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Disclosure - Loans and Allowance for Credit Losses - Summary of Aging of Loans (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 995997 - Disclosure - Loans and Allowance for Credit Losses - Schedule of Loan Delinquency for Recreation and Home Improvement Loans (Detail) link:presentationLink link:calculationLink link:definitionLink 996007 - Disclosure - Loans and Allowance for Credit Losses - Schedule of Loan Delinquency for Recreation and Home Improvement Loans (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 996017 - Disclosure - Funds Borrowed - Schedule of Outstanding Balances of Funds Borrowed (Detail) link:presentationLink link:calculationLink link:definitionLink 996027 - Disclosure - Funds Borrowed - Schedule of Outstanding Balances of Funds Borrowed (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 996037 - Disclosure - Funds Borrowed - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996047 - 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Disclosure - Income Taxes - Summary of Reconciliation of Statutory Federal Income Tax Provision to Consolidated Actual Income Tax Provision (Detail) 2 link:presentationLink link:calculationLink link:definitionLink 996177 - Disclosure - Income Taxes - Summary of Reconciliation of Statutory Federal Income Tax Provision to Consolidated Actual Income Tax Provision (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 996187 - Disclosure - Income Taxes - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996197 - Disclosure - Stock Options and Restricted Stock - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996207 - Disclosure - Stock Options and Restricted Stock - Summary of Activity for Performance Stock Units and Restricted Stock Programs (Detail) link:presentationLink link:calculationLink link:definitionLink 996217 - Disclosure - Stock Options and Restricted Stock - 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Fair Value of Assets and Liabilities - Summary of Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Detail) link:presentationLink link:calculationLink link:definitionLink 996407 - Disclosure - Fair Value of Assets and Liabilities - Summary of Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 996417 - Disclosure - Fair Value of Assets and Liabilities - Summary of Valuation Techniques and Significant Unobservable Inputs Used in Non-Recurring Level 3 Fair Value Measurements of Assets and Liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 996427 - Disclosure - Medallion Bank Preferred Stock (Non-controlling Interest) - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996437 - Disclosure - Parent Company Only Condensed Financial Statements - Condensed Balance Sheets (Detail) link:presentationLink link:calculationLink link:definitionLink 996447 - Disclosure - Parent Company Only Condensed Financial Statements - Condensed Balance Sheets (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 996457 - Disclosure - Parent Company Only Condensed Financial Statements - Condensed Statements of Operations (Detail) link:presentationLink link:calculationLink link:definitionLink 996467 - Disclosure - Parent Company Only Condensed Financial Statements - Condensed Statements of Operations (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 996477 - Disclosure - Parent Company Only Condensed Financial Statements - Condensed Statements of Other Comprehensive Income (Detail) link:presentationLink link:calculationLink link:definitionLink 996487 - Disclosure - Parent Company Only Condensed Financial Statements - Condensed Statements of Cash Flow (Detail) link:presentationLink link:calculationLink link:definitionLink 996497 - Disclosure - Variable Interest Entities - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 996507 - Disclosure - Subsequent Events - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink Shares were rolled into the 2018 Plan Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Rolled Out From Old Plan To New Plan Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Rolled Out From Old Plan To New Plan Payments for Repurchase of Redeemable Noncontrolling Interest Non-controlling interest redemption at Medallion Bank Non-controlling interest redemption at Medallion Bank March Two Thousand And Ninteen Notes [Member] March two thousand and ninteen notes. March 2019 [Member] Change in Accounting Principle, Type Change in Accounting Principle, Type [Domain] Weighted average grant price, vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value September 2014 [Member] September Two Thousand And Fourteen Notes [Member] September two thousand and fourteen notes. Reserve coverage Reserve Coverage Ratio Reserve Coverage Ratio Increase (Decrease) in Interest Payable, Net Decrease (increase) in accrued interest payable Building Improvements [Member] Home Improvement [Member] Segments Segments [Domain] 90+ [Member] Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Number of shares outstanding, performance stock units Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Beginning Balance Concentration Risk Type Concentration Risk Type [Axis] Financing Receivable, Allowance for Credit Loss, Writeoff Financing Receivable, Allowance for Credit Loss, Writeoff, Total Charge-offs Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year 2023 Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Preferred Stock, Shares Issued, Total US Treasury shares purchased Preferred Stock, Shares Issued Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery, Total Net charge-offs March 2014 [Member] March Two Thousand And Fourteen Notes [Member] March two thousand and fourteen notes. Senior Vice President [Member] Vice President [Member] NON-CASH INVESTING Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Measurement Input Median Transfer Price [Member] Measurement Input Median Transfer Price [Member] Measurement input median transfer price. Fair Value, due in one year or less Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Average Price Paid per Share Shares Acquired, Average Cost Per Share Interest yield Interest Yield Interest yield. Plan Name Plan Name [Axis] Medallion Financing Trust I [Member] Medallion Financing Trust I [Member] Medallion Financing TrustI. Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Fair Value, Twelve Months and Over Equity [Abstract] Number of individual with time deposits greater than $100,000 Number Of Individual With Time Deposits Greater Than100000 Number of individual with time deposits greater than100000. Entity Current Reporting Status Entity Current Reporting Status Other Commitment Other Commitment, Total Other commitment Class of Financing Receivable Class of Financing Receivable [Axis] Debenture last issuance date Note Dates Debt Instrument, Issuance Date UTAH Utah [Member] Recreation [Member] Recreation [Member] Recreation. Preferred stock, net of liquidation amount Preferred Stock Stock Issuance Costs Preferred stock , stock issuance costs. Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Common stock, shares authorized Common Stock, Shares Authorized Rent expense Lease And Rental Expense1 Lease And Rental Expense1 Gain on Sale of Recreation Loans Held for Sale Gain on sale of recreation loans held for sale. Gain on sale of recreation loans held for sale Investment Securities Investment, Policy [Policy Text Block] March 2025 [Member] March Two Thousand and Twenty Five Notes [Member] March two thousand and twenty five notes. Product and Service Product and Service [Axis] Agency Securities [Member] Agency Bonds [Member] Loans Insured or Guaranteed by Government Authorities Loans Insured or Guaranteed by Government Authorities [Axis] Grant price per share, vested, lower limit Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Grant Price Per Share Range Lower Range Limit Share based compensation arrangement by share based payment award equity instruments other than options vested in period grant price per share range lower range limit. Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs [Member] Total number of shares purchased as part of publicly announced plans or programs. Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs Document Fiscal Period Focus Document Fiscal Period Focus Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Exercise price per share, Cancelled, Lower limit Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Options Forfeited Exercise Price Per Share Lower Range Limit Share based compensation arrangement by share based payment award options nonvested options forfeited exercise price per share lower range limit. Debt Instrument, Interest Rate, Stated Percentage Debt instrument interest rate Percentage Interest Rate Entity Shell Company Entity Shell Company Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff 2022 Cash and Cash Equivalents, at Carrying Value, Ending Balance Cash and Cash Equivalents, at Carrying Value, Beginning Balance Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Cash and Cash Equivalent Measurement Input Transfer Prices [Member] Measurement Input Transfer Prices [Member] Measurement input transfer prices. Schedule of Activity of Gross Loans Schedule Of Gross Real Estate And Loan Activity Table [Text Block] Schedule Of Gross Real Estate And Loan Activity Table [Text Block] Equity investments measured on a non-recurring basis Fair Value Liabilities Measured On Non Recurring Basis Obligations Fair value liabilities measured on non recurring basis obligations. Condensed Financial Information Disclosure [Abstract] Non marketable securities. Non-marketable securities Non Marketable Securities February 1 To February 29 [Member] February 1 To February 29. February 1 To February 29 [Member] Cybersecurity Risk Management, Strategy, and Governance [Abstract] Common Stock, Shares, Issued, Total Issue of common stock Common stock, shares issued Common Stock, Shares, Issued Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] Texas [Member] TEXAS Cybersecurity Risk Board of Directors Oversight [Text Block] Asset Class [Domain] Grant price per share, vested, upper limit Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Grant Price Per Share Range Upper Range Limit Share based compensation arrangement by share based payment award equity instruments other than options vested in period grant price per share range upper range limit. Pledged Securities Advance Rate of Book Value Pledged securities advance rate of book value. Pledged Securities Advance Rate of Book Value Statement [Table] Statement [Table] Change in effective state income tax rates and accrual Change in effective state income tax rates and accrual Effective Income Tax Rate Reconciliation, Tax Contingency, State and Local, Amount Debt instrument commitments drawn Line Of Credit Facility Drawn Amount Line Of Credit Facility Drawn Amount Line of credit facility, drawn amount. Accrued interest receivable Interest Receivable Income Approach [Member] Valuation, Income Approach [Member] 2018 Restricted Stock Plan [Member] Two Thousand Eighteen Unvested Restricted Stock Plan [Member] Two Thousand Eighteen Restricted Stock Plan [Member] Weighted average exercise price, granted Weighted average fair value of options granted Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value 2021 Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year Statement [Line Items] Statement [Line Items] Weighted average exercise price, cancelled Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Banking Regulation, Tier 1 Risk-Based Capital, Actual Tier 1 capital Entity Filer Category Entity Filer Category Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Variable Interest Entities Variable Interest Entity Disclosure [Text Block] 60-89 [Member] Financial Asset, 60 to 89 Days Past Due [Member] Schedule Of Financing Receivables Past Due [Table] Financing Receivable, Past Due [Table] Paid on or Before February 1, 2019 [Member] Debt Instrument, Redemption, Period Two [Member] Total liabilities and equity Liabilities and Equity Debt Instrument [Line Items] Debt Instrument [Line Items] Grant price per share, granted, upper limit Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Grant Price Per Share Range Upper Range Limit Share based compensation arrangement by share based payment award equity instruments other than options grants in period grant price per share range upper range limit. Financing Receivable, Allowance for Credit Loss, Recovery Recoveries Noninterest Income Other income (loss) Total other income, net Long-Term Debt, Maturity, Year Three 2028 Weighted average exercise price, options exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Long-Lived Tangible Asset [Axis] Debt instrument, frequency of periodic payment Debt Instrument, Frequency of Periodic Payment Interest Payable June Two Thousand And Twenty One Notes [Member] June two thousand and twenty one notes. June 2021 [Member] Summary of Carrying Amounts and Fair Values of Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Exercise price per share, cancelled Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Exercise Price Share based compensation arrangements by share based payment award options expirations in period exercise price. Vest on June 22, 2024 [Member] Vesting on June Twenty Two Two Thousand And Twenty Four [Member] Vesting on june twenty two two thousand and twenty four. Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] Fair Value of Financial Instruments Financial Instruments Disclosure [Text Block] Tier 1 leverage capital Banking Regulation, Tier 1 Leverage Capital, Actual Accrued interest receivable Interest Receivable Fair Value Interest receivable fair value. Grant price per share, granted, lower limit Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Grant Price Per Share Range Lower Range Limit Share based compensation arrangement by share based payment award equity instruments other than options grants in period grant price per share range lower range limit. Distributions to non-controlling interests Distributions To Noncontrolling Interests Distributions to noncontrolling interests. 30-59 [Member] Financial Asset, 30 to 59 Days Past Due [Member] Valuation allowance Deferred Tax Assets, Valuation Allowance, Total Valuation allowance Deferred Tax Assets, Valuation Allowance Statutory Federal income tax provision percentage Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Subsequent Event [Line Items] Non deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount, Total Non deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process Total Cybersecurity Risk Management Third Party Engaged [Flag] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Goodwill Goodwill Effective Income Tax Rate Reconciliation, Percent Total income tax provision Issuance in connection with vesting of restricted stock units Stock Issued During Period, Shares, Restricted Stock Award, Vested Stock issued during period, shares, restricted stock award, vested. Percentage of return on average stockholders equity. Percentage of Return on Average Stockholders Equity Return on average stockholders' equity Collection costs. Collection Costs Collection costs Treasury Stock, Common, Value Payment for repurchase of common stock Total Amount Paid Income Tax Jurisdiction [Axis] Number Of Medallions Number of medallions. Number of medallions purchased out of foreclosure Amortization of origination fees, net Amortization of Deferred Loan Origination Fees, Net Amortization of origination fees and costs, net Geographical Geographical [Domain] Amortized Cost, due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Percentage of Nonperforming to Total Loans And Leases Receivable Non Performing Percentage Loans and leases receivable non performing percentage. Schedule Of Variable Interest Entities [Table] Variable Interest Entity [Table] Debenture Mature2021 Debenture Mature2021 [Member] Debenture mature 2021. Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Additional paid in capital Additional Paid in Capital, Common Stock Debt Issuance Costs, Net, Total Deferred financing costs Debt Issuance Costs, Net Annual interest rate Debt Instrument, Interest Rate During Period Proceeds from Sale and Maturity of Held-to-maturity Securities, Total Proceeds from Sale and Maturity of Held-to-Maturity Securities Proceeds from principal receipts, sales, and maturities of loans and investments Proceeds from principal receipts, sales, maturities, and recoveries of loans Exercise price per share, option exercisable lower range limit Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Exercise Price Range Lower Range Limit Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Exercise Price Range Lower Range Limit Investment, Variable Interest Rate, Type [Extensible Enumeration] Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Non - Performing [Member] Nonperforming Financial Instruments [Member] Share Repurchase Program Share Repurchase Program [Axis] Number of securities. Number of Securities Number of Securities Vesting Vesting [Domain] Risk-weighted assets Banking Regulation, Risk-Weighted Assets, Actual Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Granted Number of options, granted Schedule of Intangible Assets Schedule Of Intangible Assets Table [Text Block] Schedule Of Intangible Assets [Table Text Block] Cybersecurity Risk Management, Strategy, and Governance [Table] Summary of the Calculation of Basic and Diluted EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Series E Senior Non-Cumulative Perpetual Preferred Stock [Member] Series E Senior Noncumulative Perpetual Preferred Stock [Member] Series E senior non-cumulative perpetual preferred stock. Loan originations Proceeds from Loan Originations Equity Securities [Member] Equity Securities [Member] Comprehensive Income Net Of Tax Including Portion Attributable To Non controlling Interests Comprehensive Income Net Of Tax Including Portion Attributable To Non controlling Interests Total comprehensive income Financial Condition and Operating Performance Enterprise Value [Member] Financial Condition And Operating Performance Enterprise Value [Member] Financial condition and operating performance enterprise value. Aggregate purchase price Proceeds from Issuance of Preferred Stock and Preference Stock Summary of Amortized Cost and Estimated Market Value of Investment Securities by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Basic income per share Earnings Per Share, Basic, Total Earnings Per Share, Basic Basic earnings per share Schedule of Repurchase Agreements [Table Text Block] Schedule of Repurchase Agreements Capital conversation buffer Tier One Capital Conversation Buffer Tier one capital conversation buffer. Stock option outstanding Number of options beginning balance Number of options ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Notes Payable to Banks with Maturity of September 1, 2021 [Member] Notes Payable To Banks With Maturity Of September One Two Thousand And Twenty One [Member] Notes payable to banks with maturity of September 1, 2021. Weighted average exercise price, vested Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Annual base salary Salary and Wage, Officer, Excluding Cost of Good and Service Sold Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] Dividend description of variable rate basis Dividend Description Of Variable Rate Basis Dividend description of variable rate basis. Adjustments to reconcile net loss to net cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net income resulting from operations to net cash provided by operating activities: Lessee, Operating Lease, Liability, to be Paid, Year Five 2030 Salary and Wage, Excluding Cost of Good and Service Sold, Total Salary from related party Salary and Wage, Excluding Cost of Good and Service Sold Trust Preferred Securities [Member] Trust Preferred Securities [Member] Trust preferred securities. Schedule Of Gross Real Estate And Loan Activity [Table] Schedule Of Gross Real Estate And Loan Activity [Table] Schedule Of Gross Real Estate And Loan Activity [Table] Subsegments Subsegments [Axis] Share Repurchase Program Share Repurchase Program [Domain] Financing Receivable, Allowance for Credit Losses [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] Parent Company [Member] Medallion Financial Corp [Member] Parent Company [Member] Equity Method Offering Price [Member] Equity Method Offering Price [Member] Equity method offering price. Purchase Commitment, Excluding Long-Term Commitment [Line Items] Accounting Standards Update [Axis] Consolidation Items Consolidation Items [Domain] Equity, Attributable to Parent [Abstract] Entity Small Business Entity Small Business Federal Home Loan Banks [Abstract] Loans Held for Investment [Member] Loans held for investment. 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Vest on June 12, 2026 [Member] Noninterest Income [Abstract] Other income Parent [Member] Parent [Member] Document Financial Statement Error Correction [Flag] Exercise of stock options,shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Exercised Unvested shares of common stock outstanding Number of options beginning balance Number of options ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares Student Loan Portfolio By Program [Line Items] Student Loan Portfolio By Program [Line Items] Student loan portfolio by program. Debt Disclosure [Abstract] Condensed Cash Flow Statements Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Investment Securities Investment [Text Block] Schedule of Private Placement Notes [Table Text Block] Schedule of private placement notes. Schedule of Private Placement Notes Proceeds from Sale, Loan, Held-for-Sale Proceeds from Sale, Loan, Held-for-Sale, Total Proceeds from sales of strategic partnership loans held for sale Repayments of time deposits and funds borrowed Repayments of note payable Repayments of Related Party Debt Repayments of funds borrowed Unvested Performance Shares [Member] Unvested performance shares. Marketable Securities, Total Investment securities Marketable Securities Net income attributable to common stockholders Net Increase Decrease In Net Assets Resulting From Operations Net increase decrease in net assets resulting from operations. Financial Instrument Performance Status Financial Instrument Performance Status [Domain] Series F Preferred Stock [Member] Series F Preferred Stock [Member] Current Fiscal Year End Date Current Fiscal Year End Date Debt Instrument [Table] Schedule of Long-Term Debt Instruments [Table] equity in undistributed earnings losses of subsidiaries equity in undistributed earnings losses of subsidiaries Equity in undistributed (earnings) losses of subsidiaries Equity in undistributed earnings of subsidiaries Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] December Two Thousand And Twenty Notes [Member] December two thousand and twenty notes. December 2020 [Member] Collateral Value [Member] Measurement Input Collateral Value [Member] Measurement input collateral value. Third Party Investors [Member] Third Party Investors [Member] Third party investors. Stock Repurchase Program [Member] Stock Repurchase Program [Member] Stock Repurchase Program [Member] California [Member] CALIFORNIA Receivables [Abstract] Federal Reserve and Other Borrowings [Member] Federal Reserve and Other Borrowings [Member] Federal reserve and other borrowings. Fair Value By Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Entity Address, State or Province Entity Address, State or Province Investment in subsidiaries Investment in subsidiaries Payments to Acquire Interest in Subsidiaries and Affiliates Payments to Acquire Interest in Subsidiaries and Affiliates, Total Number of shares outstanding Number of shares, beginning balance Number of shares, ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Schedule Of Current Period Gross Charge-Offs Table [Text Block] Schedule of current period gross charge offs. 