Document And Entity Information Statistical Measurement [Axis] Note To Financial Statement Details Textual us-gaap_InvestmentIncomeNet Net investment income Significant Accounting Policies us-gaap_IncomeTaxExpenseBenefit Total federal income tax expense Investment, Policy [Policy Text Block] Supplemental Disclosure - Cash and Non-cash Impact on Operating, Investing and Financing Activities ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 1 - Organization and Significant Accounting Policies us-gaap_InvestmentIncomeInvestmentExpense Investment expenses ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note 2 - Investments Trading Arrangements, by Individual [Table] Note 3 - Fair Value Measurements Material Terms of Trading Arrangement [Text Block] Schedule of Real Estate Properties [Table Text Block] Note 4 - Segment Data Note 7 - Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income Financial Instrument [Axis] Note 8 - Allowance for Loan Losses From Mortgage Loans on Real Estate Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Note 9 - Deferred Policy Acquisition Costs Note 10 - Liability for Future Policy Benefits Securities, gross unrealized losses us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax Note 11 - Policyholders' Account Balances Securities, gross unrealized gains us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax Supplemental Disclosure - Cash and Non-cash Impact on Operating, Investing and Financing Activities (Details) us-gaap_Investments Total investments Statistical Measurement [Domain] Note 1 - Organization and Significant Accounting Policies - Schedule of Change in Accounting Principle (Details) Investments Maximum [Member] Note 2 - Investments - Available-for-sale Fixed Maturity and Equity Securities (Details) Note 2 - Investments - Securities in an Unrealized Loss Position (Details) Residential Real Estate - Held for Sale [Member] Related to residential real estate that is held for sale. Income before income taxes us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic Income before total federal income tax expense Income (loss) before federal income taxes (benefits) us-gaap_IncreaseDecreaseInAccountsReceivable Agents' balances and due premiums Note 2 - Investments - Change in Estimate of Credit Losses (Details) Note 2 - Investments - Net Unrealized Gains Included in Accumulated Other Comprehensive Income (Details) Note 2 - Investments - Schedule of Other Long-term Investments (Details) Note 2 - Investments - Fixed Maturity Available-for-sale Securities by Contractual Maturities (Details) Note 2 - Investments - Proceeds and Gross Realized Gains (Losses (Details) us-gaap_OtherInvestments Other Investments Office Building [Member] Note 2 - Investments - Major Categories of Net Investment Income (Details) Hotel [Member] Note 2 - Investments - Mortgage Loans on Real Estate (Details) Industrial Property [Member] Note 2 - Investments - Investment Real Estate (Details) ftfc_UnrealizedAppreciationDepreciationOnOtherLongtermInvestments Other long-term investments The amount of unrealized appreciation/depreciation on other long-term investments. Apartment Building [Member] Note 3 - Fair Value Measurements - Fair Value Measured on a Recurring Basis (Details) Schedule of Other Long-term Investments [Table Text Block] The entire tabular disclosure for other investments classified as long-term. Note 3 - Fair Value Measurements - Change in Fair Value of Available-for-sale Equity Securities (Details) Commercial Mortgage-Backed Securities [Member] Note 3 - Fair Value Measurements - Estimated Fair Values of Financial Instruments (Details) Note 4 - Segment Data - Segment Data - Operations (Details) Counterparty Name [Axis] Note 4 - Segment Data - Reconciliation of Assets from Segment to Consolidated (Details) Note 4 - Segment Data - Increase (Decrease) in Revenues (Details) Note 7 - Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Loss (Details) Total benefits and claims Amount of costs deferred net of amortization expense (reversal of expense) for deferred policy acquisition costs. Note 7 - Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income - Other Comprehensive Income (Loss) (Details) ftfc_DeferredPolicyAcquisitionCostsOperating Policy acquisition costs deferred Capitalized sales costs that are associated with acquiring new insurance customers. Note 7 - Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Income - Reclassified From Accumulated Other Comprehensive Income (Loss) (Details) Note 8 - Allowance for Loan Losses From Mortgage Loans On Real Estate - Allowance for Loss on Premium Financing (Details) ftfc_MortgageLoansOnRealEstateNetOfUnearnedInterest Total mortgage loans held in trust under coinsurance agreement The balance amount of mortgage loans on real estate, after unearned interest. Conversion of Common Stock Class B into Common Stock Class A [Member] Represents conversion of common stock class B into common stock class A. Note 8 - Allowance for Loan Losses From Mortgage Loans on Real Estate - Mortgage Loan to Value Ratios (Details) ftfc_ConversionOfStockNumberOfStockConvertibleByEachShare Conversion of Stock, Number of Stock Convertible by Each Share (in shares) Number of stock convertible by each share. Note 9 - Deferred Policy Acquisition Costs - Deferred Acquisition Costs (Details) ftfc_PercentageOfDividendsReceivedUponMergerOrLiquidationActivity Percentage of Dividends Received Upon Merger or Liquidation Activity Represents percentage of dividends will be received upon merger or liquidation activity. us-gaap_DividendsCash Dividends, Cash Note 10 - Liability for Future Policy Benefits - Schedule of Future Policy Benefit Activity (Details) Financial Instruments [Domain] Agriculture [Member] Agriculture. us-gaap_Land Land Note 11 - Policyholders' Account Balances - Deposit Liabilities (Details) Note 11 - Policyholders' Account Balances - Range of Credit Ratings (Details) Counterparty Name [Domain] Note 11 - Policyholders' Account Balances - Schedule of Policyholders' Account Balances (Details) Notes To Financial Statements