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Fair Value of Financial Instruments (Level 3 Assets) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Jun. 30, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Loans committed to purchase in previous period, closing in subsequent period | $ 87,000 | $ 34,400 | $ 87,000 | $ 34,400 |
Residential whole loans held at fair value for which the closing price of the purchase transaction had not occurred | 70,600 |  | 70,600 |  | $ 1,800
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 | 1,438,827 | 1,468,540 | 1,471,263 | 1,325,115 |
Purchases and capitalized advances | 92,208 | 76,566 | 227,595 | 393,867 |
Changes in fair value recorded in Net gain on residential whole loans measured at fair value through earnings | 13,185 | 8,442 | 33,312 | 26,788 |
Collection of principal, net of liquidation gains/(losses) | (37,565) | (54,331) | (112,386) | (155,199) |
Repurchases | 0 | (561) | (1,216) | (1,623) |
Transfer to REO | (53,486) | (51,089) | (165,399) | (141,381) |
Balance at end of period | 1,453,169 | 1,447,567 | 1,453,169 | 1,447,567 |
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 | 1,106,026 | 381,390 | 538,499 | 381,804 |
Purchases and capitalized advances | 0 | 290,042 | 573,137 | 439,392 |
Collection of principal, net of liquidation gains/(losses) | (3,920) | (166,120) | (12,897) | (316,120) |
Changes in unrealized gain/(losses) | 2,024 | (117) | 5,391 | 119 |
Transfer to Level 2 | (1,104,130) | 0 | (1,104,130) | 0 |
Balance at end of period | $ 0 | $ 505,195 | $ 0 | $ 505,195 |

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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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