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March 2019 [Member] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Number of additional shares available for issuance Common Stock, Capital Shares Reserved for Future Issuance Incremental Common Shares Attributable to Share-based Payment Arrangements, Total Effect of dilutive stock options Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Geographical Geographical [Axis] Transfer of Loans from to Held for Sale Value of loans held, transfer of loans (from) to held for sale. Transfer of loans (from) to loans held for sale Preferred Stock Redemption Premium Less: redemption of of Series F preferred stock - funds paid in excess of carrying value Proceeds from Sale and Collection of Receivables, Total Proceeds from principal receipts, sales, and maturities of investments Proceeds from Sale and Collection of Receivables Non-controlling interest Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity Attributable to Noncontrolling Interest, Total Non-controlling interest in consolidated subsidiaries Equity, Attributable to Noncontrolling Interest Taxi Medallion Loan Trust III [Member] Taxi Medallion Loan Trust I I I [Member] Taxi Medallion Loan Trust III. Exercise price per share, granted Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Exercise Price Share based compensation arrangements by share based payment award options grants in period exercise price. State and local income taxes, net of federal income tax benefit State and local income taxes, net of federal income tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Fair Value Adjustments Related To Loans Held For Sale Fair value adjustments related to loans held for sale. Fair value adjustments related to loans held for sale Exercise of stock options,value Stock Issued During Period, Value, Stock Options Exercised March Two Thousand And Sixteen Notes [Member] March two thousand and sisteen notes. March 2016 [Member] Series F Fixed-to-Floating Rate Non-cumulative Perpetual Preferred Stock [Member] Series F Fixed To Floating Rate Noncumulative Perpetual Preferred Stock [Member] Series F fixed to floating rate non-cumulative perpetual preferred stock. Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of Components of Deferred Tax Assets and Liabilities PSU [Member] Performance Shares [Member] Performance Shares [Member] Exercise price per share, option exercisable upper range limit Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Exercise Price Range Upper Range Limit Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Exercise Price Range Upper Range Limit Subsequent Event [Member] Subsequent Event [Member] R P A C Racing L L C [Member] RPAC RPAC [Member] Interest Expense, Operating Total interest expense Total interest expense Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Interest Income (Expense), after Provision for Loan Loss Net interest income after allowance for credit losses Net operating loss carryforwards expiration period Net Operating Loss Carryforwards Expiration Period Description Net operating loss carryforwards expiration period description. Medallion Capital, Inc. [Member] Medallion Capital, Inc. [Member] Medallion capital, inc. Remaining portion of leverage fee amount Debt Instrument, Unused Borrowing Capacity, Fee Subsidiary or Equity Method Investee [Line Items] Subsidiary or Equity Method Investee [Line Items] Exercise price per share beginning balance, Lower limit Exercise price per share ending balance, Lower limit Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Options Exercise Price Per Share Range Lower Range Limit Share Based Compensation Arrangement By Share Based Payment Award Options Nonvested Options Exercise Price Per Share Range Lower Range Limit Cancelled Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period Award vesting rights, percentage Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Brokerage [Member] Brokerage [Member] Brokerage [Member] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Aggregate intrinsic value of option vested Interest Expense, Debt, Total Interest expense Interest Expense, Debt Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract] Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual Common equity tier 1 capital ratio Change in effective state income tax rates and accrual Effective Income Tax Rate Reconciliation, Tax Contingency, State and Local, Percent Loan collateral in process of foreclosure, financed sales collateral to third parties Loan Foreclosure Collateral Sale To Third Party Loan foreclosure collateral sale to third party. Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] Finite-Lived Intangible Assets, Major Class Name Finite-Lived Intangible Assets, Major Class Name [Domain] Treasury Stock, Common, Shares Total Shares of Common Stock Repurchased Treasury stock, shares Balance, shares Ending balance, shares Additional borrowing capacity Additional Loans from Other Federal Home Loan Banks Additional loans from other federal home loan banks. Capitalized Home Improvement Loan Origination Costs and Fees Capitalized home improvement loan origination costs and fees. Capitalized home improvement loan origination costs Cash and Cash Equivalents [Domain] Allowance as a Percent of Nonaccrual Allowance For Loan And Lease Losses Loans Acquired Percentage Of Loans Nonaccrual Allowance for loan and lease losses loans acquired percentage of loans nonaccrual. Loans originated Payment for Acquisition, Loan, Held-for-Investment Pay off one of the notes payable discount rate Extinguishment Of Debt Discount Rate Extinguishment Of Debt Discount Rate Unsecured Debt [Member] Unsecured Debt [Member] 2018 Equity Incentive Plan [Member] Two Thousand Eighteen Equity Incentive Plan [Member] Two Thousand Eighteen Equity Incentive Plan [Member] Business Combination, Consideration Transferred, Total Purchase price for City of Chicago taxi medallions out of foreclosure Business Combination, Consideration Transferred Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Preferred stock (1,000,000 shares of $0.01 par value stock authorized-none outstanding) Preferred Stock, Value, Issued Carrying amount Equity Grants Equity grants. Equity grants Maturity Dates Maturity date Debt Instrument, Maturity Date Long-term debt Line of Credit Facility, Fair Value of Amount Outstanding Minimum [Member] Minimum [Member] Weighted average grant price, granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Financial Instrument Financial Instrument [Axis] Debt instrument leverage fee Debt Instrument, Leverage Fee Debt instrument, leverage fee. Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year 2024 Total interest income Total interest income Interest Income Expense Operating Interest income expense operating. Non-Interest-Bearing Deposits [Member] Non Interest Bearing Deposits [Member] Non interest bearing deposits. Amortization of Intangible Assets, Total Amortization of intangible assets Amortization of Intangible Assets Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] Financial liabilities Liabilities, Fair Value Disclosure [Abstract] Employer matching contribution, description Defined Contribution Plan Employer Matching Contribution Description Defined contribution plan, employer matching contribution, description. Paid-in-kind interest income Paid-in-kind interest Interest Paid, Capitalized, Investing Activity Waiver Expiry Date Waiver Expiry Date Waiver expiry date. Segment Reporting [Abstract] Commercial Lending Segment [Member] Commercial lending segment. Commercial Lending Segment [Member] Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Tax Period Tax Period [Domain] Loan outstanding percent Financing Receivable, Nonaccrual, Percent Past Due Cash bonus. Cash Bonus Annual cash bonus October 1 to October 30 [Member] October 1 to October 30 [Member] October 1 to October 30. Related Party Transactions [Abstract] Summary of Securities with Gross Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Operating Loss Carryforwards, Total Net operating loss carryforwards Operating Loss Carryforwards Summary of Inclusive Capitalized Loans Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Other Income Other income Series G Fixed To Floating Rate Noncumulative Perpetual Preferred Stock [Member] Series G fixed to floating rate non-cumulative perpetual preferred stock. Series G Fixed To Floating Rate Noncumulative Perpetual Preferred Stock [Member] Commitments and contingencies Commitments and Contingencies Extended maturity date Debt Instrument Extended Maturity Date Debt instrument extended maturity date. Weighted average grant price beginning balance Weighted average grant price, ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] DZ Loan [Member] D Z Loan [Member] DZ loan. Total operating lease liabilities Total operating lease liabilities Operating Lease, Liability Auditor Firm ID Percentage Of Net Loan And Leases Receivable Percentage of net