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Residential Loans - Quarterly Activity of Residential Loans Held-for-Sale (Details) - Residential Loans $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) securitization
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal balance of loans acquired | $ 181,972 | $ 1,145,450 | $ 235,018 | $ 3,260,641
Principal balance of loans sold | 8,925 | 1,238,327 | 182,078 | 3,065,691
Principal balance of loans transferred to HFI | 0 | 0 | 657,295 | 687,192
Net market valuation gains (losses) recorded | $ (1,085) | $ (32,527) | $ 6,093 | (63,978)
Legacy Sequoia |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal balance of loans acquired |  |  |  | $ 102,000
Number of seasoned securities | securitization |  |  |  | 3

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