Notes To Financial Statements [Abstract] Securities in an unrealized loss position, less than twelve months, number us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions us-gaap_IncreaseDecreaseInLifeInsuranceLiabilities Policy claims Securities in an unrealized loss position, more than twelve months, number us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions Segment Reporting [Text Block] Securities in an unrealized loss position, more than twelve months, fair value us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger Sale of real estate Proceeds from Sale, Real Estate, Held-for-Investment Securities in an unrealized loss position, less than twelve months, fair value us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months Adjustments to reconcile net income to net cash provided by operating activities: Segment Reporting [Table Text Block] us-gaap_Liabilities Total liabilities Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block] Pending Litigation [Member] Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] Litigation Status [Axis] Litigation Status [Domain] us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and shareholders' equity Consolidation Items [Axis] Policy Loans [Member] us-gaap_PolicyLoansReceivable Policy loans Consolidation Items [Domain] Change in assets and liabilities: Portion at Fair Value Measurement [Member] Reported Value Measurement [Member] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Decrease in cash and cash equivalents Other underwriting, insurance and acquisition expenses us-gaap_CashAndCashEquivalentsFairValueDisclosure Cash and cash equivalents Estimate of Fair Value Measurement [Member] us-gaap_CommonStockDividendsPerShareCashPaid Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) Agents' balances and due premiums New Accounting Pronouncements, Policy [Policy Text Block] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Statement [Table] Reclassification, Comparability Adjustment [Policy Text Block] Premiums Receivable Note [Text Block] us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense Policy claims Securities in an unrealized loss position, unrealized loss us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Securities in an unrealized loss position, fair value us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition Debt Securities, Available-for-Sale, Unrealized Loss Position Equity securities at fair value (cost: $5,816,243 and $5,677,164 as of June 30, 2026 and December 31, 2025, respectively) us-gaap_EquitySecuritiesFvNi Equity securities Equity Securities [Member] Securities in an unrealized loss position, number us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Financing Receivable, Allowance for Credit Loss [Table Text Block] Equity securities us-gaap_EquitySecuritiesFvNiRealizedGainLoss us-gaap_EscrowDeposit Escrow Deposit Equity Securities, FV-NI, Cost Other income Financing Receivable Credit Quality Indicators [Table Text Block] Product and Service [Domain] Product and Service [Axis] us-gaap_GainsLossesOnSalesOfInvestmentRealEstate Gains (Losses) on Sales of Investment Real Estate us-gaap_IncreaseDecreaseInReceivableForInvestmentSold Increase (Decrease) in Receivable for Investment Sold Ownership [Axis] us-gaap_IncreaseDecreaseInPayableForInvestmentPurchased Increase (Decrease) in Payable for Investment Purchased Ownership [Domain] Change in unrealized investment gains (losses) us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss Increase in future policy benefits Increase in future policy benefits Reductions in mortgage loans due to foreclosure SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure Revision of Prior Period [Domain] Residential Mortgage-Backed Securities [Member] Revision of Prior Period [Axis] Dividend, endowment and supplementary life contract benefits Asset Class [Axis] Cumulative Effect, Period of Adoption, Adjustment [Member] Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Domain] Gain (Loss) on Securities [Table Text Block] Measurement Frequency [Axis] Statement [Line Items] Interest credited to policyholders Fair Value Hierarchy and NAV [Axis] Common Stock, Shares, Issued (in shares) Common Stock, Shares, Outstanding (in shares) Common Stock, Shares Authorized (in shares) Common Class B [Member] Common stock Accrued interest credited to policyholders' account balances Total benefits, claims and expenses Total benefits, claims and expenses Total expenses Total benefits, claims and expenses us-gaap_MortgageLoansInProcessOfForeclosureAmount Mortgage Loans in Process of Foreclosure, Amount Exchange-traded Debt Securities [Member] Represents information pertaining to exchange-traded debt securities. us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_TableTextBlock Notes Tables us-gaap_ProceedsFromIssuanceInitialPublicOffering Proceeds from Issuance Initial Public Offering Comprehensive Income (Loss) Note [Text Block] Total comprehensive income us-gaap_ComprehensiveIncomeNetOfTax Total comprehensive income Contingencies Disclosure [Text Block] us-gaap_ProceedsFromIssuanceOfPrivatePlacement Proceeds from Issuance of Private Placement us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumBeforeReinsuranceAfterDiscountRateChange Balance, end of year Balance, beginning of year us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumIssuance New issuances Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Concentration Risk [Table] Accounting Standards Update 2018-12 [Member] Payments on other long-term investments Related Party [Member] Significant Accounting Policies [Text Block] us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumNetPremiumCollected Net premium collected Maturities of fixed maturity securities Short-Term Investments [Member] us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumInterestIncome Interest accrual Trinity American, Inc. ("TAI") [Member] Represents Trinity American, Inc. ("TAI"). us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitBeforeReinsuranceAfterDiscountRateChange Balance, end of