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Summary of Significant Accounting Policies - Schedule of Adjustments for Adoption of ASU 2019-05 (Details) - USD ($) $ in Thousands | Jan. 01, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Investments in unconsolidated entities | $ 107,477 | $ 189,965 |  | $ 73,466 |
Preferred equity and mezzanine loan investments | 182,465 | 180,045 |  | 165,555 |
Receivables and other assets | 3,620 | 169,214 |  | 114,821 |
Total Assets | 502,033 | 23,483,369 | [1] | 14,737,638 | [1]
Accumulated deficit | (136,579) | (148,863) |  | (103,178) |
Total Stockholders' Equity | (136,579) | 2,205,733 |  | 1,179,389 |
Distressed and other residential mortgage loans, net |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Distressed and other residential mortgage loans, net | 208,471 | 202,756 |  | $ 285,261 |
ASU 2019-05 |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Investments in unconsolidated entities | 1,394 |  |  |  |
Preferred equity and mezzanine loan investments | 2,420 |  |  |  |
Receivables and other assets | 2,755 |  |  |  |
Total Assets | 12,284 |  |  |  |
Accumulated deficit | 12,284 |  |  |  |
Total Stockholders' Equity | 12,284 |  |  |  |
ASU 2019-05 | Distressed and other residential mortgage loans, net |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Distressed and other residential mortgage loans, net | $ 5,715 |  |  |  |
Previously Reported |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Investments in unconsolidated entities |  | 106,083 |  |  |
Preferred equity and mezzanine loan investments |  | 180,045 |  |  |
Receivables and other assets |  | 865 |  |  |
Total Assets |  | 489,749 |  |  |
Accumulated deficit |  | (148,863) |  |  |
Total Stockholders' Equity |  | (148,863) |  |  |
Previously Reported | Distressed and other residential mortgage loans, net |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Distressed and other residential mortgage loans, net |  | $ 202,756 |  |  |
[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, 2019 and December 31, 2018, assets of consolidated VIEs totaled $19,270,384 and $11,984,374, respectively, and the liabilities of consolidated VIEs totaled $17,878,314 and $11,191,736, respectively. See Note 9 for further discussion.

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