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Fair Value of Financial Instruments (Level 3 Assets) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Residential whole loans held at fair value for which the closing price of the purchase transaction had not occurred |  | $ 70,600
Recurring basis | Level 3 | Residential Whole Loans, at Fair Value |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period | $ 1,381,583 | 1,471,263
Purchases and capitalized advances | 3,520 | 130,089
Changes in fair value recorded in Net gain on residential whole loans measured at fair value through earnings | (74,556) | (1,060)
Collection of principal, net of liquidation gains/(losses) | (23,805) | (31,751)
Repurchases | (305) | (318)
Transfer to REO | (42,645) | (55,886)
Balance at end of period | $ 1,243,792 | 1,512,337
Recurring basis | Level 3 | Term Notes Backed by MSR-Related Collateral |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance at beginning of period |  | 538,499
Purchases and capitalized advances |  | 219,166
Collection of principal, net of liquidation gains/(losses) |  | (4,584)
Changes in unrealized gain/(losses) |  | 513
Transfer to Level 3 |  | 0
Balance at end of period |  | $ 753,594

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- Definition Residential Whole Loans Held at Fair Value, Purchase Transaction Committed in Previous Period, Closed in Subsequent Period + References No definition available. + Details
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- Definition Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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