year Balance, beginning of year us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitIssuance New issuances us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience Effect of actual variances from expected ftfc_PercentOfDividends Percent of Dividends The percent of dividends received. K-TENN Insurance Company ("K-TENN") [Member] Represents K-TENN Insurance Company ("K-TENN"). us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange Trued-Up balance us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumCumulativeIncreaseDecreaseFromCashFlowChange Effect of changes in cash flow considerations ftfc_PolicyLiabilities Total policy liabilities Represents all policy liabilities as of the balance sheet date, including such items as liability for future policy benefits, unpaid claims and claims adjustment expense, and policyholder funds. us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience Effect of actual variances from expected Other policy liabilities Represents the amount of other policy liabilities as of the balance sheet date. ftfc_DividendsCommonStockStockPercent Dividends, Common Stock, Stock Percent Percent of paid and unpaid common stock dividends declared with the form of settlement in stock. Fair Value, Assets Measured on Recurring Basis [Table Text Block] us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitCumulativeIncreaseDecreaseFromCashFlowChange Effect of changes in cash flow considerations us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitDerecognition Withdrawal/surrenders us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitInterestExpense Interest accrual ftfc_IncreaseDecreaseInOtherPolicyLiabilities Other policy liabilities Represents the increase or decrease in other policy liabilities during the period. us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue Beginning balance Ending balance Current discount rate us-gaap_LiabilityForFuturePolicyBenefitCurrentWeightedAverageDiscountRate ftfc_PaymentsToAcquireMortageLoans Purchases of mortgage loans The cash outflow associated with the purchase of mortgage loans during the period. Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] ftfc_BenefitsAndClaims Total benefits and claims Total benefits and claims The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs. Current duration of the liability in years (Year) Payments on mortgage loans Joint venture distributions Benefits, undiscounted Gross premiums, undiscounted Long-Duration Insurance Contracts Disclosure [Text Block] us-gaap_PolicyholderAccountBalanceWithdrawal Withdrawals ftfc_IncreaseDecreaseInAssetsHeldInTrustUnderCoinsuranceAgreement Assets held in trust under coinsurance agreement The amount of increase (decrease) in assets held in trust under a coinsurance agreement. Funds withheld under coinsurance agreement The amount of funds that are withheld under certain coinsurance agreements. Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Domain] Policyholder Account Balance, at Guaranteed Minimum Crediting Rate [Member] Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Domain] Increase (decrease) Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Table Text Block] us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent Other comprehensive income (loss) before income tax expense (benefit) Statement of Stockholders' Equity [Abstract] Stock Conversion Description [Axis] Statement of Comprehensive Income [Abstract] Policyholders' account balances with guaranteed minimum crediting rates Policyholder Account Balance, above Guaranteed Minimum Crediting Rate Statement of Cash Flows [Abstract] Conversion of Stock, Name [Domain] Financing Receivable Portfolio Segment [Axis] Net cash used in investing activities Amount of noncash impact on investing activities. Total other comprehensive income us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent Total other comprehensive income (loss) Other comprehensive income (loss) Shareholders' equity Equity Components [Axis] us-gaap_PaymentsOfStockIssuanceCosts Payments of Stock Issuance Costs Financing Receivable Portfolio Segment [Domain] Equity Component [Domain] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] AOCI Attributable to Parent [Member] Fair Value, Inputs, Level 1 [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Corporate Debt Securities [Member] Debt Security, Government, Non-US [Member] us-gaap_GainOnSaleOfInvestments Gross realized gains on sale of investments us-gaap_LossOnSaleOfInvestments Gross realized losses on sale of investments Benefits and claims Adjustment to deferred acquisition costs ftfc_OtherComprehensiveIncomeLossAdjustmentToDeferredAcquisitionCosts Other comprehensive income loss adjustment to deferred acquisition costs. Family Benefit Life Insurance Company [Member] Family benefit life insurance company. Comprehensive Income (Loss) [Table Text Block] Assets held in trust under coinsurance agreement Premiun growth funds Amount of liability due to policyholder for premium growth funds. Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Less Than 0200 [Member] Range of guaranteed minimum crediting rate on policyholder account balance less than 2.00 percent. Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Allowance for mortgage loan losses Securities, amortized cost Debt Securities, Available-for-Sale, Amortized Cost Fixed maturity available-for-sale securities - amortized cost us-gaap_AssetsHeldInTrust Total assets held in trust under coinsurance agreement ftfc_NumberOfPrivatePlacements Number Of Private Placements Number of private placements. ftfc_NumberOfLoansPastDue Number Of Loans Past Due Number of loans past due. ftfc_PastDueLoansTermPastDue Past Due Loans, Term Past Due (Year) Past due loans term past due. Available-for-sale fixed maturity securities Accumulated other comprehensive income Unrealized appreciation or depreciation on available-for-sale securities. Future policy benefits related to discount rate Adjustment to deferred acquisition costs. Deferred income taxes Deferred income taxes. us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Allowance, beginning Allowance, ending us-gaap_LiabilityForFuturePolicyBenefits Future policy benefits Total future policy benefits Beginning balance Ending balance us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest Deferred federal income taxes Policyholder Account Balance [Table Text Block] Policyholder Account Balance, Guaranteed Minimum Crediting Rate Range [Axis] Fair Value Disclosures [Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] us-gaap_PolicyholderFunds Policyholders' account balances Total Policyholders' account balances' Balance Balance Net realized investment gains Net realized investment gains Net realized investment gains Current federal income tax expense ftfc_LossContingencyNumberOfLawsuits Loss Contingency, Number of Lawsuits Represents the number of lawsuits. Policyholder Account Balance, above Guaranteed Minimum Crediting Rate [Axis] us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments Accretion of discount on investments ftfc_PolicyTable Weighted Average Crediting Rate us-gaap_PaymentsToAcquireEquitySecuritiesFvNi Purchases of equity securities Proceeds from realized capital gains, equity securities us-gaap_MortgagesHeldForSaleFairValueDisclosure Mortgage loans on real estate TLIC [Member] TLIC. Co-op Loans [Member] Represents co-op loans. us-gaap_AccruedInvestmentIncomeReceivable Accrued investment income Accumulated other comprehensive income us-gaap_IncreaseDecreaseInFuturePolicyBenefitReservesAndOtherInsuranceLiabilities Future policy benefits us-gaap_AociLiabilityForFuturePolicyBenefitExpectedNetPremiumBeforeTax Effect of changes in discount rate Effect of changes in disount rate us-gaap_AociLiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitBeforeTax Effect of changes in discount rate Effect of changes in disount rate Other Commitments [Axis] Other Commitments [Domain] Additional paid-in capital Subsequent Events, Policy [Policy Text Block] Policyholders' account deposits Use of Estimates, Policy [Policy Text Block] Land Held for Investment [Member] Represents the land held for investment. Deferred Policy Acquisition Costs [Text Block] Unrealized Gain (Loss) on Investments [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Deferred Policy Acquisition Costs [Table Text Block] us-gaap_PaymentsToAcquireOtherInvestments Purchases of other long-term investments Mortgages [Member] us-gaap_StockIssuedDuringPeriodValueStockDividend Stock Issued During Period, Value, Stock Dividend us-gaap_DebtInstrumentFaceAmount Debt Instrument, Face Amount us-gaap_StockIssuedDuringPeriodSharesNewIssues Stock Issued During Period, Shares, New Issues (in shares) us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent Less amounts reclassified from accumulated other comprehensive loss having no credit losses, net of tax us-gaap_DebtInstrumentInterestRateStatedPercentage Debt Instrument, Interest Rate, Stated Percentage Other comprehensive income before reclassifications, net of tax Class of Stock [Domain] Related and Nonrelated Parties [Axis] Service fees and other income Amount of service fees and other income. us-gaap_TreasuryStockSharesAcquired Treasury Stock, Shares, Acquired (in shares) Fixed Maturities [Member] Real Estate Investment [Member] Investment real estate Real Estate Investments, Net Cash Flow, Supplemental Disclosures [Text Block] Common Stock Including Additional Paid in Capital [Member] Operating activities Debt Securities [Member] Investing activities us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash provided by operating activities Financing activities us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash used in investing activities us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash used in financing activities Stockholders' Equity, Policy [Policy Text Block] us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt Purchases of fixed maturity securities Sales of fixed maturity securities us-gaap_RealEstateInvestmentPropertyAtCost Investment real estate Realized Gain (Loss) on Investments [Table Text Block] Royalty Capital Life Insurance Company (RCLIC) [Member] Represents Royalty Capital Life Insurance Company (“RCLIC”). Operating Segments [Member] Accounting Policies [Abstract] Segments [Domain] Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member] US Treasury and Government [Member] Gross Investment income US States and Political Subdivisions Debt Securities [Member] Segments [Axis] Corporate Segment [Member] Income Statement [Abstract] Securities, fair value Available-for-sale fixed maturity securities at fair value Fixed maturity available-for-sale securities - fair value us-gaap_NumberOfReportableSegments Number of Reportable Segments Deferred federal income tax expense Deferred federal income tax expense Provision for deferred federal income tax expense (benefit) us-gaap_TreasuryStockCommonValue Treasury stock, at cost (298,516 shares as of June 30, 2026 and December 31, 2025) us-gaap_DeferredPolicyAcquisitionCostsPeriodIncreaseDecrease Increase (decrease) Treasury Stock, Common, Shares (in shares) Capitalized us-gaap_DeferredPolicyAcquisitionCostsAdditions Deferred Policy Acquisition Cost, Capitalization Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Amortization of deferred policy acquisition costs Amortization of deferred policy acquisition costs Amortization of policy acquisition cost Policy acquisition costs deferred net of amortization Treasury Stock, Common [Member] Redeemable Preferred Stock [Member] Deferred policy acquisition costs Deferred policy acquisition costs Deferred policy acquisition costs Net income Net income Net income Amortization of value of insurance business acquired Amortization of value of insurance business acquired Amortization of value of insurance business acquired Net investment income Common Class A [Member] us-gaap_AreaOfLand Area of Land (Acre) Accounting Standards Update [Domain] us-gaap_OtherCommitment Other Commitment Mortgage loans on real estate Mortgage loans on real estate, commercial and consumer, net Income Tax