Accounting Policies [Abstract] Schedule of Investments [Table] Schedule of Investments [Table] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Private Equity Funds Private Equity Funds [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Maximum Maximum [Member] Schedule of Investments [Line Items] Schedule of Investments [Line Items] Percent of net assets Investment Owned, Percent of Net Assets Insurance [Abstract] Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table] Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Homeowners, Dwelling Fire and Other Liability Homeowners, Dwelling Fire and Other Liability [Member] Homeowners, Dwelling Fire and Other Liability [Member] Accident and Health Claim Accident and Health Insurance Product Line [Member] Short-duration Insurance Contracts, Accident Year [Axis] Short-duration Insurance Contracts, Accident Year [Axis] Short-duration Insurance Contracts, Accident Year [Domain] Short-duration Insurance Contracts, Accident Year [Domain] Accident Year 2010 Short-duration Insurance Contracts, Accident Year 2008 [Member] Accident Year 2011 Short-duration Insurance Contracts, Accident Year 2009 [Member] Accident Year 2012 Short-duration Insurance Contracts, Accident Year 2010 [Member] Accident Year 2013 Short-duration Insurance Contracts, Accident Year 2011 [Member] Accident Year 2014 Short-duration Insurance Contracts, Accident Year 2012 [Member] Accident Year 2015 Short-duration Insurance Contracts, Accident Year 2013 [Member] Accident Year 2016 Short-duration Insurance Contracts, Accident Year 2014 [Member] Accident Year 2017 Short-duration Insurance Contracts, Accident Year 2015 [Member] Accident Year 2018 Short-duration Insurance Contracts, Accident Year 2016 [Member] Accident Year 2019 Short-duration Insurance Contracts, Accident Year 2017 [Member] Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items] Incurred Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance Short-duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net IBNR Reserves Short-duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net Cumulative Number of Reported Claims Short-duration Insurance Contract, Cumulative Number of Reported Claims Cumulative Paid Claims and Allocated Claims Adjustment Expenses, Net of Reinsurance Short-duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net All outstanding liabilities before 2008, net of reinsurance Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net, Not Separately Presented Liabilities for claims and claim adjustment expenses, net of reinsurance Short-duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net 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] Measurement Frequency [Domain] Measurement Frequency [Domain] Recurring Basis Fair Value, Recurring [Member] Asset Class [Axis] Asset Class [Axis] Fair Value by Asset Class [Domain] Asset Class [Domain] Total Fixed Maturities Available-for-sale Securities [Member] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Interest rate swap Interest Rate Swap [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Equity Securities 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 Issuances: Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Issuances Settlements: Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements Transfers in/(out) of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net Ending balance The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) Interest Rate Swap Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Included in other comprehensive income Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) Purchases: Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Sales: Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Sales Issuances: Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Settlements: Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Transfers in/(out) of Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net Ending balance The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss) SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract] Schedule III. Supplementary Insurance Information SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Disclosure [Text Block] Stockholders' Equity Note [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 Stock Common Class A [Member] Title of Individual [Axis] Title of Individual [Axis] Title of Individual [Domain] Title of Individual [Domain] Directors Director [Member] Class of Stock [Line Items] Class of Stock [Line Items] Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Investments [Abstract] Available-for-sale Securities, Due in one year or less, Amortized Cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Available-for-sale Securities, Due in one year or less, Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Available-for-sale Securities, Due after one year through five years, Amortized Cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Available-for-sale Securities, Due after one year through five years, Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Available-for-sale Securities, Due after five years through ten years, Amortized Cost Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Available-for-sale Securities, Due after five years through ten years, Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Available-for-sale Securities, Due after ten years, Amortized Cost Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost Available-for-sale Securities, Due after ten years, Fair Value Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Fixed maturities, Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Available-for-sale Securities, Fair Value Available-for-sale Securities, Debt Securities, Fair Value Fair value of debt securities categorized neither as held-to-maturity nor trading. Held-to-maturity Securities, Due after one year through five years, Amortized Cost Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost Held-to-maturity Securities, Due after one year through five years, Fair Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Held-to-maturity Securities, Due after five years through ten years, Amortized Cost Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost Held-to-maturity Securities, Due after five years through ten years, Fair Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value Held-to-maturity Securities, Due after ten years, Amortized Cost Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Amortized Cost Held-to-maturity Securities, Due after ten years, Fair Value Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Held-to-maturity Securities, Amortized Cost Debt Securities, Held-to-maturity Debt Securities, Held-to-maturity, Fair Value Debt Securities, Held-to-maturity, Fair Value Reinsurance Disclosures [Abstract] Schedule of Reinsurance Reinsurance [Table Text Block] Reinsurance [Table Text Block] Income Statement [Abstract] REVENUES Revenues [Abstract] Net premiums earned