v3.26.1
Commercial Mortgage Loans, Held for Investment - Narrative (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
rating
loan
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
rating
loan
Dec. 31, 2024
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Nov. 30, 2021
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Amortized cost $ 22,000,000   $ 21,600,000        
Less: Allowance for credit losses [1] 49,173   38,302        
(Provision)/benefit for credit losses $ (11,391) $ 1,898          
Minimum              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Exit capitalization rate 5.00%            
Maximum              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Exit capitalization rate 9.25%            
Commercial Portfolio Segment              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Less: Allowance for credit losses $ 49,507   38,598        
(Provision)/benefit for credit losses (13,526)            
Commercial Portfolio Segment | Specific allowance for credit losses              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Less: Allowance for credit losses 16,335   4,106        
(Provision)/benefit for credit losses (14,846)            
Commercial Portfolio Segment | General allowance for credit losses              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Less: Allowance for credit losses 33,172   $ 34,492        
(Provision)/benefit for credit losses $ 1,320            
Commercial Mortgage Receivable, Held-For-Investment              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Number of loans | loan 177   169        
Amortized cost $ 4,596,001   $ 4,421,436        
Less: Allowance for credit losses $ 49,173   $ 38,302 $ 78,083      
Initial risk rating | rating 2   2        
Weighted average risk rating of loans | rating 2.5   2.4        
Commercial Mortgage Receivable, Held-For-Investment | Specific allowance for credit losses              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Less: Allowance for credit losses $ 16,335   $ 4,106        
(Provision)/benefit for credit losses (14,846)   (5,748)        
Commercial Mortgage Receivable, Held-For-Investment | General allowance for credit losses              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Less: Allowance for credit losses 32,838   34,196        
(Provision)/benefit for credit losses 1,358   12,669        
Commercial Mortgage Receivable, Held-For-Investment | Commercial Portfolio Segment              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Amortized cost 4,596,001   4,421,436        
Less: Allowance for credit losses 49,173   $ 38,302        
Commercial Mortgage Receivable, Held-For-Investment | Commercial Portfolio Segment | Nonperforming Financial Instruments              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Number of loans | loan     7        
Commercial Mortgage Receivable, Held-For-Investment | Office | Commercial Portfolio Segment | Nonperforming Financial Instruments              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Number of loans | loan     4        
Commercial Mortgage Receivable, Held-For-Investment | Office | GEORGIA | Commercial Portfolio Segment | Nonperforming Financial Instruments | Specific allowance for credit losses              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Less: Allowance for credit losses 2,000   $ 4,100        
Commercial Mortgage Receivable, Held-For-Investment | Multifamily | GEORGIA | Commercial Portfolio Segment              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Amortized cost           $ 23,000  
Commercial Mortgage Receivable, Held-For-Investment | Multifamily | GEORGIA | Commercial Portfolio Segment | Nonperforming Financial Instruments              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Amortized cost     21,700        
Commercial Mortgage Receivable, Held-For-Investment | Multifamily | GEORGIA | Commercial Portfolio Segment | Nonperforming Financial Instruments | Specific allowance for credit losses              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Less: Allowance for credit losses 600   $ 2,000        
Commercial Mortgage Receivable, Held-For-Investment | Hospitality Property | ARIZONA | Commercial Portfolio Segment              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Amortized cost             $ 39,000
Commercial Mortgage Receivable, Held-For-Investment | Hospitality Property | ARIZONA | Commercial Portfolio Segment | Nonperforming Financial Instruments              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Amortized cost 36,800            
Commercial Mortgage Receivable, Held-For-Investment | Hospitality Property | ARIZONA | Commercial Portfolio Segment | Nonperforming Financial Instruments | Specific allowance for credit losses              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Less: Allowance for credit losses 2,000            
Commercial Mortgage Receivable, Held-For-Investment | June 2021 Multifamily | NORTH CAROLINA | Commercial Portfolio Segment              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Amortized cost         $ 46,000    
Commercial Mortgage Receivable, Held-For-Investment | June 2021 Multifamily | NORTH CAROLINA | Commercial Portfolio Segment | Nonperforming Financial Instruments              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Amortized cost 44,500            
Commercial Mortgage Receivable, Held-For-Investment | June 2021 Multifamily | NORTH CAROLINA | Commercial Portfolio Segment | Nonperforming Financial Instruments | Specific allowance for credit losses              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Less: Allowance for credit losses 1,100            
Commercial Mortgage Receivable, Held-For-Investment | December 2021 Multifamily | NORTH CAROLINA | Commercial Portfolio Segment              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Amortized cost           $ 82,900  
Commercial Mortgage Receivable, Held-For-Investment | December 2021 Multifamily | NORTH CAROLINA | Commercial Portfolio Segment | Nonperforming Financial Instruments              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Amortized cost 79,800            
Commercial Mortgage Receivable, Held-For-Investment | December 2021 Multifamily | NORTH CAROLINA | Commercial Portfolio Segment | Nonperforming Financial Instruments | Specific allowance for credit losses              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Less: Allowance for credit losses $ 13,200            
[1] Includes pledged assets of $409.4 million and $329.2 million as of March 31, 2026 and December 31, 2025, respectively.