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Residential Whole Loans - Additional Credit Related Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | $ 0 |  |
2021 | 76,777 |  |
2020 | 317,399 |  |
2019 | 868,882 |  |
2018 | 390,020 |  |
Prior | 666,970 |  |
Residential whole loans, total or weighted average | 2,320,048 |  |
Gross write-offs, 2019 | 226 |  |
Gross write-offs, 2018 | 71 |  |
Gross write-offs, prior | 226 |  |
Three Months Ended March 31, 2022 Gross write-offs | $ 523 | $ 1,217 |
Ratio Loan-To-Value | 80.00% |  |
Debt-to-Value Ratio, Less than 80 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | $ 0 |  |
2021 | 74,015 |  |
2020 | 295,689 |  |
2019 | 842,329 |  |
2018 | 374,784 |  |
Prior | 530,216 |  |
Residential whole loans, total or weighted average | 2,117,033 |  |
Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 2,762 |  |
2020 | 21,710 |  |
2019 | 26,553 |  |
2018 | 15,236 |  |
Prior | 136,754 |  |
Residential whole loans, total or weighted average | 203,015 |  |
Non-QM loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 57,984 |  |
2020 | 265,020 |  |
2019 | 593,873 |  |
2018 | 312,961 |  |
Prior | 35,893 |  |
Residential whole loans, total or weighted average | 1,265,731 |  |
Gross write-offs, 2018 | 51 |  |
Three Months Ended March 31, 2022 Gross write-offs | 51 |  |
Non-QM loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 55,222 |  |
2020 | 246,102 |  |
2019 | 584,293 |  |
2018 | 302,545 |  |
Prior | 34,265 |  |
Residential whole loans, total or weighted average | 1,222,427 |  |
Non-QM loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 2,762 |  |
2020 | 18,918 |  |
2019 | 9,580 |  |
2018 | 10,416 |  |
Prior | 1,628 |  |
Residential whole loans, total or weighted average | 43,304 |  |
Non-QM loans | Settled Whole Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Purchased performing loans | $ 3,621,124 |  | $ 3,453,242
Ratio Loan-To-Value | 65.00% |  | 66.00%
Rehabilitation loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | $ 0 |  |
2021 | 4,046 |  |
2020 | 21,622 |  |
2019 | 104,677 |  |
2018 | 19,407 |  |
Prior | 4,756 |  |
Residential whole loans, total or weighted average | 154,508 |  |
Gross write-offs, 2019 | 199 |  |
Gross write-offs, 2018 | 20 |  |
Three Months Ended March 31, 2022 Gross write-offs | 219 |  |
Rehabilitation loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 4,046 |  |
2020 | 19,342 |  |
2019 | 92,938 |  |
2018 | 14,673 |  |
Prior | 3,057 |  |
Residential whole loans, total or weighted average | 134,056 |  |
Rehabilitation loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 2,280 |  |
2019 | 11,739 |  |
2018 | 4,734 |  |
Prior | 1,699 |  |
Residential whole loans, total or weighted average | 20,452 |  |
Rehabilitation loans | Settled Whole Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Purchased performing loans | $ 885,155 |  | $ 727,964
Ratio Loan-To-Value | 67.00% |  | 67.00%
Single-family rental loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | $ 0 |  |
2021 | 14,747 |  |
2020 | 30,757 |  |
2019 | 170,332 |  |
2018 | 57,652 |  |
Prior | 9,602 |  |
Residential whole loans, total or weighted average | 283,090 |  |
Gross write-offs, 2019 | 27 |  |
Three Months Ended March 31, 2022 Gross write-offs | 27 |  |
Single-family rental loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 14,747 |  |
2020 | 30,245 |  |
2019 | 165,098 |  |
2018 | 57,566 |  |
Prior | 9,602 |  |
Residential whole loans, total or weighted average | 277,258 |  |
Single-family rental loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 512 |  |
2019 | 5,234 |  |
2018 | 86 |  |
Prior | 0 |  |
Residential whole loans, total or weighted average | 5,832 |  |
Single-family rental loans | Settled Whole Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Purchased performing loans | $ 1,152,195 |  | $ 949,772
Ratio Loan-To-Value | 70.00% |  | 70.00%
Seasoned performing loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | $ 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 98,269 |  |
Residential whole loans, total or weighted average | 98,269 |  |
Seasoned performing loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 95,307 |  |
Residential whole loans, total or weighted average | 95,307 |  |
Seasoned performing loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 2,962 |  |
Residential whole loans, total or weighted average | 2,962 |  |
Seasoned performing loans | Settled Whole Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Purchased performing loans | $ 98,224 |  | $ 101,995
Ratio Loan-To-Value | 36.00% |  | 37.00%
Purchased Credit Deteriorated Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | $ 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 518,450 |  |
Residential whole loans, total or weighted average | 518,450 |  | $ 547,772
Gross write-offs, prior | 226 |  |
Three Months Ended March 31, 2022 Gross write-offs | 226 |  |
Purchased Credit Deteriorated Loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 387,985 |  |
Residential whole loans, total or weighted average | 387,985 |  |
Purchased Credit Deteriorated Loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
2018 | 0 |  |
Prior | 130,465 |  |
Residential whole loans, total or weighted average | 130,465 |  |
Certain rehabilitation loans | Settled Whole Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Purchased performing loans | $ 160,500 |  | $ 137,300
Ratio Loan-To-Value | 74.00% |  | 71.00%

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