Disclosure [Text Block] Reinsurance Accounting Policy [Policy Text Block] Asset-Backed Securities [Member] Accounting Standards Update and Change in Accounting Principle [Table Text Block] us-gaap_LiabilityForFuturePolicyBenefitsPaymentForBenefits Benefit payments Recoverable from reinsurers us-gaap_AssetImpairmentCharges Loss on impairments Related and Nonrelated Parties [Domain] us-gaap_IncreaseDecreaseInReinsuranceRecoverable Recoverable from reinsurers us-gaap_TreasuryStockValueAcquiredCostMethod Treasury Stock, Value, Acquired, Cost Method us-gaap_PaymentsForProceedsFromLoansReceivable Net change in receivable and payable for securities sold and purchased ftfc_CashAndCashEquivalentNetOfOverdrafts Cash and cash equivalents Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Service fees Measurement Basis [Axis] Debt Securities, Available-for-Sale, Allowance for Credit Loss [Table Text Block] us-gaap_OtherAssetsFairValueDisclosure Other Assets, Fair Value Disclosure ftfc_NumberOfMortgageLoansInDefault Number of Mortgage Loans in Default Number of mortgage loans in default. Fair Value Hierarchy and NAV [Domain] us-gaap_TransferToInvestments Investment real estate held-for-sale acquired through foreclosure Measurement Frequency [Domain] us-gaap_OpenTaxYear Open Tax Year Statement of Financial Position [Abstract] us-gaap_IncreaseDecreaseInAccruedInvestmentIncomeReceivable Accrued investment income Value of insurance business acquired ftfc_ProceedsFromLegalSettlementsShares Proceeds from Legal Settlements, Shares The amount of shares received for the settlement of litigation during the current period. us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal Provision us-gaap_DividendsCommonStock Dividends, Common Stock ftfc_AmortizedCostOfDebtSecuritiesAvailableForSaleInAnUnrealizedLossPosition Amortized Cost of Debt Securities Available for Sale in an Unrealized Loss Position The amortized cost of debt securities available for sale in an unrealized loss position. New Investments [Member] Represents new investments. us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery Recoveries Other assets Mutual Fund [Member] us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff Charge offs Deferred policy liability ftfc_LiabilityForFuturePolicyBenefitDeferredProfitLiability Deferred profit liability Amount of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract classified as a deferred profit liability. Fair Value, Recurring [Member] us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease) Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Period Increase (Decrease) ftfc_AdvancesToLoanOriginator Advances To Loan Originator The amount of advances sent to a loan originator. us-gaap_IncreaseDecreaseInOtherOperatingAssets Other assets (excludes change in receivable for securities sold of $8,561 in 2025) One Loan Originator and Investments [Member] Refers to information regarding one loan originator and investments. ftfc_EscrowAmountAvailable Escrow Amount Available The amount of funds available in escrow for certain terms. dei_DocumentType Document Type Future policy benefits meetng ASU 2018-12 standards ftfc_LiabilityForFuturePolicyBenefitMeetingASU201812StandardsGross Gross amount of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract that meets ASU 2018-12 standards. Document Information [Line Items] Document Quarterly Report us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureBenefitOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange Trued-Up balance Participating life insurance contracts not on contribution basis ftfc_LiabilityForFuturePolicyBenefitParticipatingLifeInsuranceContractsNotOnContributionBasis Amount of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract related to participating life insurance contracts not on contribution basis. Gross premiums, current present value ftfc_LiabilityForFuturePolicyBenefitMeetingASU201812Standards Total future policy benefits meeting ASU 2018-12 standards Amount of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract that meets ASU 2018-12 standards. Document Information [Table] Future policy benefit reinsurance ceded ftfc_LiabilityForFuturePolicyBenefitReinsuranceCeded Amount of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract related to reinsurance ceded. Benefits, original present value Amount, before effect of reinsurance, of discounted (at original discount rate) balance for expected future policy benefit and expense component of liability for future policy benefit. dei_EntityInteractiveDataCurrent Entity Interactive Data Current us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Gross premiums, original present value Amount, before effect of reinsurance, of discounted balance (at original discount rate) for expected future gross premium component of liability for future policy benefit. Other ftfc_LiabilityForFuturePolicyBenefitOtherNotMeetingASU201812Standards Amount of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract classified as other which does not meet ASU 2018-12 standards. Document Transition Report Reduced paid up and extended term life insurance contracts ftfc_LiabilityForFuturePolicyBenefitReducedPaidUpAndExtendedTermLifeInsuranceContracts Amount of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract related to reduced paid up and extended term life insurance contracts. us-gaap_OperatingExpenses Total expenses Other underwriting, insurance and acquisition expenses Total expenses ftfc_LiabilityForFuturePolicyBenefitNotMeetingASU201812Standards Total future policy benefits not meeting ASU 2018-12 standards Amount of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract which does not meet ASU 2018-12 standards. Net income per common share FBLIC [Member] Represents information pertaining to the entity by the name of FBLIC. Original discount rate ftfc_LiabilityForFuturePolicyBenefitOriginalWeightedAverageDiscountRate Original weighted-average discount rate used to measure liability for future policy benefit. us-gaap_DepositAssets Deposit Assets Benefits, current