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Use of Special Purpose Entities and Variable Interest Entities - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Variable Interest Entity [Line Items] |  |
Total residential whole loans | $ 9,000,000 | $ 7,500,000
Agency eligible investor loans |  |
Variable Interest Entity [Line Items] |  |
Amount derecognized |  | 598,000
Financing receivable, sale |  | 337,800
Asset-backed Securities, Securitized Loans and Receivables |  |
Variable Interest Entity [Line Items] |  |
Proceeds from issuance of debt | 7,089,575 | 5,286,305
Residential whole loans, carrying value | 5,700,000 | 4,000,000
Securitized debt | 4,800,000 | 3,400,000
Asset-backed Securities, Securitized Loans and Receivables | Other Assets |  |
Variable Interest Entity [Line Items] |  |
Real estate owned at fair value | 33,300 | 36,500
Senior Notes |  |
Variable Interest Entity [Line Items] |  |
Proceeds from issuance of debt | 1,800,000 | 2,300,000
Proceed from debt net of offering expenses and underwriting discount | $ 1,800,000 | 2,200,000
Securitized debt |  |
Variable Interest Entity [Line Items] |  |
Financing receivable, sale |  | $ 567,200

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