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Residential Whole Loans - Residential Whole Loans (Details) $ in Thousands | Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($) loan
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | $ 2,647,099 |
Allowance for Credit Losses | (39,447) | $ (86,833)
Total Residential Whole Loans | $ 7,913,000 | $ 5,325,401
Number of loans | loan | 24,095 | 18,734
Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | $ 6,332,405 | $ 3,521,624
Nonperforming Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 1,072,270 | 1,216,902
Held at Carrying Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Allowance for Credit Losses | (39,447) | (86,833)
Total Residential Whole Loans | $ 2,607,651 | $ 4,108,499
Number of loans | loan | 9,361 | 13,112
Held at Carrying Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | $ 2,099,326 | $ 3,521,624
Held at Carrying Value | Nonperforming Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 0 | 0
Held at Fair Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Allowance for Credit Losses | 0 | 0
Total Residential Whole Loans | $ 5,305,349 | $ 1,216,902
Number of loans | loan | 14,734 | 5,622
Held at Fair Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | $ 4,233,079 | $ 0
Held at Fair Value | Nonperforming Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 1,072,270 | 1,216,902
Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 1,448,162 |
Non-QM loans | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 3,461,531 | 2,357,185
Non-QM loans | Held at Carrying Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 1,448,162 | 2,357,185
Non-QM loans | Held at Fair Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 2,013,369 | 0
Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 217,315 |
Rehabilitation loans | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 734,845 | 581,801
Rehabilitation loans | Held at Carrying Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 217,315 | 581,801
Rehabilitation loans | Held at Fair Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 517,530 | 0
Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 331,808 |
Single-family rental loans | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 951,223 | 446,374
Single-family rental loans | Held at Carrying Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 331,808 | 446,374
Single-family rental loans | Held at Fair Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 619,415 | 0
Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 102,042 |
Seasoned performing loans | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 102,041 | 136,264
Seasoned performing loans | Held at Carrying Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 102,041 | 136,264
Seasoned performing loans | Held at Fair Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 0 | 0
Agency eligible investor loans | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 1,082,765 | 0
Agency eligible investor loans | Held at Carrying Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 0 | 0
Agency eligible investor loans | Held at Fair Value | Performing Financial Instruments |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 1,082,765 | 0
Purchased Credit Deteriorated Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 547,772 | 673,708
Purchased Credit Deteriorated Loans | Held at Carrying Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 547,772 | 673,708
Purchased Credit Deteriorated Loans | Held at Fair Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | $ 0 | $ 0

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