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Fair Value of Financial Instruments - Changes in Unrealized Gains (Losses) Included in Earnings for Level 3 Assets and Liabilities (Details) - Level 3 - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Collateralized Debt Obligations | Consolidated SLST | VIE, Primary Beneficiary |  |  |  |
Liabilities |  |  |  |
Unrealized gains (losses) | $ 25,263 | $ (1,985) | $ 83,151 | $ 35,905
Residential loans | Consolidated SLST | VIE, Primary Beneficiary |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | (33,188) | 6,287 | (110,631) | (12,585)
Residential loans | Residential loans |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | (57,296) | 7,881 | (90,749) | 21,476
Residential loans | Residential Loans Held in Securitization Trusts |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | (66,697) | 12,791 | (150,664) | 31,015
Multi-family loans | Preferred Equity and Mezzanine Loan Investments |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | (2,490) | 538 | (2,117) | 1,203
Equity investments | Equity investments |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | (6,387) | (294) | (4,581) | 634
Equity investments in disposal group held for sale | Equity investments in disposal group held for sale |  |  |  |
Assets |  |  |  |
Unrealized gains (losses) | $ (1,054) | $ 0 | $ (504) | $ 0

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- Definition Amount of unrealized gain (loss) recognized in income from asset 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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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