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Fair Value of Financial Instruments (Fair Value Methodology) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Purchased Loans |  | $ 1,139,743 | $ 1,216,637
Purchases excluded from level 2 fair value |  | 1,100 | 265
Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Purchased Loans |  | 2,790,512 |
Purchases excluded from level 2 fair value |  | 162,200 |
Discounted cash flow | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Purchased Loans |  | 774,666 | 789,576
Discounted cash flow | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Purchased Loans |  | 2,780,698 |
Liquidation model | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Purchased Loans |  | 365,077 | 427,061
Simple average amount |  | 432 | $ 380
Liquidation model | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Purchased Loans |  | $ 9,814 |
Residential whole loans | Level 3 | Liquidation model | Minimum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value Inputs, Annual Change in Home Prices | 1.80% | 4.60% |
Liquidation timeline (in years) | 9 months 18 days | 1 month 6 days |
Fair Value Inputs, Value of Underlying Property | $ 12 | $ 10 |
Residential whole loans | Level 3 | Liquidation model | Minimum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value Inputs, Annual Change in Home Prices |  | 0.00% |
Liquidation timeline (in years) |  | 1 year |
Fair Value Inputs, Value of Underlying Property |  | $ 50 |
Residential whole loans | Level 3 | Liquidation model | Maximum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value Inputs, Annual Change in Home Prices | 6.50% | 27.30% |
Liquidation timeline (in years) | 4 years 9 months 18 days | 4 years 9 months 18 days |
Fair Value Inputs, Value of Underlying Property | $ 4,500 | $ 3,995 |
Residential whole loans | Level 3 | Liquidation model | Maximum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value Inputs, Annual Change in Home Prices |  | 12.40% |
Liquidation timeline (in years) |  | 4 years 4 months 24 days |
Fair Value Inputs, Value of Underlying Property |  | $ 2,075 |
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.025 | 0.033
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.009 |
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.115 | 0.080
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.505 |
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.034 | 0.039
Discount rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.033 |
Discount rate | Residential whole loans | Level 3 | Liquidation model | Minimum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.067 | 0.067
Discount rate | Residential whole loans | Level 3 | Liquidation model | Minimum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.070 |
Discount rate | Residential whole loans | Level 3 | Liquidation model | Maximum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.500 | 0.500
Discount rate | Residential whole loans | Level 3 | Liquidation model | Maximum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.070 |
Discount rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.081 | 0.081
Discount rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.070 |
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.000 | 0.000
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.000 |
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.438 | 0.176
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.501 |
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.122 | 0.054
Prepayment rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.184 |
Prepayment rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value Inputs, Annual Change in Home Prices | 3.60% | 9.30% |
Prepayment rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value Inputs, Annual Change in Home Prices |  | 7.80% |
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.000 | 0.000
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.000 |
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.313 | 0.477
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.218 |
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.040 | 0.041
Default rate | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.003 |
Default rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Liquidation timeline (in years) | 1 year 9 months 18 days | 1 year 8 months 12 days |
Default rate | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Liquidation timeline (in years) |  | 2 years 2 months 12 days |
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.000 | 0.000
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Minimum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.000 |
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 1.000 | 1.000
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Maximum | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.100 |
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.118 | 0.127
Loss severity | Residential whole loans | Level 3 | Discounted cash flow | Weighted Average | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Measurement input |  | 0.089 |
Loss severity | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Nonperforming |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value Inputs, Value of Underlying Property | $ 729 | $ 788 |
Loss severity | Residential whole loans | Level 3 | Liquidation model | Weighted Average | Performing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair Value Inputs, Value of Underlying Property |  | $ 884 |

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- Definition Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period At Acquisition At Fair Value, Level 3, Excluding Loan Purchase Price + References No definition available. + Details
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- Definition Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Acquired During Period At Acquisition At Fair Value, Purchases Excluded from Level 3 Fair Value Methodology Disclosures + References No definition available. + Details
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