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Residential Investor Loans - Schedule of Classifications and Carrying Values of Residential Investor Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Residential Investor Bridge, Unsecuritized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | $ 101,000 |
Held-for-sale at fair value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 783,271 | $ 237,224
Held-for-sale at fair value | Residential Investor Term, Unsecuritized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 157,339 | 158,637
Held-for-sale at fair value | Residential Investor Term, Securitized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 0 | 0
Held-for-sale at fair value | Residential Investor Bridge, Unsecuritized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 625,932 | 78,587
Held-for-sale at fair value | Residential Investor Bridge, Securitized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 0 | 0
Held-for-investment at fair value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 3,074,326 | 4,349,866
Held-for-investment at fair value | Residential Investor Term, Unsecuritized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 0 | 0
Held-for-investment at fair value | Residential Investor Term, Securitized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 2,143,226 | 2,485,069
Held-for-investment at fair value | Residential Investor Bridge, Unsecuritized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 0 | 1,041,694
Held-for-investment at fair value | Residential Investor Bridge, Securitized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 931,100 | 823,103
Total Residential Investor Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 3,857,597 | 4,587,090
Total Residential Investor Loans | Residential Investor Term, Unsecuritized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 157,339 | 158,637
Total Residential Investor Loans | Residential Investor Term, Securitized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 2,143,226 | 2,485,069
Total Residential Investor Loans | Residential Investor Bridge, Unsecuritized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | 625,932 | 1,120,281
Total Residential Investor Loans | Residential Investor Bridge, Securitized |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Fair value of loans | $ 931,100 | $ 823,103

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