Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Private Label Private Label [Member] Private Label Aggregate UPB Financing Receivable, Held-for-Sale Maximum Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Offsetting Assets Offsetting Derivative Assets [Abstract] Restricted Shares and Restricted Stock Units Restricted Stock and Restricted Stock Units [Member] Restricted Stock and Restricted Stock Units Impairment Impairment Servicing Asset at Amortized Cost, Other than Temporary Impairments Funded Funded Loan Commitment [Member] Funded Loan Commitment Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Carrying Amount Reported Value Measurement [Member] Diluted net income/(loss) applicable to common stockholders Net Income (Loss) Available to Common Stockholders, Diluted Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Prepayments and write-offs Servicing Asset at Amortized Cost, Other Changes that Affect Balance, Amount Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Ending Weighted Average Interest Rate Weighted Average Interest Rate Debt, Weighted Average Interest Rate Charge offs Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery) Adjustment to Compensation, Amount Adjustment to Compensation Amount Pledged Status [Axis] Pledged Status [Axis] Financial Instrument [Axis] Financial Instrument [Axis] Real Estate [Line Items] Real Estate [Line Items] Segment Reporting [Abstract] Segment Reporting [Abstract] Type of Reserve [Domain] Type of Reserve [Domain] Schedule of Expected Amortization of MSRs Schedule of Expected Future Amortization Expense Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block] Net income/(loss) applicable to common stock, diluted Net Income (Loss) Available to Common Stockholders, Diluted, Including Undistributed Earnings (Loss) Allocated to Participating Securities Net Income (Loss) Available to Common Stockholders, Diluted, Including Undistributed Earnings (Loss) Allocated to Participating Securities Asset management and subordinated performance fee Asset Management and Subordinated Performance Fee [Member] Asset Management and Subordinated Performance Fee Beginning balance Ending balance Loss Contingency Accrual Number of Loans in pool Debt Instrument, Collateral, Number Of Mortgage Assets Debt Instrument, Collateral, Number of Mortgage Assets Leases Lessee, Finance Leases [Text Block] Guarantor obligations, maximum exposure, undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Fixed Rate Fixed Rate [Member] Fixed Rate Accretion of deferred commitment fees Amortization of Deferred Loan Origination Fees, Net Accrued compensation Employee-related Liabilities Derivative Instrument [Axis] Derivative Instrument [Axis] Amortized Cost by Year of Origination Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] Servicing asset at fair value, amount Servicing Asset at Fair Value, Amount Equity method investments Business Combination, Recognized Asset Acquired, Investment in Debt and Equity Securities, Current Measurement Frequency [Axis] Measurement Frequency [Axis] Consolidated Entities [Axis] Consolidated Entities [Axis] Common stock shares repurchased, average price per share (in dollars per share) Net average purchase price (in dollars per share) Shares Acquired, Average Cost Per Share Repayments of repurchase agreements and revolving credit facilities - commercial mortgage loans Payments From Securities Purchased Under Agreements To Resell, Loans Receivable Payments From Securities Purchased Under Agreements To Resell, Loans Receivable Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Financial Instrument Performance Status [Domain] Financial Instrument Performance Status [Domain] Realized gain/(loss) on sale of commercial mortgage loans, held for sale, measured at fair value Gain (Loss) On Sale Of Mortgage Loans, Fair Value Disclosure Gain (Loss) On Sale Of Mortgage Loans, Fair Value Disclosure Developed Technology Rights Developed Technology Rights [Member] Discount rate (percentage) Fair Value Inputs, Discount Rate Fair Value Inputs, Discount Rate Diluted Numerator Diluted Numerator [Abstract] Diluted Numerator Amortization expense Amortization 2031 and beyond Lessor, Operating Lease, Payment to be Received, After Year Four Lessor, Operating Lease, Payment to be Received, After Year Four Leases [Abstract] Leases [Abstract] Unsecured Debt Unsecured Junior Debt [Member] Unsecured Junior Debt Related Party Transactions and Arrangements Related Party Transactions Disclosure [Text Block] Consolidated Entities [Domain] Consolidated Entities [Domain] Distributions to non-controlling interest Payments to Noncontrolling Interests Proceeds from sale of real estate owned, held for sale Proceeds from Sale of Other Real Estate Prior Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year Common stock, par value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Total Intangible Asset, Excluding Goodwill, after Accumulated Amortization Premium amortization and (discount accretion), net Accretion (Amortization) of Discounts and Premiums, Investments Pledged assets Principal Balance of Collateralized Mortgage Assets Debt Instrument, Collateral Amount Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Number of reportable segments Number of Reportable Segments Investment securities, held to maturity Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss Accrued compensation Increase (Decrease) in Accrued Salaries Interest on escrows Interest Earned on Escrows Interest Earned on Escrows Schedule of Derivative Assets at Fair Value Schedule of Derivative Assets at Fair Value [Table Text Block] Concentration Risk [Table] Concentration Risk [Table] Schedule of Commercial Mortgage Loans Held for Investment Activity Real Estate Notes Receivable Rollforward [Table Text Block] Real Estate Notes Receivable Rollforward [Table Text Block] Amortized cost Amortized Cost Amortized cost basis Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Securities Sold under Agreements to Repurchase Securities Sold under Agreements to Repurchase [Member] Entity Address, City or Town Entity Address, City or Town Income/(loss) before taxes Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax Class of Financing Receivable [Domain] Class of Financing Receivable [Domain] Receivables [Abstract] Receivables [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] 4 Investment Rating 4 [Member] Investment Rating 4 [Member] 2022-FL8 Issuer Collateralized Loan Obligations Issued in 2022-FL8 [Member] Collateralized Loan Obligations Issued in 2022-FL8 Total Intangible Asset, Finite-Lived, after Accumulated Amortization Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Return of capital from equity method investments Proceeds from Equity Method Investment, Distribution, Return of Capital Senior loans Senior Loans [Member] Level II Fair Value, Inputs, Level 2 [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Change in net assets of consolidated VIE, CMBS trust Change in net assets of consolidated variable interest entity Change In Net Assets Of Variable Interest Entity, CMBS Trust Change In Net Assets Of Variable Interest Entity Other comprehensive income/(loss) Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] 2029 Lessor, Operating Lease, Payment to be Received, Year Three 90 or more days past due Financial Asset, Equal to or Greater than 90 Days Past Due [Member] Revenue Benchmark Revenue Benchmark [Member] Liability for loans eligible for repurchase Loan Repurchase Option, Liabilities Loan Repurchase Option, Liabilities Proceeds from sale or repayment of commercial mortgage loans, held for sale, measured at fair value Proceeds from Sale, Loan, Mortgage, Held-for-Sale Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Financial Instruments Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Schedule of Operations by Segment Segment Reporting [Table Text Block] Pledged investment securities Securities Loaned, Fair Value of Collateral Use of Estimates Use of Estimates, Policy [Policy Text Block] Related Party [Axis] Related and Nonrelated Parties [Axis] WF Repo Facility WF Repo Facility [Member] WF Repo Facility [Member] Consolidation of CMBS trust Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Consolidation of CMBS Trust Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Consolidation of CMBS Trust Schedule of Lessee, Operating Lease, Liability, to be Paid, Maturity Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Allowance for Loss Sharing Contingencies Disclosure [Text Block] Supplemental disclosures of non - cash flow information: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Allowance for credit loss Less: Allowance for credit losses Allowance for credit losses, beginning of period Allowance for credit losses, end of period Beginning balance Ending balance Allowance for credit losses Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest Document Period End Date Document Period End Date Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Par Value Principal amount Debt Instrument, Face Amount 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Investment securities, held to maturity Business Combination, Recognized Asset Acquired, Restricted Investment Securities Business Combination, Recognized Asset Acquired, Restricted Investment Securities Interest rate, effective percentage Debt Instrument, Interest Rate, Effective Percentage Contributions from non-controlling interest Proceeds from Noncontrolling Interests Equity Method Investment, Nonconsolidated Investee [Axis] Equity Method Investment, Nonconsolidated Investee [Axis] Receivable for loan repayment Receivables For Loan Repayment Receivables For Loan Repayment Repurchase agreements Repurchase agreements Repurchase agreements, net amount of liabilities presented on the balance sheet Securities Sold under Agreements to Repurchase 2028 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Two Accumulated other comprehensive income/(loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Mortgage note payable Mortgages Mortgages [Member] Earnings Per Share Earnings Per Share [Text Block] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Offsetting Liabilities [Line Items] Offsetting Liabilities [Line Items] Document Fiscal Period Focus Document Fiscal Period Focus Revenue from real estate owned Lease Income Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Treasury note futures Treasury Note Futures [Member] Treasury Note Futures [Member] Schedule of Activity Related to MSRs Servicing Asset at Amortized Cost [Table Text Block] Total liabilities Total Liabilities Liabilities Trading Symbol Trading Symbol Real estate securities, available for sale, measured at fair value, amortized cost of $187,905 and $151,946 as of June 30, 2026 and December 31, 2025, respectively Fair Value Real estate securities, available for