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Residential Whole Loans - Additional Credit Related Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2023 | Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | $ 0 |  |  |  | $ 0 |
2022 | 0 |  |  |  | 0 |
2021 | 60,324 |  |  |  | 60,324 |
2020 | 215,654 |  |  |  | 215,654 |
2019 | 571,798 |  |  |  | 571,798 |
Prior | 823,012 |  |  |  | 823,012 |
Residential whole loans, total or weighted average | 1,670,788 |  |  |  | 1,670,788 |
Gross write-offs, 2023 |  |  |  |  | 0 |
Gross write-offs, 2022 |  |  |  |  | 0 |
Gross write-offs, 2021 |  |  |  |  | 0 |
Gross write-offs, 2020 |  |  |  |  | 118 |
Gross write-offs, 2019 |  |  |  |  | 3,036 |
Gross write-offs, prior |  |  |  |  | 1,705 |
Six Months Ended June 30, 2023 Gross write-offs | 2,292 | $ 2,567 | $ 360 | $ 523 | $ 4,859 |
Ratio Loan-To-Value |  |  |  |  | 80.00% |
Debt-to-Value Ratio, Less than 80 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | $ 0 |
2022 | 0 |  |  |  | 0 |
2021 | 58,923 |  |  |  | 58,923 |
2020 | 202,884 |  |  |  | 202,884 |
2019 | 562,298 |  |  |  | 562,298 |
Prior | 731,622 |  |  |  | 731,622 |
Residential whole loans, total or weighted average | 1,555,727 |  |  |  | 1,555,727 |
Debt-to-Value Ratio, 81 to 100 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 1,401 |  |  |  | 1,401 |
2020 | 12,770 |  |  |  | 12,770 |
2019 | 9,500 |  |  |  | 9,500 |
Prior | 91,390 |  |  |  | 91,390 |
Residential whole loans, total or weighted average | 115,061 |  |  |  | 115,061 |
Non-QM loans |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 46,910 |  |  |  | 46,910 |
2020 | 189,507 |  |  |  | 189,507 |
2019 | 433,303 |  |  |  | 433,303 |
Prior | 243,106 |  |  |  | 243,106 |
Residential whole loans, total or weighted average | 912,826 |  |  |  | 912,826 |
Gross write-offs, 2023 |  |  |  |  | 0 |
Gross write-offs, 2022 |  |  |  |  | 0 |
Gross write-offs, 2021 |  |  |  |  | 0 |
Gross write-offs, 2020 |  |  |  |  | 71 |
Gross write-offs, 2019 |  |  |  |  | 25 |
Gross write-offs, prior |  |  |  |  | 110 |
Six Months Ended June 30, 2023 Gross write-offs |  |  |  |  | 206 |
Non-QM loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 45,509 |  |  |  | 45,509 |
2020 | 176,737 |  |  |  | 176,737 |
2019 | 428,804 |  |  |  | 428,804 |
Prior | 237,126 |  |  |  | 237,126 |
Residential whole loans, total or weighted average | 888,176 |  |  |  | 888,176 |
Non-QM loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 1,401 |  |  |  | 1,401 |
2020 | 12,770 |  |  |  | 12,770 |
2019 | 4,499 |  |  |  | 4,499 |
Prior | 5,980 |  |  |  | 5,980 |
Residential whole loans, total or weighted average | 24,650 |  |  |  | $ 24,650 |
Non-QM loans | Settled Whole Loans |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Ratio Loan-To-Value |  |  |  |  | 64.00% | 65.00%
Transitional loans |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | $ 0 |
2022 | 0 |  |  |  | 0 |
2021 | 729 |  |  |  | 729 |
2020 | 3,915 |  |  |  | 3,915 |
2019 | 27,665 |  |  |  | 27,665 |
Prior | 10,118 |  |  |  | 10,118 |
Residential whole loans, total or weighted average | 42,427 |  |  |  | 42,427 |
Gross write-offs, 2023 |  |  |  |  | 0 |
Gross write-offs, 2022 |  |  |  |  | 0 |
Gross write-offs, 2021 |  |  |  |  | 0 |
Gross write-offs, 2020 |  |  |  |  | 47 |
Gross write-offs, 2019 |  |  |  |  | 2,560 |
Gross write-offs, prior |  |  |  |  | 1,181 |
Six Months Ended June 30, 2023 Gross write-offs |  |  |  |  | 3,788 |
Transitional loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 729 |  |  |  | 729 |
2020 | 3,915 |  |  |  | 3,915 |
2019 | 24,475 |  |  |  | 24,475 |
Prior | 10,118 |  |  |  | 10,118 |
Residential whole loans, total or weighted average | 39,237 |  |  |  | 39,237 |
Transitional loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 0 |  |  |  | 0 |
2020 | 0 |  |  |  | 0 |
2019 | 3,190 |  |  |  | 3,190 |
Prior | 0 |  |  |  | 0 |
Residential whole loans, total or weighted average | 3,190 |  |  |  | $ 3,190 |
Transitional loans | Settled Whole Loans |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Ratio Loan-To-Value |  |  |  |  | 65.00% | 66.00%
