v3.26.1
Cover
Apr. 29, 2026
Feb. 11, 2026
Cover [Abstract]    
Document Type 8-K  
Registrant Name Franklin BSP Realty Trust, Inc.  
Entity Address, Address Line One 1 Madison Ave  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
City Area Code 212  
Local Phone Number 588-6770  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Document Information [Line Items]    
Entity Tax Identification Number 46-1406086  
City Area Code 212  
Entity Information [Line Items]    
Entity Emerging Growth Company   false
Central Index Key 0001562528  
Amendment Flag false  
Entity Incorporation, State or Country Code MD  
Entity File Number 001-40923  
Document Period End Date Apr. 29, 2026  
Entity Address, Postal Zip Code 10010  
Common Stock    
Cover [Abstract]    
Title of 12(b) Security Common Stock, par value $0.01 per share  
Security Exchange Name NYSE  
Document Information [Line Items]    
Security Exchange Name NYSE  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol FBRT  
Entity Information [Line Items]    
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol FBRT  
Trading Symbol FBRT  
Series E Preferred Stock    
Cover [Abstract]    
Title of 12(b) Security 7.50% Series E Cumulative Redeemable Preferred Stock, par value $0.01 per share  
Security Exchange Name NYSE  
Document Information [Line Items]    
Security Exchange Name NYSE  
Title of 12(b) Security 7.50% Series E Cumulative Redeemable Preferred Stock, par value $0.01 per share  
Trading Symbol FBRT PRE  
Entity Information [Line Items]    
Title of 12(b) Security 7.50% Series E Cumulative Redeemable Preferred Stock, par value $0.01 per share  
Trading Symbol FBRT PRE  
Trading Symbol FBRT PRE