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Fair Value of Financial Instruments - Level 3 Liabilities (Details) - Level 3 - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Weighted Average | Residential whole loan | Liquidation timeline (in years) | Liquidation model |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Fair Value Inputs, Liquidation Timeline |  |  | 1 year 9 months 18 days |  | 1 year 10 months 24 days
Minimum | Residential whole loan | Liquidation timeline (in years) | Liquidation model |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Fair Value Inputs, Liquidation Timeline |  |  | 9 months 18 days |  | 1 month 6 days
Maximum | Residential whole loan | Liquidation timeline (in years) | Liquidation model |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Fair Value Inputs, Liquidation Timeline |  |  | 4 years 6 months |  | 4 years 6 months
Recurring basis | Agreements with Non-mark-to-market Collateral Provisions |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Balance at beginning of period | $ 399,049 | $ 526,623 | $ 469,424 | $ 578,879 | $ 578,879
Issuances | 44,798 | 126,565 | 112,740 | 272,395 |
Payment of principal | (66,595) | (213,082) | (204,912) | (411,168) |
Change in unrealized losses | 0 | 0 | 0 | 0 |
Balance at end of period | 377,252 | 440,106 | 377,252 | 440,106 | 469,424
Recurring basis | Agreements with Mark-to-market Collateral Provisions |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Balance at beginning of period | 176,759 | 680,708 | 178,864 | 884,495 | 884,495
Issuances | 114,601 | 9,463 | 114,601 | 22,018 |
Payment of principal | (1,132) | (137,009) | (3,237) | (353,351) |
Change in unrealized losses | 0 | 0 | 0 | 0 |
Balance at end of period | $ 290,228 | $ 553,162 | $ 290,228 | $ 553,162 | $ 178,864

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- Definition Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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