loan and leases receivable. Percentage of total loans Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Percentage of dividend payment rate Preferred Stock, Dividend Rate, Percentage Short-term borrowings Short-term debt Short-term Debt, Total Short-Term Debt Origination Fees and Costs Net Origination fees and costs, net. Origination fees and costs, net Effect of performance stock unit grants Incremental Common Shares Attributable To Dilutive Effect Of Performance Share Units Incremental common shares attributable to dilutive effect of performance share units. Line of Credit Facility, Borrowing Capacity, Description Blended advance rate description Concentration Risk Benchmark [Axis] Windows [Member] Windows [Member] Windows. September Two Thousand And Fifteen Notes [Member] September two thousand and fifteen notes. September 2015 [Member] Long-Term Debt, Maturity, Year Two 2027 Total Dividend and interest income Total Dividend and interest income Interest and Dividend Income, Operating Total interest income Total dividend and interest income Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Valuation allowance against deferred tax assets Text Block [Abstract] Remaining vesting period of restricted stock Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Bank Time Deposits [Member] Time Deposits [Member] Prior Financing Receivable, Originated, More than Five Years before Current Fiscal Year Agrregate Loans from Other Federal Home Loan Banks Agrregate loans from other federal home loan banks. Aggregate borrowing capacity Interest Income (Expense), Operating Net interest income Purchased of equity securities with readily determinable fair value Payments to Acquire Equity Method Investments Net income after taxes Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Net income after taxes Net income attributable to parent company Financing Receivable Recorded Investment Current Current Premiums in loan portfolio Past Due Loans Held for Sale at Lower of Amortized Cost or Fair Value [Member] Loans held for sale at lower of amortized cost or fair value. Effect of restricted stock grants Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Accruing Financing receivable, recorded investment, 90 days past due and still accruing Financing Receivable, 90 Days or More Past Due, Still Accruing Long-term Debt, Type Long-Term Debt, Type [Domain] Cybersecurity Risk Management Positions or Committees Responsible [Text Block] Loss Contingencies [Table] Weighted Average Number of Shares Outstanding, Basic, Total Weighted average common shares outstanding applicable to basic EPS Basic Weighted Average Number of Shares Outstanding, Basic Notes Payable to Banks Due in April 2021 [Member] Notes Payable To Banks Due April Two Thousand And Twenty One [Member] Notes payable to banks due April two thousand and twenty one. 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December 2023 [Member] Long-Lived Tangible Asset [Domain] Loan servicing fees Loan Servicing Fee Loan servicing fee. Accrued interest payable Interest Payable Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] Medallion Chicago [Member] Medallion Chicago [Member] Medallion Chicago. Subsequent Events Subsequent Events [Text Block] Stockholders Equity [Line Items] Stockholders Equity [Line Items] Stockholders Equity [Line Items] Long-term borrowings Long-term debt Long-term Debt, Total Long-Term Debt Tier 1 capital ratio Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual 2015 Director Plan [Member] Two Thousand Fifteen Director Plan [Member] Two thousand fifteen director plan. 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Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Valuation allowance against deferred tax assets Race Organization [Member] Race Organization [Member] Race Organization [Member] Parent company equity Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total stockholders’ equity Total stockholders’ equity Equity, Attributable to Parent Payments to Acquire Investments, Total Purchases of investments Payments to Acquire Investments Preferred stock, par value Preferred Stock, Par or Stated Value Per Share 7.25% Unsecured Senior Notes Due February 2026 [Member] Seven Point Two Five Percentage Unsecured Senior Notes Due February Two Thousand And Twenty Six [Member] 7.25% unsecured senior notes due February 2026. Goodwill Impairment Long Term Growth Rate Goodwill impairment long term growth rate. Goodwill impairment long term growth rate Basis of Accounting, Policy [Policy Text Block] Basis of Presentation 90 day LIBOR [Member] Ninety Day London Interbank Offered Rate Libor [Member] 90 day LIBOR. Financing Receivable, Held-for-Sale Loans held for sale Loans held for sale, at lower of amortized cost or fair value Statement of Stockholders' Equity [Abstract] Time Deposit Maturities [Table Text Block] Summary of Maturity of Deposit Pools, Including Strategic Partner Reserve Deposits Repurchase amount Aggregate principal amount Debt Instrument, Repurchase Amount September Two Thousand And Twenty Notes [Member] September two thousand and twenty notes. September 2020 [Member] Equity investments Equity Method Investments Debt, Long-term and Short-term, Combined Amount, Total Total funds borrowed Debt, Long-Term and Short-Term, Combined Amount Long term debt Debt Long Term And Short Term Funds Borrowed Amount Debt long term and short term funds borrowed amount. Aggregate principal amount Valuation Approach and Technique Valuation Approach and Technique [Domain] Use of Estimates Use of Estimates, Policy [Policy Text Block] October 2022 [Member] October Two Thousand And Twenty Two Notes [Member] October two thousand and twenty two notes. Summary of Activity for Unvested Options Outstanding Schedule of Nonvested Share Activity [Table Text Block] Credit Loss, Financial Instrument [Policy Text Block] Allowance for Credit Losses Treasury Stock [Member] Treasury Stock, Common [Member] Long-Term Debt, Maturity, Year Five 2030 Balance Sheet Components [Table] Balance Sheet Components [Table] Balance Sheet Components [Table] Condensed Statements of Operations Condensed Income Statement [Table Text Block] Fair Value of Assets and Liabilities Fair Value Disclosures [Text Block] Loans And Allowance For Loan Losses [Text Block] Loans And Allowance For Loan Losses [Text Block] Loans and Allowance for Credit Losses Other income Noninterest Income, Other, Total Noninterest Income, Other Other income, net Summary of Activity for Stock Option Programs Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] March Two Thousand And Fifteen Notes [Member] March two thousand and fifteen notes. 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Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] Carrying Amount [Member] Reported Value Measurement [Member] Investment, Type [Extensible Enumeration] Summary of Selected Financial Ratios and Other Data Investment Holdings, Schedule of Investments [Table Text Block] Ending balance, shares Number of shares outstanding Balance, shares Common Stock, Shares, Outstanding Other current liabilities Operating Lease, Liability, Current Allowance for Loan and Lease Losses Write-offs, Net, Total Net charge-offs Charge-offs, net Net charge-offs Allowance for Loan and Lease Losses, Writeoff, Net Depreciation, Depletion and Amortization, Total Depreciation and amortization Depreciation, Depletion and Amortization Cybersecurity Risk Management Processes Integrated [Flag] Document Transition Report Document Transition Report Capital Purchase Program [Member] Capital Purchase Program [Member] Capital purchase program. 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Cybersecurity Risk Management Processes Integrated [Text Block] Income (loss) before undistributed earnings of subsidiaries Net income Net income (loss) attributable to Medallion Financial Corp. Aggregate intrinsic value of option outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Loans from Other Federal Home Loan Banks Home improvement loans pledged Executive Vice President [Member] Executive Vice President [Member] Operating lease costs Operating Lease, Cost Over one year Contractual Maturities, Time Deposits, $100,000 or More, after 12 Months Funds borrowed Federal Funds Purchased, Fair Value Disclosure Investee Financial Analysis [Member] Valuation Technique Investee Financial Analysis [Member] Valuation technique investee financial analysis. Impact Of Equity Investment Impact of equity investment. 