fair Value Disclosure Schedule of Gain (Loss) on Investments [Table] Schedule of Gain (Loss) on Investments [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Gains (losses) on investments Gain (Loss) on Investments [Line Items] Available-for-sale securities: Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments [Abstract] Gross realized gains Available-for-sale Securities, Gross Realized Gains Gross realized losses Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments Net realized gains (losses) Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments Trading securities: Trading Securities, Realized Gain (Loss) [Abstract] Gross realized gains Trading Securities, Realized Gain Gross realized losses Trading Securities, Realized Loss Increases (decreases) in fair value Trading Securities, Change in Unrealized Holding Gain (Loss) Net realized gains (losses) Trading Securities, Realized Gain (Loss) Realized investment gains (losses) Realized Investment Gains (Losses) [Abstract] Net realized investment gains (losses) Other-than-temporary impairments on investments Other than Temporary Impairment Losses, Investments, Available-for-sale Securities [Abstract] Other -than-temporary impairments on investments Other than Temporary Impairment Losses, Investments, Available-for-sale Securities Portion recognized in other comprehensive income Other than Temporary Impairment Losses, Investments, Portion in Other Comprehensive Loss, before Tax, Including Portion Attributable to Noncontrolling Interest, Available-for-sale Securities Stockholders' Equity Note [Abstract] Schedule of reconciliation of the beginning and ending balances of Indemnity's shareholders' equity and the noncontrolling interest Schedule of Stockholders Equity [Table Text Block] Net income Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax [Abstract] Change in unrealized holding (losses) gains on available-for-sale securities, net of tax benefit (expense) of $22, $32, $66 and $(48), respectively Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Reclassification adjustment for gross losses (gains) included in net income, net of tax (expense) benefit of $0, $1, $4 and $8, respectively Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Less: Comprehensive (loss) income attributable to noncontrolling interest in consolidated entity – Exchange Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Total comprehensive income – Indemnity Comprehensive Income (Loss), Net of Tax, Attributable to Parent Organization, Consolidation and Presentation of Financial Statements [Abstract] Nature of Operations Nature of Operations [Text Block] Debt Disclosure [Abstract] Line of Credit Facility [Table] Line of Credit Facility [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent event Subsequent Event [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving line of credit Revolving Credit Facility [Member] Bank Line of Credit Line of Credit Facility [Line Items] Maximum borrowing capacity under the bank revolving line of credit Line of Credit Facility, Maximum Borrowing Capacity Maximum letter of credit sublimit under the bank revolving line of credit Letters Of Credit Maximum, Amount The maximum letters of credit capcity under the credit facility as of the reporting date. Expiration date of the bank revolving line of credit Line of Credit Facility, Expiration Date Available borrowing capacity under the bank revolving line of credit, due to outstanding letters of credit Line of Credit Facility, Current Borrowing Capacity Outstanding amount of letters of credit under the bank revolving line of credit Letters of Credit Outstanding, Amount Available amount of letters of credit under the bank revolving line of credit Letters Of Credit Available, Amount The available amount of letters of credit less the amount of the contingent obligation under letters of credit outstanding under the credit facility as of the reporting date. Borrowings outstanding under the bank revolving line of credit Long-term Line of Credit Fair value of bonds pledged as collateral on the bank revolving line of credit Security Owned and Pledged as Collateral, Fair Value Subsequent event description Subsequent Event, Description Document and Entity Information [Abstract] -- None. No documentation exists for this element. -- Class A Common Stock Class B Common Stock Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Reconciliation of the beginning and ending balances of Indemnity's shareholders' equity and the noncontrolling interest Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance, beginning of period Net income Change in accumulated other comprehensive income (loss), net of tax Net purchase of treasury stock Treasury Stock, Value, Acquired, Cost Method Dividends declared: Dividends declared (in dollars per share) Dividends declared Dividends, Common Stock, Cash Balance, end of period Income Tax [Table] Income Tax [Table] Schedule of information pertaining to income taxes. Minimum Minimum [Member] Income taxes Income Tax [Line Items] 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. Net deferred income tax liability, consolidated Net Deferred Tax Assets or Net Deferred Tax Liabilities Consolidating Presentation Represents the net balance of all deferred tax assets and deferred tax liabilities reported for consolidating disclosure purposes, which could result in a net deferred tax asset or a net deferred tax liability balance as of the balance sheet date, resulting from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. A temporary difference is a difference between the tax basis of an asset or liability and its carrying amount in the financial statements prepared in accordance with generally accepted accounting principles that will reverse in ensuing periods. Net deferred income tax asset Net deferred income tax liability Deferred tax asset valuation allowance Deferred Tax Assets, Valuation Allowance Percent of total permanent tax differences related to investment revenues (as a percent) Income Tax Reconciliation, Permanent Tax Differences, Percentage from Investment Revenues Represents the percent of the total permanent tax differences that are related to investment revenues (such as tax exempt interest and dividends received deduction). Effective tax rate when investment related permanent tax differences are excluded (as a percent) Effective Income Tax Rate, Excluding Investment Revenue, Permanent Tax Differences Represents the effective tax rate if permanent tax differences related to investment revenues were excluded from the calculation (such as tax exempt interest and dividends received deduction). Schedule of Condensed Financial Statements [Table] Condensed Financial Statements [Table] Condensed financial statements Condensed Financial Statements, Captions [Line Items] Schedule of Consolidating Statement of Financial Position Condensed Balance Sheet [Table Text Block] Schedule of Income attributable to Indemnity shareholder interest Condensed Income Statement [Table Text Block] Schedule of Indemnity's components of direct cash flows as included in the Consolidated Statements of Cash Flows Condensed Cash Flow Statement [Table Text Block] Indemnity Earnings Per Share Earnings Per Share [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Variable Interest Entity Variable Interest Entity Disclosure [Text Block] Accounting Policies [Abstract] Basis of presentation Basis of Accounting, Policy [Policy Text Block] Use of estimates Use of Estimates, Policy [Policy Text Block] Principles of consolidation Consolidation, Policy [Policy Text Block] Recently issued accounting standards New Accounting Pronouncements, Policy [Policy Text Block] Earnings per share Earnings Per Share, Policy [Policy Text Block] Consolidation of variable interest entity Consolidation, Variable Interest Entity, Policy [Policy Text Block] Fair value of financial instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Fair value of financial instruments, transfers between levels Fair Value Transfer, Policy [Policy Text Block] Investments - Limited partnerships Equity Method Investments, Policy [Policy Text Block] Commitments and contingencies Commitments and Contingencies, Policy [Policy Text Block] Bank Line of Credit Debt Disclosure [Text Block] Schedule of reconciliation of the numerators and denominators used in the basic and diluted per-share computations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Credit Rating [Axis] External Credit Rating by Grouping [Axis] Credit Rating [Domain] External Credit Rating by Grouping [Domain] Investment grade External Credit Rating, Investment Grade [Member] Non-investment grade External Credit Rating, Non Investment Grade [Member] Fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Less than 12 months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value 12 months or longer Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Total Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] Less than 12 months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss 12 months or longer Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss No. of holdings Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Other Commitments [Table] Other Commitments [Table] Contractual commitments Other Commitments [Line Items] Represents the entity's maximum contractual commitments to invest in its limited partnership investments Other Commitment Description of commitment: contractual commitment to invest in limited partnership investments Other Commitments, Description Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Employee pension plan Pension Plan [Member] Postretirement Benefits Defined Benefit Plan Disclosure [Line Items] Postretirement annual benefit expense reimbursed to Indemnity from the Exchange and EFL (as a percent) Defined Benefit Plan, Postretirement Benefit (Expenses) Reimbursement Percentage Represents the percentage at which postretirement benefit expenses are reimbursed to the parent company. Employer contributions Defined Benefit Plan, Contributions by Employer Contingent liability for amount of nonparticipating annuity contracts the employee pension plan purchased from EFL Defined Benefit Plan, Estimated Amount of Plan Participants' Future Benefits Covered by Insurance Contracts Issued by Employer or Related Parties Cost of pension plans Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Service cost for benefits earned Defined Benefit Plan, Service Cost Interest cost on benefits obligation Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return on Plan Assets Prior service cost amortization Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Net actuarial loss amortization Defined Benefit Plan, Amortization of Gains (Losses) Pension plan cost Defined Benefit Plan, Net Periodic Benefit Cost Schedule of reconciliation of cost to fair value of available-for-sale securities Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of amortized cost and estimated fair value of fixed maturities by remaining contractual term to maturity Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of available-for-sale securities in a gross unrealized loss position by length of time for securities in a gross unrealized loss position Schedule of Unrealized Loss on Investments [Table Text Block] Schedule of investment income, net of expenses, from portfolios Investment Income [Table Text Block] Schedule of realized gains (losses) on investments recognized in income Realized Gain (Loss) on Investments [Table Text Block] Schedule of components of other-than-temporary impairments on investments Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block] Schedule of limited partnership results, generally reported on a one-quarter lag Equity Method Investments [Table Text Block] Schedule of Product Information [Table] Schedule of Product Information [Table] Product information Product Information [Line Items] Number of states in which the Property and Casualty Group operates Number of States in which Entity Operates Statement of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Premiums collected Proceeds from Insurance Premiums Collected Losses paid Payments for Losses Cash payments for losses (the actual damage) made by an insurance company to settle claims, during the period. Loss expenses paid Payments for Loss Adjustment Expense Cash payments for adjustment expenses (the expense incurred related to claims other than the actual loss, for example, legal fees) made by an insurance company to settle claims, during the period. Other underwriting and acquisition costs paid Payments for Underwriting Expense Income taxes paid Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Purchase of investments: Payments to Acquire Investments [Abstract] Fixed maturities Payments to Acquire Available-for-sale Securities, Debt Preferred stock Payments to Acquire Available-for-sale Securities, Equity Common stock Payments to Acquire Trading Securities Held-for-investment Limited partnerships Payments to Acquire Limited Partnership Interests Sales/maturities of investments: Proceeds from Sale, Maturity and Collection of Investments [Abstract] Fixed maturity sales Proceeds from Sale of Available-for-sale Securities, Debt Fixed maturity calls/maturities Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Preferred stock Proceeds from Sale of Available-for-sale Securities, Equity Common stock Proceeds from Sale of Trading Securities Held-for-investment Sale of and returns on limited partnerships Proceeds from Limited Partnership Investments Net purchase of property and equipment Payments for (Proceeds from) Productive Assets Net collections on agent loans Payments for (Proceeds from) Loans Receivable Net distributions on life policy loans Payments for (Proceeds from) Policy Loans Net cash provided by (used in) investing activities Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Annuity deposits and interest Proceeds from Annuities and Investment Certificates Annuity surrenders and withdrawals Repayments of Annuities and Investment Certificates Universal life deposits and interest Proceeds from Universal Life Contracts The cash inflow from universal life contracts (a long-duration insurance contract) under which the policy holder makes a deposit, which accrues interest, less fees and charges related to the cost of insurance. Universal life surrenders Repayments of Universal Life Contracts The cash outflow from universal life contracts (a long-duration insurance contract) under which the policy holder makes a deposit, which accrues interest, less fees and charges related to the cost of insurance. Purchase of treasury stock Payments for Repurchase of Common Stock Dividends paid to shareholders Payments of Ordinary Dividends, Common Stock Net cash provided by (used in) financing activities Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair value measurements on a recurring basis by asset class and level of input Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Trading securities Trading Securities Total % of total assets at fair value AssetsAsPercentOfAssetsMeasuredAtFairValueRecurring Assets as a percent of total assets measured at fair value on a recurring basis. Other investments: Other Investments [Abstract] Number of real estate funds reported under fair value option Number of Real Estate Funds Reported Under Fair Value Option Number of Real Estate Funds Reported Under Fair Value Option Underlying assets, liquidation period from inception of fund (in years) Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Liquidating Investment, Remaining Period Contributions made to the funds Distributions received from the funds Unfunded commitments Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments Significant Accounting Policies Significant Accounting Policies [Text Block] Indemnity Shareholders' Equity and Noncontrolling Interest Stockholders' Equity Note Disclosure [Text Block] Schedule of cost of pension plans Schedule of Net Benefit Costs [Table Text Block] Indemnity Capital Stock Stock by Class [Text Block] The entire disclosure of an entity's stock (includes common, convertible, and preferred stocks), including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock including , and, the entire disclosure for an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock and other information necessary to a fair presentation, and EPS information. Amortized cost Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Due after five years through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Due after ten years Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Estimated fair value Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Due after five years through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Due after ten years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Estimated fair value, fixed maturities Fair Value Inputs, Assets, Quantitative Information [Table] Fair Value Inputs, Assets, Quantitative Information [Table] Valuation Technique [Axis] Valuation Technique [Axis] Valuation Technique [Domain] Valuation Technique [Domain] Market approach Market Approach Valuation Technique [Member] Weighted average Weighted Average [Member] Fair value inputs assets quantitative information Fair Value Inputs, Assets, Quantitative Information [Line Items] Fair value (in dollars) Unobservable input Fair Value Inputs [Abstract] Comparable transaction EBITDA multiples (as a multiple) Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple Comparable security yield (as a percent) Fair Value Inputs Comparable Security Yield The observable yield of another security with similar characteristics to the security being valued, used as an input to measure fair value. Discount for lack of marketability (as a percent) Fair Value Inputs, Discount for Lack of Marketability