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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, 2021 | Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Weighted Average LTV Ratio | 80.00% |
Settled Whole Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Residential whole loans, at carrying value, total or weighted average | $ 3,416,124 | $ 4,108,499
Amortized Cost Basis | 3,470,385 | 4,195,332
Unpaid Principal Balance (“UPB”) | $ 3,528,066 | $ 4,249,418
Weighted Average Coupon | 5.67% | 5.77%
Weighted Average Term to Maturity (Months) | 289 months | 282 months
Settled Whole Loans | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased performing loans | $ 1,948,763 | $ 2,336,117
Amortized Cost Basis | 1,960,855 | 2,357,185
Unpaid Principal Balance (“UPB”) | $ 1,908,905 | $ 2,294,086
Weighted Average Coupon | 5.81% | 5.84%
Weighted Average Term to Maturity (Months) | 347 months | 351 months
Weighted Average LTV Ratio | 63.00% | 64.00%
Weighted Average FICO Scores | 712 | 712
Settled Whole Loans | Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased performing loans | $ 352,859 | $ 563,430
Amortized Cost Basis | 364,463 | 581,801
Unpaid Principal Balance (“UPB”) | $ 364,463 | $ 581,801
Weighted Average Coupon | 7.21% | 7.29%
Weighted Average Term to Maturity (Months) | 5 months | 3 months
Weighted Average LTV Ratio | 65.00% | 63.00%
Weighted Average FICO Scores | 723 | 719
Settled Whole Loans | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased performing loans | $ 415,184 | $ 442,456
Amortized Cost Basis | 417,544 | 446,374
Unpaid Principal Balance (“UPB”) | $ 413,060 | $ 442,208
Weighted Average Coupon | 6.29% | 6.32%
Weighted Average Term to Maturity (Months) | 322 months | 324 months
Weighted Average LTV Ratio | 69.00% | 70.00%
Weighted Average FICO Scores | 730 | 730
Settled Whole Loans | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased performing loans | $ 118,309 | $ 136,157
Amortized Cost Basis | 118,366 | 136,264
Unpaid Principal Balance (“UPB”) | $ 129,536 | $ 149,004
Weighted Average Coupon | 2.96% | 3.30%
Weighted Average Term to Maturity (Months) | 167 months | 171 months
Weighted Average LTV Ratio | 39.00% | 40.00%
Weighted Average FICO Scores | 722 | 723
Settled Whole Loans | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Residential whole loans, at carrying value | $ 581,009 | $ 630,339
Amortized Cost Basis | 609,157 | 673,708
Unpaid Principal Balance (“UPB”) | $ 712,102 | $ 782,319
Weighted Average Coupon | 4.54% | 4.46%
Weighted Average Term to Maturity (Months) | 284 months | 287 months
Weighted Average LTV Ratio | 71.00% | 76.00%
Settled Whole Loans | Certain rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Purchased performing loans | $ 134,200 | $ 189,900
Weighted Average LTV Ratio | 69.00% | 69.00%
Settled Whole Loans | Current | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | $ 1,725,889 | $ 2,099,134
Settled Whole Loans | Current | Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 226,865 | 390,706
Settled Whole Loans | Current | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 386,091 | 415,386
Settled Whole Loans | Current | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 107,762 | 124,877
Settled Whole Loans | 30-59 | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 58,059 | 73,163
Settled Whole Loans | 30-59 | Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 17,150 | 29,315
Settled Whole Loans | 30-59 | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 5,858 | 6,652
Settled Whole Loans | 30-59 | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 943 | 2,186
Settled Whole Loans | 60-89 | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 36,856 | 36,501
Settled Whole Loans | 60-89 | Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 11,506 | 25,433
Settled Whole Loans | 60-89 | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 3,000 | 3,948
Settled Whole Loans | 60-89 | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 538 | 1,170
Settled Whole Loans | 90 or more | Non-QM loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 140,051 | 148,387
Settled Whole Loans | 90 or more | Rehabilitation loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 108,942 | 136,347
Settled Whole Loans | 90 or more | Single-family rental loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 22,595 | 20,388
Settled Whole Loans | 90 or more | Seasoned performing loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | 9,123 | 8,031
Settled Whole Loans | 90 or more | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortized Cost Basis | $ 105,487 | $ 119,621

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