sale, measured at fair value Debt Securities, Available-for-Sale, Excluding Accrued Interest Allowance for Credit Loss, Combined Specific Allowance for Credit Loss, Combined Specific [Member] Allowance for Credit Loss, Combined Specific Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] Servicing revenue, net Total servicing revenue, net Servicing revenue Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset Schedule of Allocation of the Purchase Consideration Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Company Selected Measure Name Company Selected Measure Name Purchase of real estate securities, available for sale Payments to Acquire Debt Securities, Available-for-Sale Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Less: Interest expense Interest expense Interest expense Interest Expense, Deposits Offsetting Liabilities [Table] Offsetting Liabilities [Table] Concentration Risk [Line Items] Concentration Risk [Line Items] BSPRT 2026-FL13 Notes BSPRT 2026-FL13 Notes [Member] BSPRT 2026-FL13 Notes Financial Instrument Performance Status [Axis] Financial Instrument Performance Status [Axis] Year one, originated in current fiscal year Financing Receivable, Excluding Accrued Interest, Year One, Originated, Current Fiscal Year April 2026 Reauthorization April 2026 Reauthorization [Member] April 2026 Reauthorization Credit Facility [Domain] Credit Facility [Domain] Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Preferred stock converted to common stock, per share stock consideration (in shares) Conversion of Stock, Preferred Stock Converted To Common Stock, Per Share Stock Consideration Conversion of Stock, Preferred Stock Converted To Common Stock, Per Share Stock Consideration Acquisition fees and expenses, amount capitalized Acquisition Fees And Expenses, Amount Capitalized [Member] Acquisition Fees And Expenses, Amount Capitalized [Member] Common dividends paid (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Weighted Average Days to Maturity Debt Instrument, Weighted Average Days To Maturity Debt Instrument, Weighted Average Days To Maturity Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Percent of excess total return Related Party Transaction Subordinated Participation In Asset Sale Fee Related Party Transaction Subordinated Participation In Asset Sale Fee Transfers out of Level III Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 Line of Credit Facility [Table] Line of Credit Facility [Table] Distributions declared Dividends Distributions payable Distribution payable Dividends Payable Gross unrealized loss on CLO bonds Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), before Tax Goodwill, expected tax deductible Business Combination, Goodwill, Expected Tax Deductible, Amount Schedule of Financial Instruments Carried at Fair Value on a Recurring Basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Other Intangible Assets Other Intangible Assets [Member] Allowance acquired in acquisition Loss Contingency Accrual Allowance Acquired in Acquisition Loss Contingency Accrual Allowance Acquired in Acquisition Operating cash outflows from operating leases Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Level I Fair Value, Inputs, Level 1 [Member] Software development Software, Internally Developed [Member] Various Various Locations [Member] Various Geographic Locations Schedules of Concentration of Risk, by Risk Factor Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Gain (loss) from commercial mortgage loans, held for sale, measured at fair value Gain (Loss) on Sale of Financing Receivable Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Derivative assets Business Combination, Recognized Asset Acquired, Derivative Assets Business Combination, Recognized Asset Acquired, Derivative Assets Cost recovery Financing Receivable, Excluding Accrued Interest, Cost Recovery Financing Receivable, Excluding Accrued Interest, Cost Recovery Class of Financing Receivable [Axis] Class of Financing Receivable [Axis] Preferred stock, par value per share (in dollars per share) Preferred Stock, Par or Stated Value Per Share Scenario [Domain] Scenario [Domain] Antidilutive Securities [Axis] Antidilutive Securities [Axis] JP Morgan Securities LLC JP Morgan Securities LLC [Member] JP Morgan Securities LLC [Member] Operating lease, ROU Operating Lease, Right-of-Use Asset Concentration Risk Type [Domain] Concentration Risk Type [Domain] Far West Far West [Member] Far West Commercial mortgage loans, at fair value Loan, Mortgage, Fair Value Disclosure Loan, Mortgage, Fair Value Disclosure Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] February 2026 Reauthorization February 2026 Reauthorization [Member] February 2026 Reauthorization Real Estate Securities Investment in Debt and Equity Securities and Other Trading Assets [Text Block] (Gain)/loss on derivative instruments Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments Amount Outstanding Long-Term Line of Credit Expiration Date Trading Arrangement Expiration Date Real Estate [Table] Real Estate [Table] Other related party expenses Other Related Party Expenses [Member] Other Related Party Expenses [Member] Fannie Mae Fannie Mae [Member] Fannie Mae Restricted cash Restricted cash, beginning of period Restricted cash, end of period Restricted Cash and Cash Equivalent Total equity Balance, Beginning of Period Balance, End of Period Equity, Including Portion Attributable to Noncontrolling Interest Nonrelated Party Nonrelated Party [Member] Affiliated Entity Affiliated Entity [Member] Loss sharing under the DUS program Loss Contingency, Estimate of Possible Loss Building and Improvements Building and Building Improvements [Member] Unsecured debt Unsecured Debt Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Derivative [Table] Derivative [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Nature of Operation, Product Information, Concentration of Risk [Table] Nature of Operation, Product Information, Concentration of Risk [Table] Rocky Mountain Rocky Mountain [Member] Rocky Mountain Servicing portfolio Financing Receivable, Loan Servicing Portfolio Financing Receivable, Loan Servicing Portfolio Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Related Party Transaction [Axis] Related Party Transaction [Axis] Net income (loss) attributable to Franklin BSP Realty Trust, Inc. Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax 2027 Lessor, Operating Lease, Payment to be Received, Year One Segments [Domain] Segments [Domain] Extension period on initial maturity date Debt Instrument, Extension On Initial Maturity Date Debt Instrument, Extension on Initial Maturity Date Mortgage Banking [Abstract] NewPoint JV LLC NewPoint JV LLC [Member] NewPoint JV LLC Debt Debt Disclosure [Text Block] Scenario [Axis] Scenario [Axis] Convertible Preferred Stock Convertible Preferred Stock [Member] Commercial mortgage loans, held for sale, measured at fair value Business Combination, Recognized Asset Acquired, Mortgages Held For Sale Fair Value Disclosure Business Combination, Recognized Asset Acquired, Mortgages Held For Sale Fair Value Disclosure Business Combination [Table] Business Combination [Table] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Secured debt Secured Debt [Member] Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Southwest Southwest [Member] Southwest Purchase of and contributions to equity method investments Payments to Acquire Equity Method Investments Interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage Total stockholders' equity Equity, Attributable to Parent Unamortized deferred financing costs Deferred Debt Issuance Cost, Writeoff Real Estate [Domain] Real Estate [Domain] ASSETS Assets Assets, at fair value Assets [Abstract] Equity interest (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Schedule of Allocation by Risk Rating Financing Receivable Credit Quality Indicators [Table Text Block] Seller-based financing on sales of real estate owned, held for sale Seller Based Financing On Sales Of Real Estate Owned Held For Sale Seller Based Financing On Sales Of Real Estate Owned Held For Sale Fair Value, Nonrecurring Fair Value, Nonrecurring [Member] Professional fees Professional Fees Insider Trading Policies and Procedures [Line Items] Nonperforming Financial Instruments Nonperforming Financial Instruments [Member] Add: Net income/(loss) from non-controlling interest - OP Units Net Income/(Loss) From Non-Controlling Interest - OP Units Net Income/(Loss) From Non-Controlling Interest - OP Units October 2022 Multifamily October 2022 Multifamily [Member] October 2022 Multifamily Financing Receivable Portfolio Segment [Domain] Financing Receivable Portfolio Segment [Domain] Par Value Financing Receivable, Excluding Accrued Interest, Before Allowance For Credit Losses Financing Receivable, Excluding Accrued Interest, Before Allowance For Credit Losses Antidilutive securities excluded from computation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Number of operating segments Number of Operating Segments Goodwill Goodwill [Table Text Block] Dispositions Mortgage Loans On Real Estate, Dispositions Mortgage Loans On Real Estate, Dispositions Entity Central Index Key Entity Central Index Key Equity: Equity [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Unsecured Senior Notes I Unsecured Senior Notes I [Member] Unsecured Senior Notes I Credit default swaps Credit default swaps Other Credit Derivatives [Member] Other comprehensive income/(loss) Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Pledging Purpose [Axis] Pledging Purpose [Axis] Ownership [Axis] Ownership [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Preferred stock dividend rate percentage Preferred Stock, Dividend Rate, Percentage Loss sharing obligations Guarantee Obligations Included In Allowance For Loss Sharing Obligations Guarantee Obligations Included In Allowance For Loss Sharing Obligations Weighted Average Spread Weighted Average Spread Debt Instrument, Basis Spread on Variable Rate Amortized Cost SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] Variable Rate [Domain] Variable Rate [Domain] Accumulated Other Comprehensive Income/(Loss) AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Servicing and ancillary fees Ancillary Fee Income Generated by Servicing Financial Assets, Amount Schedule of Loss Contingencies by Contingency Schedule of Loss Contingencies by Contingency [Table Text Block] Distributions paid Payments of Dividends Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Current expected credit losses Impact Of Adopting Current Expected Credit Losses Impact Of Adopting Current Expected Credit Losses Issuance of common stock Business Combination, Consideration Transferred, Equity Interest Statement [Line Items] Statement [Line Items] Total assets Total Assets Assets Unsecured notes Unsecured