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October 2021 [Member] Transaction Type Transaction Type [Axis] Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Redemption of non-controlling interest Less: redemption of non-controlling interest Less:redemption of Series F preferred stock - funds paid in excess of carrying value Number of non-operating segments Number Of Non Operating Segments Number of non- operating segments. Fair Value of Assets and Liabilities Fair Value Measurement, Policy [Policy Text Block] Controlled Subsidiary Investment [Member] Controlled Subsidiary Investment [Member] Controlled subsidiary investment. Percentage of total gross loans Percentage Of Gross Loan And Leases Receivable Percentage Of Gross Loan And Leases Receivable Compensating Balance, Amount Non-interest-bearing compensating balance Other Liabilities, Total Other liabilities Other Liabilities Gain on taxi medallion assets, net Gain Loss on Sale of License or Permit Gain loss on sale of license or permit. 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March 1 to March 31 [Member] Preferred securities outstanding Trust Preferred Securities Outstanding Trust preferred securities outstanding. Debt instrument outstanding amount Long-Term Line of Credit Long-term Line of Credit, Total Long-term Line of Credit Debt instrument, additional leverage fee Debt Instrument, Additional Leverage Fee Debt instrument, additional leverage fee. 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Fair Value Recurring [Member] Fair Value, Recurring [Member] Total lease payments Lessee, Operating Lease, Liability, to be Paid Accounting Standards Update 2016-13 [Member] Accounting Standards Update 2016-13 [Member] Preferred stock, liquidation preference per share Preferred Stock, Liquidation Preference Per Share March Two Thousand And Seventeen Notes [Member] March two thousand and seventeen notes. March 2017 [Member] Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Equity Components Equity Components [Axis] Assets Held-in-trust, Total Aggregate assets of trust Asset, Held-in-Trust Loan amount Other Borrowings Regulatory fees Regulatory Fees Regulatory fees. Line Of Credit Facility Drawable Amount Line of Credit Facility Drawable Amount Line of credit facility drawable amount. Equity Component Equity Component [Domain] Asset Class [Axis] September Two Thousand And Eighteen Notes [Member] September two thousand and eighteen notes. September 2018 [Member] Proceeds from Noncontrolling Interests Non-controlling interest equity raised by Medallion Bank Loans Loan Commitments, Policy [Policy Text Block] Class of Stock Disclosures [Abstract] Allowance as a Percent of Loan Category Allowance For Loan And Lease Losses Loans Acquired Percentage Of Loans Allowance For Loan and Lease Losses Loans Acquired Percentage of Loans Over three months through six months Contractual Maturities, Time Deposits, $100,000 or More, Three Months Through Six Months Other expenses Other Noninterest Expense Document Annual Report Document Annual Report Deposits [Member] Deposits [Member] Advance rate Advance Rate Advance rate Proceeds from the sale and principal payments on loan collateral in process of foreclosure Proceeds From Sale And Principal Payments Of Loan Collateral In Process Of Foreclosure Proceeds from sale and principal payments of loan collateral in process of foreclosure. 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December 1 to December 31 [Member] Depreciation, Depletion and Amortization, Nonproduction, Total Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Financing Receivable, after Allowance for Credit Loss, Total Financing Receivable, after Allowance for Credit Loss Notes receivable net Total Statement of Comprehensive Income [Abstract] Total Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Write off1 Financing receivable excluding accrued interest allowance for credit loss write off1. 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Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common Stock, Value, Issued Common stock (50,000,000 shares of $0.01 par value stock authorized - 29,592,592 shares at December 31, 2025 and 29,308,182 shares at December 31, 2024 issued) Penalties Penalties. Penalties Schedule Of Financing Receivable Allowance For Credit Losses [Table] Financing Receivable, Allowance for Credit Loss [Table] Travis Burt [Member] Travis Burt [Member] Travis Burt. Loan collateral in process of foreclosure value Mortgage Loans In Process Of Foreclosure Amount Relates To Recreation Portfolio Mortgage loans in process of foreclosure amount relates to recreation portfolio. Total stockholders' equity MFIN equity Total equity Total shareholders’ equity (net assets) Balance Ending balance Equity, Including Portion Attributable to Noncontrolling Interest Privately Placed Notes [Member] Privately Placed Notes [Member] Privately placed notes. February 2021 [Member] February Two Thousand And Twenty One Notes [Member] February two thousand and twenty one notes. Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards, Total Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] Recreational Vehicles [Member] Recreational Vehicles [Member] Recreational Vehicles [Member] Ratios/supplemental data Selected Financial Ratios Investment Company, Financial Ratios [Abstract] Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent State and local income taxes, net of federal income tax benefit Manager [Member] Manager. Manager [Member] Time deposits, at or above FDIC Insurance limit Time Deposits, at or Above FDIC Insurance Limit Entity Public Float Entity Public Float Tier one risk based capital required for capital adequacy with buffer to risk weighted assets. Tier One Risk Based Capital Required for Capital Adequacy With Buffer to Risk Weighted Assets Regulatory, Minimum, tier 1 Buffer capital ratio Preferred stock, shares authorized Preferred Stock, Shares Authorized Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Total Less: comprehensive income attributable to the non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Less: comprehensive income attributable to the non-controlling interest Finite-Lived Intangible Assets by Major Class Finite-Lived Intangible Assets by Major Class [Axis] Bank Holding Company Accounting [Member] Bank Holding Companies [Member] Bank holding companies member. Schedule of Outstanding Balances of Funds Borrowed Schedule of Debt [Table Text Block] Richard Petty [Member] Richard Petty [Member] Richard Petty. Payment of withholding taxes on net settlement of vested stock Payment, Tax Withholding, Share-Based Payment Arrangement Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Entity Registrant Name Entity Registrant Name Funds Borrowed Debt Disclosure [Text Block] Goodwill and other intangibles Deferred Tax Liabilities, Goodwill and Intangible Assets, Total Goodwill and other intangibles Deferred Tax Liabilities, Goodwill and Intangible Assets Deferred tax liabilities related to goodwill and intangible assets Goodwill impairment assessment rate Goodwill Impairment Assessment Rate Goodwill impairment assessment rate. Gross Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax August Two Thousand And Twenty Four Notes [Member] August two thousand and twenty four notes. August 2024 [Member] Entity Voluntary Filers Entity Voluntary Filers Contractor Relationships [Member] Contractor Relationships [Member] Contractor Relationships [Member] Total Numbers of Shares Purchased Treasury Stock, Shares, Acquired Taxi Medallion [Member] Taxi Medallion [Member] Taxi medallion Member. State State Deferred State and Local Income Tax Expense (Benefit) Subsequent Events [Abstract] Grant price per share, upper range limit beginning balance Grant price per share, upper range limit ending balance Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Grant Price Per Share Range Upper Range Limit Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Grant Price Per Share Range Upper Range Limit Cybersecurity