Premiums Earned, Net Net investment income Net Investment Income Net investment gains (losses) Gain (Loss) on Investments Other income Other Income Total Revenues Revenues BENEFITS, LOSSES AND EXPENSES Operating Costs and Expenses [Abstract] Policyholder benefits and settlement expenses Policyholder Benefits and Claims Incurred, Net Amortization of deferred policy acquisition costs Deferred Policy Acquisition Costs, Amortization Expense Commissions Insurance Commissions General and administrative expenses General and Administrative Expense Taxes, licenses and fees Cost, Direct Tax and License Interest expense Interest Expense Total Benefits, Losses and Expenses Benefits, Losses and Expenses Income Before Income Taxes Income (Loss) from Continuing Operations before Income Taxes, Domestic INCOME TAX EXPENSE (BENEFIT) Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Current Federal Tax Expense (Benefit) Deferred Deferred Income Tax Expense (Benefit) Total income tax expense Income Tax Expense (Benefit) Net Income Net Income (Loss) Available to Common Stockholders, Basic INCOME PER COMMON SHARE BASIC AND DILUTED (in dollars per share) Earnings Per Share, Basic DIVIDENDS DECLARED PER SHARE (in dollars per share) Common Stock, Dividends, Per Share, Declared SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract] Schedule I. Summary of Investments Other Than Investments in Related Parties SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Text Block] Schedule of Liability for Life Insurance [Table] Schedule of Liability for Life Insurance [Table] Schedule of Liability for Life Insurance [Table] Years of Issue, 1947 - 1968 Life Insurance, Years of Issue, Range 1 [Member] Life Insurance, Years of Issue, Range 1 [Member] Years of Issue, 1969 - 1978 Life Insurance, Years of Issue, Range 2 [Member] Life Insurance, Years of Issue, Range 2 [Member] Years of Issue, 1979 - 2003 Life Insurance, Years of Issue, Range 3 [Member] Life Insurance, Years of Issue, Range 3 [Member] Years of Issue, 2004 - 2012 Life Insurance, Years of Issue, Range 4 [Member] Life Insurance, Years of Issue, Range 4 [Member] Years of Issue, 2013 - 2014 Life Insurance, Years of Issue, Range 5 [Member] Life Insurance, Years of Issue, Range 5 [Member] Years of Issue, 2015 - 2019 Life Insurance, Years of Issue, Range 6 [Member] Life Insurance, Years of Issue, Range 6 [Member] Minimum Minimum [Member] Schedule of Liability for Life Insurance [Line Items] Schedule of Liability for Life Insurance [Line Items] [Line Items] for Schedule of Liability for Life Insurance [Table] Interest Rate Liability for Future Policy Benefits, Interest Rate Debt Securities, Held-to-maturity [Table] Debt Securities, Held-to-maturity [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Agency mortgage backed securities Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] Schedule of Held-to-maturity Securities [Line Items] Schedule of Held-to-maturity Securities [Line Items] Amortized Cost Debt Securities, Held-to-maturity, Amortized Cost, before Other-than-temporary Impairment Held-to-maturity securities, unrealized gains Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain Held-to-maturity securities, unrealized losses Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss Fair Value Schedule of Stock by Class Schedule of Stock by Class [Table Text Block] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Table] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Table] Business Segments [Axis] Segments [Axis] Segment [Domain] Segments [Domain] Life Insurance Operations Life Insurance Product Line [Member] P&C Insurance Operations Property, Liability and Casualty Insurance Product Line [Member] Non-Insurance Operations Other Segments [Member] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items] SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost Supplementary Insurance Information, Future Policy Benefits SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Unearned Premium Supplementary Insurance Information, Unearned Premiums SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable Supplementary Insurance Information, Unpaid Losses SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income Supplementary Insurance Inforamtion, Other Income Supplementary Insurance Inforamtion, Other Income Supplementary Insurance Inforamtion, Other Income SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses Supplementary Insurance Information, Commissions and Amortization of Deferred Policy Acquisition Costs Supplementary Insurance Information, Commissions and Amortization of Deferred Policy Acquisition Costs Supplementary Insurance Information, Commissions and Amortization of Deferred Policy Acquisition Costs Supplementary Insurance Information, General Expenses, Taxes, Licenses and Fees SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense Net income Dividends paid Dividends, Cash Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax Common stock issued Stock Issued During Period, Value, New Issues Treasury stock acquired Treasury Stock, Value, Acquired, Cost Method Stock repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Shares of common stock repurchased and placed in treasury Treasury Stock, Common, Shares Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Software and Software Development Costs Software and Software Development Costs [Member] Building Building [Member] Equipment, Furniture and Fixtures Furniture and Fixtures [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Useful life Property, Plant and Equipment, Useful Life Income Tax Disclosure [Abstract] AMT Credit Deferred Tax Asset, AMT Credit Deferred Tax Asset, AMT Credit Recoveries Federal Income Tax Anticipated Recoveries in Current Year Federal Income Tax Anticipated Recoveries in Current Year Anticipated recoveries in next fiscal year Federal Income Tax Anticipated Recoveries in Next Fiscal Year Federal Income Tax Anticipated Recoveries in Next Fiscal Year Deferred income tax liability Deferred Tax Liabilities, Net Net deferred tax asset Deferred Tax Assets, Net Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Subsegments [Axis] Subsegments [Axis] Subsegments [Domain] Subsegments [Domain] Traditional life insurance Traditional Life Insurance [Member] Traditional Life Insurance [Member] Accident and health insurance Accident and Health Insurance [Member] Accident and Health Insurance [Member] Dwelling fire & extended coverage Dwelling Fire and Extended Coverage [Member] Dwelling Fire and Extended Coverage [Member] Homeowners (Including mobile homeowners) Homeowners (Including Mobile Homeowners) [Member] Homeowners (Including Mobile Homeowners) [Member] Other liability Insurance Product Line, Other liability [Member] Insurance Product Line, Other liability [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Gross premiums written Direct Premiums Written Reinsurance premium ceded Ceded Premiums Written Net premiums written