Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Adjusted balance, beginning of period Balance, end of period - Indemnity Additional Paid in Capital, Common Stock Additional paid-in-capital Equity Method Investment, Dividends or Distributions Limited partnership distributions Earnings Per Share, Basic Common stock - basic (in dollars per share) Payments for (Proceeds from) Productive Assets Purchase of property and equipment Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents (Exchange portion of $239 and $158, respectively) Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Interest Paid Interest paid on bank line of credit Payments for Underwriting Expense Other underwriting and acquisition costs paid Liability for Claims and Claims Adjustment Expense, Property Casualty Liability Losses and loss expense reserves Payments for Commissions Commissions and bonuses paid to agents Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Class B common stock Common Stock, Shares Authorized Common stock, authorized (in shares) Common Stock, Shares, Issued Common stock, issued (in shares) Common Stock, Shares, Outstanding Common stock, outstanding (in shares) Common Stock, Value, Issued Common stock Comprehensive Income Note [Text Block] Comprehensive Income Deferred Policy Acquisition Costs. Deferred acquisition costs (Exchange portion of $416 and $416, respectively) Deferred Revenue Disclosure [Text Block] Unearned premiums Deferred Tax Assets, Net Deferred income taxes (Exchange portion of $0 and $75, respectively) Earnings Per Share, Diluted Common stock - diluted (in dollars per share) Equity Method Investments Disclosure [Text Block] Income (Loss) from Equity Method Investments Equity in earnings (losses) of limited partnerships Equity Method Investments Limited partnerships Policyholder Benefits and Claims Incurred, Net Insurance losses and loss expenses Proceeds from Fees Received Service agreement fee received Liability for Future Policy Benefits Life policy and deposit contract reserves Gain (Loss) on Investments Impairment of Investments Net impairment losses recognized in earnings Income Tax Disclosure [Text Block] Income Tax Income Taxes Paid, Net Income taxes (paid) recovered Increase (Decrease) in Restricted Cash Redemption of securities lending collateral Proceeds from Insurance Premiums Collected Premiums collected Investments. Total investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Liabilities. Total liabilities Liabilities and Stockholders' Equity Total liabilities, shareholders' equity and noncontrolling interest Payments for Losses and Loss Adjustment Expense Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interest in consolidated entity - Exchange Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Proceeds from (Repayments of) Restricted Cash, Financing Activities Decrease in collateral from securities lending Net Income (Loss) Attributable to Parent Net income Net income attributable to Indemnity Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Net Investment Income Net investment income Revenues Total revenues Other Assets Other assets (Exchange portion of $337 and $306, respectively) Other Comprehensive Income, Defined Benefit Plans Adjustment, Net of Tax Postretirement plans net of tax: Other Comprehensive Income, Defined Benefit Plan, Net Prior Service Costs (Credit) Arising During Period, Net of Tax Prior service cost, net of tax Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized loss on securities, net of tax (Note 18) Other Liabilities Other liabilities Payments of Dividends, Common Stock Dividends paid to shareholders Pension and Other Postretirement Benefits Disclosure [Text Block] Postretirement Benefits Premiums Receivable, at Carrying Value Premiums receivable from policyholders (Exchange portion of $780 and $715, respectively) Proceeds from Annuities and Investment Certificates Annuity and supplementary contract deposits and interest Proceeds from Lines of Credit Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Fixed maturity calls/maturities Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Proceeds from Sale of Equity Method Investments Proceeds from Sale of Held-to-maturity Securities Proceeds from Sale of Short-term Investments Common stock Proceeds from Secured Lines of Credit Proceeds from bank line of credit Payments to Acquire Equity Method Investments Payments to Acquire Held-to-maturity Securities Payments to Acquire Property, Plant, and Equipment Payments to Acquire Short-term Investments Common stock Reinsurance Recoverables Reinsurance recoverable (Exchange portion of $201 and $212, respectively) Repayments of Annuities and Investment Certificates Annuity and supplementary contract surrenders and withdrawals Repayments of Lines of Credit Payments on bank line of credit Payments for Repurchase of Common Stock Purchase of treasury stock Retained Earnings (Accumulated Deficit) Retained earnings, after cumulative effect adjustment Premiums Earned, Net Premiums earned Schedule of Capital Units [Text Block] Capital Stock Schedule of Line of Credit Facilities [Text Block] Bank Line of Credit Schedule of Subsequent Events [Text Block] Subsequent Events Segment Reporting Disclosure [Text Block] Segment Information Significant Accounting Policies [Text Block] Significant Accounting Policies Statutory Accounting Practices Disclosure [Text Block] Statutory Information Treasury stock Schedule of Variable Interest Entities [Text Block] Variable Interest Entity Weighted