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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, 2022 | Jun. 30, 2022 | Dec. 31, 2021
Variable Interest Entity [Line Items] |  |  |
Total residential whole loans | $ 8,200,000 | $ 8,200,000 | $ 7,900,000
Asset-backed Securities, Securitized Loans and Receivables |  |  |
Variable Interest Entity [Line Items] |  |  |
Proceeds from issuance of debt |  | 5,040,474 | 3,682,082
Residential whole loans | 3,900,000 | 3,900,000 | 3,000,000
Securitized debt | 3,400,000 | 3,400,000 | 2,700,000
Asset-backed Securities, Securitized Loans and Receivables | Other Assets |  |  |
Variable Interest Entity [Line Items] |  |  |
Real estate owned at fair value | 33,500 | $ 33,500 | $ 35,400
Senior Bonds |  |  |
Variable Interest Entity [Line Items] |  |  |
Proceeds from issuance of debt | 860,900 |  |
Proceed from debt net of offering expenses and underwriting discount | $ 847,100 |  |

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