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Residential Whole Loans (LTV on Loans) (Details) - 90 Days or More Past Due: $ in Thousands | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | ---
Purchased Credit Deteriorated Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 117,509 | $ 119,621
UPB | $ 142,850 | $ 145,028
LTV | 0.859 | 0.867
Non-QM Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 135,260 | $ 148,387
UPB | $ 132,732 | $ 144,681
LTV | 0.657 | 0.659
Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 136,991 | $ 136,347
UPB | $ 136,991 | $ 136,347
LTV | 0.657 | 0.658
Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 24,091 | $ 20,388
UPB | $ 24,052 | $ 20,233
LTV | 0.734 | 0.727
Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 8,721 | $ 8,031
UPB | $ 9,449 | $ 8,823
LTV | 0.507 | 0.551
Residential Loans At Fair Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 555,171 | $ 571,729
UPB | $ 584,025 | $ 625,621
LTV | 0.826 | 0.868

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