present value Amount, before effect of reinsurance, of discounted balance for expected future policy benefit and expense component of liability for future policy benefit. Gain Loss On Sale Of Investments us-gaap_GainLossOnSaleOfInvestments Unrealized Gain Loss On Investments us-gaap_UnrealizedGainLossOnInvestments us-gaap_DebtInstrumentTerm Debt Instrument, Term Net income per common share (in dollars per share) us-gaap_EarningsPerShareBasic Net income per common share (in dollars per share) ftfc_MortgageLoansOnRealEstateCommercialAndConsumerNetAdditionalAmount Mortgage Loans on Real Estate, Commercial and Consumer, Net, Additional Amount The additional amount of mortgage loans on net commercial and consumer real estate. us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing Financing Receivable, Excluding Accrued Interest, 90 Days or More Past Due, Still Accruing Total deposit-type liabilites Related Parties [Member] Related to related parties. Deposits Amount deposited in the policyholders account. us-gaap_WithdrawalFromContractHoldersFunds Policyholders' account withdrawals Funds withheld under coinsurance agreement ftfc_PolicyholderAccountFindsWithheldUnderCoinsuranceAgreement The amount of funds that were withheld under the coinsurance agreement. Collaborative Arrangement and Arrangement Other than Collaborative [Table] Insurance Disclosure [Text Block] Original duration of the liability in years (Year) Original weighted-average duration of liability for future policy benefit, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Commissions ftfc_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsuranceExpectedRate Expected rate Amount, before effect of reinsurance and current period update of cash flow assumption, of expected future policy benefit and expense component of liability for future policy benefit, discounted at original rate. ftfc_LiabilityForFuturePolicyBenefitBeforeReinsuranceActualRate Actual rate Amount, before effect of reinsurance, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract. Amount Inforce [Member] Amount Inforce Residential Mortgage [Member] Annuity Amount due to policyholder. Includes, but is not limited to, unpaid policy dividend, retrospective refund, and undistributed earnings on participating business. Excludes future policy benefit and claim expense. Lapsation [Member] Lapsation Mortality [Member] Mortality Document Fiscal Period Focus Document Fiscal Year Focus ftfc_LiabilityForFuturePolicyBenefitActualToExpectedLiability Actual to expected ratio The ratio of actual to expected future policy benefit liability. Amendment Flag Supplemental contracts with out life contingencies Common Stock [Member] ftfc_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsuranceExpected Expected Amount, before effect of reinsurance and current period update of cash flow assumption, of expected future policy benefit and expense component of liability for future policy benefit, discounted at original rate. ftfc_LiabilityForFuturePolicyBenefitBeforeReinsuranceActual Actual Amount, before effect of reinsurance, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract. Other liabilities (excludes change in payable for securities purchased of $10,088 in 2025) ftfc_PolicyholderBenefitsAndClaimsIncurredNetDeathBenefits Increase in future policy benefits Amount, after effect of policies assumed or ceded, of expense related to provision for policy benefits and costs incurred for life and annuity insurance contracts. Policy liabilities dei_DocumentPeriodEndDate Document Period End Date Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater [Member] Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0200 to 0299 [Member] Legal Entity [Axis] Residential Portfolio Segment [Member] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 [Member] Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 [Member] Commercial Portfolio Segment [Member] Business Combination [Domain] us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment Financing receivable, Individually evaluated for reserve allowance dei_EntityFileNumber Entity File Number us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax Net unrealized gains (losses) Net unrealized losses on investments, before tax us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment Financing Receivable, Collectively Evaluated for Impairment Entity Tax Identification Number Business Combination [Axis] us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment Collectively evaluated for impairment Securities in an unrealized loss position, less than twelve months, unrealized loss us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss Entity [Domain] Securities in an unrealized loss position, more than twelve months, unrealized loss us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss Entity Central Index Key us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired Business Combination, Voting Equity Interest Acquired, Percentage SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Domain] Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 [Member] dei_EntityRegistrantName Entity Registrant Name Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater [Member] Business Combination [Policy Text Block] dei_EntityCurrentReportingStatus Entity Current Reporting Status Entity Incorporation, State or Country Code Policyholders' account balances ceded The amount of customer funds, account values, or policy reserves (common in universal life or annuity products) that an insurance company transfers (cedes) to a reinsurer. Current Fiscal Year End Date Change in unrealized investment gains (losses) us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax Net unrealized losses on investments, net of tax us-gaap_OtherComprehensiveIncomeLossBeforeTax Total other comprehensive income, before tax ftfc_PolicyholderFundsTotalAdditions Total additions Total addition to the amount due to policyholder. ftfc_WhollyOwnedSubsidiaryOwnershipPercentage Wholly Owned Subsidiary Ownership Percentage Percentage of voting equity