Premiums Written, Net Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] VARIABLE INTEREST ENTITIES Variable Interest Entities [Text Block] Variable Interest Entities [Text Block] Deferred policy acquisition costs Income Tax Effects of Changes in Temporary Differences, Deferred Policy Acquisition Costs Income Tax Effects of Changes in Temporary Differences, Deferred Policy Acquisition Costs Other-than-temporary impairments Income Tax Effects of Changes in Temporary Differences, Other-than-temporary Impairments Income Tax Effects of Changes in Temporary Differences, Other-than-temporary Impairments Trading securities Income Tax Effects of Changes in Temporary Differences, Trading Securities Income Tax Effects of Changes in Temporary Differences, Trading Securities Unearned premiums Income Tax Effects of Changes in Temporary Differences, Unearned Premiums Income Tax Effects of Changes in Temporary Differences, Unearned Premiums General expenses Income Tax Effects of Changes in Temporary Differences, General Expenses Income Tax Effects of Changes in Temporary Differences, General Expenses Depreciation Income Tax Effects of Changes in Temporary Differences, Depreciation Income Tax Effects of Changes in Temporary Differences, Depreciation Claims liabilities Income Tax Effects of Changes in Temporary Differences, Claim Liabilities Income Tax Effects of Changes in Temporary Differences, Claim Liabilities AMT credit Income Tax Effects of Changes in Temporary Differences, AMT Credit Income Tax Effects of Changes in Temporary Differences, AMT Credit Impact of repeal of special provision on pre-1984 policyholder surplus Income Tax Effects of Changes in Temporary Differences, Tax Cuts and Jobs Act of 2017, Tax on pre-1984 policyholder surplus account Income Tax Effects of Changes in Temporary Differences, Tax on pre-1984 policyholder surplus account Unrealized gains (losses) on equity securities Income Tax Effects of Changes in Temporary Differences, Unrealized Gains on Equity Securities Income Tax Effects of Changes in Temporary Differences, Unrealized Gains on Equity Securities Deferred income tax expense (benefit) Supplemental Cash Flow Elements [Abstract] Interest paid Interest Paid, Including Capitalized Interest, Operating and Investing Activities Income taxes (received) paid Income Taxes Paid, Net Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock issued Stock Issued Increase in equity INVESTMENTS Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Operating lease, right-of-use asset Operating Lease, Right-of-Use Asset Operating lease, liability Operating Lease, Liability Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Changes in Temporary Differences in Federal Income Tax Changes in Temporary Differences in Federal Income Tax [Table Text Block] Presents the income tax effects of changes in temporary differences. Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] U.S. Government corporations and agencies US Government Agencies Debt Securities [Member] Asset backed securities Asset-backed Securities [Member] Private label mortgage backed securities Mortgage-backed Securities, Issued by Private Enterprises [Member] Corporate bonds Corporate Bond Securities [Member] States, municipalities and political subdivisions US States and Political Subdivisions Debt Securities [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Less than 12 Months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less than 12 Months, Gross Unrealized Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLossesI [2012-08] {Element Undeprecated} {Modified Documentation Label. Originally read as follows: This item represents the excess of amortized cost basis over fair value of securities that have been in a loss position for less than twelve months for those securities which are categorized neither as held-to-maturity nor trading securities.}{Modified Standard, Period Start, Period End, or Total Labels}{Modified References} 12 Months or Longer, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12 Months or Longer, Gross Unrealized Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLossesI [2012-08] {Element Undeprecated} {Modified Documentation Label. Originally read as follows: This item represents the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for those securities which are categorized neither as held-to-maturity nor trading securities.}{Modified Standard, Period Start, Period End, or Total Labels}{Modified References} Total Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Total Gross Unrealized Losses AvailableForSaleSecuritiesGrossUnrealizedLoss1 [2012-08] {Element Undeprecated} {Modified Documentation Label. Originally read as follows: This item represents the gross unrealized losses for securities which are categorized neither as held-to-maturity nor trading securities. Such gross unrealized losses are the excess of the carrying value of the Available-for-sale Securities over their fair value as of the reporting date. Such gross unrealized losses are included in other comprehensive income in the statement of shareholders' equity, unless the Available-for-sale Security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. Recognized in earnings is all or a portion of the unrealized holding loss, during the period of the hedge, of an Available-for-sale Security that is designated as being hedged in a fair value hedge, other than temporary declines in fair value below cost basis of equity securities, and debt securities which an other than temporary decline in fair value is due to credit losses or which the entity intends to sell or it is more likely than not that the entity will be required to sell the security before recovery of its amortized cost basis.}{Modified Standard, Period Start, Period End, or Total Labels}{Modified References} Total Securities in a Loss Position Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Foreign governments Debt Security, Government, Non-US [Member] Fixed maturities, Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Fixed maturities, Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Fixed maturities, Fair Value Debt Securities, Available-for-sale Equity securities, Amortized Cost Available-for-sale Equity Securities, Amortized Cost Basis Equity securities, Gross Unrealized Gains Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax Equity securities, Gross Unrealized Losses Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax Equity securities, Fair Value Available-for-sale Securities, Equity Securities Amortized Cost Available-for-sale Debt and Equity Securities, Amortized Cost Basis Available-for-sale Debt and Equity Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-sale Debt and Equity Securities, Accumulated Gross Unrealized Gain, before Tax Available-for-sale Debt and Equity Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Available-for-sale Debt and Equity Securities, Accumulated Gross Unrealized Loss, before Tax