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Use of Special Purpose Entities and Variable Interest Entities (Narrative) (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Variable Interest Entity [Line Items] |  |  |
Residential whole loans, carrying value | [1],[2] | $ 5,934,042 | $ 6,069,370
Residential whole loans, at fair value | [2] | 1,243,792 | 1,381,583
Securitized debt |  | 533,733 | 570,952
Residential whole loans, net |  | 5,716,031 | 6,066,345
Total residential whole loans |  | 7,000,000 | 7,400,000
Asset-backed Securities, Securitized Loans and Receivables |  |  |
Variable Interest Entity [Line Items] |  |  |
Residential whole loans, carrying value |  | 185,900 | 186,400
Residential whole loans, at fair value |  | 516,400 | 567,400
Securitized debt |  | 533,733 | 570,952
Asset-backed Securities, Securitized Loans and Receivables | Other Assets |  |  |
Variable Interest Entity [Line Items] |  |  |
Real estate owned at fair value |  | $ 129,100 | $ 137,800
[1] | Includes Non-QM loans held-for-sale with an amortized cost of $965.5 million and a net carrying value of $895.3 million at March 31, 2020.
[2] | Includes approximately $185.9 million and $186.4 million of Residential whole loans, at carrying value and $516.4 million and $567.4 million of Residential whole loans, at fair value transferred to consolidated variable interest entities (“VIEs”) at March 31, 2020 and December 31, 2019, respectively. Such assets can be used only to settle the obligations of each respective VIE

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- Definition Fair value at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118938799&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 + Details
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