Single-family rental loans |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | $ 0 |
2022 | 0 |  |  |  | 0 |
2021 | 12,685 |  |  |  | 12,685 |
2020 | 22,232 |  |  |  | 22,232 |
2019 | 110,830 |  |  |  | 110,830 |
Prior | 46,033 |  |  |  | 46,033 |
Residential whole loans, total or weighted average | 191,780 |  |  |  | 191,780 |
Gross write-offs, 2023 |  |  |  |  | 0 |
Gross write-offs, 2022 |  |  |  |  | 0 |
Gross write-offs, 2021 |  |  |  |  | 0 |
Gross write-offs, 2020 |  |  |  |  | 0 |
Gross write-offs, 2019 |  |  |  |  | 451 |
Gross write-offs, prior |  |  |  |  | 0 |
Six Months Ended June 30, 2023 Gross write-offs |  |  |  |  | 451 |
Single-family rental loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 12,685 |  |  |  | 12,685 |
2020 | 22,232 |  |  |  | 22,232 |
2019 | 109,019 |  |  |  | 109,019 |
Prior | 45,948 |  |  |  | 45,948 |
Residential whole loans, total or weighted average | 189,884 |  |  |  | 189,884 |
Single-family rental loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 0 |  |  |  | 0 |
2020 | 0 |  |  |  | 0 |
2019 | 1,811 |  |  |  | 1,811 |
Prior | 85 |  |  |  | 85 |
Residential whole loans, total or weighted average | 1,896 |  |  |  | $ 1,896 |
Single-family rental loans | Settled Whole Loans |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Ratio Loan-To-Value |  |  |  |  | 68.00% | 69.00%
Seasoned performing loans |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | $ 0 |
2022 | 0 |  |  |  | 0 |
2021 | 0 |  |  |  | 0 |
2020 | 0 |  |  |  | 0 |
2019 | 0 |  |  |  | 0 |
Prior | 75,389 |  |  |  | 75,389 |
Residential whole loans, total or weighted average | 75,389 |  |  |  | 75,389 |
Gross write-offs, 2023 |  |  |  |  | 0 |
Gross write-offs, 2022 |  |  |  |  | 0 |
Gross write-offs, 2021 |  |  |  |  | 0 |
Gross write-offs, 2020 |  |  |  |  | 0 |
Gross write-offs, 2019 |  |  |  |  | 0 |
Gross write-offs, prior |  |  |  |  | 0 |
Six Months Ended June 30, 2023 Gross write-offs |  |  |  |  | 0 |
Seasoned performing loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 0 |  |  |  | 0 |
2020 | 0 |  |  |  | 0 |
2019 | 0 |  |  |  | 0 |
Prior | 72,915 |  |  |  | 72,915 |
Residential whole loans, total or weighted average | 72,915 |  |  |  | 72,915 |
Seasoned performing loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 0 |  |  |  | 0 |
2020 | 0 |  |  |  | 0 |
2019 | 0 |  |  |  | 0 |
Prior | 2,474 |  |  |  | 2,474 |
Residential whole loans, total or weighted average | 2,474 |  |  |  | $ 2,474 |
Seasoned performing loans | Settled Whole Loans |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Ratio Loan-To-Value |  |  |  |  | 29.00% | 30.00%
Purchased Credit Deteriorated Loans |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | $ 0 |
2022 | 0 |  |  |  | 0 |
2021 | 0 |  |  |  | 0 |
2020 | 0 |  |  |  | 0 |
2019 | 0 |  |  |  | 0 |
Prior | 448,366 |  |  |  | 448,366 |
Residential whole loans, total or weighted average | 448,366 |  |  |  | 448,366 | $ 470,294
Gross write-offs, 2023 |  |  |  |  | 0 |
Gross write-offs, 2022 |  |  |  |  | 0 |
Gross write-offs, 2021 |  |  |  |  | 0 |
Gross write-offs, 2020 |  |  |  |  | 0 |
Gross write-offs, 2019 |  |  |  |  | 0 |
Gross write-offs, prior |  |  |  |  | 414 |
Six Months Ended June 30, 2023 Gross write-offs |  |  |  |  | 414 |
Purchased Credit Deteriorated Loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 0 |  |  |  | 0 |
2020 | 0 |  |  |  | 0 |
2019 | 0 |  |  |  | 0 |
Prior | 365,515 |  |  |  | 365,515 |
Residential whole loans, total or weighted average | 365,515 |  |  |  | 365,515 |
Purchased Credit Deteriorated Loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
2023 | 0 |  |  |  | 0 |
2022 | 0 |  |  |  | 0 |
2021 | 0 |  |  |  | 0 |
2020 | 0 |  |  |  | 0 |
2019 | 0 |  |  |  | 0 |
Prior | 82,851 |  |  |  | 82,851 |
Residential whole loans, total or weighted average | $ 82,851 |  |  |  | $ 82,851 |
Certain rehabilitation loans | Settled Whole Loans |  |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |  |
Ratio Loan-To-Value |  |  |  |  | 69.00% | 70.00%

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