Available-for-sale Debt and Equity Securities, Accumulated Gross Unrealized Loss, before Tax Fair Value Available-for-sale Securities, Debt and Equity Securities Available-for-sale Securities, Debt and Equity Securities Equity [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Unrealized Gains (Losses) on Cash Flow Hedges Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Unrealized Gains (Losses) on Available-for-Sale Securities AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Beginning balance Accumulated Other Comprehensive Income (Loss), Net of Tax Other comprehensive gain before reclassifications Other Comprehensive Income (Loss), before Reclassifications, before Tax Reclassification adjustment - gains on equity securities Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Investment Transferred from Available-for-sale to Equity Method, before Tax Amounts reclassified from accumulated other comprehensive income (loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Other comprehensive income (loss), net of tax Ending balance INCOME TAXES Income Tax Disclosure [Text Block] General expenses Deferred Tax Asset, General Expenses Gross deferred tax asset associated with general expenses. Unearned premiums Deferred Tax Asset, Unearned Premiums Deferred tax asset associated with unearned premiums. Claims liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Impairment on real estate owned Deferred Tax Asset, Real Estate Impairment Deferred Tax Asset, Real Estate Impairment Unrealized losses on securities available-for-sale Deferred Tax Assets, Investments Unrealized loss on interest rate swaps Deferred Tax Asset, Unrealized Loss on Interest Rate Swaps Deferred tax asset on unrealized loss on interest rate swaps. Deferred tax assets Deferred Tax Assets, Gross Deferred Tax Liabilities, Unrealized Losses on Trading Securities Deferred Tax Liabilities, Unrealized Losses on Trading Securities Deferred Tax Liabilities, Unrealized Losses on Trading Securities Depreciation Deferred Tax Liabilities, Property, Plant and Equipment Deferred policy acquisition costs Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost Pre-1984 policyholder surplus account Deferred Tax Liability, Tax Cuts and Jobs Act of 2017, Pre- 1984 Policyholder Surplus Account Deferred Tax Liability, Pre- 1984 Policyholder Surplus Account Unrealized gains on securities available-for-sale Deferred Tax Liabilities, Investments Unrealized gains on equity securities Deferred Tax Liabilities, Unrealized Gains on Trading Securities Deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax asset (liability) Net Deferred Tax Assets (Liabilities) Net Deferred Tax Assets (Liabilities) Schedule of Gain (Loss) on Securities [Table] Schedule of Gain (Loss) on Securities [Table] Debt Security Category [Axis] Debt Security Category [Axis] Gain (Loss) on Investments, Including Marketable Securities and Investments Held at Cost, Categories of Investments [Domain] Other than Temporary Impairment, Credit Losses Recognized in Earnings, Categories of Investments [Domain] Realized gains on fixed maturities Fixed Maturities [Member] Equity securities Equity Securities [Member] Change in fair value of equity securities Change in fair value of equity securities [Member] Change in fair value of equity securities [Member] Change in surrender value of company owned life insurance Change in Surrender Value of Company Owned Life Insurance [Member] Change in Surrender Value of Company Owned Life Insurance [Member] Realized gain on company owned life insurance Realized Gain on Company Owned Life Insurance [Member] Realized Gain on Company Owned Life Insurance [Member] Other gains (losses), principally real estate Other, Principally Real Estate [Member] Other, Principally Real Estate [Member] Gain (Loss) on Securities [Line Items] Gain (Loss) on Securities [Line Items] Other-than-temporary impairments Other than Temporary Impairment Losses, Investments Gains on trading securities Debt Securities, Trading, Gain (Loss) Reinsurance [Abstract] Reinsurance [Abstract] Schedule IV. Reinsurance SEC Schedule, 12-17, Insurance Companies, Reinsurance [Text Block] Condensed Financial Information of Registrant [Abstract] Condensed Financial Information of Registrant [Abstract] Condensed Financial Statements [Table] Condensed Financial Statements [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Parent Company Parent Company [Member] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] ASSETS Assets [Abstract] Fixed maturities available-for-sale, at estimated fair value Investment real estate, at book value Real Estate Investment Property, at Cost Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Investment in subsidiaries (equity method) eliminated upon consolidation Investment in Subsidiaries Investment in Subsidiaries Income tax recoverable Income Taxes Receivable Deferred income tax asset Other assets Other Assets Total Assets Assets LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Accrued general expenses Accounts Payable and Accrued Liabilities Interest rate swaps Interest Rate Swaps Interest Rate Swaps Short-term notes payable and current portion of long-term debt Debt, Current Notes Payable Notes Payable Total Liabilities Liabilities Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent Total Liabilities and Shareholders' Equity Liabilities and Equity Commitments and Contingencies Disclosure [Abstract] CONTINGENCIES Contingencies Disclosure [Text Block] Property, Plant and Equipment [Abstract] PROPERTY AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Financial Liabilities Derivative Financial Instruments, Liabilities [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Trading securities Debt Securities, Trading Total Financial Assets Derivative Asset Total Financial Liabilities Derivative Liability Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Held-to-maturity securities Held-to-maturity Securities [Member] Mortgage loans on real estate Mortgages [Member] Policy loans Policy Loans [Member] Company owned life insurance Cash Surrender Value [Member] Other invested assets Other Long-term Investments [Member] Other policyholder funds Insurance Claims [Member] Short-term notes payable and current portion of long-term debt Short-term Debt [Member] Long-term debt Long-term Debt [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Assets and Related Instruments [Abstract] Assets and Related Instruments [Abstract] Assets and Related Instruments [Abstract] Carrying Value, Assets Carrying Value of Assets Carrying value of assets on the balance sheet. Estimated Fair Value, Assets Estimated Fair Value, Assets Estimated fair value of assets. Liabilities and Related Instruments [Abstract] Liabilities and Related Instruments [Abstract] Liabilities and Related Instruments [Abstract] Carrying Value, Liabilities Carrying Value of Liabilities Carrying vlue of liabilities on the balance sheet. Estimated Fair Value, Liabilities