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Residential Investor Loans - Additional Information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 USD ($) loan | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Principal payments on real estate securities |  | $ 5,331 | $ 950 |
Commitment To Fund Residential Investor Bridge Loan |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Commitment to fund loan | $ 429,000 | $ 429,000 |  |
SOFR |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Real estate owned, rate (as a percent) |  | 62.00% |  |
Fixed Rate |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Real estate owned, rate (as a percent) |  | 38.00% |  |
Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Weighted average term increase from modification | 16 months |  |  |
Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Weighted average term increase from modification | 19 months |  |  |
Bridge Loans | Minimum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Residential bridge loans held-for-investment, original maturities (in months) |  | 6 months |  |
Bridge Loans | Maximum |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Residential bridge loans held-for-investment, original maturities (in months) |  | 36 months |  |
Residential Investor Bridge |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Loans sold | $ 66,000 | $ 253,000 |  |
Principal payments on real estate securities | 13,000 | 34,000 |  |
Financing receivable, modified in period, amount | $ 116,000 | 1,910,000 |  | $ 2,100,000
Number of modified loans | loan | 2 |  |  |
Unpaid principal balance | $ 364,000 | 364,000 |  | 340,000
Fair value of loans | $ 320,000 | $ 320,000 |  | 312,000
Deferred interest | 10.49% | 10.49% |  |
Residential Investor Bridge | Financing Receivables Less Than 90 Days Past Due |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Unpaid principal balance | $ 215,000 | $ 215,000 |  | $ 207,000
Residential Investor Bridge | Payment Deferral |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing receivable, modified in period, amount | $ 228,000 |  |  |
Deferred interest | 4.86% | 4.86% |  |
Residential Investor Bridge | Interest Rate Below Market Reduction |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing receivable, modified in period, amount |  | $ 113,000 |  |
Residential Investor Bridge | Estimated Fair Value |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing receivable, modified in period, amount | $ 115,000 |  |  |
Residential Investor Bridge | Estimated Fair Value | Interest Rate Below Market Reduction |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing receivable, modified in period, amount |  | $ 111,000 |  |
Financial Instrument, Term One | Residential Investor Term Loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing receivable, term | 3 years | 3 years |  |
Financial Instrument, Term Two | Residential Investor Term Loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing receivable, term | 5 years | 5 years |  |
Financial Instrument, Term Three | Residential Investor Term Loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing receivable, term | 7 years | 7 years |  |
Financial Instrument, Term Four | Residential Investor Term Loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing receivable, term | 10 years | 10 years |  |

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