Debt, Current Acquisition fees and expenses, including amount capitalized Acquisition Fees And Expenses Including Amount Capitalized [Member] Acquisition Fees And Expenses Including Amount Capitalized [Member] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Accrued Interest Receivable Business Combination, Recognized Asset Acquired, Accrued Interest Receivable Business Combination, Recognized Asset Acquired, Accrued Interest Receivable Assets Sold under Agreements to Repurchase [Line Items] Assets Sold under Agreements to Repurchase [Line Items] Equity Method Investment, Nonconsolidated Investee [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] Unfunded commitments to fund loans and sell loans Financing Receivable, Commitment to Purchase or Sell, Amount Portland, OR Portland, Oregon [Member] Portland, Oregon Collateralized loan obligations Loans Payable, Fair Value Disclosure Schedule of Assets Sold under Agreements to Repurchase [Table] Asset Sold under Agreement to Repurchase [Table] Unrealized Gain Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Total liabilities assumed Business Combination, Recognized Liability Assumed, Liability PEO PEO [Member] Annualized Effective Service Fee Rate Management and Service Fees, Rate CMBS Trust CMBS Trust [Member] CMBS Trust Loan repurchase option liability Business Combination, Recognized Liability Assumed, Loan Repurchase Option Liability Business Combination, Recognized Liability Assumed, Loan Repurchase Option Liability Other liabilities Other Liabilities, Noncurrent Goodwill Beginning balance Ending balance Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Subordinated performance fee, percent that total return exceeds per year Related Party Transaction Subordinated Performance Fee Total Return Threshold Related Party Transaction Subordinated Performance Fee Total Return Threshold Accumulated Deficit Retained Earnings [Member] Principal repayments SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Collections of Principal Total expenses Total expenses Operating Expenses Revolver Facility Revolving Credit Facility [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Schedule of Financial Instruments Not Carried at Fair Value Fair Value, by Balance Sheet Grouping [Table Text Block] Offsetting Repurchase Agreements Offsetting Securities Sold under Agreements to Repurchase [Abstract] Financing Receivable, Past Due [Line Items] Financing Receivable, Past Due [Line Items] Diluted earnings per share (in dollars per share) Earnings Per Share, Diluted Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Unrealized Gain/(Loss) from Investments Unrealized gain/(loss) Unrealized Gain (Loss) on Investments Purchase of real estate owned and capital expenditures Payments To Acquire Real Estate Owned Payments To Acquire Real Estate Owned Intangible Asset, Finite-Lived [Line Items] Intangible Asset, Finite-Lived [Line Items] Ownership [Domain] Ownership [Domain] Year four, originated in prior fiscal year three Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year Realized and unrealized gain/(loss) included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings, Sale of Commercial Mortgage Loan Held For Sale Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings, Sale of Commercial Mortgage Loan Held For Sale Additions Servicing Asset at Amortized Cost, Additions Schedule of Offsetting Assets Offsetting Assets [Table Text Block] Net unrealized loss on CLO bonds Debt Securities, Available-for-Sale, Accumulated Net Unrealized Gain (Loss), before Tax Debt Securities, Available-for-Sale, Accumulated Net Unrealized Gain (Loss), before Tax Total assets acquired Business Combination, Recognized Asset Acquired, Asset Intangible asset Intangible Asset, Finite-Lived, Acquired Interest Payable Business Combination, Recognized Liability Assumed, Interest Payable Business Combination, Recognized Liability Assumed, Interest Payable Total Revenue/Investment Income Referral Fee Income Revenue from Contract with Customer, Excluding Assessed Tax Schedule of Derivative Liabilities at Fair Value Schedule of Derivative Liabilities at Fair Value [Table Text Block] Schedule of Equity Method Investments Equity Method Investments [Table Text Block] Fifth Third WH Line of Credit Fifth Third WH Line of Credit [Member] Fifth Third WH Line of Credit Real estate owned, gross Real Estate Owned, Held For Investment, Gross Real Estate Owned, Held For Investment, Gross Common stock repurchases Common stock shares repurchased Stock Repurchased During Period, Value Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Floating Rate Floating Rate [Member] Floating Rate Carrying Value Intangible Asset, Excluding Goodwill, before Accumulated Amortization Commercial Mortgage Loans Held For Sale Commercial Mortgage Loans Held For Sale [Member] Commercial Mortgage Loans Held For Sale Interest payable Increase (Decrease) in Interest Payable, Net Sales/paydowns Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Business Combination, Pro Forma Information [Table] Business Combination, Pro Forma Information [Table] December 2021 Multifamily December 2021 Multifamily [Member] December 2021 Multifamily Equity Method Investment [Table] Equity Method Investment [Table] Escrow deposit Escrow Deposit Multifamily Multifamily [Member] Gain/(loss) on derivatives Derivative, Gain (Loss) on Derivative, Net Repurchase agreements - commercial mortgage loans Commercial Mortgage Loans [Member] Commercial Mortgage Loans [Member] Related Party Transaction [Domain] Related Party Transaction [Domain] Business Combinations Business Combination [Text Block] Other financings Notes Payable, Fair Value Disclosure Basic Numerator Basic Numerator [Abstract] Numerator [Abstract] Options Equity Option [Member] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] ARIZONA ARIZONA Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Schedule of Changes in Allowance for Credit Losses Financing Receivable, Allowance for Credit Loss [Table Text Block] Common stock, shares issued (in shares) Common Stock, Shares, Issued Debt Instrument, Interest Rate Floor Debt Instrument, Interest Rate Floor Debt Instrument, Interest Rate Floor Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Realized (gain)/loss on sale of commercial mortgage loans, held for sale, measured at fair value Realized Gain (Loss) On Sale Of Mortgage Loans Held For Sale Measured At Fair Value Mortgage servicing rights Originated Mortgage Servicing Rights Revenue Originated Mortgage Servicing Rights Revenue Weighted average servicing fee (as basis points) Contractually Specified Servicing Fees, Percentage Contractually Specified Servicing Fees, Percentage Affordable Affordable [Member] Affordable Product and Service [Domain] Product and Service [Domain] Lucid Prime Fund Lucid Prime Fund [Member] Lucid Prime Fund Class of Stock [Line Items] Class of Stock [Line Items] California CALIFORNIA Real Estate Owned Real Estate Owned [Member] Real Estate Owned [Member] Gain/(loss) on other real estate investments Gains (Losses) on Sales of Other Real Estate Net income (loss) attributable to Franklin BSP Realty Trust, Inc. Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Number of positions with gross unrealized (loss) gain period less than 12 months Debt Securities, Available-for-Sale, Unrealized Gross Gain (Loss) Position, Number of Positions Debt Securities, Available-for-Sale, Unrealized Gross Gain (Loss) Position, Number of Positions Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Initial risk rating Initial Risk Rating Of Loans Initial Risk Rating of Loans 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Repurchase agreements, gross amounts not offset on the balance sheet, financial instruments Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Security Not Offset Less than 90 days past due Financial Asset, Less Than 90 Days Past Due [Member] Financial Asset, Less Than 90 Days Past Due Subsequent Events [Abstract] Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Net Amount Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Due to affiliates Other Liabilities, Current Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Conversion of stock, preferred stock to common stock, notice period Conversion of Stock, Preferred Stock To Common Stock, Notice Period Conversion of Stock, Preferred Stock To Common Stock, Notice Period CMBS Bonds CMBS Bonds [Member] CMBS Bonds Fair Value as of Grant Date Award Grant Date Fair Value Goodwill [Table] Goodwill [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Remaining amount available under share repurchase program Share Repurchase Program, Remaining Authorized, Amount Arrangement Duration Trading Arrangement Duration Repurchase agreements, gross amounts not offset on the balance sheet, cash collateral Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset Retail Retail Site [Member] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items] Compliance with Regulatory Capital Requirements for Mortgage Companies [Line Items] (Gain)/loss from other real estate investments Change in Unrealized Gain (Loss) On Other Real Estate Owned Change in Unrealized Gain (Loss) on Other Real Estate Owned Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Maximum annual subordinated performance fee payable percent of total return Related Party Transaction Subordinated Participation In Asset Sale Fee Maximum Related Party Transaction Subordinated Participation In Asset Sale Fee Maximum Finite-lived intangible, carrying value Intangible Asset, Finite-Lived, before Accumulated Amortization Total income Revenues Atlas Repo Facility Atlas Repo Facility [Member] Atlas Repo Facility Income/(loss) from equity method investments Income/(loss) from equity method investments Income (Loss) from Equity Method Investments Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Less: Removal of non-performing loan amortized cost Financing Receivable, Excluding Accrued Interest, Nonaccrual, Removal Of Carrying Value Financing Receivable, Excluding Accrued Interest, Nonaccrual, Removal Of Carrying Value Gain/(loss) on other real estate investments Gain (Loss) On Other Real Estate Investments Gain (Loss) On Other Real Estate Investments Goodwill [Roll Forward] Goodwill [Roll Forward] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Award Type [Domain] Award Type [Domain] 2026 (Six Months Ended December 31, 2026) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Other Other Real Estate Property [Member] Other Real Estate Property Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Level III Fair Value, Inputs, Level 3 [Member] Asset Pledged as Collateral Asset Pledged as Collateral [Member] Conduit Taxable REIT Subsidiaries [Member] Taxable REIT Subsidiaries [Member] Shares Treasury Stock, Shares, Acquired 2027 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Noncontrolling