Estimated Fair Value, Liabilities Estimated fair value ofl liabilities. Nonrecurring Basis Fair Value, Nonrecurring [Member] Assets, fair value Assets, Fair Value Disclosure Liabilities, fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Fair value measurements of assets Fair value measurements of liabilities SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Table] SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Table] Fixed maturities Investment real estate Real Estate Investment [Member] Other Other, Principally Short-term Investments [Member] Other, Principally Short-term Investments [Member] SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items] Gross investment income Gross Investment Income Gross Investment Income Less: Investment expenses Investment Income, Investment Expense Net investment income Federal income tax rate applied to pre-tax income/loss Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Statement of Financial Position [Abstract] Investments Fixed maturities held-to-maturity, at estimated fair value Fixed maturities available-for-sale, at cost Equity securities, at cost Treasury stock (in shares) Treasury Stock, Shares Schedule of Liability for Future Policy Benefits Schedule of Liability for Future Policy Benefits, by Product Segment [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table] 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 Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Net investment gains Total before tax Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Tax expense Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Treasury Stock Treasury Stock [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance Cumulative effect of change in accounting principle Cumulative Effect of New Accounting Principle in Period of Adoption Common stock reacquired Comprehensive income (loss): Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Other comprehensive income (loss) (net of tax) Cash dividends Balance Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Comprehensive Income (Loss) Note [Text Block] Principles of Consolidation and Basis of Presentation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Concentration of Risk Concentration Risk Policy [Policy Text Block] Concentration Risk Policy [Policy Text Block] Investments Investment, Policy [Policy Text Block] Fair Values of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Policy Receivables Premiums Receivable, Basis of Accounting, Policy [Policy Text Block] Accounts Receivable Receivable [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Leases Lessee, Leases [Policy Text Block] Statement of Cash Flows Cash and Cash Equivalents, Policy [Policy Text Block] Premium Revenue Insurance Premiums Revenue Recognition, Policy [Policy Text Block] Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs, Policy [Policy Text Block] Policy Liabilities Liability for Future Policy Benefit [Policy Text Block] Policyholder Benefit and Claim Settlement Expenses Unpaid Policy Claims and Claims Adjustment Expense, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Reinsurance Reinsurance Accounting Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Contingencies Commitments and Contingencies, Policy [Policy Text Block] Reclassifications Reclassification, Policy [Policy Text Block] Advertising Advertising Cost [Policy Text Block] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Treasury Shares Treasury Shares Policy [Policy Text Block] Treasury Shares Policy [Policy Text Block] Accounting Changes Not Yet Adopted and Recently Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Consolidation, Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Derivatives Derivatives, Policy [Policy Text Block] Business Segment Segment Reporting, Policy [Policy Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of Fair Value, by Balance Sheet Grouping Fair Value, by Balance Sheet Grouping [Table Text Block] Scheule II. Condensed Financial Information of Registrant Condensed Financial Information of Parent Company Only Disclosure [Text Block] Reinsurance Maintained by Layers [Table] Reinsurance Maintained by Layers [Table] Reinsurance Maintained by Layers [Table] Reinsurance Layers [Axis] Reinsurance Layers [Axis] Reinsurance Layers [Axis] Reinsurance Layers [Domain] Reinsurance Layers [Domain] Reinsurance Layers [Domain] First Layer Layer 1 [Member] Layer 1 of the reinsurance contract covers losses above the Company's retention up to the coverage amount for the layer. Second Layer Layer 2 [Member] Layer 2 of the reinsurance contract covers losses above contract Layer 1 up to the coverage amount for the layer. Third Layer Layer 3 [Member] Layer 3 of the reinsurance contract covers losses above contract Layer 2 up to the coverage amount for the layer. Underlying 2nd Event Layer 4 [Member] Layer 4 [Member] Reinsurance Policy, Type [Axis] Reinsurance Policy, Type [Axis] Reinsurance Policy [Domain] Reinsurance Policy [Domain] First Catastrophe Event First Catastrophe Event [Member] First Catastrophe Event [Member] Second Catastrophe Event Second Catastrophe Event [Member] Second Catastrophe Event [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Single Reinsurer Single Reinsurer [Member] Single Reinsurer [Member] Reinsurance Maintained by Layers [Line Items] Reinsurance Maintained by Layers [Line Items] Reinsurance Maintained by Layers [Line Items] Catastrophe reinsurance retention Catastrophe Reinsurance Retention Catastrophe Reinsurance Retention is the amount of losses from a single event retained by the Company before the catastrophe reinsurance contract begins to cover losses. Percent of reinsured losses covered by layer Percent of Reinsured Losses Ceded by Layer Percent of reinsured losses ceded by layer under reinsurance contract. Covered losses Covered Losses Range of losses covered above the Company's retention and preceding layer. Losses in the range may be subject to coinsurance as specified in the contract terms. Reinsurer's limit of liability Reinsurer's Limit of Liability Reinsurer's limit of liability by layer. May include co-insurance based on percent of ceded losses specified by layer. Life insurance policy reinsurance limit Individual Life Policy Maximum Retention Individual Life Policy Maximum Retention Reinsurance recoverable Reinsurance Recoverables, Including Reinsurance Premium Paid Significant Accounting Policies (Concentration of Risk) [Abstract] Significant Accounting Policies (Concentration of Risk) [Abstract] Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Segment Revenue, Segment Benchmark [Member] Product Concentration Risk Product Concentration Risk [Member] Geographic Concentration Risk Geographic Concentration Risk [Member] Direct Written Premium Direct Written Premium [Member] Direct Written Premium [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Concentration risk, percentage Concentration Risk, Percentage Number of states in which