interests owned in a subsidiary. Federal income tax expense (benefit) Income tax expense (benefit) Entity Filer Category ftfc_TermProductsNumberOfYears Term Products Number of Years (Year) (Year) The term of life insurance products. dei_EntityShellCompany Entity Shell Company Trinity Life Insurance Company [Member] The entity Trinity Life Insurance Company (TLIC). us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax Net unrealized losses on investments, tax Entity Emerging Growth Company Term Products 15 Year [Member] Insurance products that are renewable and convertible and issued for 15 years. us-gaap_OtherComprehensiveIncomeLossNetOfTax Total other comprehensive loss, net of tax Entity Small Business Term Products 10 Year [Member] Insurance products that are renewable and convertible and issued for 10 years. Term Products 20 Year [Member] Insurance products that are renewable and convertible and issued for 20 years. us-gaap_CommonStockDividendsShares Common Stock Dividends, Shares (in shares) Retail Site [Member] Investments [Domain] Term Products 30 Year [Member] Insurance products that are renewable and convertible and issued for 30 years. us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less) ftfc_NumberOfPublicOfferings Number of Public Offerings Number of public offerings offered by the entity. First Trinity Capital Corporation [Member] The entity First Trinity Capital Corporation (FTCC). ftfc_NumberOfStockDividends Number of Stock Dividends The number of stock dividends that were paid by the entity. First Life America Corporation [Member The entity First Life America Corporation (FLAC). First Trinity Financial Corporation [Member] The entity First Trinity Financial Corporation (FTFC). Other underwriting, insurance and acquisition expenses us-gaap_SegmentReportingOtherItemAmount Total revenue us-gaap_Revenues Total revenues Total revenue Revenues us-gaap_BusinessCombinationConsiderationTransferred1 Business Combination, Consideration Transferred dei_EntityAddressStateOrProvince Entity Address, State or Province ftfc_AssetAcquiredUnderAssumptionReinsuranceAgreement Asset Acquired Under Assumption Reinsurance Agreement The amount of asset acquired under assumption reinsurance agreement. dei_EntityAddressCityOrTown Entity Address, City or Town ftfc_NumberOfSubsidiariesMerged Number of Subsidiaries Merged Number of separate subsidiaries merged into one consolidated subsidiary. ftfc_GainOnReinsuranceAssumption Gain on Reinsurance Assumption Investing and finance activities associated with estimated gain on the reinsurance assumption transactions. Accumulated earnings ftfc_LiabilitiesAssumedUnderReinsuranceAssumptionAgreement Liabilities Assumed Under Reinsurance Assumption Agreement Represents the amount of liabilities assumed under the reinsurance assumption agreement. dei_EntityAddressAddressLine1 Entity Address, Address Line One SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Loan Category [Axis] dei_CityAreaCode City Area Code us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost Due after one year through five years - amortized cost Common Stock Policy [Policy Text Block] Disclosure of accounting policy for common stock. us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost Due after five years through ten years - amortized cost dei_LocalPhoneNumber Local Phone Number Premiums us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost Due in one year or less - amortized cost dei_EntityAddressPostalZipCode Entity Address, Postal Zip Code ftfc_FairValueToCostRatio Fair Value to Cost Ratio The ratio of the fair value to the amortized cost of securities in an unrealized loss position.. us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue Due at multiple maturity dates - fair value Liability for Future Policy Benefit, Activity [Table Text Block] us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue Due after five years through ten years - fair value us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsurance Ending balance at original discount rate Beginning balance at original discount rate us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue Due after ten years - fair value us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeCashFlowAndReinsurance Ending balance at original discount rate Beginning balance at original discount rate us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue Due in one year or less - fair value us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue Due after one year through five years - fair value us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost Due after ten years - amortized cost Class of Stock [Axis] us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost Due at multiple maturity dates - amortized cost Lottery Prize Cash Flows [Member] The lottery prize cash flows are assignments of the future rights from lottery winners purchased at a discounted price. us-gaap_OtherComprehensiveIncomeLossTax Total other comprehensive loss, tax us-gaap_LiabilityForFuturePolicyBenefitReinsuranceRecoverableAfterAllowance Reinsurance recoverable Reinsurance recoverable dei_EntityCommonStockSharesOutstanding Entity Common Stock, Shares Outstanding (in shares) us-gaap_LiabilityForFuturePolicyBenefitAfterReinsurance Net liability for future policy benefits Subtotal Other comprehensive income (loss) Topeka Kansas [Member] The city of Topeka, Kansas. Assets Held-for-sale not Part of a Disposal Group [Member] Long-lived assets that meet the criteria for "held for sale" assets. Jefferson City Missouri [Member] The city of Jefferson City, Missouri. us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax Unrealized holding losses arising during the period, tax Total net unrealized gains (losses) arising during the period Unrealized holding losses arising during the period, before tax us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax Unrealized holding losses arising during the period, net of tax us-gaap_OciLiabilityForFuturePolicyBenefitGainLossAfterReclassificationAdjustmentAndTax Remeasurement