interest, ownership percentage by noncontrolling owners Subsidiary, Ownership Percentage, Noncontrolling Owner Junior Note III Junior Subordinated Note III, Maturing September 2036 [Member] Junior Subordinated Note III, Maturing September 2036 Geographical [Axis] Geographical [Axis] CLO cash held by servicer Restricted cash Restricted Cash Total future minimum rent Lessor, Operating Lease, Payment to be Received Legal Entity [Axis] Legal Entity [Axis] Interest paid on unsecured debt Interest Expense, Debt Proceeds from sale/(purchase) of derivative instruments Payments for (Proceeds from) Derivative Instrument, Investing Activities Acquired MSRs at July 1, 2025 Payments to Acquire Mortgage Servicing Rights (MSR) Schedule of Mortgage Loans, Held for Sale Schedule of Mortgage Loans, Held for Sale [Table Text Block] Schedule of Mortgage Loans, Held for Sale Repurchases paid Treasury Stock, Value, Acquired, Cost Method Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Cash, cash equivalents and restricted cash, Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Net income/(loss) applicable to common stock, basic Net Income (Loss) Available to Common Stockholders, Basic, Including Undistributed Earnings (Loss) Allocated to Participating Securities Net Income (Loss) Available to Common Stockholders, Basic, Including Undistributed Earnings (Loss) Allocated to Participating Securities Schedule of Real Estate Owned, Held For Investment Real Estate Owned, Held For Investment [Table Text Block] Real Estate Owned, Held For Investment Non-NEOs Non-NEOs [Member] Provision for Credit Losses Financing Receivable, Allowance for Credit Loss [Roll Forward] Hospitality Property Hospitality Property [Member] Hospitality Property Garfield PG JV HoldCo LLC Garfield PG JV HoldCo LLC [Member] Garfield PG JV HoldCo LLC Equity method investment, ownership percentage Equity Method Investment, Ownership Percentage Purchase of NewPoint Holdings JV LLC Payments to Acquire Businesses, Gross 2028 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two June 2021 Multifamily June 2022 Multifamily [Member] June 2022 Multifamily MS Repo Facility MS Repo Facility [Member] MS Repo Facility Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Four Finite-Lived Intangible Assets, Amortization Expense, after Year Four Schedule of Debt Schedule of Debt [Table Text Block] Investment, Name [Domain] Investment, Name [Domain] GEORGIA GEORGIA Leases Lessee, Operating Leases [Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Payments for common stock repurchases Payments for Repurchase of Common Stock Riverwalk Aker BSP Venture LLC Riverwalk Aker BSP Venture LLC [Member] Riverwalk Aker BSP Venture LLC Statistical Measurement [Axis] Statistical Measurement [Axis] Schedule of Derivative Instruments, Gain (Loss) Derivative Instruments, Gain (Loss) [Table Text Block] Award Type [Axis] Award Type [Axis] Acquisition expenses Acquisition Expenses [Member] Acquisition Expenses 2026 (Six Months Ended December 31, 2026) Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Mideast Mideast [Member] Mideast Accumulated deficit Retained Earnings (Accumulated Deficit) Deferred fees and other items SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Other Addition Florida FLORIDA Product and Service [Axis] Product and Service [Axis] Repurchase agreements - real estate securities Real Estate Securities [Member] Real Estate Securities [Member] Loan repurchase option asset Business Combination, Recognized Asset Acquired, Loan Repurchase Option Asset Business Combination, Recognized Asset Acquired, Loan Repurchase Option Asset Agency Business Agency [Member] Agency Junior Note I Junior Subordinated Note I, Maturing October 2035 [Member] Junior Subordinated Note I, Maturing October 2035 Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Borrowings on collateralized loan obligations Proceeds from Issuance of Secured Debt Common Stock Common Stock [Member] PNC WH Line of Credit PNC WH Line of Credit [Member] PNC WH Line of Credit Operating lease cost Operating Lease, Cost Yield (percentage) Fair Value Inputs, Yield Fair Value Inputs, Yield Company holds common units, membership interest, rate Company Holds Common Units, Membership Interest, Rate Company Holds Common Units, Membership Interest, Rate Accounts payable and accrued expenses Business Combination, Recognized Liability Assumed, Accounts Payable and Accrued Expenses, Current Business Combination, Recognized Liability Assumed, Accounts Payable and Accrued Expenses, Current Equity Method Investment, Nonconsolidated Investee or Group of Investees Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] Derivative Contract [Domain] Derivative Contract [Domain] 2027 Unrecorded Unconditional Purchase Obligation, to be Paid, Year One Equity Method Investment, Aggregate Cost Equity Method Investment, Aggregate Cost Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Denver, CO COLORADO Change in net assets of consolidated VIE, CMBS trust Variable Interest Entity Income (loss) Variable Interest Entity Income (loss) Other financings Note-on-Note Financing [Member] Note-on-Note Financing Commercial Mortgage Loans, Held for Sale Mortgage Loans, Held for Sale, Measured at Fair Value [Text Block] Mortgage Loans, Held for Sale, Measured at Fair Value Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Number of nonperforming loans on cost recovery status Number Of Nonperforming Loans On Cost Recovery Status Number Of Nonperforming Loans On Cost Recovery Status Realized gain/(loss) on real estate securities, available for sale Debt Securities, Available-for-Sale, Realized Gain (Loss) Total liabilities, redeemable convertible preferred stock and equity Liabilities and Equity Variable lease cost Variable Lease, Cost Employee Stock Option Share-Based Payment Arrangement, Option [Member] Originations Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Number of note-on-note financings Number of Financing Agreements Number of Financing Agreements Non-controlling interest Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Asset Class [Axis] Asset Class [Axis] Related Party [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Allowance for loss sharing Business Combination, Recognized Liability Assumed, Allowance for Loss Sharing Business Combination, Recognized Liability Assumed, Allowance for Loss Sharing 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three 2026 (July-December) 2026 (July - December) Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Property, Plant and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Period of loans held-for-sale sold Period of Loans Held-for-Sale Sold Period of Loans Held-for-Sale Sold Financing Receivable Portfolio Segment [Axis] Financing Receivable Portfolio Segment [Axis] Less: Preferred stock dividends Less: Preferred stock dividends Preferred Stock Dividends and Other Adjustments Preferred stock, $0.01 par value; 100,000,000 shares authorized, 7.5% Cumulative Redeemable Preferred Stock, Series E, 10,329,039 shares issued and outstanding as of June 30, 2026 and December 31, 2025 Perpetual preferred stock Preferred Stock, Value, Issued UPB Loan, Held-in-Portfolio, Principal Outstanding Adjustment to Compensation: Adjustment to Compensation [Axis] Reclassification adjustment for amounts included in net income/(loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Credit Concentration Risk Credit Concentration Risk [Member] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash payments for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Less: Participating securities' share in earnings Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Other expenses Other related party expenses Other General Expense Credit Facility [Axis] Credit Facility [Axis] Total assets, at fair value Total assets, at fair value Assets, Fair Value Disclosure Schedule of Repurchase Agreements Schedule of Repurchase Agreements [Table Text Block] Name Measure Name MSR impairment and amortization Impairment And Amortization Of Mortgage Servicing Rights MSR Impairment And Amortization Of Mortgage Servicing Rights MSR Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Total redeemable convertible preferred stock Redeemable convertible preferred stock Convertible Preferred Stock, Nonredeemable or Redeemable, Issuer Option, Value Additional Paid-In Capital Additional Paid-in Capital [Member] Intangible Asset, Indefinite-Lived, Class [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] MRAs Master Repurchase Agreement [Member] Master Repurchase Agreement Accrued interest receivable Accrued interest receivable Interest Receivable Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation, Depletion and Amortization Discount rate Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Transfer of commercial mortgage loans, held for sale to consolidated VIE CMBS trust Commercial Mortgage Loans Transferred TO VIE CMBS Trust, Held-for-Sale Commercial Mortgage Loans Transferred TO VIE CMBS Trust, Held-for-Sale Repurchase agreements, gross amounts of recognized liabilities Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, before Offset Share-based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Accounts and Financing Receivables [Table] Real Estate [Abstract] Real Estate [Abstract] Weighted-average remaining lease term (in year) Operating Lease, Weighted Average Remaining Lease Term Loss Sharing Obligations, Allowance, Specific Reserve Loss Sharing Obligations, Allowance, Specific Reserve Loss Sharing Obligations, Allowance, Specific Reserve Non-PEO NEO Non-PEO NEO [Member] Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Unfunded Commitments Under Commercial Mortgage Loans Loan Origination Commitments [Member] Net change in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forecast Forecast [Member] Schedule of Real Estate Owned, Held For Sale Real Estate Owned, Held For Sale [Table Text Block] Real Estate Owned, Held For Sale Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Maximum allowable share conversions per month (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities, Maximum Allowed Share Conversions Per Month Stock Issued During Period, Shares, Conversion of Convertible Securities, Maximum Allowed Share Conversions Per Month Accumulated Depreciation Real Estate Owned, Accumulated Depreciation New England New England [Member] New England CML, HFS, measured at fair value - Agency GSE [Member] GSE Mixed Use Mixed Use [Member] Mixed Use [Member] Mortgage Servicing Rights Servicing Revenue Transfers and Servicing of Financial Assets [Text Block] General Reserve General Reserve [Member] General Reserve 2028 Lessor, Operating Lease, Payment to be Received, Year Two Net income/(loss) attributable to Franklin BSP Realty Trust, Inc. Net income/(loss) attributable to Franklin BSP Realty Trust, Inc. Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Financing Receivable, Past Due [Table] Financing Receivable, Past Due [Table] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Changes in Accumulated Other Comprehensive Income/(Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Charge offs from specific allowance for credit losses Mortgage Loans On Real Estate, Charge-Off Mortgage Loans On Real Estate, Charge-Off Southeast Southeast [Member] Southeast Gardena JV Gardena JV [Member] Gardena JV NewPoint Holdings JV LLC NewPoint Holdings JV LLC [Member] NewPoint Holdings JV LLC MSR payoffs Pay Offs Mortgage Servicing Rights MSRs Pay Offs Mortgage Servicing Rights MSRs Amortized cost, beginning of period Amortized cost, end of period Mortgage Loans on Real Estate, Commercial and Consumer, Net Income Revenues [Abstract] Treasury notes US Treasury Notes Securities [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] JPM Repo Facility JPM Repo Facility [Member] JPM Repo Facility [Member] Weighted Avg. Life (in Years) Intangible Asset, Finite-Lived, Remaining Amortization Period Intangible Asset and Goodwill Intangible Asset and Goodwill [Table Text Block] New Jersey NEW JERSEY Principal charge-off Mortgage Loans On Real Estate, Charge-offs Mortgage Loans On Real Estate, Charge-offs Statistical Measurement [Domain] Statistical Measurement [Domain] 2030 and beyond Unrecorded Unconditional Purchase Obligation, to be Paid, after Year Four and After Year Four Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four and After Year Four Document Fiscal Year Focus Document Fiscal Year Focus NORTH CAROLINA NORTH CAROLINA Derivative instruments, at fair value, gross amounts offset on the balance sheet Derivative Liability, Subject to Master Netting Arrangement, Asset Offset Acquisition expenses Business Combination, Acquisition-Related Cost, Expense VIE assets, measured at fair value VIE Assets, Measured At Fair Value [Member] VIE Assets, Measured At Fair Value Common stock, $0.01 par value, 900,000,000 shares authorized, 75,436,265 and 81,553,982 shares issued and outstanding as of June 30, 2026 and December 31, 2025, respectively Common stock value Common Stock, Value, Issued Interest Expense Interest Expense, Operating and Nonoperating 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Shares cancelled for tax withholding on vested equity rewards Payment, Tax Withholding, Share-Based Payment Arrangement Barclays Capital Inc. Barclays Capital Inc [Member] Barclays Capital Inc [Member] Schedule of Collateralized Loan Obligations by Tranche Schedule of Long-Term Debt Instruments [Table Text Block] Number of Bonds Debt Securities, Available-for-Sale, Number of Bonds Debt Securities, Available-for-Sale, Number of Bonds Mortgage servicing rights, net Business Combination, Recognized Asset Acquired, Mortgage Servicing Rights, Net Business Combination, Recognized Asset Acquired, Mortgage Servicing Rights, Net Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Industrial Industrial Property [Member] Indefinite lived intangibles: Intangible Asset, Excluding Goodwill, Indefinite-Lived [Abstract] Amendment Flag Amendment Flag Goodwill [Line Items] Goodwill [Line Items] Mandatory conversion date, extension period Conversion of Stock, Preferred Stock Converted To Common Stock, Mandatory Conversion Date Extension Period Conversion of Stock, Preferred Stock Converted To Common Stock, Mandatory Conversion Date Extension Period Credit default swaps Credit Default Swap [Member] Acquisitions and originations SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, New Mortgage Loan New York NEW YORK 2024-FL11 Issuer Collateralized Loan Obligations Issued in 2023-FL10 [Member] Collateralized Loan Obligations Issued in 2023-FL10 Unrealized (Loss) Unrealized loss Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Schedule of Available-for-Sale Securities Debt Securities, Available-for-Sale [Table Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Origination of commercial mortgage loans, held for sale, measured at fair value Payment for Origination, Loan, Mortgage, Held-for-Sale Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Transfers into Level III Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 Entity Address, State or Province Entity Address, State or Province Licensing Agreements Licensing Agreements [Member] Non-performing loan amortized cost at beginning of year, January 1 Non-performing loan amortized cost end of period Financing Receivable, Excluding Accrued Interest, Nonaccrual PEO Total Compensation Amount PEO Total Compensation Amount U.S. Bank National Association U.S. Bank National Association [Member] U.S. Bank National Association and U.S. Bank National Association [Member] Weighted Average Interest Rate Debt Securities, Available-for-Sale, Weighted Average Interest Rate Debt Securities, Available-for-Sale, Weighted Average Interest Rate Notional Derivative, Notional Amount Share Repurchase Program [Domain] Share Repurchase Program [Domain] Basic weighted average shares outstanding (in shares) Weighted-average common shares outstanding for basic earnings per share (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of Costs Incurred From Arrangements with Advisor and Affiliates Schedule of Related Party Transactions [Table Text Block] Collateralized loan obligations Secured Debt Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Loans transferred from commercial mortgage loans, held for investment to real estate owned, held for sale Loans Transferred To Real Estate Owned, Held-for-Sale Loans Transferred To Real Estate Owned, Held-for-Sale 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Depreciation expense Real Estate Owned, Depreciation Real Estate Owned, Depreciation Financing Receivable, Credit Quality Indicator [Line Items] Financing Receivable, Credit Quality Indicator [Line Items] Unfunded Unfunded Loan Commitment [Member] Fee to Acquire and Originate Real Estate Debt Fee to Acquire and Originate Real Estate Debt [Member] Fee to Acquire and Originate Real Estate Debt [Member] Maryland MARYLAND Third Party Vendor Agreement Third Party Vendor Agreement [Member] Third Party Vendor Agreement Noncontrolling interest in joint ventures Noncontrolling Interest in Joint Ventures Accrued interest receivable Increase (Decrease) in Accrued Interest Receivable, Net Commercial Mortgage Loans, Held for Investment Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Document Information [Line Items] Document Information [Line Items] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock [Axis] Basic net income/(loss) applicable to common stockholders Basic net income/(loss) applicable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Accumulated Amortization Intangible Asset, Finite-Lived, Accumulated Amortization Repo and revolving credit facilities, commercial mortgage loans, capacity Line of Credit Facility, Maximum Borrowing Capacity Straight line rental income Straight Line Rent Sales of investment securities, held to maturity Sales Of Pledged Investment Securities Sales Of Pledged Investment Securities Commercial mortgage loans, held for investment, net of allowance for credit losses of $54,457 and $38,302 as of June 30, 2026 and December 31, 2025, respectively Total commercial mortgage loans, held for investment, net Total commercial mortgage loans, held for investment, net Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Repurchase agreements - commercial mortgage loans Business Combination, Recognized Liability Assumed, Repurchase Agreements Commercial Mortgage Loans Business Combination, Recognized Liability Assumed, Repurchase Agreements Commercial Mortgage Loans Recently Issued Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Land Land [Member] Master repurchase agreements maturity (days) Master Repurchase Agreements, Maturity Term Master Repurchase Agreements, Maturity Term Non-Controlling Interest Noncontrolling Interest [Member] Asset management and subordinated performance fee Asset management and subordinated performance fee Asset Management And Subordinated Performance Fees Asset Management And Subordinated Performance Fees Amortization of deferred financing costs Amortization of Debt Issuance Costs Intangible asset Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill Common stock issued under dividend reinvestment plan (in shares) Stock Issued During Period, Shares, Dividend Reinvestment Plan Unsecured debt, amount outstanding Outstanding principal Long-Term Debt Transaction rate (percent) Related Party Transaction, Rate Denominator Denominator [Abstract] Denominator [Abstract] Year three, originated in prior fiscal year two Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year Mortgage impairment insurance MSR impairment reversal Mortgage Servicing Rights (MSR) Impairment (Recovery) Mortgage note payable Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure Net cash (used in)/provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Weighted average risk rating of loans Weighted Average Risk Rating Of Loans Weighted Average Risk Rating of Loans Cash Collateral Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset Unrealized gain/(loss) on commercial mortgage loans, held for sale, measured at fair value Unrealized Gain (Loss) On Sale Of Mortgage Loans, Fair Value Disclosure Unrealized Gain (Loss) On Sale Of Mortgage Loans, Fair Value Disclosure Franklin BSP Realty Trust, Inc Franklin BSP Realty Trust, Inc [Member] Franklin BSP Realty Trust, Inc Redeemable Convertible Preferred Stock and Equity Transactions Equity [Text Block] Security Exchange Name Security Exchange Name Amortization/accretion of fees and other items Mortgage Loans On Real Estate, Accretion (Amortization) Of Discounts And Premiums Mortgage Loans on Real Estate, Accretion (Amortization) of Discounts and Premiums Credit Loss Status [Domain] Credit Loss Status [Domain] Forward sale commitments Forward Sale Commitments [Member] Forward Sale Commitments Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] September 2021 Mortgage Note Payable, Eliminated in Consolidation September 2021 Mortgage Note Payable, Eliminated in Consolidation [Member] September 2021 Mortgage Note Payable, Eliminated in Consolidation Real estate owned, held for sale Assets, Net Real Estate, Held-for-Sale Common stock reserved for issuance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized 2031 and beyond Lessee, Operating Lease, Liability, to be Paid, after Year Four Lessee, Operating Lease, Liability, to be Paid, after Year Four Business Combination, Pro Forma Information [Line Items] Business Combination, Pro Forma Information [Line Items] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Intangible assets, net of amortization Finance Lease, Right-of-Use Asset, after Accumulated Amortization Name Outstanding Recovery, Individual Name Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Commercial mortgage loans, held for investment Debt Security, Mortgage-Backed, Held-to-Maturity, Fair Value Disclosure Restricted cash Business Combination, Recognized Asset Acquired, Restricted Cash Business Combination, Recognized Asset Acquired, Restricted Cash Loss-sharing obligations, percent Loss-Sharing Obligations, Percent Loss-Sharing Obligations, Percent Geographical [Domain] Geographical [Domain] Indefinite-lived intangible, carrying value Intangible Asset, Excluding Goodwill, Indefinite-Lived Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Change in net assets of consolidated variable interest entity, CMBS trust Change In Net Assets Of Variable Interest Entity, CMBS Trust, Non-Cash Income Change In Net Assets Of Variable Interest Entity, CMBS Trust, Non-Cash Income 2029 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Three Origination and purchase of commercial mortgage loans, held for investment Payments to Acquire Finance Receivables Total unrealized gain (loss) OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Unrealized Gain/(Loss) Unrealized Gain (Loss) on Derivatives Noncontrolling interest, ownership percentage by parent Subsidiary, Ownership Percentage, Parent Asset Class [Domain] Asset Class [Domain] Non-compete Agreements Noncompete Agreements [Member] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Number of extension options Debt Instrument, Number Of Extension Options Debt Instrument, Number of Extension Options Individual: Individual [Axis] Equity interest acquired, percentage Business Combination, Voting Equity Interest Acquired, Percentage Payment to acquire interest in CMBS trust Payments To Acquire Interest In Variable Interest Entity, CMBS Trust Payments To Acquire Interest In Variable Interest Entity, CMBS Trust Diluted weighted average shares outstanding (in shares) Weighted-average common shares outstanding for diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Related Party Transaction [Line Items] Related Party Transaction [Line Items] Total gross carrying value of loans Amortized cost Total Amortized Cost Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Underlying Security Market Price Change Underlying Security Market Price Change, Percent Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Commercial mortgage loans, held for investment Commercial mortgage loans, held for sale CML, HFS, measured at fair value - Non-Agency Mortgage Receivable [Member] Liabilities Derivative instruments, at fair value, gross amounts recognized Derivative Liability, Subject to Master Netting Arrangement, before Offset Virginia VIRGINIA Loan commitments and forward sale commitments, net Loan Commitments And Forward Sale Commitments, Fair Value Loan Commitments And Forward Sale Commitments, Fair Value Intangible Asset, Goodwill and Other [Abstract] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Borrowings on unsecured debt Proceeds from Issuance of Unsecured Debt Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Intangible Asset, Indefinite-Lived, Class [Domain] Intangible Asset, Indefinite-Lived, Class [Domain] Total Lease Payments Lessee, Operating Lease, Liability, to be Paid Transfers and Servicing [Abstract] Changes in assets and liabilities: Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] Loans transferred from commercial mortgage loans, held for investment to real estate owned, held for investment Loans Transferred To Real Estate Owned, Held-for-Investment Loans Transferred To Real Estate Owned, Held-for-Investment All Executive Categories All Executive Categories [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Reconciliation of cash, cash equivalents and restricted cash: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Allowance for loss sharing Allowance For Loss Sharing Allowance For Loss Sharing Schedule of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Non-Performing Financial Instruments [Roll Forward] Non-Performing Financial Instruments [Roll Forward] Non-Performing Financial Instruments Segment Reporting Segment Reporting [Text Block] Minimum Minimum [Member] Equity method investment, quoted market value Equity Method Investment, Quoted Market Value Liabilities Liabilities, at fair value Liabilities [Abstract] Amortization Servicing Asset at Amortized Cost, Amortization Consolidated Variable Interest Entities Assets and Liabilities, at Fair Value Variable Interest Entity Disclosure [Text Block] Location, Statement of Income, Balance [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Total liabilities, at fair value Financial Liabilities Fair Value Disclosure Accrued interest Accrued Interest Receivable, Net, Current Accrued Interest Receivable, Net, Current Payables due to affiliate Other Liabilities Common stock distributions Dividends, Common Stock Business Combination [Line Items] Business Combination [Line Items] Real Estate Owned Real Estate Owned [Text Block] September 2021 Mortgage Note Payable, Affiliate September 2021 Mortgage Note Payable, Affiliate [Member] September 2021 Mortgage Note Payable, Affiliate Common stock, shares authorized (in shares) Common Stock, Shares Authorized Real estate investment property, net Real Estate Investment Property, Net Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Exercise Price Award Exercise Price Fair Value, Measurements, Recurring Fair Value, Recurring [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Segment Reporting [Line Items] Segment Reporting [Line Items] Share repurchase program, authorized amount Beginning of period, authorized repurchase amount Share Repurchase Program, Authorized, Amount Total purchase consideration Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill, Less Noncontrolling Interest Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Texas TEXAS Lender Name [Axis] Lender Name [Axis] Mezzanine loans Mezzanine Loans [Member] Mezzanine Loans [Member] Proceeds from sale or paydown of real estate securities Proceeds from Sale of Debt Securities, Available-for-Sale Mortgage banking activities Gain Loss On Mortgage Banking Activities Net Gain Loss On Mortgage Banking Activities Net Interest payable Accrued interest payable Interest Payable Series E Preferred Stock Series E Preferred Stock [Member] Liquidation preference and notional amount (in dollars per share) Preferred Stock, Liquidation Preference Per Share Options Options Held [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity method investments Equity Method Investments Equity Component [Domain] Equity Component [Domain] Loans eligible for repurchase Loans Receivable, Fair Value Disclosure Servicing fee income Servicing Fees Revenue Servicing Fees Revenue Real Estate Properties [Domain] Real Estate Properties [Domain] 2 Investment Rating 2 [Member] Investment Rating 2 [Member] Other income/(loss) Other Income, Nonoperating [Abstract] Adoption Date Trading Arrangement Adoption Date Counterparty Name [Domain] Counterparty Name [Domain] Mortgage servicing rights, net Beginning balance Ending balance Servicing Asset Total other income/(loss) Nonoperating Income (Expense) Operating expenses Operating Expenses, Adjusted Operating Expenses, Adjusted Benefit Street Partners Benefit Street Partners [Member] Benefit Street Partners Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Operating lease, liability Total Operating Lease, Liability Jeffersonville JV, Affiliate Jeffersonville JV, Affiliate [Member] Jeffersonville JV, Affiliate Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Commercial Portfolio Segment Commercial Portfolio Segment [Member] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Business Combination [Domain] Business Combination [Domain] Secured borrowings from CMBS Trust Proceeds from Issuance CMBS Trust Secured Borrowings Proceeds from Issuance CMBS Trust Secured Borrowings Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Rental income Operating Lease, Lease Income Financial Asset, Period Past Due [Domain] Financial Asset, Aging [Domain] Common stock - at par value Common Stock, Value, Outstanding Weighted Average Weighted Average [Member] Jeffersonville, GA Jeffersonville, Georgia [Member] Jeffersonville, Georgia All Adjustments to Compensation All Adjustments to Compensation [Member] Accrued compensation Business Combination, Recognized Liability Assumed, Accrued Compensation Business Combination, Recognized Liability Assumed, Accrued Compensation Business Combination [Axis] Business Combination [Axis] Net cash (used in)/provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Impairment reversal Servicing Asset at Amortized Cost, Impairment Reversal Servicing Asset at Amortized Cost, Impairment Reversal Deferred financing cost and discount Debt Issuance Costs And Discount Debt Issuance Costs and Discount Collateralized loan obligation excluded Secured Debt Excluded Secured Debt Excluded Aggregate principal balance Payments to Acquire Notes Receivable Pledging Purpose [Domain] Pledging Purpose [Domain] Income Statement [Abstract] Income Statement [Abstract] Purchases of investment securities, held to maturity Purchases Of Pledged Investment Securities Purchases Of Pledged Investment Securities Document Transition Report Document Transition Report Banking Regulation, Mortgage Banking, Capital Requirement [Table] Banking Regulation, Mortgage Banking, Capital Requirement [Table] Freddie Mac Freddie Mac [Member] Freddie Mac Gain/(loss) on other real estate investments Gain (Loss) on Investments Furniture, Fixtures and Equipment Furniture Fixtures and Equipment [Member] Furniture Fixtures and Equipment [Member] At The Market Sales Agreement At The Market Sales Agreement [Member] At The Market Sales Agreement Expenses Operating Expenses [Abstract] Walgreens JV, Affiliate Walgreens JV, Affiliate [Member] Walgreens JV, Affiliate Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] City Area Code City Area Code Collateralized Loan Obligations Issued in 2025-FL12 Collateralized Loan Obligations Issued in 2025-FL12 [Member] Collateralized Loan Obligations Issued in 2025-FL12 Geographic Concentration Risk Geographic Concentration Risk [Member] Document Information [Table] Document Information [Table] Subsequent Events Subsequent Events [Text Block] Exit capitalization rate Exit Capitalization Rate Exit Capitalization Rate Unsecured debt Debt Instrument, Fair Value Disclosure Name Forgone Recovery, Individual Name Loss Contingency Accrual [Roll Forward] Loss Contingency Accrual [Roll Forward] Barclays Revolver Facility Barclays Revolver Facility [Member] Barclays Facility [Member] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Zelda PG JV HoldCo LLC Zelda PG JV HoldCo LLC [Member] Zelda PG JV HoldCo LLC Entity [Domain] Entity [Domain] Forward sale commitments Loan commitments [Member] Loan