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Fair Value of Financial Instruments - Schedule of Changes in Unrealized Gains (Losses) Included in Earnings for Level 3 Assets and Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Assets |  |  |  |
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Unrealized (losses) gains, net | Unrealized (losses) gains, net | Unrealized (losses) gains, net | Unrealized (losses) gains, net
Liabilities |  |  |  |
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Unrealized (losses) gains, net | Unrealized (losses) gains, net | Unrealized (losses) gains, net | Unrealized (losses) gains, net
Level 3 | Consolidated SLST | VIE, Primary Beneficiary |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | $ (1,306) | $ (23,332) | $ (800) | $ (7,525)
Residential loans | Level 3 |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | (1,912) | (449) | (10,592) | (4,344)
Residential Loans Held in Securitization Trusts | Level 3 |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | (6,359) | (8,169) | (7,156) | 21,497
Multi-Family Loans | Level 3 |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | (16) | 334 | (4,794) | 779
Equity investments | Level 3 |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | (419) | (1,083) | (6,581) | (3,675)
Equity investments in disposal group held for sale | Level 3 |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | 0 | (2,375) | 0 | (1,315)
Collateralized Debt Obligations | Level 3 | Consolidated SLST | VIE, Primary Beneficiary |  |  |  |
Liabilities |  |  |  |
Unrealized gains (losses) | $ 1,848 | $ 11,004 | $ 1,306 | $ (2,504)

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