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Fair Value of Financial Instruments - Level 3 Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Level 2 |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Transfer to Level 2 | $ 654,700 |
Recurring basis | Level 3 | Residential whole loans, at fair value |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | 1,216,902 | $ 1,381,583
Purchases and originations | 4,367,423 | 0
Draws | 53,599 | 0
Changes in fair value recorded in Net gain on residential whole loans measured at fair value through earnings | 16,243 | 17,204
Repayments | (295,790) | (92,733)
Loan sales and repurchases | (2,023) | (18,530)
Transfer to REO | (51,005) | (70,622)
Transfer to Level 2 | (1,082,765) | 0
Balance at end of period | $ 4,222,584 | $ 1,216,902

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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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