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Residential Whole Loans - Additional Credit Related Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | $ 0 |  |
2022 | 0 |  |
2021 | 63,199 |  |
2020 | 226,136 |  |
2019 | 603,828 |  |
Prior | 859,916 |  |
Residential whole loans, total or weighted average | 1,753,080 |  |
Gross write-offs, 2023 | 0 |  |
Gross write-offs, 2022 | 0 |  |
Gross write-offs, 2021 | 0 |  |
Gross write-offs, 2020 | 0 |  |
Gross write-offs, 2019 | 1,598 |  |
Gross write-offs, prior | 968 |  |
Three Months Ended March 31, 2023 Gross write-offs | $ 2,567 | $ 523 |
Ratio Loan-To-Value | 80.00% |  |
Debt-to-Value Ratio, Less than 80 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | $ 0 |  |
2022 | 0 |  |
2021 | 61,079 |  |
2020 | 213,320 |  |
2019 | 592,776 |  |
Prior | 764,170 |  |
Residential whole loans, total or weighted average | 1,631,345 |  |
Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 2,120 |  |
2020 | 12,816 |  |
2019 | 11,053 |  |
Prior | 95,746 |  |
Residential whole loans, total or weighted average | 121,734 |  |
Non-QM loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 49,025 |  |
2020 | 197,861 |  |
2019 | 453,299 |  |
Prior | 257,914 |  |
Residential whole loans, total or weighted average | 958,099 |  |
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 |  |
Three Months Ended March 31, 2023 Gross write-offs | 0 |  |
Non-QM loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 46,905 |  |
2020 | 185,045 |  |
2019 | 447,565 |  |
Prior | 251,532 |  |
Residential whole loans, total or weighted average | 931,047 |  |
Non-QM loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 2,120 |  |
2020 | 12,816 |  |
2019 | 5,734 |  |
Prior | 6,382 |  |
Residential whole loans, total or weighted average | $ 27,052 |  |
Non-QM loans | Settled Whole Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Ratio Loan-To-Value | 65.00% |  | 65.00%
Transitional loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | $ 0 |  |
2022 | 0 |  |
2021 | 729 |  |
2020 | 4,738 |  |
2019 | 35,308 |  |
Prior | 12,497 |  |
Residential whole loans, total or weighted average | 53,272 |  |
Gross write-offs, 2023 | 0 |  |
Gross write-offs, 2022 | 0 |  |
Gross write-offs, 2021 | 0 |  |
Gross write-offs, 2020 | 0 |  |
Gross write-offs, 2019 | 1,148 |  |
Gross write-offs, prior | 855 |  |
Three Months Ended March 31, 2023 Gross write-offs | 2,003 |  |
Transitional loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 729 |  |
2020 | 4,738 |  |
2019 | 32,118 |  |
Prior | 12,497 |  |
Residential whole loans, total or weighted average | 50,082 |  |
Transitional loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 3,190 |  |
Prior | 0 |  |
Residential whole loans, total or weighted average | $ 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 |  |
2022 | 0 |  |
2021 | 13,445 |  |
2020 | 23,537 |  |
2019 | 115,221 |  |
Prior | 49,360 |  |
Residential whole loans, total or weighted average | 201,563 |  |
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 |  |
Three Months Ended March 31, 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 |  |
2022 | 0 |  |
2021 | 13,445 |  |
2020 | 23,537 |  |
2019 | 113,092 |  |
Prior | 49,275 |  |
Residential whole loans, total or weighted average | 199,350 |  |
Single-family rental loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 2,128 |  |
Prior | 85 |  |
Residential whole loans, total or weighted average | $ 2,213 |  |
Single-family rental loans | Settled Whole Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Ratio Loan-To-Value | 69.00% |  | 69.00%
Seasoned performing loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | $ 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 79,465 |  |
Residential whole loans, total or weighted average | 79,465 |  |
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 |  |
Three Months Ended March 31, 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 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 76,938 |  |
Residential whole loans, total or weighted average | 76,938 |  |
Seasoned performing loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 2,527 |  |
Residential whole loans, total or weighted average | $ 2,527 |  |
Seasoned performing loans | Settled Whole Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
Ratio Loan-To-Value | 30.00% |  | 30.00%
Purchased Credit Deteriorated Loans |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | $ 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 460,680 |  |
Residential whole loans, total or weighted average | 460,680 |  | $ 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 | 113 |  |
Three Months Ended March 31, 2023 Gross write-offs | 113 |  |
Purchased Credit Deteriorated Loans | Debt-to-Value Ratio, Less than 80 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 373,929 |  |
Residential whole loans, total or weighted average | 373,929 |  |
Purchased Credit Deteriorated Loans | Debt-to-Value Ratio, 81 to 100 Percent |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |
2023 | 0 |  |
2022 | 0 |  |
2021 | 0 |  |
2020 | 0 |  |
2019 | 0 |  |
Prior | 86,752 |  |
Residential whole loans, total or weighted average | $ 86,752 |  |
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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