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Fair Value of Financial Instruments (Fair Value Methodology) (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
Nonperforming |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Purchased Loans | $ 1,168,185 | $ 1,216,637
Purchases excluded from level 2 fair value | 266 | 265
Performing |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Purchased Loans | 835,177 |
Purchases excluded from level 2 fair value | 131,300 |
Discounted cash flow | Nonperforming |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Purchased Loans | 773,449 | 789,576
Discounted cash flow | Performing |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Purchased Loans | 832,928 |
Liquidation model | Nonperforming |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Purchased Loans | 394,736 | 427,061
Simple average amount | 410 | $ 380
Liquidation model | Performing |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Purchased Loans | $ 2,249 |
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 | 4.30% | 1.80%
Liquidation timeline (in years) | 8 months 12 days | 9 months 18 days
Fair Value Inputs, Value of Underlying Property | $ 5 | $ 12
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 | 6.80% |
Liquidation timeline (in years) | 2 years |
Fair Value Inputs, Value of Underlying Property | $ 124 |
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 | 12.10% | 6.50%
Liquidation timeline (in years) | 4 years 9 months 18 days | 4 years 9 months 18 days
Fair Value Inputs, Value of Underlying Property | $ 3,704 | $ 4,500
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 | 8.70% |
Liquidation timeline (in years) | 3 years 3 months 18 days |
Fair Value Inputs, Value of Underlying Property | $ 1,750 |
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 | 0.008 |
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 | 0.118 | 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 | 0.073 |
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 | 0.035 | 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 | 0.031 |
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 | 0.075 |
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 | 0.075 |
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 | 0.080 | 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 | 0.075 |
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 | 0.439 | 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 | 0.461 |
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 | 0.140 | 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 | 0.202 |
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 | 7.00% | 3.60%
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 | 8.10% |
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 | 0.491 | 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 | 0.221 |
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 | 0.041 | 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 | 0.004 |
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 9 months 18 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 6 months |
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 | 0.120 | 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 | 0.092 |
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 | $ 765 | $ 729
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 | $ 1,048 |

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