commitments Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued 1 Investment Rating 1 [Member] Investment Rating 1 [Member] Redeemable convertible preferred stock: Features of Convertible Preferred Stock [Abstract] Interest income Interest and Dividend Income, Operating Financing Receivable, Credit Quality Indicator [Table] Financing Receivable, Credit Quality Indicator [Table] CMBS bonds issued via consolidated VIE CMBS trust CMBS Bonds Issued, VIE CMBS Trust CMBS Bonds Issued, VIE CMBS Trust Commercial mortgage loans, held for sale, measured at fair value Fair Value Commercial mortgage loans, held for sale, measured at fair value - Non-Agency Loan, Mortgage, Held-for-Sale, Fair Value Disclosure Assets and liabilities measured at fair value, net Fair Value, Net Asset (Liability) CMBS Bonds Commercial Real Estate Collateralized Loan Obligations [Member] Commercial Real Estate Collateralized Loan Obligations Churchill Repo Facility Churchill Repo Facility [Member] Churchill Repo Facility Bridge Bridge [Member] Bridge Issuance of stock (in shares) Stock Issued During Period, Shares, New Issues MSR amortization Amortization of Mortgage Servicing Rights (MSRs) Transfer to held for sale Mortgage Loans On Real Estate, Transfer To Held For Sale Mortgage Loans On Real Estate, Transfer To Held For Sale VIE assets, measured at fair value(1) CML, at fair value Commercial Mortgage Loans, At Fair Value [Member] Commercial Mortgage Loans, At Fair Value Number of positions in unrealized loss position 12 months or longer Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Share-based compensation Share-Based Payment Arrangement, Expense Gross Amounts Offset on the Balance Sheet Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Measurement Basis [Axis] Measurement Basis [Axis] Location, Statement of Financial Position, Activity, Capitalization [Axis] Location, Statement of Financial Position, Activity, Capitalization [Axis] 3 Investment Rating 3 [Member] Investment Rating 3 [Member] Product Information [Line Items] Product Information [Line Items] Goodwill acquired during the period Goodwill, Acquired During Period Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Huntersville, NC Huntersville, North Carolina [Member] Huntersville, North Carolina Accumulated Other Comprehensive Income/(Loss) for Real Estate Securities, Available for Sale, Measured at Fair Value AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Cash and cash equivalents Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Schedule of Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Change in net unrealized gain/(loss) OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash (used in)/provided by financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Shares canceled for tax withholding on vested equity rewards Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Payments to acquire property Payments to Acquire Real Estate Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Outstanding principal balance Loan, Held-In-Portfolio, Outstanding Amount Loan, Held-In-Portfolio, Outstanding Amount Schedule of Business Combination, Pro Forma Information Business Combination, Pro Forma Information [Table Text Block] Adjustments to reconcile net income to net cash (used in)/provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] BAML WH Line of Credit BAML WH Line of Credit [Member] BAML WH Line of Credit Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Net borrowings/(paydowns) on repurchase agreements - real estate securities, less than 90 days maturity Proceeds From (Repayment Of) Real Estate Security Repurchase Agreements Proceeds from Real Estate Security Repurchase Agreements VIE liabilities, measured at fair value VIE Liabilities, Measured At Fair Value [Member] VIE Liabilities, Measured At Fair Value Financial Instruments [Domain] Financial Instruments [Domain] Year five, original in prior fiscal year four Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year Derivative instruments, measured at fair value Derivative Asset Intangible Asset, Finite-Lived, Class [Axis] Intangible Asset, Finite-Lived, Class [Axis] Offsetting [Abstract] Offsetting [Abstract] Goodwill & Other Intangible Assets Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Comprehensive (income)/loss attributed to non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Fair Value Estimate of Fair Value Measurement [Member] Addition of non-performing loan amortized cost Financing Receivable, Excluding Accrued Interest, Nonaccrual, Additions Of Carrying Value Financing Receivable, Excluding Accrued Interest, Nonaccrual, Additions Of Carrying Value Preferred E Preferred Stock Preferred Stock [Member] Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Segment Reporting [Table] Segment Reporting [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Agency License Intangibles Agency License Intangibles [Member] Agency License Intangibles Revenue Business Combination, Acquiree's Revenue since Acquisition Date, Actual Schedule of Lease, Cost Lease, Cost [Table Text Block] Debt assumption on repurchases agreements Debt Assumption On Repurchases Agreements Debt Assumption On Repurchases Agreements Unit to common stock conversion ratio Partnership Unit To Common Stock Conversion Ratio Partnership Unit To Common Stock Conversion Ratio Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Fair value of securities in an unrealized loss position, less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Fiscal Year End Date Current Fiscal Year End Date Commercial mortgage-backed securities, at fair value Loan, Mortgage Obligations, Fair Value Disclosure Loan, Mortgage Obligations, Fair Value Disclosure Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount (Provision)/benefit for credit losses Provision/(benefit) for credit losses (Provision)/benefit for credit losses Provision/(Benefit) Financing Receivable, Excluding Accrued Interest, Credit Loss Expense (Reversal) Derivative [Line Items] Derivative [Line Items] Servicing Asset [Roll Forward] Servicing Asset at Amortized Cost, Balance [Roll Forward] Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral Common stock repurchases (in shares) Common stock shares repurchased (in shares) Stock Repurchased During Period, Shares Total Unrecorded Unconditional Purchase Obligation Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Common stock dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity File Number Entity File Number Office Office Building [Member] Advance rate of mortgage loan (percent) Long-Term Line Of Credit, Advance Rate Of Mortgage Loan, Percent Long-Term Line Of Credit, Advance Rate Of Mortgage Loan, Percent Servicing revenue, net Contractually Specified Servicing Fees, Amount Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Referral Fee Income Referral Fee Income [Member] Referral Fee Income Preferred stock dividends declared (in dollars per share) Preferred Stock, Dividends Per Share, Declared Measure: Measure [Axis] Equity Method Investments Equity Method Investments and Joint Ventures Disclosure [Text Block] Benefit Street Partners LLC Benefit Street Partners LLC [Member] Benefit Street Partners LLC [Member] Schedule of Collateralized Loan Obligations Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Derivative liabilites Derivative liabilites [Member] Derivative liabilites Non-Agency loans Non US Government Sponsored-Enterprise Insured Loans [Member] Non US Government Sponsored-Enterprise Insured Loans Present value, discount rate, percentage Present Value, Discount Rate, Percentage Present Value, Discount Rate, Percentage Real Estate Debt and Other Real Estate Investments Real Estate Debt [Member] Real Estate Debt [Member] Equity Components [Axis] Equity Components [Axis] Junior Note II Junior Subordinated Note II, Maturing December 2035 [Member] Junior Subordinated Note II, Maturing December 2035 Related Party Related Party [Member] 5 Investment Rating 5 [Member] Investment Rating 5 [Member] Entity Interactive Data Current Entity Interactive Data Current Variable Rate [Axis] Variable Rate [Axis] Net (income)/loss attributable to non-controlling interest Net income/(loss) attributable to non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Share-based compensation Shares Granted, Value, Share-Based Payment Arrangement, after Forfeiture, Net Shares Granted, Value, Share-Based Payment Arrangement, after Forfeiture, Net Reclassification adjustment for amounts included in net income/(loss) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Entity Small Business Entity Small Business Comprehensive income/(loss) attributable to Franklin BSP Realty Trust, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Foreclosed Property Construction In Progress Foreclosed Property Construction In Progress [Member] Foreclosed Property Construction In Progress Shares canceled for tax withholding on vested equity rewards (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Weighted average useful economic useful life Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period Net interest income Interest Income (Expense), Operating MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other Other [Member] Other Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Realized gain/(loss) on extinguishment of debt Realized gain/(loss) on extinguishment of debt Gain (Loss) on Extinguishment of Debt Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Real Estate Owned, net Real Estate Owned, Held For Investment, Net Real Estate Owned, Held For Investment, Net 2025-FL12 Issuer Collateralized Loan Obligations Issued in 2024-FL11 Issuer [Member] Collateralized Loan Obligations Issued in 2024-FL11 Issuer Subsequent Event [Line Items] Subsequent Event [Line Items] Number of loans Number of Loans Number Of Loans Number of Mezzanine Loans Funded Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Pledged Status [Domain] Pledged Status [Domain] Ginnie Mae Ginne Mae [Member] Ginne Mae Commitments and Contingencies Commitments and Contingencies Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Amounts related to available for sale real estate securities: OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax [Abstract] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 2030 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Executive Category: Executive Category [Axis] Counterparty Name [Axis] Counterparty Name [Axis] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] 2030 Lessor, Operating Lease, Payment to be Received, Year Four Modification accounted for as repayment and new loan Modification Accounted For As Repayment And New Loan Modification Accounted For As Repayment And New Loan JPM WH Line of Credit JPM WH Line of Credit [Member] JPM WH Line of Credit Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Gain/(loss) on sales, including