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Residential Whole Loans (Residential Whole Loans, at Carrying Value - Additional Information) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Sep. 30, 2020 | Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Purchased performing loans | $ 3,287,689 |  |  | $ 3,521,624
Purchased Credit Deteriorated Loans | $ 644,611 |  |  | 673,708
Weighted Average LTV Ratio | 80.00% |  |  |
Non-QM Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Purchased performing loans | $ 2,243,444 |  |  | 2,357,185
Rehabilitation loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Purchased performing loans | 464,385 |  |  | 581,801
Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Purchased performing loans | 451,791 |  |  | 446,374
Seasoned performing loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Purchased performing loans | $ 128,069 |  |  | 136,264
90 or more |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Weighted Average LTV Ratio | 82.56% | 86.78% |  |
90 or more | Non-QM Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unpaid Principal Balance (“UPB”) | $ 132,732 |  |  | 144,681
90 or more | Rehabilitation loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unpaid Principal Balance (“UPB”) | 136,991 |  |  | 136,347
90 or more | Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unpaid Principal Balance (“UPB”) | 24,052 |  |  | 20,233
90 or more | Seasoned performing loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Unpaid Principal Balance (“UPB”) | 9,449 |  |  | 8,823
Settled Whole Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Residential whole loans, at carrying value, total or weighted average | 3,869,056 |  |  | 4,108,499
Amortized Cost Basis | 3,932,300 |  |  | 4,195,332
Unpaid Principal Balance (“UPB”) | $ 3,986,725 |  |  | $ 4,249,418
Weighted Average Coupon | 5.72% |  |  | 5.77%
Weighted Average Term to Maturity (Months) | 288 months |  | 282 months |
Settled Whole Loans | Non-QM Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Purchased performing loans | $ 2,228,899 |  |  | $ 2,336,117
Amortized Cost Basis | 2,243,444 |  |  | 2,357,185
Unpaid Principal Balance (“UPB”) | $ 2,183,662 |  |  | $ 2,294,086
Weighted Average Coupon | 5.82% |  |  | 5.84%
Weighted Average Term to Maturity (Months) | 350 months |  | 351 months |
Weighted Average LTV Ratio | 64.00% |  | 64.00% |
Weighted Average FICO Scores | 713 |  | 712 |
Settled Whole Loans | Rehabilitation loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Purchased performing loans | $ 450,717 |  |  | $ 563,430
Amortized Cost Basis | 464,385 |  |  | 581,801
Unpaid Principal Balance (“UPB”) | $ 464,385 |  |  | $ 581,801
Weighted Average Coupon | 7.23% |  |  | 7.29%
Weighted Average Term to Maturity (Months) | 3 months |  | 3 months |
Weighted Average LTV Ratio | 64.00% |  | 63.00% |
Weighted Average FICO Scores | 719 |  | 719 |
Settled Whole Loans | Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Purchased performing loans | $ 449,045 |  |  | $ 442,456
Amortized Cost Basis | 451,791 |  |  | 446,374
Unpaid Principal Balance (“UPB”) | $ 447,072 |  |  | $ 442,208
Weighted Average Coupon | 6.29% |  |  | 6.32%
Weighted Average Term to Maturity (Months) | 320 months |  | 324 months |
Weighted Average LTV Ratio | 70.00% |  | 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 | $ 128,003 |  |  | $ 136,157
Amortized Cost Basis | 128,069 |  |  | 136,264
Unpaid Principal Balance (“UPB”) | $ 139,847 |  |  | $ 149,004
Weighted Average Coupon | 3.12% |  |  | 3.30%
Weighted Average Term to Maturity (Months) | 169 months |  | 171 months |
Weighted Average LTV Ratio | 39.00% |  | 40.00% |
Weighted Average FICO Scores | 723 |  | 723 |
Settled Whole Loans | Purchased credit impaired loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Purchased Credit Deteriorated Loans | $ 612,392 |  |  | $ 630,339
Amortized Cost Basis | 644,611 |  |  | 673,708
Unpaid Principal Balance (“UPB”) | $ 751,759 |  |  | $ 782,319
Weighted Average Coupon | 4.49% |  |  | 4.46%
Weighted Average Term to Maturity (Months) | 285 months |  | 287 months |
Weighted Average LTV Ratio | 75.00% |  | 76.00% |
Settled Whole Loans | Certain Rehabilitation Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Purchased performing loans | $ 151,700 |  |  | $ 189,900
Weighted Average LTV Ratio | 68.00% |  | 69.00% |
Settled Whole Loans | Current | Non-QM Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | $ 1,975,505 |  |  | 2,099,134
Settled Whole Loans | Current | Rehabilitation loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 293,931 |  |  | 390,706
Settled Whole Loans | Current | Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 421,258 |  |  | 415,386
Settled Whole Loans | Current | Seasoned performing loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 115,315 |  |  | 124,877
Settled Whole Loans | 30-59 | Non-QM Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 89,767 |  |  | 73,163
Settled Whole Loans | 30-59 | Rehabilitation loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 21,296 |  |  | 29,315
Settled Whole Loans | 30-59 | Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 4,507 |  |  | 6,652
Settled Whole Loans | 30-59 | Seasoned performing loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 2,445 |  |  | 2,186
Settled Whole Loans | 60-89 | Non-QM Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 42,912 |  |  | 36,501
Settled Whole Loans | 60-89 | Rehabilitation loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 12,167 |  |  | 25,433
Settled Whole Loans | 60-89 | Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 1,935 |  |  | 3,948
Settled Whole Loans | 60-89 | Seasoned performing loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 1,589 |  |  | 1,170
Settled Whole Loans | 90 or more | Non-QM Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 135,260 |  |  | 148,387
Settled Whole Loans | 90 or more | Rehabilitation loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 136,991 |  |  | 136,347
Settled Whole Loans | 90 or more | Single-family rental loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 24,091 |  |  | 20,388
Settled Whole Loans | 90 or more | Seasoned performing loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | 8,721 |  |  | 8,031
Settled Whole Loans | 90 or more | Purchased credit impaired loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Amortized Cost Basis | $ 117,509 |  |  | $ 119,621

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