v3.26.1
Related Party Transactions and Arrangements - Narrative (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 18, 2026
USD ($)
Jun. 30, 2026
USD ($)
Mar. 31, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Apr. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
property
Nov. 30, 2022
property
Jun. 30, 2022
USD ($)
property
Sep. 30, 2021
USD ($)
Sep. 17, 2021
USD ($)
Related Party Transaction [Line Items]                        
Equity method investments   $ 89,186     $ 89,186     $ 71,682        
Total commercial mortgage loans, held for investment, net [1]   4,275,122     4,275,122     4,383,134        
Interest income   97,187   $ 111,171 189,436 $ 225,079            
Commercial Mortgage Receivable, Held-For-Investment                        
Related Party Transaction [Line Items]                        
Total commercial mortgage loans, held for investment, net   4,275,122     4,275,122     4,383,134        
Commercial Mortgage Receivable, Held-For-Investment | Commercial Portfolio Segment                        
Related Party Transaction [Line Items]                        
Total commercial mortgage loans, held for investment, net   4,275,122     4,275,122     $ 4,383,134        
Industrial | Jeffersonville, GA | Mortgages                        
Related Party Transaction [Line Items]                        
Principal amount                       $ 113,600
Industrial | Jeffersonville, GA | Franklin BSP Realty Trust, Inc | Mortgages | September 2021 Mortgage Note Payable, Eliminated in Consolidation                        
Related Party Transaction [Line Items]                        
Principal amount                       $ 89,400
Industrial | Jeffersonville, GA | Jeffersonville JV, Affiliate                        
Related Party Transaction [Line Items]                        
Equity method investments                     $ 5,800  
Noncontrolling interest in joint ventures                     29,800  
Retail | Various | Walgreens JV                        
Related Party Transaction [Line Items]                        
Number of real estate properties | property               1 24      
Nonrelated Party | Gardena JV                        
Related Party Transaction [Line Items]                        
Equity method investment, ownership percentage 10.00%                      
Affiliated Entity | Gardena JV                        
Related Party Transaction [Line Items]                        
Equity method investment, ownership percentage 62.05%                      
Related Party | Gardena JV                        
Related Party Transaction [Line Items]                        
Payments to acquire property $ 44,000                      
Equity method investment, ownership percentage 27.95%                      
Related Party | Commercial Mortgage Receivable, Held-For-Investment                        
Related Party Transaction [Line Items]                        
Total commercial mortgage loans, held for investment, net   37,100     37,100     $ 37,100        
Interest income   700   $ 700 1,300 $ 1,400            
Related Party | Industrial | Jeffersonville, GA                        
Related Party Transaction [Line Items]                        
Real estate investment property, net                     $ 139,500  
Related Party | Industrial | Jeffersonville, GA | Franklin BSP Realty Trust, Inc                        
Related Party Transaction [Line Items]                        
Noncontrolling interest, ownership percentage by parent                     79.00%  
Real estate investments, joint ventures                     $ 109,800  
Equity method investments                     21,100  
Related Party | Industrial | Jeffersonville, GA | Franklin BSP Realty Trust, Inc | Mortgages | September 2021 Mortgage Note Payable, Eliminated in Consolidation                        
Related Party Transaction [Line Items]                        
Principal amount             $ 89,400       $ 88,700  
Fund             $ 24,200          
Related Party | Industrial | Jeffersonville, GA | Jeffersonville JV, Affiliate                        
Related Party Transaction [Line Items]                        
Noncontrolling interest, ownership percentage by noncontrolling owners                     21.00%  
Related Party | Industrial | Jeffersonville, GA | Jeffersonville JV, Affiliate | Mortgages | September 2021 Mortgage Note Payable, Affiliate                        
Related Party Transaction [Line Items]                        
Principal amount                     $ 24,000  
Related Party | Retail | Various | Walgreens JV                        
Related Party Transaction [Line Items]                        
Number of real estate properties | property                   24    
Related Party | Retail | Various | Franklin BSP Realty Trust, Inc | Walgreens JV                        
Related Party Transaction [Line Items]                        
Noncontrolling interest, ownership percentage by parent                   75.618%    
Related Party | Retail | Various | Walgreens JV, Affiliate | Walgreens JV                        
Related Party Transaction [Line Items]                        
Noncontrolling interest, ownership percentage by noncontrolling owners                   24.242%    
Related Party | Retail | Various | Walgreens JV, Affiliate | Commercial Portfolio Segment                        
Related Party Transaction [Line Items]                        
Total commercial mortgage loans, held for investment, net                   $ 149,700    
Affiliated Entity                        
Related Party Transaction [Line Items]                        
Servicing fee income   $ 1,200     $ 2,000              
Aggregate principal balance     $ 124,700                  
Accrued interest     400                  
Debt assumption on repurchases agreements     $ 99,600                  
Benefit Street Partners LLC | Related Party                        
Related Party Transaction [Line Items]                        
Monthly asset management fee (percent)   0.125%     0.125%              
Subordinated performance fee, percent that total return exceeds per year   6.00%     6.00%              
Percent of excess total return   15.00%     15.00%              
Maximum annual subordinated performance fee payable percent of total return   10.00%     10.00%              
Benefit Street Partners LLC | Related Party | Fee to Acquire and Originate Real Estate Debt                        
Related Party Transaction [Line Items]                        
Transaction rate (percent)         0.50%              
[1] Includes pledged assets of $243.4 million and $329.2 million as of June 30, 2026 and December 31, 2025, respectively.