Average Number of Shares Outstanding, Diluted Common stock - diluted (in shares) Weighted Average Number of Shares Outstanding, Basic Common stock - basic (in shares) common stock Available-for-sale Securities, Debt Maturities, Amortized Cost Fixed maturities, amortized cost Available-for-sale Securities, Debt Securities Fixed maturities Available-for-sale Securities, Equity Securities Equity securities Assets. Total assets Trading Securities, Equity Trading securities, at fair value Common Stock, Dividends, Per Share, Declared Common stock, (in dollars per share) Statement [Table] Statement Statement [Line Items] Fair Value Disclosures [Text Block] Fair Value Class of Stock [Domain] Treasury Stock, Value Treasury stock, at cost, 18,036,728 and 17,086,127 shares, respectively Cash Flow, Supplemental Disclosures [Text Block] Supplementary Data on Cash Flows Payments to Acquire Available-for-sale Securities, Debt Fixed maturities Payments to Acquire Available-for-sale Securities, Equity Preferred stock Proceeds from Sale of Available-for-sale Securities, Debt Fixed maturity sales Proceeds from Sale of Available-for-sale Securities, Equity Preferred stock Other Comprehensive Income, Reclassification of Defined Benefit Plan's Net (Gain) Loss Recognized in Net Periodic Benefit Cost, Net of Tax Net actuarial gain, net of tax Class A common stock Increase (Decrease) in Stockholders' Equity Stockholders' Equity, Period Increase (Decrease) Equity Method Investment, Aggregate Cost Limited partnerships, cost Class of Stock [Axis] Unearned Premiums Unearned premiums Common Stock, Par or Stated Value Per Share Common stock, stated value per share (in dollars per share) Treasury Stock, Shares Treasury stock (in shares) Reserve for Losses and Loss Adjustment Expenses Stockholders' Equity Attributable to Parent Total Indemnity shareholders' equity Balances Balances Income Tax Expense (Benefit) Provision for income taxes Other Comprehensive Income, Cumulative Effect of Change in Accounting Principle, Net of Taxes Cumulative effect of accounting changes, net of tax (Note 5,2) Marketable Securities, Fixed Maturities Other Income Other income Benefits, Losses and Expenses Total benefits and expenses Statement, Equity Components [Axis] Additional paid-in capital Retained earnings Accumulated other comprehensive income Total equity Realized Investment Gains (Losses) Net realized investment gains Other Comprehensive Income, Finalization of Pension and Non-Pension Postretirement Plan Valuation, Net of Tax Curtailment/settlement loss, net of tax Stock Issued During Period, Value, Conversion of Convertible Securities Conversion of Class B shares to Class A shares Comprehensive income (loss) Treasury Stock, Value, Acquired, Cost Method Purchase of treasury stock Payments for (Proceeds from) Loans Receivable Net collections (distributions) on agent loans Earnings Per Share [Text Block] Earnings Per Share Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income Net Income (Loss) Attributable to Noncontrolling Interest Less: Net income attributable to noncontrolling interest in consolidated entity - Exchange Comprehensive Income, Net of Tax, Including Portion Attributable to Noncontrolling Interest Total comprehensive income Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total equity Noncontrolling interest Total shareholders' equity Other Investments Other invested assets Dividends, Common Stock, Cash Dividends declared, Class A Deferred Policy Acquisition Costs [Text Block] Deferred Policy Acquisition Costs Reinsurance [Text Block] Reinsurance Nature of Operations [Text Block] Nature of Operations CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY Comprehensive income: Comprehensive Income, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Accumulated other comprehensive loss Postretirement plans (Note 18): Gain (Loss) due to amendments, net of tax Other Comprehensive Income, Gain (Loss) Due to Amendments, Net of Tax This element represents Gain(Loss) due to amendments in the plans that occurred during the period, net of tax. CONSOLIDATED STATEMENTS OF OPERATIONS Revenues Revenues [Abstract] Benefits and expenses Benefits, Losses and Expenses [Abstract] 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). Income from operations before income taxes and noncontrolling interest Income (Loss) from Continuing Operations after Income (Loss) from Equity Method Investments before Income Taxes and Noncontrolling Interest Income (loss) from operations before income taxes and noncontrolling interests This element represents the income (loss) from continuing operations (sum of operating profit and nonoperating income (expense)) after the income (loss) from equity method investments, but before income taxes and the portion attributable to noncontrolling interest. Earnings Per Share Earnings Per Share [Abstract] Net income attributable to Indemnity per share Net Income Attributable to Earnings Per Share [Abstract] Nature of Operations Significant Accounting Policies Earnings Per Share Variable Interest Entity Segment Information Fair Value Investments Bank Line of Credit Income Tax Deferred Policy Acquisition Costs Property and Casualty Unpaid Losses and Loss Expenses Property and Casualty Unpaid Losses and Loss Expenses This element describes the various components of the reserve for claims and claims adjustment expenses; the significant assumptions for estimating claims losses; causes of significant variances from prior periods (such as catastrophes, asbestos