entity operates Number of States in which Entity Operates Number of major customers Number of Major Customers Number of Major Customers Statutory Accounting Practices [Abstract] Statutory Accounting Practices [Abstract] Statutory Accounting Practices Disclosure Statutory Accounting Practices Disclosure [Table Text Block] Net income Net Income (Loss) Attributable to Parent Adjustments to reconcile net income to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Equity in undistributed earnings of subsidiaries Equity in Undistributed Earnings of Subsidiaries Equity in Undistributed Earnings of Subsidiaries Net realized investment gains (losses) Realized Investment Gains (Losses) Income taxes Other, net Other Noncash Income (Expense) Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Net Cash Provided by (Used in) Investing Activities [Abstract] Net sales of investments Sale (Purchases) of Investments Sale (Purchases) of Investments Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net Cash Provided by (Used in) Financing Activities [Abstract] Net repayments of debt Proceeds from (Repayments of) Notes Payable Cash dividends Payments of Dividends Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of year Cash and cash equivalents, end of period Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Gross and Net Premiums Written Gross and Net Written Premiums [Table Text Block] Presentation of gross and net written premiums of insurance subsidiaries. Schedule of Gross and Net Premiums Earned Gross and Net Premiums Earned [Table Text Block] Presentation of gross and net premiums earned of insurance subsidiaries. Retirement Benefits [Abstract] EMPLOYEE BENEFIT PLANS Compensation and Employee Benefit Plans [Text Block] Schedule of Property and Equipment Property, Plant and Equipment [Table Text Block] SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Segment Reporting [Abstract] Number of operating segments Number of Operating Segments Schedule of Condensed Financial Statements [Abstract] Schedule of Condensed Financial Statements [Abstract] Subsidiaries Subsidiaries [Member] Cash dividends paid to parent company by consolidated subsidiaries SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries Debt Disclosure [Abstract] Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Notes Payable to Banks Notes Payable to Banks [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Unsecured Debt Unsecured Debt [Member] Short-term Debt [Line Items] Short-term Debt [Line Items] Interest rate description Line of Credit Facility, Interest Rate Description Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Gross premiums earned Direct Premiums Earned Reinsurance premium ceded Ceded Premiums Earned Net premiums earned 2020 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2021 Long-term Debt, Maturities, Repayments of Principal in Year Two 2022 Long-term Debt, Maturities, Repayments of Principal in Year Three 2023 Long-term Debt, Maturities, Repayments of Principal in Year Four 2024 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Promissory Note Promissory Note [Member] Promissory Note [Member] Trust Preferred Security Offering, 2005 Trust Preferred Security Offering, 2005 [Member] Subordinated debentures issued on December 15, 2005 with fixed interest rate of 8.83% each distribution period thereafter until December 15, 2015 when the coupon rate shall equal the 3-month LIBOR plus 3.75% applied to the outstanding principal; maturity December 2035. Interest payments due quarterly. All may be redeemed at any time following the tenth anniversary of issuance. Unsecured. Trust Preferred Security Offering, 2007 Trust Preferred Security Offering, 2007 [Member] Subordinated debentures issued on June 21, 2007 with a floating interest rate equal to the 3 Month LIBOR plus 3.40% applied to the outstanding principal; maturity June 15, 2037. Interest payments due quarterly. All may be redeemed at any time following the fifth anniversary of issuance. Unsecured. Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Three-month LIBOR London Interbank Offered Rate (LIBOR) [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term debt Long-term Debt Payment terms Debt Instrument, Payment Terms Debt issuance costs, net Debt Issuance Costs, Net SHAREHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] NOTES PAYABLE AND LONG-TERM DEBT Debt Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized gains (losses) on securities, net of reclassification adjustment of $14 and $100 for 2019 and 2018, respectively Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax Unrealized gain on interest rate swap Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Income Dividends (eliminated upon consolidation) Dividend Income, Operating Net realized investment gains Holding company management service fees Revenue from Contract with Customer, Including Assessed Tax Expenses Operating Expenses [Abstract] State taxes Current State and Local Tax Expense (Benefit) Other expenses Other Expenses Operating Expenses Operating Expenses Income before income taxes and equity in undistributed earnings of subsidiaries Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense (benefit) Income before equity in undistributed earnings of subsidiaries Income Before Income Taxes and Undistributed Earnings (Loss) of Subsidiaries Income Before Income Taxes and Undistributed Earnings (Loss) of Subsidiaries Equity in undistributed earnings of subsidiaries Net income Cover page. Document Type Document Type Document Annual Report Document Annual Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Statutory Accounting Practices [Table] Statutory Accounting Practices [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] NSIC NSIC [Member] NSIC [Member] NSFC NSFC [Member] NSFC [Member] Omega Omega [Member] Omega [Member] Statutory Accounting Practices [Line Items] Statutory Accounting Practices [Line Items] Statutory Accounting Practices, Statutory Net Income Amount Statutory Accounting Practices, Statutory Net Income Amount Tier One Risk Based Capital Tier One Risk Based Capital Asset Valuation Reserve Asset Valuation Reserve Asset Valuation Reserve Investment in Omega One Investment in Omega One Investment in Omega One Regulatory Requirements and Dividend Restrictions [Abstract] Regulatory Requirements and Dividend Restrictions [Abstract] REGULATORY REQUIREMENTS AND DIVIDEND RESTRICTIONS Regulatory Requirements and Dividend Restrictions [Text Block] Regulatory Requirements and Dividend Restrictions [Text Block] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Allowance for Doubtful Accounts SEC Schedule, 12-09, Allowance, Credit Loss [Member] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Balance, January 1 Allowance for Doubtful Accounts SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Additions SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Deletions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Balance, December 