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Schedule IV - Mortgage Loans on Real Estate (Details) $ in Thousands | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($) | Sep. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Allowance for credit loss | $ 39,447 | $ 86,833 | $ 44,102 | $ 54,261 | $ 63,244 | $ 106,246 | $ 136,589 | $ 218,011 | $ 3,025
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] |  |  |  |  |  |  |  |  |
Premium amortization/discount accretion, net | 14,273 |  |  |  |  |  |  |  |
Carrying value |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Allowance for credit loss | $ 39,400 |  |  |  |  |  |  |  |
Residential whole loans, at fair value | Carrying value |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Number | loan | 24,095 |  |  |  |  |  |  |  |
Balance Sheet Reported Amount | $ 7,952,438 |  |  |  |  |  |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest | 800,143 |  |  |  |  |  |  |  |
Tax basis of loans | 5,200,000 |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] |  |  |  |  |  |  |  |  |
Residential whole loans, at fair value, beginning balance | 5,325,401 |  |  |  |  |  |  |  |
Purchases | 4,591,645 |  |  |  |  |  |  |  |
Changes in fair value recorded in Net gain on residential whole loans measured at fair value through earnings | 16,243 |  |  |  |  |  |  |  |
Repayments | (1,999,022) |  |  |  |  |  |  |  |
Provision for loan loss | 47,386 |  |  |  |  |  |  |  |
Loan sales and repurchases | (7,310) |  |  |  |  |  |  |  |
Transfer to REO | (75,616) |  |  |  |  |  |  |  |
Residential whole loans, at fair value, ending balance | $ 7,913,000 | $ 5,325,401 |  |  |  |  |  |  |
Original loan balance $0 - $149,999 | Residential whole loans, at fair value | Carrying value |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Number | loan | 6,872 |  |  |  |  |  |  |  |
Balance Sheet Reported Amount | $ 601,637 |  |  |  |  |  |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest | $ 80,808 |  |  |  |  |  |  |  |
Original loan balance $0 - $149,999 | Residential whole loans, at fair value | Carrying value | Minimum |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate | 0.00% |  |  |  |  |  |  |  |
Original loan balance $0 - $149,999 | Residential whole loans, at fair value | Carrying value | Maximum |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate | 16.00% |  |  |  |  |  |  |  |
Original loan balance $150,000 - $299,999 | Residential whole loans, at fair value | Carrying value |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Number | loan | 7,875 |  |  |  |  |  |  |  |
Balance Sheet Reported Amount | $ 1,534,048 |  |  |  |  |  |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest | $ 183,576 |  |  |  |  |  |  |  |
Original loan balance $150,000 - $299,999 | Residential whole loans, at fair value | Carrying value | Minimum |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate | 0.00% |  |  |  |  |  |  |  |
Original loan balance $150,000 - $299,999 | Residential whole loans, at fair value | Carrying value | Maximum |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate | 13.49% |  |  |  |  |  |  |  |
Original loan balance $300,000 - $449,999 | Residential whole loans, at fair value | Carrying value |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Number | loan | 4,184 |  |  |  |  |  |  |  |
Balance Sheet Reported Amount | $ 1,408,772 |  |  |  |  |  |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest | $ 173,855 |  |  |  |  |  |  |  |
Original loan balance $300,000 - $449,999 | Residential whole loans, at fair value | Carrying value | Minimum |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate | 0.00% |  |  |  |  |  |  |  |
Original loan balance $300,000 - $449,999 | Residential whole loans, at fair value | Carrying value | Maximum |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate | 11.65% |  |  |  |  |  |  |  |
Original loan balance greater than $449,999 | Residential whole loans, at fair value | Carrying value |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Number | loan | 5,164 |  |  |  |  |  |  |  |
Balance Sheet Reported Amount | $ 4,407,981 |  |  |  |  |  |  |  |
Principal Amount of Loans Subject to Delinquent Principal or Interest | $ 361,904 |  |  |  |  |  |  |  |
Original loan balance greater than $449,999 | Residential whole loans, at fair value | Carrying value | Minimum |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate | 0.25% |  |  |  |  |  |  |  |
Original loan balance greater than $449,999 | Residential whole loans, at fair value | Carrying value | Maximum |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate | 10.20% |  |  |  |  |  |  |  |

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- Definition The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=123409700&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 + Details
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