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Residential Loans - Quarterly Activity of Residential Loans Held-for-Sale (Details) - Residential Loans $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2022 USD ($) securitization | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) securitization | Sep. 30, 2021 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal balance of loans acquired | $ 336,698 | $ 3,167,186 | $ 3,597,339 | $ 9,747,867
Principal balance of loans sold | 662,302 | 2,360,862 | 3,727,993 | 6,787,490
Principal balance of loans transferred to HFI | 0 | 448,878 | 687,192 | 1,623,000
Net market valuation gains (losses) recorded | (26,674) | $ 9,861 | (90,652) | $ 59,568
Legacy Sequoia |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal balance of loans acquired | $ 0 |  | $ 102,000 |
Number of seasoned securities | securitization | 0 |  | 3 |

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- Definition For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14172-108612 + Details
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