31 Allowance for Doubtful Accounts Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table] Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Table] Homeowners' insurance Property Insurance [Member] Dwelling fire insurance Dwelling Fire Insurance [Member] Dwelling Fire Insurance [Member] Other Liability insurance Other Liability Insurance [Member] Other Liability Insurance [Member] Other short-duration insurance lines Short-Duration Insurance, Other [Member] Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] Short-duration Insurance Contracts, Reconciliation of Claims Development to Liability [Line Items] Liabilities for unpaid claims and claim adjustment expenses, net of reinsurance Total reinsurance recoverable on unpaid claims Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Insurance lines other than short-duration Liability for Unpaid Claims and Claims Adjustment Expense, Accumulated Unallocated Claim Adjustment Expense Liability for Unpaid Claims and Claims Adjustment Expense, Accumulated Unallocated Claim Adjustment Expense Unallocated claims adjustment expenses Short-duration Insurance Contracts, Liability for Unpaid Claims and Claims Adjustment Expense, Accumulated Unallocated Claim Adjustment Expense Other Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Other Reconciling Item Aggregate reconciling items Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Aggregate Reconciling Items Total gross liability for unpaid claims and claim adjustment expense Liability for Claims and Claims Adjustment Expense Fixed maturities held-to-maturity, at amortized cost (estimated fair value: 2019 - $1,345; 2018 - $1,443) Fixed maturities available-for-sale, at estimated fair value (cost: 2019 - $97,102; 2018 - $96,877) Equity securities, at estimated fair value (cost: 2019 - $2,127; 2018 - $1,842) Trading securities Debt Securities, Trading, and Equity Securities, FV-NI Receivable for securities sold Receivable for Securities Sold Receivable for Securities Sold Mortgage loans on real estate, at cost SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate Policy loans Policy Loans Receivable Company owned life insurance Life Insurance, Corporate or Bank Owned, Amount Other invested assets Other Investments Total Investments Investments Accrued investment income Accrued Investment Income Receivable Policy receivables and agents' balances, net Premiums and Other Receivables, Net Deferred policy acquisition costs Deferred Policy Acquisition Cost Property and equipment, net Property, Plant and Equipment, Net Income tax recoverable Income Taxes Receivable, Current Deferred income tax asset, net Property and casualty benefit and loss reserves Liability for Claims and Claims Adjustment Expense, Property Casualty Liability Accident and health benefit and loss reserves Liability for Claims and Claims Adjustment Expense, Disability, Accident and Health Life and annuity benefit and loss reserves Liability for Future Policy Benefits, Life Unearned premiums Unearned Premiums Policy and contract claims Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense Other policyholder funds Policyholder Account Balance Accrued income taxes Accrued Income Taxes Deferred income tax liability Other liabilities Other Liabilities Contingencies Commitments and Contingencies Shareholders' equity Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive income (loss) Retained earnings Retained Earnings (Accumulated Deficit) Treasury stock, at cost, 436 shares Treasury Stock, Value Total Shareholders' Equity SUPPLEMENTAL CASH FLOW INFORMATION Cash Flow, Supplemental Disclosures [Text Block] Short-duration Insurance Contracts, Historical Claims Duration [Table] Short-duration Insurance Contracts, Historical Claims Duration [Table] Short-duration Insurance Contracts, Historical Claims Duration [Line Items] Short-duration Insurance Contracts, Historical Claims Duration [Line Items] Average Annual Percentage Payout of Incurred Claims by Age (in Years), Net of Reinsurance, year 1 Short-duration Insurance Contracts, Historical Claims Duration, Year One Average Annual Percentage Payout of Incurred Claims by Age (in Years), Net of Reinsurance, year 2 Short-duration Insurance Contracts, Historical Claims Duration, Year Two Average Annual Percentage Payout of Incurred Claims by Age (in Years), Net of Reinsurance, year 3 Short-duration Insurance Contracts, Historical Claims Duration, Year Three Average Annual Percentage Payout of Incurred Claims by Age (in Years), Net of Reinsurance, year 4 Short-duration Insurance Contracts, Historical Claims Duration, Year Four Average Annual Percentage Payout of Incurred Claims by Age (in Years), Net of Reinsurance, year 5 Short-duration Insurance Contracts, Historical Claims Duration, Year Five Average Annual Percentage Payout of Incurred Claims by Age (in Years), Net of Reinsurance, year 6 Short-duration Insurance Contracts, Historical Claims Duration, Year Six Average Annual Percentage Payout of Incurred Claims by Age (in Years), Net of Reinsurance, year 7 Short-duration Insurance Contracts, Historical Claims Duration, Year Seven Average Annual Percentage Payout of Incurred Claims by Age (in Years), Net of Reinsurance, year 8 Short-duration Insurance Contracts, Historical Claims Duration, Year Eight Average Annual Percentage Payout of Incurred Claims by Age (in Years), Net of Reinsurance, year 9 Short-duration Insurance Contracts, Historical Claims Duration, Year Nine Average Annual Percentage Payout of Incurred Claims by Age (in Years), Net of Reinsurance, year 10 Short-duration Insurance Contracts, Historical Claims Duration, Year Ten Total Securities Securities (Assets) [Member] Trading Security Trading Security [Member] Trading Security [Member] Company owned life insurance change in surrender value Company Owned Life Insurance [Member] Company Owned Life Insurance [Member] Other invested assets Other Investments [Member] Total Debt Securities Debt Securities [Member] Banks and insurance companies Banks, Trust and Insurance, Equities [Member] Industrial and all other Industrial, Miscellaneous, and All Others [Member] SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Cost SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Fair Value SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount Building and improvements Building and improvements [Member] Building and improvements [Member] Electronic data processing equipment Electronic Data Processing Equipment [Member] Electronic Data Processing Equipment [Member] Furniture and fixtures Property and equipment, gross Property, Plant and Equipment, Gross Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Depreciation expense Depreciation Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Executive Officers Executive Offisers [Member] Executive Offisers [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Non-Qualified Deferred Compensation Plans Non-Qualified Deferred Compensation Plans [Member] Non-Qualified Deferred Compensation Plans [Member] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Minimum hours of service completed in year of contribution Defined Contribution Plan, Minimum Hours of Service Completed in Year of Contribution Defined Contribution Plan, Minimum Hours of Service Completed in Year of Contribution Matching contribution Defined Contribution Plan, Cost Employer matching contribution, percent Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Deferred compensation arrangement Deferred Compensation Arrangement with Individual, Compensation Expense Cash contributions to ESOP Employee Stock Ownership Plan (ESOP), Cash Contributions to ESOP ESOP debt structure Employee Stock Ownership Plan (ESOP), Debt Structure, Indirect Loan, Amount Consolidated Property and Casualty Insurance Entity SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters, Consolidated Property and Casualty Insurance Entity [Member] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Balance, beginning of year Less reinsurance recoverable on unpaid losses Net balances at beginning of year Liability for Unpaid Claims and Claims Adjustment Expense, Net Net losses: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Provision for claims and claim adjustment expenses for claims arising in current year Current Year Claims and Claims Adjustment Expense Estimated claims and claim adjustment expenses for claims arising in prior years Prior Year Claims and Claims Adjustment Expense Total increases Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Claims and claim adjustment expense payments for claims arising in: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Total payments Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid POLICY AND CLAIM RESERVES Policy and Claim Reserves [Text Block] Policy and Claim Reserves [Text Block] Statement of Cash Flows [Abstract] Cash Flows from Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Depreciation expense and amortization/accretion, net Depreciation, Amortization and Accretion, Net Net (gains) losses on investments Deferred income taxes Increase (Decrease) in Deferred Income Taxes Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Change in receivable for securities sold Increase (Decrease) in Receivable for Securities Sold Increase (Decrease) in Receivable for Securities Sold Change in accrued investment income Increase (Decrease) in Accrued Investment Income Receivable Change in reinsurance recoverable Increase (Decrease) in Reinsurance Recoverable Policy acquisition costs deferred Increase (Decrease) in Deferred Policy Acquisition Costs Change in accrued income taxes Increase (Decrease) in Income Taxes Payable Change in net policy liabilities and claims Increase (Decrease) in Insurance Liabilities Change in other assets/liabilities, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Other, net Cash Flows from Investing Activities Available-for-sale securities Payments to Acquire Available-for-sale Securities Trading securities and short-term investments Payments to Acquire Trading Securities Held-for-investment Property and equipment Payments to Acquire Property, Plant, and Equipment Held-to-maturity securities Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities Available-for-sale securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Real estate held for investment Proceeds from Sale of Real Estate Held-for-investment Proceeds from company owned life insurance Proceeds from Life Insurance Policy Other invested assets, net Payments for (Proceeds from) Other Investing Activities Cash Flows from Financing Activities Change in other policyholder funds Increase (Decrease) in Other Policyholder Funds Change in short-term notes payable Proceeds from (Repayments of) Short-term Debt Dividends paid Payments of Ordinary Dividends, Common Stock Net change in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents, beginning of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents, end of period Percent of investment portfolio below investment grade Percent of Investment Portfolio Below Investment Grade Percentage of investment portfolio with ratings below investment grade. Other-than-temporary impairments, available-for-sale securities Other than Temporary Impairment Losses, Investments, Available-for-sale Securities Single largest loss position Single Largest Loss Position Single Largest Loss Position Second largest loss position Second Largest Loss Position Second Largest Loss Position Third largest loss position Third Largest Loss Position Third Largest Loss Position Statutory amount available for dividend payments Statutory Accounting Practices, Statutory Amount Available for Dividend Payments Assets held by insurance regulators Assets Held by Insurance Regulators Company owned life insurance policy face amount Company Owned Life Insurance Policy Face Amount Face amount of individual policies on select individuals. Payments to acquire life insurance policies Payment to Acquire Life Insurance Policy, Investing Activities Cash surrender value of life insurance Cash Surrender Value of Life Insurance Increase (decrease) in cash surrender value of company owned life insurance Life Insurance, Corporate or Bank Owned, Change in Value Subsequent Events [Abstract] SUBSEQUENT EVENTS Subsequent Events [Text Block] Schedule of Short-term Debt Schedule of Short-term Debt [Table Text Block] Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Catastrophic Event [Axis] Catastrophic Event [Axis] Catastrophic Event [Domain] Catastrophic Event [Domain] Hurricane Hurricane [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Texas TEXAS Loss Contingencies [Line Items] Loss Contingencies [Line Items] Pending claims, number Loss Contingency, Pending Claims, Number Estimated claims and claim adjustment expenses for claims arising in prior years Reserve for unpaid claims Liability for Unpaid Claims and Claims Adjustment Expense, Adjustments Catastrophe Catastrophe [Member] Claims and claim adjustment expense payments for claims arising in prior year Average annual payout of incurred claims settled within twelve months Average annual payout of incurred claims settled within twenty four months Short-duration Insurance Contracts, Historical Claims Duration, Years One and Two Short-duration Insurance Contracts, Historical Claims Duration, Years One and Two Collateral [Axis] Collateral [Axis] Collateral [Domain] Collateral [Domain] Collateral Pledged [Member] Collateral Pledged [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash flow hedging Cash Flow Hedging [Member] Derivative, notional amount Derivative, Notional Amount Derivative, fixed interest rate Derivative, Fixed Interest Rate Cash flow hedge, liability at fair value Interest Rate Cash Flow Hedge Liability at Fair Value Cash flow hedge, derivative instrument liabilities at fair value Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Unrealized gain on interest rate swap