Organization and Business Operations	3 Months Ended
Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Business Operations	Note 1 - Organization and Business Operations Franklin BSP Realty Trust, Inc., (the "Company") is a Maryland corporation that operates as a real estate finance company. The Company has elected to be taxed as a real estate investment trust (a “REIT”) for U.S. federal income tax purposes since 2013. The Company’s operations are organized into two business units: (i) Commercial Real Estate Financing, and (ii) Agency Business. Commercial Real Estate Financing The Commercial Real Estate Financing unit primarily focuses on originating, acquiring and asset managing commercial real estate debt investments, including first mortgage loans, subordinated mortgage loans, mezzanine loans and participations in such loans. Secondarily, this unit also invests in and asset manages real estate securities, with a historical focus on commercial mortgage-backed securities ("CMBS"), commercial real estate collateralized loan obligation bonds and single asset single borrower bonds (collectively "CMBS bonds"), collateralized debt obligations ("CDOs") and other securities. Through this unit the Company also originates conduit loans which the Company intends to sell through its taxable REIT subsidiary ("TRS") into CMBS securitization transactions, and owns real estate that was either acquired by the Company through foreclosure, deed-in-lieu of foreclosure or that was purchased for investment. Agency Business On July 1, 2025, through a wholly owned subsidiary, we acquired NewPoint Holdings JV LLC ("NewPoint"), which now comprises our Agency Business unit. Through this unit, we originate, sell and service a range of multifamily finance products under programs offered by government-sponsored enterprises (“GSEs”), such as the Federal National Mortgage Association (“Fannie Mae”) and Federal Home Loan Mortgage Corporation (“Freddie Mac”) and by government agencies (“Agencies”), such as the Government National Mortgage Association (“Ginnie Mae”) and the Federal Housing Administration, a division of the U.S. Department of Housing and Urban Development (together with Ginnie Mae, “HUD”). We retain the servicing rights and asset management responsibilities on substantially all loans we originate and sell under the GSE and HUD programs. We are an approved Fannie Mae Delegated Underwriting and Servicing (“DUS”) lender, a Freddie Mac Program Plus Seller/Servicer, a Multifamily Accelerated Processing (“MAP”) and Section 232 LEAN lender for HUD and a Ginnie Mae issuer. Additionally, the Company services external portfolios of commercial real estate financing products. Structure The Company believes that it has qualified as a REIT and intends to continue to meet the requirements for qualification and taxation as a REIT. As of March 31, 2026, substantially all of the Company's business is conducted through FBRT OP LLC (the “OP”), a Delaware limited liability company. As of March 31, 2026, the Company is the managing member of the OP and directly or indirectly holds 90% of the common units of membership interest in the OP. In addition, the Company, through subsidiaries which are treated as taxable REIT subsidiaries (“TRS”), is indirectly subject to U.S. federal, state and local income taxes. The Company is externally-managed by Benefit Street Partners L.L.C. (the "Advisor") pursuant to an advisory agreement, as amended on August 18, 2021 (the "Advisory Agreement"). Established in 2008, the Advisor's credit platform manages funds for institutions and high-net-worth investors across various credit funds and complementary strategies including high yield, levered loans, private/opportunistic debt, liquid credit, structured credit and commercial real estate debt. These strategies complement each other as they all leverage the sourcing, analytical, compliance, and operational capabilities that encompass the platform. The Advisor manages the Company's affairs on a day-to-day basis. The Advisor receives compensation fees and reimbursements for services related to the investment and management of the Company's assets and the operations of the Company. The Advisor is a wholly-owned subsidiary of Franklin Resources, Inc., which together with its various subsidiaries operates as "Franklin Templeton.”

Franklin BSP Realty Trust, Inc., (the "Company") is a Maryland corporation that operates as a real estate finance company. The Company has elected to be taxed as a real estate investment trust (a “REIT”) for U.S. federal income tax purposes since 2013. The Company’s operations are organized into two business units: (i) Commercial Real Estate Financing, and (ii) Agency Business.

The Commercial Real Estate Financing unit primarily focuses on originating, acquiring and asset managing commercial real estate debt investments, including first mortgage loans, subordinated mortgage loans, mezzanine loans and participations in such loans. Secondarily, this unit also invests in and asset manages real estate securities, with a historical focus on commercial mortgage-backed securities ("CMBS"), commercial real estate collateralized loan obligation bonds and single asset single borrower bonds (collectively "CMBS bonds"), collateralized debt obligations ("CDOs") and other securities. Through this unit the Company also originates conduit loans which the Company intends to sell through its taxable REIT subsidiary ("TRS") into CMBS securitization transactions, and owns real estate that was either acquired by the Company through foreclosure, deed-in-lieu of foreclosure or that was purchased for investment.

On July 1, 2025, through a wholly owned subsidiary, we acquired NewPoint Holdings JV LLC ("NewPoint"), which now comprises our Agency Business unit. Through this unit, we originate, sell and service a range of multifamily finance products under programs offered by government-sponsored enterprises (“GSEs”), such as the Federal National Mortgage Association (“Fannie Mae”) and Federal Home Loan Mortgage Corporation (“Freddie Mac”) and by government agencies (“Agencies”), such as the Government National Mortgage Association (“Ginnie Mae”) and the Federal Housing Administration, a division of the U.S. Department of Housing and Urban Development (together with Ginnie Mae, “HUD”). We retain the servicing rights and asset management responsibilities on substantially all loans we originate and sell under the GSE and HUD programs. We are an approved Fannie Mae Delegated Underwriting and Servicing (“DUS”) lender, a Freddie Mac Program Plus Seller/Servicer, a Multifamily Accelerated Processing (“MAP”) and Section 232 LEAN lender for HUD and a Ginnie Mae issuer. Additionally, the Company services external portfolios of commercial real estate financing products.

The Company believes that it has qualified as a REIT and intends to continue to meet the requirements for qualification and taxation as a REIT. As of March 31, 2026, substantially all of the Company's business is conducted through FBRT OP LLC (the “OP”), a Delaware limited liability company. As of March 31, 2026, the Company is the managing member of the OP and directly or indirectly holds 90% of the common units of membership interest in the OP. In addition, the Company, through subsidiaries which are treated as taxable REIT subsidiaries (“TRS”), is indirectly subject to U.S. federal, state and local income taxes.

The Company is externally-managed by Benefit Street Partners L.L.C. (the "Advisor") pursuant to an advisory agreement, as amended on August 18, 2021 (the "Advisory Agreement"). Established in 2008, the Advisor's credit platform manages funds for institutions and high-net-worth investors across various credit funds and complementary strategies including high yield, levered loans, private/opportunistic debt, liquid credit, structured credit and commercial real estate debt. These strategies complement each other as they all leverage the sourcing, analytical, compliance, and operational capabilities that encompass the platform. The Advisor manages the Company's affairs on a day-to-day basis. The Advisor receives compensation fees and reimbursements for services related to the investment and management of the Company's assets and the operations of the Company. The Advisor is a wholly-owned subsidiary of Franklin Resources, Inc., which together with its various subsidiaries operates as "Franklin Templeton.”