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v3.21.1

Use of Special Purpose Entities and Variable Interest Entities (Loan Securitization Transaction) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Variable Interest Entity [Line Items] |  |
Excluded principal balance associated with certain REO properties | $ 41,600 |
Asset-backed Securities, Securitized Loans and Receivables |  |
Variable Interest Entity [Line Items] |  |
Aggregate fair value | 2,108,950 | $ 2,232,561
Outstanding amount of Senior Bonds, at carrying value | 795,912 | 645,027
Outstanding amount of Senior Bonds, at fair value | 753,008 | 869,482
Outstanding amount of Senior Bonds, total | $ 1,548,920 | $ 1,514,509
Weighted average interest rate | 1.71% | 2.11%
Weighted average contractual maturity of Senior Bonds | 42 years | 41 years
Cash received | $ 1,852,989 | $ 1,853,408
Debt issuance cost | 4,100 | 3,200
Senior notes |  |
Variable Interest Entity [Line Items] |  |
Cash received | 437,900 |
Senior notes | Asset-backed Securities, Securitized Loans and Receivables |  |
Variable Interest Entity [Line Items] |  |
Principal amount of Securitized debt | 1,853,013 | 1,862,068
Proceeds from Senior bond sold with Step up feature | $ 505,100 | 568,700
Debt instrument, coupon step-up period | 36 months |
Senior notes | Asset-backed Securities, Securitized Loans and Receivables | Minimum |  |
Variable Interest Entity [Line Items] |  |
Debt instrument, basis spread on variable rate | 1.00% |
Senior notes | Asset-backed Securities, Securitized Loans and Receivables | Maximum |  |
Variable Interest Entity [Line Items] |  |
Debt instrument, basis spread on variable rate | 3.00% |
Senior Support Certificates | Asset-backed Securities, Securitized Loans and Receivables |  |
Variable Interest Entity [Line Items] |  |
Principal amount of Securitized debt | $ 225,729 | $ 268,548

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