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REVERSE MORTGAGE LOANS HELD FOR INVESTMENT AND HMBS-RELATED BORROWINGS - Schedule of Gain on Reverse Mortgage Loans Held for Investment (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Fair Value Disclosures [Abstract] |  |
Gain on new originations | $ 1,284 | $ 0
Gain on tail securitizations | 322 | 0
Net interest income | 23 | 0
Change in fair value of reverse mortgage loans held for investment | 1,601 | 0
Fair value gain recognized in earnings | $ 3,230 | $ 0

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- Definition Fair Value, Gain on Tail Securitizations + References No definition available. + Details
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