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Residential Consumer Loans - Schedule of Characteristics of Residential Consumer Loans Held-for-Investment (Details) - Held-for-investment at fair value - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Securitized Jumbo Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
UPB	$ 13,351,590	$ 9,350,286
Average loan balance (UPB)	899	842
Fair value of loans	$ 13,079,486	$ 8,819,554
Weighted average coupon	5.67%	5.35%
UPB of loans in foreclosure	$ 12,132	$ 10,493
Average foreclosure balance (UPB)	607	552
Securitized Re-Performing Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
UPB		1,514,432
Average loan balance (UPB)		155
Fair value of loans		$ 1,244,722
Weighted average coupon		4.49%
UPB of loans in foreclosure		$ 41,913
Average foreclosure balance (UPB)		185
Financing Receivables, Equal to Greater than 90 Days Past Due | Securitized Jumbo Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance of loans with 90+ day delinquencies	41,396	19,480
Average 90+ days delinquent balance (UPB)	$ 753	573
Financing Receivables, Equal to Greater than 90 Days Past Due | Securitized Re-Performing Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance of loans with 90+ day delinquencies		106,910
Average 90+ days delinquent balance (UPB)		$ 172

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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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