and environmental claims reserve losses); and reconciliations of beginning to ending reserve balances. Property and Casualty Unpaid Losses and Expenses [Text Block] Life Policy and Deposit Contract Reserves Life Policy and Deposit Contract Reserves [Text Block] Life Policy and Deposit Contract Reserves This element describes the various components of the reserve for future policy benefits and guaranteed minimum benefits. Unearned premiums. Reinsurance Postretirement Benefits Incentive plans and deferred compensation Capital Stock Comprehensive Income Commitments and Contingencies Supplementary Data on Cash Flows Statutory Information Subsequent Events Indemnity Supplemental Information EFL Supplemental Information Document and Entity Information CONSOLIDATED STATEMENTS OF FINANCIAL POSITION Exchange This element represents the management operations of Exchange. Indemnity This element represents the operations of Indemnity. Assets Assets [Abstract] Available-for-sale securities, at fair value: Available-for-sale Securities [Abstract] Liabilities and shareholders' equity Liabilities and Stockholders' Equity [Abstract] CONSOLIDATED STATEMENTS OF CASH FLOWS 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. Loss expenses paid Retained Earnings, before Cumulative Effect Adjustment Retained earnings, before cumulative effect adjustment This element represents retained earnings of the entity before cumulative adjustment. Cumulative Effect of Accounting Changes, Net of Tax Cumulative effect of accounting changes, net of tax This element represents cumulative effects of the accounting changes, net of tax effects. Total contributed capital and retained earnings Contributed Capital and Retained Earnings This element represents the total of the contributed capital and retained earnings. Indemnity's shareholders' equity StockholdersEquityAbstract Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of investments: Payments to Acquire Investments [Abstract] Sales/maturities of investments: Proceeds from Sale, Maturity and Collections of Investments [Abstract] Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Available for Sale Securities Equity Securities, Cost Equity securities, cost For an unclassified balance sheet, this item represents equity securities, at cost, categorized neither as held-to-maturity nor trading. Equity securities represent ownership interests or the right to acquire ownership interests in corporations and other legal entities in which ownership interest is represented by shares of common or preferred stock (which is not mandatorily redeemable or redeemable at the option of the holder), convertible securities, stock rights, or stock warrants. Trading Securities Equity, Cost Trading securities, cost Total common and preferred stock (which is neither mandatorily redeemable nor redeemable at the option of the holder) equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time), at cost, or for equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value, at cost. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition; this is the reason why the trading category of investments in debt securities are bought and sold "principally " for sale in the near term. Transfers into and out of the trading category should be rare. Common Stock Conversion Rate The number of Class A common stock shares into which one Class B common stock share may be converted. Common stock, convertible rate of Class A shares for one Class B share (in shares) Dividends declared: Weighted average shares outstanding attributable to Indemnity - Basic Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted average shares outstanding attributable to Indemnity - Diluted Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract] Dividends, Common Stock, Cash-Class B Dividends declared, Class B This item represents cash received during the current period for dividends and interest on the entity's equity and debt investments, net of related administrative costs, and for rents received, net of related expenses. Net investment income received Proceeds From Investments, Net Cash payments for losses (the actual damage) made by an insurance company to settle claims, during the period. Payments For Losses Losses paid Limited partnerships Net cash outflow from limited partnership investments held by the entity for investment purposes. Payments For Limited Partnerships The net of the initial funding or additional funding of loans receivable to policy holders principally secured by the benefits under the policy and the cash inflow associated with the collection of policy loans receivable. Net policy loans Payments to Fund (Proceeds from Collection of) Policy Loans Sale of and returns on limited partnerships Net cash inflow from limited partnership investments held by the entity for investment purposes. Proceeds from Limited Partnerships Universal life deposits and interest 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. Proceeds from Universal Life Contracts 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. Includes currency on hand as well as demand deposits with banks or financial institutions pertaining to the noncontrolling interest. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the noncontrolling interest may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits should not be reported as cash and cash equivalents. Cash and cash equivalents Cash and Cash Equivalents at Carrying Value, Noncontrolling Interest Premiums receivable from policyholders The carrying amount as of the balance sheet date due the entity from (a) agents and insureds, (b) uncollected premiums and (c) others, net of the allowance for doubtful accounts pertaining to the noncontrolling interest. Premiums Receivable at Carrying Value, Noncontrolling Interest Reinsurance recoverable The known and estimated amount recoverable as of the balance sheet date from reinsurers for claims paid or incurred by the ceding insurer and associated claims settlement expenses, including estimated amounts for claims incurred but not reported, and policy benefits, net of any related valuation allowance pertaining to the noncontrolling interest. Reinsurance Recoverables, Noncontrolling Interest Deferred income taxes The aggregate tax effects as of the balance sheet date of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws; net of deducting the allocated valuation allowance, if any, to reduce such amount to net realizable value pertaining to the noncontrolling interest. Deferred Tax Assets, Net, Noncontrolling Interest Deferred acquisition costs Net amount of deferred policy acquisition costs capitalized on contracts remaining in force as of the balance sheet date pertaining to the noncontrolling interest. Deferred Policy Acquisition Costs, Noncontrolling Interest Other assets Carrying amount as of the balance sheet date of assets not otherwise specified in the taxonomy pertaining to the noncontrolling interest. Also serves as the sum of assets not individually reported in the financial statements, or not separately disclosed in notes pertaining to the noncontrolling interest. Other Assets, Noncontrolling Interest Investments This item represents the entire disclosure related to Investments in Certain Available-for-Sale Debt and Equity Securities (not including trading assets which are carried on the balance sheet at fair value and held for trading purposes) which include all debt and equity securities (including those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. A debt security represents a creditor relationship with an enterprise that is in the form of a security. 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. Investments In Available For-Sale Debt and Equity Securities and Equity Method Investments Disclosure [Text Block] Compensation Related Costs, General [Text Block] Incentive plans and deferred compensation Condensed Financial Information of Parent Company Only Disclosure [Text Block] Indemnity Supplemental Information EFL Supplemental Information Condensed Financial Information of Affiliate Company Only Disclosure [Text Block] This element can be used to encapsulate the entire condensed financial information disclosure, including the financial position, cash flows, and the results of operations of affiliates of the registrant as of the same dates or for the same periods for which audited consolidated financial statements are being presented. CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Statement, Scenario [Axis] Scenario, Unspecified [Domain] Dividends declared per share Dividends Declared Per Share [Abstract] Investments: Investments [Abstract] Liabilities Liabilities [Abstract] Marketable Securities, Realized Gain (Loss), Other than Temporary Impairments, Amount Cumulative effect of accounting changes, net of tax Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Gross unrealized holding gains on investments arising during period Other Comprehensive Income, Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax Reclassification adjustment for gross (gains) losses included in net income Other Comprehensive Income, Available-for-sale Securities Adjustment, before Tax Unrealized gains on investments Other Comprehensive Income, Available-for-sale Securities, Tax Income tax (expense) benefit related to unrealized gains (losses) Other Comprehensive Income, Available-for-sale Securities Adjustment, Net of Tax Other Comprehensive Income (Loss), Net of Tax Change in other comprehensive income (loss), net of tax Change in other comprehensive income, net of tax Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Income tax expense related to unrealized gains Balance, end of period Balance, beginning of period - Indemnity Accumulated Other Comprehensive Income (Loss), Net Of Tax, Balance As Previously Reported The amount of Accumulated Other Comprehensive Income (Loss) before any adjustments, as previously reported. Comprehensive Income, Net of Tax, Attributable to Noncontrolling Interest Less: Noncontrolling interest in consolidated entity - Exchange Comprehensive Income, Net of Tax, Attributable to Parent Total comprehensive income - Indemnity Accumulated other comprehensive loss: Other Comprehensive Income Loss, Net of Tax Period Increase (Decrease) [Rollforward] Reconciliation of Shareholders' Equity Stockholders' Equity Note Disclosure [Text Block] Reconciliation of Shareholders' Equity Statement, Business Segments [Axis] Segment, Business [Domain] Other Comprehensive Income (Loss) Net of Tax Period Increase Decrease Portion Attributable to Noncontrolling Interest Change in other comprehensive income, net of tax This element represents the portion of Other Comprehensive Income (Loss), Net of Tax, for the period pertaining to the noncontrolling interest. Includes deferred gains (losses) on qualifying hedges, unrealized holding gains (losses) on available-for-sale securities, minimum pension liability, and cumulative translation adjustment. Deferred Income Tax Liabilities Deferred income taxes