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Residential Whole Loans - Residential Whole Loans, at Carrying Value Additional Information (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Weighted Average LTV Ratio | 80.00% |
Loans | $ 1,670,788 |
Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 912,826 |
Transitional loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 42,427 |
Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | 191,780 |
Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans | $ 75,389 |
Multi-Family Transitional Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Weighted Average LTV Ratio | 64.00% | 64.00%
Loans | $ 821,500 | $ 632,300
Financing Receivable, Weighted Average Term To Maturity | 15 months | 18 months
Settled Whole Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Purchased Performing Loans | $ 6,971,917 | $ 6,273,743
Unpaid Principal Balance (“UPB”) | $ 7,434,036 | $ 6,741,786
Weighted Average Coupon | 6.26% | 5.78%
Weighted Average Term to Maturity (Months) | 260 months | 271 months
60+ Delinquency % | 2.80% | 3.10%
Settled Whole Loans | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Purchased Performing Loans | $ 3,602,412 | $ 3,352,471
Unpaid Principal Balance (“UPB”) | $ 3,917,542 | $ 3,671,468
Weighted Average Coupon | 5.48% | 5.13%
Weighted Average Term to Maturity (Months) | 348 months | 351 months
Weighted Average LTV Ratio | 64.00% | 65.00%
Weighted Average Original FICO | 735 | 733
60+ Delinquency % | 2.40% | 2.60%
Settled Whole Loans | Non-QM loans | Current |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | $ 3,749,468 | $ 3,520,671
Settled Whole Loans | Non-QM loans | 30-59 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 72,290 | 56,825
Settled Whole Loans | Non-QM loans | 60-89 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 24,934 | 32,253
Settled Whole Loans | Non-QM loans | 90 or more |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 70,850 | 61,719
Settled Whole Loans | Transitional loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Purchased Performing Loans | 1,745,417 | 1,411,997
Unpaid Principal Balance (“UPB”) | $ 1,759,641 | $ 1,431,692
Weighted Average Coupon | 8.45% | 7.78%
Weighted Average Term to Maturity (Months) | 11 months | 12 months
Weighted Average LTV Ratio | 65.00% | 66.00%
Weighted Average Original FICO | 744 | 746
60+ Delinquency % | 4.10% | 5.30%
Settled Whole Loans | Transitional loans | Current |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | $ 1,675,104 | $ 1,348,815
Settled Whole Loans | Transitional loans | 30-59 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 12,749 | 6,463
Settled Whole Loans | Transitional loans | 60-89 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 8,188 | 2,234
Settled Whole Loans | Transitional loans | 90 or more |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 63,600 | 74,180
Settled Whole Loans | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Purchased Performing Loans | 1,490,673 | 1,375,297
Unpaid Principal Balance (“UPB”) | $ 1,604,083 | $ 1,485,967
Weighted Average Coupon | 6.01% | 5.74%
Weighted Average Term to Maturity (Months) | 321 months | 324 months
Weighted Average LTV Ratio | 68.00% | 69.00%
Weighted Average Original FICO | 737 | 737
60+ Delinquency % | 2.40% | 2.40%
Settled Whole Loans | Single-family rental loans | Current |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | $ 1,555,427 | $ 1,442,095
Settled Whole Loans | Single-family rental loans | 30-59 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 10,893 | 8,431
Settled Whole Loans | Single-family rental loans | 60-89 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 3,766 | 7,978
Settled Whole Loans | Single-family rental loans | 90 or more |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 33,997 | 27,463
Settled Whole Loans | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Purchased Performing Loans | 75,347 | 82,884
Unpaid Principal Balance (“UPB”) | $ 82,695 | $ 90,843
Weighted Average Coupon | 4.01% | 3.31%
Weighted Average Term to Maturity (Months) | 147 months | 151 months
Weighted Average LTV Ratio | 29.00% | 30.00%
Weighted Average Original FICO | 726 | 714
60+ Delinquency % | 3.80% | 5.90%
Settled Whole Loans | Seasoned performing loans | Current |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | $ 78,138 | $ 84,514
Settled Whole Loans | Seasoned performing loans | 30-59 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 1,378 | 993
Settled Whole Loans | Seasoned performing loans | 60-89 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 43 | 937
Settled Whole Loans | Seasoned performing loans | 90 or more |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 3,136 | 4,399
Settled Whole Loans | Agency eligible investor loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Purchased Performing Loans | 58,068 | 51,094
Unpaid Principal Balance (“UPB”) | $ 70,075 | $ 61,816
Weighted Average Coupon | 3.44% | 3.44%
Weighted Average Term to Maturity (Months) | 338 months | 344 months
Weighted Average LTV Ratio | 67.00% | 68.00%
Weighted Average Original FICO | 757 | 757
60+ Delinquency % | 1.40% | 0.00%
Settled Whole Loans | Agency eligible investor loans | Current |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | $ 69,082 | $ 61,816
Settled Whole Loans | Agency eligible investor loans | 30-59 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 0 | 0
Settled Whole Loans | Agency eligible investor loans | 60-89 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 765 | 0
Settled Whole Loans | Agency eligible investor loans | 90 or more |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 228 | 0
Settled Whole Loans | Purchased Credit Deteriorated Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Purchased Performing Loans | 428,157 | 448,887
Unpaid Principal Balance (“UPB”) | $ 528,843 | $ 554,907
Weighted Average Coupon | 4.75% | 4.66%
Weighted Average Term to Maturity (Months) | 272 months | 277 months
Weighted Average LTV Ratio | 62.00% | 63.00%
60+ Delinquency % | 16.70% | 18.70%
Settled Whole Loans | Purchased Credit Deteriorated Loans | Current |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | $ 394,413 | $ 403,042
Settled Whole Loans | Purchased Credit Deteriorated Loans | 30-59 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 45,891 | 48,107
Settled Whole Loans | Purchased Credit Deteriorated Loans | 60-89 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 13,721 | 16,270
Settled Whole Loans | Purchased Credit Deteriorated Loans | 90 or more |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 74,818 | 87,488
Settled Whole Loans | Purchased Non-Performing Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Purchased Performing Loans | 739,712 | 796,109
Unpaid Principal Balance (“UPB”) | $ 825,289 | $ 884,257
Weighted Average Coupon | 5.12% | 5.01%
Weighted Average Term to Maturity (Months) | 274 months | 277 months
Weighted Average LTV Ratio | 67.00% | 68.00%
60+ Delinquency % | 34.30% | 39.60%
Settled Whole Loans | Purchased Non-Performing Loans | Current |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | $ 448,977 | $ 444,045
Settled Whole Loans | Purchased Non-Performing Loans | 30-59 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 93,267 | 89,623
Settled Whole Loans | Purchased Non-Performing Loans | 60-89 |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 32,569 | 40,554
Settled Whole Loans | Purchased Non-Performing Loans | 90 or more |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Aging by UPB | 250,476 | 310,035
Settled Whole Loans | Residential whole loans, total or weighted average |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Purchased Performing Loans | 8,139,786 | 7,518,739
Unpaid Principal Balance (“UPB”) | $ 8,788,168 | $ 8,180,950
Weighted Average Coupon | 5.81% | 5.64%
Weighted Average Term to Maturity (Months) | 256 months | 272 months
60+ Delinquency % | 6.60% | 8.10%
Settled Whole Loans | Certain rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Weighted Average LTV Ratio | 69.00% | 70.00%
Transitional loans | Certain rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Securitization of eligible investor loans | $ 296,100 | $ 223,200

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