fee-based services, net Gain (Loss) on Sales of Loans, Net Schedule of Variable Interest Entities [Table] Variable Interest Entity [Table] Monthly asset management fee (percent) Related Party Transaction Monthly Asset Management Fee, Percent Of Stockholders' Equity Related Party Transaction Monthly Asset Management Fee, Percent of Stockholders' Equity Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities PEO Name PEO Name VIE liabilities, measured at fair value Variable Interest Entity Liabilities Variable Interest Entity Liabilities Walgreens JV Walgreens JV [Member] Walgreens JV Cash payments for income taxes Income Tax Paid, before Refund Received Other segment items Segment Reporting, Other Segment Item, Amount Property, Plant and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Repayments of collateralized loan obligations Repayments of Secured Debt Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Schedule of Past Due Loans Financing Receivable, Past Due [Table Text Block] Current Financial Asset, Not Past Due [Member] Prepaid expenses and other assets Prepaid Expense and Other Assets Mortgage note payable Par Value Notes payable Notes Payable Borrowings on repurchase agreements and revolving credit facilities - commercial mortgage loans Proceeds From Securities Purchased Under Agreements To Resell, Loans Receivable Proceeds from Securities Purchased under Agreements to Resell, Loans Receivable Credit Loss Status [Axis] Credit Loss Status [Axis] Hospitality Hospitality [Member] Hospitality Specific allowance for credit losses Specific (provision)/benefit for credit losses Specific Allowance for Credit Losses Allowance for Credit Loss, Specific [Member] Allowance for Credit Loss, Specific Product Concentration Risk Product Concentration Risk [Member] Collateral Pledged Debt Securities Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Wells Fargo Securities, LLC Wells Fargo Securities LLC [Member] Wells Fargo Securities LLC [Member] Santander Securities Santander Securities [Member] Santander Securities Organization and Business Operations Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Measurement Frequency [Domain] Measurement Frequency [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Specific Reserve Specific Reserve [Member] Specific Reserve Other liabilities Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Share-based compensation Share-Based Payment Arrangement, Noncash Expense Compensation and benefits Compensation and benefits Labor and Related Expense Net lease cost Lease, Cost Fees per the fee arrangement Fees Per The Fee Arrangement Fees Per The Fee Arrangement DRIP Dividend Reinvestment And Direct Stock Purchase Plan (DRIP) [Member] Dividend Reinvestment And Direct Stock Purchase Plan (DRIP) Due to affiliates Increase (Decrease) in Due to Affiliates Variable interest entity (“VIE”) assets, measured at fair value Variable Interest Entity Assets Variable Interest Entity Assets Repurchase agreements, net amount Security Sold under Agreement to Repurchase, Including Not Subject to Master Netting Arrangement, after Offset and Deduction Basic earnings per share (in dollars per share) Earnings Per Share, Basic Agency loans US Government Sponsored-Enterprise Insured Loans [Member] Insider Trading Arrangements [Line Items] Great Lakes Great Lakes [Member] Great Lakes Class A Units Class A Units [Member] Class A Units Payments of deferred financing costs Payments of Financing Costs Total stockholders' equity Net Assets, Equity, Attributable to Parent Net Assets, Equity, Attributable to Parent Schedule of Repurchases Class of Treasury Stock [Table Text Block] General allowance for credit losses General (provision)/benefit for credit losses General Allowance for Credit Losses Allowance for Credit Loss, General [Member] Allowance for Credit Loss, General Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Intangible lease assets Intangible Lease Assets [Member] Intangible Lease Assets Percentage % of Portfolio Concentration Risk, Percentage Equity Awards Adjustments Equity Awards Adjustments [Member] Schedule of Unfunded Commitments Under Commercial Mortgage Loans, Held for Investment Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Fund Defined Benefit Plan, Funded (Unfunded) Status of Plan Fifth Third Line of Credit Fifth Third Line of Credit [Member] Fifth Third Line of Credit Administrative services expenses Administrative Services Expenses [Member] Administrative Services Expenses Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Schedule of Future Minimum Payments to be Received Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] Other liabilities Increase (Decrease) in Other Operating Liabilities Schedule of Loans Receivable by Class Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Provision/(benefit) for loss sharing Loss Contingency Accrual, Loss (Reversal of Loss) Finite lived intangibles: Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] Other financings Other Long-Term Debt Mortgage bankers bond Repayments of First Mortgage Bond Number of positions with net unrealized gain (loss) period less than 12 months Debt Securities, Available-for-Sale, Net Unrealized Gain (Loss) Position, Number of Positions Debt Securities, Available-for-Sale, Net Unrealized Gain (Loss) Position, Number of Positions Total Stockholders' Equity Parent [Member] Weighted Average Contractual Maturity (years) Debt Securities, Available-for-Sale, Weighted Average Contractual Maturity Debt Securities, Available-for-Sale, Weighted Average Contractual Maturity OP unit (in shares) Partners' Capital Account, Units, Redeemed BSPRT 2022-FL8 Notes BSPRT 2022-FL8 Notes [Member] BSPRT 2022-FL8 Notes Administrative services expenses Administrative services expenses General and Administrative Expense Offsetting Assets and Liabilities Offsetting Assets And Liabilities [Text Block] Offsetting Assets and Liabilities [Text Block] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized ASAP WH Line of Credit ASAP WH Line of Credit [Member] ASAP WH Line of Credit Number of real estate properties Number of Real Estate Properties Repurchase agreements - commercial mortgage loans Repurchase agreements, commercial mortgage loans Commercial Mortgage-Backed Securities [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Common stock purchased through distribution reinvestment plan (in shares) Stock Purchased During Period, Shares, Dividend Reinvestment Plan Stock Purchased During Period, Shares, Dividend Reinvestment Plan Class of Stock [Domain] Class of Stock [Domain] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Real estate investments, joint ventures Real Estate Investments, Joint Ventures Schedule of Shares Outstanding Schedule of Stock by Class [Table Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Revenue, Product and Service Benchmark Revenue, Product and Service Benchmark [Member] Real estate owned, net of depreciation Real Estate Acquired Through Foreclosure Petroleum Reserves [Axis] Petroleum Reserves [Axis] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Repo Facility Repurchase Facility [Member] Repurchase Facility Total Purchase Price Purchase price Business Combination, Consideration Transferred Entity Filer Category Entity Filer Category Supplemental disclosures of cash flow information: Supplemental Cash Flow Elements [Abstract] Payment of software development costs Payments to Develop Software Schedule of Offsetting Liabilities Offsetting Liabilities [Table Text Block] Realized (gain)/loss on sale of available for sale securities, measured at fair value Debt Securities, Available-for-Sale, Trading, Gain (Loss) Debt Securities, Available-for-Sale, Trading, Gain (Loss) Realized Gain/(Loss) Gain (Loss) on Derivative Instruments, Net, Pretax Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Financial Asset, Period Past Due [Axis] Financial Asset, Aging [Axis] Distributions from equity method investments Proceeds from Equity Method Investment, Distribution Equity Method Investments and Joint Ventures [Abstract] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Commercial mortgage loans acquired via consolidated VIE CMBS trust Commercial Mortgage loans Acquired, VIE CMBS Trust Commercial Mortgage loans Acquired, VIE CMBS Trust Loan commitments Loan Purchase Commitments [Member] Repurchase agreements, gross amounts offset on the balance sheet Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Asset Offset Entity Address, Address Line Two Entity Address, Address Line Two Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Net income/(loss) Net income/(loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Barclays Repo Facility Barclays Repo Facility [Member] Barclays Repo Facility [Member] Revenue Business Combination, Pro Forma Information, Pro Forma Revenue Derivative instruments, measured at fair value Treasury notes Credit default swaps Derivative Liability Entity Address, Address Line One Entity Address, Address Line One (Provision)/benefit for income tax Income Tax Expense (Benefit) Series H Preferred Stock Series H Preferred Stock [Member] Transfer to real estate owned Mortgage Loans On Real Estate, Transfer On Foreclosure Mortgage Loans on Real Estate, Transfer on Foreclosure Commercial mortgage loans, held for sale, measured at fair value Commercial Mortgage Loans Contributed To Variable Interest Entity Commercial Mortgage Loans Contributed To Variable Interest Entity Principles of Consolidation Consolidation, Policy [Policy Text Block] Commercial Mortgage Receivable, Held-For-Investment Commercial Mortgage Receivable, Held-For-Investment [Member] Commercial Mortgage Receivable, Held-For-Investment [Member] Contributions/(distributions) in non-controlling interest, net Noncontrolling Interest, Net Increase (Decrease) Noncontrolling Interest, Net Increase (Decrease) Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Principal repayments received on commercial mortgage loans, held for investment Proceeds from Collection of Loans Receivable Statement [Table] Statement [Table] Year two, originated in prior fiscal year one Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year Schedule of Loans on Nonaccrual Status Financing Receivable, Nonaccrual [Table Text Block] Assets Gross Amounts of Recognized Assets Derivative Asset, Subject to Master Netting Arrangement, before Offset Loss sharing obligations, allowance Loss Sharing Obligations, Allowance Loss Sharing Obligations, Allowance 2026 Unrecorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year Liabilities, Net Real Estate Liabilities Associated with Assets Held for Development and Sale Initial maturity period Long-Term Debt, Term Prepaid expenses and other assets Business Combination, Recognized Asset Acquired, Prepaid Expense and Other Asset, Current Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract]