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Residential Consumer Loans - Schedule of Activity of Residential Consumer Loans Held-for-Investment at Consolidated Entities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal value of loans transferred from HFS to HFI |  |  | $ 5,773,627 | $ 4,553,378
Held-for-investment at fair value | Securitized Jumbo Loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Net market valuation gains (losses) recorded | $ 102,295 | $ 256,034 | 236,432 | 152,635
Held-for-investment at fair value | Securitized Jumbo Loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal value of loans transferred from HFS to HFI | $ 1,878,024 | $ 1,528,163 | $ 5,551,389 | $ 4,140,150

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