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Use of Special Purpose Entities (SPE) and Variable Interest Entities (VIE) - Classification and Carrying Value of Unconsolidated VIEs (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Variable Interest Entity [Line Items] |  |  |
Total assets | [1] | $ 6,240,745 | $ 5,658,301
Equity Method Investment, Nonconsolidated Investee or Group of Investees |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 663,049 | 861,402
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Total Unconsolidated Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 278,936 | 401,005
Equity Method Investment, Nonconsolidated Investee or Group of Investees | ABS |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 856 | 39,679
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Non-Agency RMBS |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 29,290 | 30,924
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Preferred equity investments in multi-family properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 239,780 | 300,819
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Joint venture equity investments in multi-family properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 9,010 | 10,440
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Equity investments in entities that invest in residential properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  |  | 19,143
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Multi-family loans | Total Unconsolidated Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 87,534 | 120,021
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Multi-family loans | ABS |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 | 0
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Multi-family loans | Non-Agency RMBS |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 |
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Multi-family loans | Preferred equity investments in multi-family properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 87,534 | 120,021
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Multi-family loans | Joint venture equity investments in multi-family properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 | 0
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Multi-family loans | Equity investments in entities that invest in residential properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  |  | 0
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Investment securities available for sale, at fair value | Total Unconsolidated Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 30,146 | 70,603
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Investment securities available for sale, at fair value | ABS |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 856 | 39,679
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Investment securities available for sale, at fair value | Non-Agency RMBS |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 29,290 | 30,924
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Investment securities available for sale, at fair value | Preferred equity investments in multi-family properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 | 0
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Investment securities available for sale, at fair value | Joint venture equity investments in multi-family properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 | 0
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Investment securities available for sale, at fair value | Equity investments in entities that invest in residential properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  |  | 0
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Equity investments | Total Unconsolidated Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 152,246 | 210,381
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Equity investments | ABS |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 | 0
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Equity investments | Non-Agency RMBS |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 | 0
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Equity investments | Preferred equity investments in multi-family properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 152,246 | 180,798
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Equity investments | Joint venture equity investments in multi-family properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 | 10,440
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Equity investments | Equity investments in entities that invest in residential properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  |  | $ 19,143
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Assets of disposal group held for sale | Total Unconsolidated Variable Interest Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 9,010 |
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Assets of disposal group held for sale | ABS |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 |
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Assets of disposal group held for sale | Non-Agency RMBS |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 |
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Assets of disposal group held for sale | Preferred equity investments in multi-family properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | 0 |
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Assets of disposal group held for sale | Joint venture equity investments in multi-family properties |  |  |
Variable Interest Entity [Line Items] |  |  |
Total assets |  | $ 9,010 |
[1] | Our consolidated balance sheets include assets and liabilities of consolidated variable interest entities (“VIEs”) as the Company is the primary beneficiary of these VIEs. As of December 31, 2022 and December 31, 2021, assets of consolidated VIEs totaled $4,261,097 and $2,940,513, respectively, and the liabilities of consolidated VIEs totaled $3,403,257 and $2,235,665, respectively. See Note 7 for further discussion.

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