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Use of Special Purpose Entities and Variable Interest Entities - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Variable Interest Entity [Line Items] |  |  |
Total residential whole loans | $ 8,100,000 | $ 8,100,000 | $ 7,500,000
Asset-backed Securities, Securitized Loans and Receivables |  |  |
Variable Interest Entity [Line Items] |  |  |
Proceeds from issuance of debt |  | 6,103,771 | 5,286,305
Residential whole loans | 4,800,000 | 4,800,000 | 4,000,000
Securitized debt | 4,000,000 | 4,000,000 | 3,400,000
Asset-backed Securities, Securitized Loans and Receivables | Other Assets |  |  |
Variable Interest Entity [Line Items] |  |  |
Real estate owned at fair value | 30,400 | 30,400 | $ 36,500
Senior Bonds |  |  |
Variable Interest Entity [Line Items] |  |  |
Proceeds from issuance of debt | 308,800 | 832,000 |
Proceed from debt net of offering expenses and underwriting discount | $ 296,400 | $ 817,500 |

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