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Residential Whole Loans (LTV on Loans) (Details) $ in Thousands | Jun. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Unsettled residential whole loans | $ 131,300 |
90 Days or More Delinquent | Carrying Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | 386,198 | $ 432,774
UPB | 406,728 | 455,112
90 Days or More Delinquent | Fair Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | 513,585 | 571,729
UPB | 530,575 | 625,621
90 Days or More Delinquent | Fair Value | Nonperforming |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | 510,611 | 571,729
UPB | $ 527,572 | $ 625,621
LTV (as a percent) | 0.822 | 0.868
90 Days or More Delinquent | Fair Value | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 2,974 | $ 0
UPB | $ 3,003 | $ 0
LTV (as a percent) | 0.653 | 0
90 Days or More Delinquent | Purchased credit deteriorated loans | Carrying Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 105,487 | $ 119,621
UPB | $ 128,147 | $ 145,028
LTV (as a percent) | 0.846 | 0.867
90 Days or More Delinquent | Non-QM loans | Carrying Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 140,051 | $ 148,387
UPB | $ 137,252 | $ 144,681
LTV (as a percent) | 0.658 | 0.659
90 Days or More Delinquent | Rehabilitation loans | Carrying Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 108,942 | $ 136,347
UPB | $ 108,942 | $ 136,347
LTV (as a percent) | 0.679 | 0.658
90 Days or More Delinquent | Single-family rental loans | Carrying Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 22,595 | $ 20,388
UPB | $ 22,595 | $ 20,233
LTV (as a percent) | 0.737 | 0.727
90 Days or More Delinquent | Seasoned performing loans | Carrying Value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Carrying Value / Fair Value | $ 9,123 | $ 8,031
UPB | $ 9,792 | $ 8,823
LTV (as a percent) | 0.501 | 0.551

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