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Use of Special Purpose Entities and Variable Interest Entities (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2021 | Dec. 31, 2020
Variable Interest Entity [Line Items] |  |  |  |
Total residential whole loans | $ 5,600,000 |  | $ 5,600,000 | $ 5,300,000
Asset-backed Securities, Securitized Loans and Receivables |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Proceeds from issuance of debt |  | $ 1,853,408 | 2,511,087 |
Residential whole loans | 2,300,000 |  | 2,300,000 | 1,800,000
Securitized debt | 2,000,000 |  | 2,000,000 | 1,500,000
Asset-backed Securities, Securitized Loans and Receivables | Other Assets |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Real estate owned at fair value | 38,400 |  | $ 38,400 | $ 49,500
Senior Bonds |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
Proceeds from issuance of debt | 805,900 |  |  |
Proceed from debt net of offering expenses and underwriting discount | $ 805,900 |  |  |

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- Definition Loans, Including Fair Value Loans, Credit Impaired Loans and Other Loans at Carrying Value + References No definition available. + Details
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- Definition Residential Whole Loans, at Fair Value and Carrying Value + References No definition available. + Details
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- Definition Secured financing other than securities sold under agreements to repurchase and securities loaned. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 15 -Paragraph 83 -URI http://asc.fasb.org/extlink&oid=125514181&loc=d3e34841-113949 + Details
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- Definition The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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