Risk Management Positions or Committees Responsible [Flag] Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] SOFR Rate [Member] Consolidated Entities Consolidated Entities [Domain] Income tax benefit Net provision for income taxes Total income tax provision Total income tax provision Income Tax Expense (Benefit) Income tax (provision) benefit Measurement Frequency Measurement Frequency [Axis] Other Product Lines [Member] Other Product Lines [Member] Other Product lines. Gain on sale of recreation loans held for sale Gain (Loss) on Sales of Consumer Loans Stock Repurchased During Period, Value Purchase of common stock, value Purchase of common stock Investment Company [Abstract] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Summary of Valuation Techniques and Significant Unobservable Inputs Used in Non-Recurring Level 3 Fair Value Measurements of Assets and Liabilities Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Commercial Loan [Member] Commercial [Member] Commercial Loans [Member] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding State and Municipalities [Member] US States and Political Subdivisions Debt Securities [Member] Stock Compensation Compensation Related Costs, Policy [Policy Text Block] Return On Average Assets Percentage Return on average assets Return On Average Assets Percentage Operating expenses Non Interest Expense Income Non interest expense income. Disposal Group Classification [Axis] Dz Bank [Member] Dz Bank [Member] Dz Bank [Member] Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Consolidation Items Consolidation Items [Axis] Capitalized Loan Origination Costs and Fees Capitalized loan origination costs and fees. Capitalized loan origination costs Net gains on equity investments Total Net realized losses on investments Gain (Loss) on Investments Net Asset Value Per Share, Beginning Balance Book value per share Net asset value at the end of the period/year Net Asset Value Per Share Number of shares, granted Stock based compensation award Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Total interest expense Interest Expense Net Interest expense, net. Total assets Total assets Assets Performing [Member] Performing Financial Instruments [Member] Class of Financing Receivable Class of Financing Receivable [Domain] Income Statement [Abstract] Retirement Plan Name [Domain] Financing Receivable Recorded Investment Past Due [Line Items] Financing Receivable, Past Due [Line Items] Aggregate fair value of restricted stock outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding July 1 to July 31 [Member] July 1 to July 31 Member. July 1 to July 31 [Member] Paid on or Before February 1, 2018 [Member] Debt Instrument, Redemption, Period One [Member] Less: Net gains (losses) recognized during the period on equity securities sold during the period Equity Securities, FV-NI, Realized Gain (Loss) Equity Securities, FV-NI, Realized Gain (Loss), Total Gains (Loss) on Equity Securities Gain loss on sales of loans net Gain (Loss) on Sales of Loans, Net, Total Gain (Loss) on Sales of Loans, Net Gains on sale of loans and taxi medallion Maturity date Debt Instrument Maturity Year Debt instrument, maturity year. Initial public offering shares Stock Issued During Period, Shares, New Issues Construction [Member] Construction [Member] Number of shares, vested Number of shares vested and settled Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Increase decrease in deferred financing costs. Increase Decrease In Deferred Financing Costs Decrease (increase) in deferred financing costs Diluted income per share Earnings Per Share, Diluted, Total Earnings Per Share, Diluted Diluted earnings per share Schedule of Segment Data Schedule of Segment Reporting Information, by Segment [Table Text Block] Operating Segments [Member] Operating Segments [Member] Schedule of Future Minimum Payments Under Employment Agreements Schedule Of Future Minimum Payments Under Employment Agreements Table [Text Block] Schedule of future minimum payments under employment agreementsTableTextBlock. Effective Income Tax Rate Reconciliation, Percent [Abstract] Title of Individual Title and Position [Domain] Dividends, Common Stock, Total Dividends, Common Stock Dividends paid on common stock ($0.08 per share) Dividend paid on common stock City Area Code City Area Code Other Comprehensive Income (Loss), Net of Tax, Total Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss), net of tax Other comprehensive income (loss), net of tax Financing Receivable, Credit Loss, Expense (Reversal) Allowance for credit losses Provision for credit losses Benefit for credit losses Provision (benefit) for credit losses Auditor Name Leverage fee amount Debt Instrument, Fee Amount Deposits, Total Deposits Deposits Note Amounts Debt instrument face amount Debt Instrument, Face Amount Income tax receivable Income Taxes Receivable Borrowing capacity Line of credit facility maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity December 31, 2026 To December 31, 2035 [Member] December Thirty One Two Thousand Twenty Six To December Thirty One Two Thousand Thirty Five [Member] December Thirty One Two Thousand Twenty Six to December Thirty One Two Thousand Thirty Five. Interest and fees on loans Interest and Fee Income, Loans and Leases Interest and Fee Income, Loans and Leases, Total Counterparty Name Counterparty Name [Domain] Aggregate fair value of restricted stock vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Loan, Held-for-Sale, Fair Value Disclosure Loans held for investment, net of allowance Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Exercise price per share, lower range limit beginning balance Exercise price per share, lower range limit ending balance Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Exercise Price Range Lower Range Limit Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Exercise Price Range Lower Range Limit Document And Entity Information [Table] Document And Entity Information [Table] Document and entity information table. Non Rule 10b 51 Arr Modified [Flag] Non Rule 10b 51 Arr Modified. Non Rule 10b5-1 Arrangement Modified Retirement Plan Name Retirement Plan Name [Axis] Award Date [Axis] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Officer [Member] Officer [Member] Intercompany payables Intercompany Payables Intercompany Payables Allowance for credit losses - beginning balance Allowance for credit losses Loans and Leases Receivable, Allowance, Ending Balance Loans and Leases Receivable, Allowance, Total Allowance for loan loss Allowance for loan losses - ending balance Loans and Leases Receivable, Allowance Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Award Date [Domain] Debt instrument commitments available Line of Credit Facility, Capacity Available for Trade Purchases Non Employee Director One [Member] Non Employee Director One [Member] Non Employee Director One [Member] Retained Earnings (Accumulated Deficit) [Member] Retained Earnings [Member] Tier 1 leverage capital to total assets ratio Tier One Leverage Capital Required For Capital Adequacy To Total Assets Tier one leverage capital required for capital adequacy to total assets. Average brokerage fee percentage in relation to the maturity of deposits Brokerage Fees Percentage Brokerage fees percentage. Cash and Cash Equivalents [Axis] Condensed Statement of Income Captions [Line Items] Condensed Statement of Income Captions [Line Items] Percentage of Allowance Percentage Of Allowance For Loan Losses Percentage of allowance for loan losses. Transaction Transaction [Domain] Share-based Payment Arrangement, Noncash Expense, Total Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Federal funds sold Federal Funds Sold Loans Insured or Guaranteed by Government Authorities Loans Insured or Guaranteed by Government Authorities [Domain] Employment Agreements Future Minimum Payments Due In Two Years Employment agreements future minimum payments due in two years. 2027 Total Future minimum payments Employment Agreements Future Minimum Payments Due Employment agreements future minimum payments due. Fair Value, Less than Twelve Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Wholesale Trade [Member] Wholesale Trade [Member] Wholesale trade. Medallion Bank [Member] Medallion Bank [Member] Medallion Bank. Taxi Medallion Lending [Member] Taxi Medallion Lending [Member] Taxi Medallion Lending Member. Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Operating lease liabilities Operating Lease, Liability, Noncurrent Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Class of Stock [Line Items] Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Repurchase amount Notes Payable, Total Aggregate principal amount Notes Payable Collateral Held [Domain] Retail savings deposit balance Deposits, Retail Schedule of Operating Lease Costs and Additional Information Lease, Cost [Table Text Block] Summary of Allowance for Loan Losses by Type Schedule Of Allowance For Loan Losses By Type Of Loan Table [Text Block] Schedule of allowance for loan losses by type of loan. Exercise price per share, Vested, Lower limit Grant price per share, cancelled, lower limit Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures In Period Grant Price Per Share Range Lower Range Limit Share based compensation arrangement by share based payment award equity instruments other than options forfeitures in period grant price per share range lower range limit. Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year 2022 Auditor Location Long-Term Debt [Member] Long-Term Debt [Member] Deferred Income Tax Liabilities, Net, Total Deferred tax liabilities Deferred tax liabilities, net Deferred Income Tax Liabilities, Net FSVC's [Member] Freshstart Venture Capital Corp [Member] Freshstart venture capital corp. Fair Value, due after five years through ten years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Investments, Fair Value Disclosure, Total Investments, Fair Value Disclosure Investment securities Property, equipment, and right-of-use lease asset, net Property Equipment And Right Of Use Asset Net Property equipment and right of use asset net. Boats [Member] Boats [Member] Boats. Remaining amount of debenture after deducting leverage fee kept for capitalization of retained earning or capital infusion Remaining Amount Of Debenture After Deducting Leverage Fee Remaining amount of debenture after deducting leverage fee. Change in deferred and other tax assets/liabilities, net Increase (Decrease) in Other Deferred Liability Increase (decrease) in deferred and other tax liabilities, net Precedent Market Transactions [Member] Valuation Technique Precedent Market Transactions [Member] Valuation technique precedent market transactions. Condensed Statements of Cash Flow Condensed Cash Flow Statement [Table Text Block] June 1 to June 30 [Member] June 1 to June 30 Member. June 1 to June 30 [Member] Measurement Input Financial Condition and Operational Performance [Member] Measurement Input Financial Condition And Operational Performance [Member] Measurement input financial condition and operational performance. Income Tax Jurisdiction [Domain] Debt Securities Available For Sale [Table] Debt Securities, Available-for-Sale [Table] Entity Interactive Data Current Entity Interactive Data Current Over six months through one year Contractual Maturities, Time Deposits, $100,000 or More, 6 Months through 12 Months Fair Value Measurement Fair Value Measurement [Domain] CASH FLOWS FROM OPERATING ACTIVITIES Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Repayments of Lines of Credit Repayments of Lines of Credit Financing Receivable, Excluding Accrued Interest, Year Six, Originated, Five Years before Current Fiscal Year, Writeoff 2020 Amount, excluding accrued interest, of writeoff of financing receivable originated five years before current fiscal year. Excludes net investment in lease. Interest paid in kind Paid-in-Kind Interest Proceeds from funds borrowed Proceeds from time deposits and funds borrowed Proceeds from Related Party Debt Disposition and Exit of Equity Investments [Member] Disposition and Exit of Equity Investments [Member] Disposition and exit of equity investments Cumulative Effect, Period of Adoption, Adjusted Balance [Member] December 31, 2022 Pre-Topic 326 Adoption Cumulative Effect, Period of Adoption, Adjusted Balance [Member] Long term debt under capital infusion Long Term Debt Under Capital Infusion Long term debt under capital infusion. Catastrophic Event Catastrophic Event [Domain] Total capital Banking Regulation, Total Capital, Actual Net income attributable to parent company Undistributed Earnings (Loss) Available to Common Shareholders, Basic Net Change In Unrealized Gains Losses Net Of Tax Net change in unrealized gains (losses) on investments, net of tax Net change in unrealized gains losses net of tax. Net change in unrealized gains on investments, net of tax Net change in unrealized gains (losses) on investments, net of tax Cumulative Effect, Period of Adoption [Domain] September Two Thousand And Twenty Three Notes [Member] September two thousand and twenty three notes. September 2023 [Member] Regulatory Capital Regulatory Capital Requirements Policy Policy [Text Block] Regulatory capital requirements Policy. Entity Tax Identification Number Entity Tax Identification Number Stockholders’ equity Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Long-term Debt, Type Long-Term Debt, Type [Axis] Condensed Income Statement [Table] Condensed Income Statement [Table] Debentures term Maturity term Debt Instrument, Term Organization of Medallion Financial Corp. and its Subsidiaries Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Local Phone Number Local Phone Number Roofs [Member] Roofing [Member] Roofing. Weighted average common shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Auditor Opinion [Text Block] Auditor Opinion Affiliate Investment [Member] Affiliate Investment [Member] Affiliate investment. Investment in bank subsidiary Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure Total other expenses Noninterest Expense Schedule Of Financing Receivable Recorded Investment Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] Accounting Policies [Abstract] Commercial Banks [Member] Commercial Banks [Member] Commercial banks. Consumer Lending [Member] Consumer Lending [Member] Consumer Lending [Member] Changes In Equity And Comprehensive Income Line Items [Line Items] Changes In Equity And Comprehensive Income Line Items [Line Items] Changes in equity and comprehensive income line items. Forfeiture of restricted stock, net, shares Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Forfeiture of restricted stock, net, shares Commercial [Member] Commercial [Member] Commercial. May 2016 [Member] May Two Thousand And Sixteen Notes [Member] May two thousand and sixteen notes. Listing services deposits from other financial institutions. Listing Services Deposits From Other Financial Institutions Listing services deposits from other financial institutions. Average borrowings outstanding Average Borrowings Outstanding Average borrowings outstanding. Lessee, Operating Lease, Liability, to be Paid, Year Four 2029 Class of Stock Class of Stock [Domain] Preferred securities repurchased from a third party investor Payments for Repurchase of Trust Preferred Securities Commercial Paper [Member] Commercial Paper [Member] Salaries and employee benefits Labor and Related Expense Salaries and employee benefits Number of shares available for grant Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Unrecognized compensation cost related to unvested stock options and restricted stock, recognition period Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Historical and Actual Loss Experience [Member] Measurement Input Historical And Actual Loss Experience [Member] Measurement input historical and actual loss experience. Net Amortization to income Net amortization to income Net amortization to income Amortization Of Loan Origination Fees Net Amortization of loan prigination fees, net. Affiliated Entity [Member] Affiliated Entity [Member] Decrease in intercompany payables Increase Decrease In Inter Company Payables Increase decrease in inter company payables. Schedule Of Stock By Class [Table] Stock, Class of Stock [Table] Entity Emerging Growth Company Entity Emerging Growth Company Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Remaining contractual life of option vested