v3.26.1
Secured Borrowings - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2026
Jan. 31, 2026
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Financing          
Secured Borrowings          
Face amount $ 5,111,283   $ 5,111,283   $ 5,153,316
Morgan Stanley Bank, N.A.          
Secured Borrowings          
Amount at risk $ 900,000   $ 900,000    
Weighted average extended maturities     4 years 1 month 6 days    
Repurchase Agreements          
Secured Borrowings          
Percentage of repurchase agreements for which margin calls are limited to collateral specific credit marks 68.00%   68.00%    
Percentage of repurchase agreements containing margin call provisions for general capital market activity 32.00%   32.00%    
Percentage of repurchase agreements containing margin call provisions that pertain to loans held-for-sale 7.00%   7.00%    
Secured Borrowings          
Secured Borrowings          
Amortization of deferred financing costs     $ 9,200 $ 8,800  
Long-term debt, gross $ 13,863,136   13,863,136   12,780,793
Several Commercial Credit Facilities | Line of Credit          
Secured Borrowings          
Increase in borrowing capacity     $ 250,000    
Several Commercial Credit Facilities | Line of Credit | Minimum          
Secured Borrowings          
Weighted average maturity period (in years)     1 year 2 months 12 days    
Several Commercial Credit Facilities | Line of Credit | Maximum          
Secured Borrowings          
Weighted average maturity period (in years)     1 year 10 months 24 days    
Collateralized Loan Obligations, Starwood 2026-SIF7          
Secured Borrowings          
Face amount   $ 600,000      
Principal amount of notes purchased by third-party investors   496,200      
Long-term debt, gross   $ 103,800      
CLO contribution period   3 years      
STWD 2024-SIF3          
Secured Borrowings          
Repayments of debt   $ 330,000      
STWD 2024-SIF3 | Financing          
Secured Borrowings          
Face amount         $ 330,000
Pricing margin (as a percent)         2.41%
ABS, FI Series 2026-1          
Secured Borrowings          
Principal amount of notes purchased by third-party investors $ 466,400   $ 466,400    
Weighted average interest rate 5.06%   5.06%    
ABS, FI Series 2026-1 | Financing          
Secured Borrowings          
Face amount $ 466,400   $ 466,400    
Weighted average interest rate 5.06%   5.06%    
ABS, FI Series 2026-1 | Weighted-average          
Secured Borrowings          
Initial term 5 years 4 months 24 days        
ABS, FI Series 2023-1          
Secured Borrowings          
Repayments of debt $ 323,600        
Weighted average interest rate 6.65%   6.65%    
ABS, FI Series 2023-1 | Financing          
Secured Borrowings          
Face amount         $ 323,900
Weighted average interest rate         6.65%
Securitized Financing          
Secured Borrowings          
Amortization of deferred financing costs     $ 1,700 $ 1,200  
Deferred financing costs, net of amortization $ 29,100   29,100   $ 21,600
ABS Financing | Financing          
Secured Borrowings          
Face amount $ 1,410,237   $ 1,410,237   $ 1,268,328
Pricing margin (as a percent)     5.29%   5.73%