v3.26.3
Loans Held for Investment at Fair Value - Summary of Distribution of Company's Loans Held for Investment at Fair Value (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Financing Receivable Recorded Investment [Line Items]    
Loans held for investment at fair value $ 14,401,385 $ 8,532,644
Asset-backed financings at fair value (1) [1] 14,400,024 8,530,939
Loans held for investment at fair value, pledged to creditors 14,400,024 8,530,939
Loans in Variable Interest Entities [Member]    
Financing Receivable Recorded Investment [Line Items]    
Loans held for investment at fair value 14,400,024 8,530,939
Distressed [Member]    
Financing Receivable Recorded Investment [Line Items]    
Loans held for investment at fair value 1,361 1,705
Non-owner occupied properties [Member]    
Financing Receivable Recorded Investment [Line Items]    
Loans held for investment at fair value 8,392,665 6,332,497
Owner occupied properties [Member]    
Financing Receivable Recorded Investment [Line Items]    
Loans held for investment at fair value 2,874,660 588,788
Fixed interest rate jumbo loans held in a VIE [Member]    
Financing Receivable Recorded Investment [Line Items]    
Loans held for investment at fair value $ 3,132,699 $ 1,609,654
[1] As discussed in Note 6 ‒ Variable Interest Entities ‒ Subordinate and Senior Non-Agency Mortgage-Backed Securities, the
Company holds a portion of the beneficial interests in the VIEs. At September 30, 2026 and December 31, 2025, $1.2 billion and $648.2 million, respectively, of such retained interests were pledged to secure Assets sold under agreements to repurchase.