v3.26.3
Use of Special Purpose Entities (SPE) and Variable Interest Entities (VIE) - Narrative (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
securitization
Sep. 30, 2026
USD ($)
securitization
Dec. 31, 2025
USD ($)
securitization
Variable Interest Entity [Line Items]      
Number of securitizations completed | securitization 1 4  
Proceeds from securitizations of loans held-for-investment $ 338,900,000 $ 1,200,000,000  
Number of securitizations optional redemption right exercised | securitization   3  
Proceeds from residential loan securitization redemption (approximately)   $ 477,500,000  
Reversal of unrealized loss   600,000  
Gain (loss) on extinguishment   0  
Proceeds from re-securitization redemption 57,600,000    
Reversal of unrealized gain 300,000 300,000  
Gain (loss) on extinguishment 0 $ 0  
VIE, Primary Beneficiary | Consolidated SLST      
Variable Interest Entity [Line Items]      
Proceeds from re-securitization redemption $ 114,300,000    
Number of securitization trusts | securitization 3 3 3
VIE, Primary Beneficiary | Consolidated SLST | Level 3      
Variable Interest Entity [Line Items]      
Variable interest entity, primary beneficiary, maximum loss exposure, amount $ 122,100,000 $ 122,100,000 $ 151,500,000