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Residential Investor Loans - Schedule of Activity of Unsecuritized Investor Loans (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) loan | Sep. 30, 2024 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal balance of loans originated |  |  | $ 9,125,996 | $ 4,910,749
Principal balance of loans sold to third parties |  |  | $ 15,756 | 5,331
Number of loans transferred | loan |  |  | 1 |
Residential Investor Term, Unsecuritized |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal balance of loans originated | $ 228,298 | $ 158,584 | $ 645,061 | 493,212
Principal balance of loans acquired (1) | 530 | 3,145 | 43,567 | 3,793
Principal balance of loans sold to third parties | 228,741 | 206,380 | 661,951 | 464,836
Transfer of loans between portfolios | 0 | 0 | 0 | 0
Residential Investor Bridge, Unsecuritized |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal balance of loans originated | 258,594 | 286,833 | 666,494 | 714,977
Principal balance of loans acquired (1) | 80,223 | 0 | 105,456 | 15,677
Principal balance of loans sold to third parties | 625,196 | 67,655 | 1,007,770 | 277,170
Transfer of loans between portfolios | $ 38,179 | $ (62,386) | $ 63,554 | $ (250,319)

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- Definition Line items represent financial concepts included in a table. 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