loss on future policy benefits related to discount rate, net of tax Internal Credit Assessment [Axis] us-gaap_BusinessCombinationAcquisitionRelatedCosts Business Combination, Acquisition Related Costs Remeasurement gains on future policy benefit related to discount rate Remeasurement gains (losses) on future policy benefits related to discount rate Remeasurement loss on future policy benefits related to discount rate, before tax us-gaap_PaymentsForProceedsFromPolicyLoans Policy loans us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements Joint venture distribution Scenario [Axis] Scenario [Domain] ftfc_RightToReceiveDividendPercentage Right To Receive Dividend Percentage Represents right to receive dividends percentage. us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues Joint venture net income Receivables Excluding Policy Loan Receivables [Member] Receivables Excluding Policy Loan Receivables Underdeveloped Land [Member] Represents underdeveloped land. Joint venture investment Real Estate [Domain] Loan to Value Range1 [Member] Range one in a set of loan to value ranges. Loan to value is the ratio of the carrying value of individual loans compared to the individual appraisal value. Loan to Value Range 3 [Member] Range three in a set of loan to value ranges. Loan to value is the ratio of the carrying value of individual loans compared to the individual appraisal value. Real Estate, Type of Property [Axis] Loan to Value Range 2 [Member] Range two in a set of loan to value ranges. Loan to value is the ratio of the carrying value of individual loans compared to the individual appraisal value. Investments Classified by Contractual Maturity Date [Table Text Block] us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments Proceeds from sale, maturity, or collection of investments Loan to Value Range 5 [Member] Range five in a set of loan to value ranges. Loan to value is the ratio of the carrying value of individual loans compared to the individual appraisal value. Loan to Value Range 4 [Member] Range four in a set of loan to value ranges. Loan to value is the ratio of the carrying value of individual loans compared to the individual appraisal value. Internal Credit Assessment [Domain] Loan to Value Range 7 [Member] Range seven in a set of loan to value ranges. Loan to value is the ratio of the carrying value of individual loans compared to the individual appraisal value. Loan to Value Range 6 [Member] Range six in a set of loan to value ranges. Loan to value is the ratio of the carrying value of individual loans compared to the individual appraisal value. Other long-term investments Long-term Investments Common Stock, Par or Stated Value Per Share (in dollars per share) Common Stock, Par or Stated Value Per Share (in dollars per share) Loan to Value Range 8 [Member] Range eight in a set of loan to value ranges. Loan to value is the ratio of the carrying value of individual loans compared to the individual appraisal value. Premium Finance Loans [Member] Loans classified under premium finance. us-gaap_OtherLiabilities Other liabilities us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 Individually evaluated for impairment Basis of Accounting, Policy [Policy Text Block] Accounting Standards Update [Axis] Previously Reported [Member] Other Long-Term Investments [Member] Receivable [Domain] us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax Reclassification adjustment for net gains included in operation having no credit losses, tax Less net realized investment gains having no credit losses Reclassification adjustment for net gains included in operation having no credit losses, before tax Total assets us-gaap_Assets Total assets us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax Reclassification adjustment for net gains included in operation having no credit losses, net of tax Cash and cash equivalents Geographical [Domain] Geographical [Axis] Independent Mortgage Loan Balances [Member] Item represents independent mortgage loan balances that are held by a third party as collateral. Premium and other deposit funds Commercial [Member] Loans classified as commercial. ftfc_OtherLongTermInvestmentsFairValue Other long-term investments Fair value disclosure of other long-term investments. Residential [Member] Loans classified as residential. ftfc_FinancialAssetsFairValue Total financial assets Fair value disclosure of financial assets. ftfc_FinancialLiabilitiesFairValue Total financial liabilities Fair value disclosure of financial liabilities. ftfc_PolicyholderFundsFairValue Policyholders' account balances Fair value disclosure of policyholder funds. Depreciation and amortization expense us-gaap_DepreciationDepletionAndAmortization Adjustment to Deferred Acquisition Costs [Member] Represents adjustments to deferred acquisition costs. Annuity Operations [Member] Business segment classified as annuity operations. Life Insurance Operations [Member] Business segment classified as life insurance operations. Asset Class [Domain] us-gaap_OciLiabilityForFuturePolicyBenefitGainLossAfterReclassificationAdjustmentTax Remeasurement loss on future policy benefits related to discount rate, tac Cash surrender value Investment Type [Axis] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Consolidation, Policy [Policy Text Block] Surrenders Surrenders Amount, after effect of policies assumed or ceded, of expense related to provision for benefits and costs incurred for surrenders. Death benefits Death benefits Amount, after effect of policies assumed or ceded, of expense related to provision for policy benefits and costs incurred for life and annuity insurance contracts. Receivable Type [Axis] Investment Income [Table Text Block] Cybersecurity [Policy Text Block] Disclosure of accounting policy for cybersecurity. Real Estate Properties [Domain] Real Estate Property Ownership [Axis] Deposit Liabilities, Type [Table Text Block] us-gaap_StockholdersEquity Total shareholders' equity Balance Balance Dividend accumulations ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag]