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Residential Whole Loans (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Receivables [Abstract] |  |
Total residential whole loans | $ 7,000,000 | $ 7,400,000
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Valuation adjustment on loans held for sale | 70,181 |
Non-QM Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, sale | 659,900 |
Gain on sale of financing receivable | 145,800 |
Valuation adjustment on loans held for sale | 70,181 |
Purchased Performing Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable, nonaccrual | 134,400 | $ 99,900
Purchased Credit Deteriorated Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Valuation adjustment on loans held for sale | 0 |
Financing receivable, nonaccrual | $ 99,000 |

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